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53篇 您的检索式:作者名="Jianjun PAN"
    题名 作者 年代 出处 被引量
1Assessing the relative role of climate change and human activities in sandy desertification of Ordos region, China显示文摘Climate change and human activities are driving forces of sandy desertification and the relative role of them in sandy desertification is the hot point in related researches. A study was carried to assess the relative role of climate change and human activities in sandy desertification of Ordos region in China. Potential NPP and the difference between potential and actual NPP were selected as indicators to assess the relative role of climate change and human activities in sandy desertification, respectively. Assessing methods were built based on some scenarios for the reversion and expansion of sandy desertification and the relative role of climate change and human activities in sandy desertification of Ordos region were assessed from 1981 to 2000. The results showed that although some local places experienced an expansion of sandy desertification, the change of sandy desertification of Ordos region from 1981 to 2000 showed a stably reversing trend. The relative role of climate change and human activities in sandy desertification of Ordos region varied at different temporal and spatial scales in the reversion and expansion processes. In the reversion of sandy desertification, climate change was the dominant factor in the period of 1981 to 1990 and the reversed areas mainly induced by climate change including Mu Us sandy land and the transition zone between temperate steppe and temperate deciduous scrubs in north east of Ordos region; however, human activities controlled the reversed process during the period from 1991 to 2000 and the areas mainly induced by human activities distributed in all banners of Ordos region. In the expansion of sandy desertification, human activities were the dominant factor in the period of 1981 to 1990 and the expanded areas mainly included the regions around common boundary of Hanggin, Dalad Banners and Dongsheng City; however, climate change dominated the expansion of sandy desertification from 1991 to 2000, the expanded areas equably distributed in the whole of Ordos region except the south east of Otog Qian, Uxin and Jungar Banners.XU DuanYang KANG XiangWu LIU ZhiLi ZHUANG DaFang PAN JianJun 2009Science China Earth Sciences2009,52,6:19
2Assessment of the relative role of climate change and human activities in desertification:显示文摘Climate change and human activities are the two kinds of driving forces in desertification,and assessing their relative role in desertification is of great significance to deeply understanding the driving mechanisms and preventing desertification expansion.This paper has systematically reviewed the progress of the researches on assessing the relative role of climate change and human activities in desertification from qualitative,semi-quantitative and quantitative aspects respectively.The authors found that there were still some problems in the previous researches.For example,the subjectivity in assessment was obvious,the assessment cannot be easily repeated,and the assessment and its results were always based on administrative regions and less taken and expressed in a continuous space.According to the progress of previous researches and the works conducted by the authors recently,we put forward a quantitative approach by selecting NPP as a common indicator to measure the relative role of climate change and human activities in desertification and dividing the ecological process of 'driving force effect-dynamic response of desertified land' into several scenarios.Meanwhile,validation and scale of assessment should be taken into account when quantitative assessment of the relative role of climate change and human activities in desertification are carried out.XU Duanyang LI Chunlei ZHUANG Dafang PAN Jianjun 2011Journal of Geographical Sciences2011,21,5:16
3Land-use induced changes in topsoil organic carbon stock of paddy fields using MODIS and TM/ETM analysis:A case study of Wujiang County,China显示文摘Topsoil soil organic carbon (SOC) that plays an important role in mitigating atmospheric carbon dioxide (CO_2) buildup is greatly affected by human activities.To evaluate the influence of land-use changes on SOC stocks in paddy soils,a new algorithm was developed by integrating MODIS (moderate resolution imaging spectral-radiometer) and TM/ETM data for timely monitoring the land-use change in Wujiang County.Thereafter,the land-use class-maps derived from MODIS and TM/ETM analyses were further used to est...GAO, Jianfeng PAN, Genxing JIANG, Xiaosan PAN, Jianjun ZHUANG, Dafang 2008Journal of Environmental Sciences2008,20,7:15
4Effect of graphene nanoplatelets(GNPs)addition on strength and ductility of magnesium-titanium alloys显示文摘Effect of graphene nanoplatelets(GNPs)addition on mechanical properties of magnesium–10wt%Titanium(Mg–10Ti)alloy is investigated in current work.The Mg-(10Ti+0.18GNPs)composite was synthesized using the semi powder metallurgy method followed by hot extrusion.Microstructural characterization results revealed the uniform distribution of reinforcement(Ti+GNPs)particles in the matrix,therefore(Ti+GNPs)particles act as an effective reinforcing filler to prevent the deformation.Room temperature tensile results showed that the addition of Ti+GNPs to monolithic Mg lead to increase in 0.2%yield strength(0.2%YS),ultimate tensile strength(UTS),and failure strain.Scanning Electron Microscopy(SEM),Energy-Dispersive X-ray Spectroscopy(EDS)and X-Ray Diffraction(XRD)were used to investigate the surface morphology,elemental dispersion and phase analysis,respectively.Muhammad Rashad Fusheng Pan Aitao Tang Yun Lu Muhammad Asif Shahid Hussain Jia She Jun Gou Jianjun Mao 2013Journal of Magnesium and Alloys2013,1,3:10
5Co-seismic Faults and Geological Hazards and Incidence of Active Fault of Wenchuan Ms 8.0 Earthquake,Sichuan,China显示文摘There are two co-seismic faults which developed when the Wenchuan earthquake happened. One occurred along the active fault zone in the central Longmen Mts.and the other in the front of Longmen Mts.The length of which is more than 270 km and about 80 km respectively.The co-seismic fault shows a reverse flexure belt with strike of N45°-60°E in the ground,which caused uplift at its northwest side and subsidence at the southeast.The fault face dips to the northwest with a dip angle ranging from 50°to 60°.The vertical offset of the co-seismic fault ranges 2.5-3.0 m along the Yingxiu-Beichuan co-seismic fault,and 1.5-1.1 m along the Doujiangyan-Hanwang fault.Movement of the coseismic fault presents obvious segmented features along the active fault zone in central Longmen Mts. For instance,in the section from Yingxiu to Leigu town,thrust without evident slip occurred;while from Beichuan to Qingchuan,thrust and dextral strike-slip take place.Main movement along the front Longmen Mts.shows thrust without slip and segmented features.The area of earthquake intensity more thanⅨdegree and the distribution of secondary geological hazards occurred along the hanging wall of co-seismic faults,and were consistent with the area of aftershock,and its width is less than 40km from co-seismic faults in the hanging wall.The secondary geological hazards,collapses,landslides, debris flows et al.,concentrated in the hanging wall of co-seismic fault within 0-20 km from co-seismic fault.MA Yinsheng LONG Changxing TAN Chengxuan WANG Tao GONG Mingquan LIAO Chunting WU Manlu SHI Wei DU Jianjun PAN Feng 2009Acta Geologica Sinica(English Edition)2009,83,4:7
6Expression of Beclin1 in non small cell lung cancer and its clinical significance显示文摘Objective:To investigate the expression of autophagy related gene;Beclin1 in human non-small cell lung cancer(NSCLC)tissues.Methods:Protein expression of Beclin1 was determined by immunofluorescence staining and Western Blot,mRNA expression was analyzed by RT-PCR.Results:Immunofluorescence staining revealed that the level of Beclin1 expression in lung cancer was significantly lower than that in adjacent noncancerous tissues and normal tissues(expression rate 8.3%,P=0.000).The Beclin1 mRNA expression in lung cancer,adjacent noncancerous tissues and normal tissues was 1.372(±0.475)1.721(±0.521)and 1.553(±0.554)when F = 15.0,P < 0.01.Beclin1 protein expression in lung cancer,adjacent noncancerous tissues and normal tissues was 3.453(±0.852)5.423(±1.351)and 6.878(±0.997)F = 11.2,P < 0.01.Conclusion:The protein and mRNA expression of Beclin1 in lung cancer was much lower than those in and around cancer tissues and normal tissues,those differences having statistical significance.However in adjacent noncancerous tissues and normal tissues,the expression showed no difference.Quan Liu Jianjun Wang Yongcheng Pan Lifeng Meng Xi Zhan 2008Journal of Nanjing Medical University2008,22,2:6
7Improved TQWT for marine moving target detection显示文摘Under the conditions of strong sea clutter and complex moving targets,it is extremely difficult to detect moving targets in the maritime surface.This paper proposes a new algorithm named improved tunable Q-factor wavelet transform(TQWT)for moving target detection.Firstly,this paper establishes a moving target model and sparsely compensates the Doppler migration of the moving target in the fractional Fourier transform(FRFT)domain.Then,TQWT is adopted to decompose the signal based on the discrimination between the sea clutter and the target’s oscillation characteristics,using the basis pursuit denoising(BPDN)algorithm to get the wavelet coefficients.Furthermore,an energy selection method based on the optimal distribution of sub-bands energy is proposed to sparse the coefficients and reconstruct the target.Finally,experiments on the Council for Scientific and Industrial Research(CSIR)dataset indicate the performance of the proposed method and provide the basis for subsequent target detection.PAN Meiyan SUN Jun YANG Yuhao LI Dasheng XIE Sudao WANG Shengli CHEN Jianjun 2020Journal of Systems Engineering and Electronics2020,31,3:6
8A novel approach to melt purification of magnesium alloys显示文摘A novel low-cost method for melt purification of magnesium alloys,the melt self-purifying technology(MSPT),has been developed successfully based on a low temperature melt treatment(LTMT)without adding any fluxes.The iron solubility in the molten liquid of magnesium and its alloys,and the settlement velocity of iron particles were calculated.It is shown that the low temperature melt treatment is an effective method to decrease the impurity Fe content in magnesium and its alloys.Without any additions,the Fe content in the AZ31 alloy was reduced to 15 ppm from the initial 65 ppm,and the Fe content in the AZ61 melt was decreased to 20 ppm from the initial 150 ppm after the low temperature melt treatment.The results also showed that the Fe content in AM60 and AM50 dropped to 15 and 18 ppm,respectively,from the initial 150 ppm after the low temperature melt treatment.For ZK 60,the Fe content in the melt down to less than 5 ppm was achieved.After the low temperature melt treatment,the Si content in the above alloys was also decreased obviously.Fusheng Pan Xianhua Chen Tao Yan Tingting Liu Jianjun Mao Wei Luo Qin Wang Jian Peng Aitao Tang Bin Jiang 2016Journal of Magnesium and Alloys2016,4,1:5
9Gene characterization and molecular pathway analysis of reverse thermosensitive genic male sterility in eggplant(Solanum melongena L.)显示文摘The naturally occurring mutant eggplant line 05ms was identified with reverse thermosensitive genic male sterility(rTGMS),but its temperature-responsive fertility mechanisms remain largely unknown.Here,we studied the flower morphology,anther cellular structure,and genome-wide gene expression of this rTGMS line.Candidate genes for thermosensitive male sterility during the microspore development of 05ms and the temperature-insensitive line S63 under low-temperature(LT)and high-temperature(HT)conditions were identified.Under LT,tapetum cells were vacuolated and had delayed disintegration in 05ms.RNA-seq analysis indicated that DEGs were enriched in the KEGG pathways‘plant hormone signal transduction’,‘starch and sucrose metabolism’,and‘phenylpropanoid biosynthesis’.We identified two genes,4CLL1(Sme2.5_00368.1_g00010.1)and CKI1(Sme2.5_10056.1_g00002.1),which could potentially regulate eggplant anther development and may be candidate genes for rTGMS.Finally,we propose a working model of anther abortion for rTGMS in eggplant.CKI1 responds to LT stress and causes expression changes in genes related to anther development,such as 4CLL1,and the cellular structure of the tapetum becomes abnormal,causing male sterility.The findings of this study explain the underlying molecular mechanisms of male sterility in eggplant rTGMS lines.Bing Li Xueping Chen Yanrong Wu Aixia Gu Jingjing Zhang Shuangxia Luo Xiurui Gao Jianjun Zhao Xiuqing Pan Shuxing Shen 2019Horticulture Research2019,6,1:5
10Distribution and sources of heavy metals in the sediment of Xiangshan Bay显示文摘Heavy metals in the surface sediments and sediment core from the Xiangshan Bay, a mariculture base on the coast of the East China Sea, were determined by inductively coupled plasma mass spectrometry(ICP–MS) in order to evaluate their levels and sources. The results showed that the levels of Cu, Pb, Zn, and Cr in the sediments of the bay have been generally influenced by anthropogenic inputs since the founding of the People's Republic of China. In particular, Cu and Zn were polluted to some extent, as evidenced by high enrichment factors. Organic matter, grain size, wastewater discharge, and low energy hydrodynamic environment played dominant roles in the heavy metal enrichment in the sediments. The ratio of terrigenous source to marine biogenic deposit of trace metals in the sediments was calculated, revealing that terrigenous inputs were the main source of Cu, Pb, and Zn, while biological pellets contributed much more to the enrichment of Cr and Cd. Considering the influence of biological sources on the enrichment of Cd and Cr, and the fact that the sediment has been polluted by Cu and Zn, the development of mariculture and discharge of wastewater into the Bay should be restricted.SUN Weiping YU Jianjun XU Xiaoqun ZHANG Weiyan LIU Ruijuan PAN Jianming 2014Acta Oceanologica Sinica2014,33,4:4
11Oxygen‑Deficient β‑MnO_(2)@Graphene Oxide Cathode for High‑Rate and Long‑Life Aqueous Zinc Ion Batteries显示文摘Recent years have witnessed a booming interest in grid-scale electrochemical energy storage,where much attention has been paid to the aqueous zinc ion batteries(AZIBs).Among various cathode materials for AZIBs,manganese oxides have risen to prominence due to their high energy density and low cost.However,sluggish reaction kinetics and poor cycling stability dictate against their practical application.Herein,we demonstrate the combined use of defect engineering and interfacial optimization that can simultaneously promote rate capability and cycling stability of MnO_(2) cathodes.β-MnO_(2) with abundant oxygen vacancies(VO)and graphene oxide(GO)wrapping is synthesized,in which VO in the bulk accelerate the charge/discharge kinetics while GO on the surfaces inhibits the Mn dissolution.This electrode shows a sustained reversible capacity of~129.6 mAh g^(−1) even after 2000 cycles at a current rate of 4C,outperforming the state-of-the-art MnO_(2)-based cathodes.The superior performance can be rationalized by the direct interaction between surface VO and the GO coating layer,as well as the regulation of structural evolution ofβ-MnO_(2) during cycling.The combinatorial design scheme in this work offers a practical pathway for obtaining high-rate and long-life cathodes for AZIBs.Shouxiang Ding Mingzheng Zhang Runzhi Qin Jianjun Fang Hengyu Ren Haocong Yi Lele Liu Wenguang Zhao Yang Li Lu Yao Shunning Li Qinghe Zhao Feng Pan 2021Nano-Micro Letters2021,13,11:3
12Performance of different drought indices for agriculture drought in the North China Plain显示文摘The Palmer drought severity index(PDSI), standardized precipitation index(SPI), and standardized precipitation evapotranspiration index(SPEI) are used worldwide for drought assessment and monitoring. However, substantial differences exist in the performance for agricultural drought among these indices and among regions. Here, we performed statistical assessments to compare the strengths of different drought indices for agricultural drought in the North China Plain. Small differences were detected in the comparative performances of SPI and SPEI that were smaller at the long-term scale than those at the short-term scale. The correlation between SPI/SPEI and PDSI considerably increased from 1-to 12-month lags, and a slight decreasing trend was exhibited during 12-and 24-month lags, indicating a 12-month scale in the PDSI, whereas the SPI was strongly correlated with the SPEI at 1-to 24-month lags. Interestingly, the correlation between the trend of temperature and the mean absolute error and its correlation coefficient both suggested stronger relationships between SPI and the SPEI in areas of rapid climate warming. In addition, the yield–drought correlations tended to be higher for the SPI and SPEI than that for the PDSI at the station scale, whereas small differences were detected between the SPI and SPEI in the performance on agricultural systems. However, large differences in the influence of drought conditions on the yields of winter wheat and summer maize were evident among various indices during the crop-growing season. Our findings suggested that multi-indices in drought monitoring are needed in order to acquire robust conclusions.LIU Xianfeng ZHU Xiufang PAN Yaozhong BAI Jianjun LI Shuangshuang 2018Journal of Arid Land2018,10,4:3
13Comprehensive test stand for high-intensity cyclotron development显示文摘A comprehensive test stand for high-intensity cyclotron development,a 10 MeV 430 μA cyclotron,has been successfully constructed at China Institute of Atomic Energy (CIAE) for the experimental verification of the viability of a 100 MeV high-intensity cyclotron (CYCIAE-100) being constructed at CIAE.The verification includes the overall design technology,detail design and engineering technology for the crucial parts of the machine,e.g.main magnet and beam diagnostics.It will also pave the way for future enhancement of the beam intensity.The test stand consists of a H-ion source,axial injection system,central region,main magnet and coil,RF resonator,stripping extraction,and auxiliary systems,which include the RF power amplifier,high voltage and DC power supplies,electric apparatus,beam diagnostics,control,vacuum,water cooling,pneumatic system,and safety interlock.This paper presents the work regarding the design and sub-system development of the test sand,and the results of the beam commissioning of the machine.ZHANG TianJue LI ZhenGuo CHU ChengJie XING JianSheng GUAN FengPing ZHONG JunQing JI Bin GE Tao YIN ZhiGuo HOU ShiGang PAN GaoFeng YAO HongJuan LU YinLong WANG ZhenHui WU LongCheng LIN Jun JIA XianLu WEI SuMin WEN LiPeng WANG Feng XIA Le CAI HongRu XIE HuaiDong CHEN RongFan ZHANG Yan ZHANG SuPing LIU GengShou ZOU Jian AN ShiZhong YANG JianJun BI YuanJie YANG Fang 2011Chinese Science Bulletin2011,56,3:3
14Highly efficient and stable solar-powered desalination by tungsten carbide nanoarray film with sandwich wettability显示文摘Solar-powered desalination is a promising way to resolve the worldwide water crisis for its low con- sumption and simple facility. Considering the fragility and aggregations of traditional materials, which may decrease efficiency, we herein introduce a robust tungsten carbide (WC) nanoarray film as a stable and efficient photothermal material, whose absorption is over 97.5% throughout almost the whole solar spectrum range (220–2200 nm) due to nanoarray structure and thus enhanced localized surface plasmon resonance. Besides, for the first time, we modified the film with sandwich wettability. It accelerates evap- oration by reducing water’s reflection of light, enlarging hydrophobic-hydrophilic boundaries, and depressing heat dissipation. Combining high absorption with unique wettability, the WC nanoarray film offers high solar-to-vapor efficiency of 90.8% and produces drinking water at the rate of (1.06 ± 0.10) kg m^(-2)h^(-1)from man-made seawater and (0.98 ± 0.18) kg m^(-2)h^(-1)from heavy metal sewage under one sun (AM 1.5) while 98% performance remains after 1 h×100 times’ reutilization.Nana Han Kai Liu Xinping Zhang Meng Wang Pan Du Zhaohui Huang Daojin Zhou Qian Zhang Tengfei Gao Yin Jia Liang Luo Jianjun Wang Xiaoming Sun 2019Science Bulletin2019,64,6:2
15Association of systemic inflammation and body mass index with survival in patients with resectable gastric or gastroesophageal junction adenocarcinomas显示文摘Objective:The systemic inflammation index and body mass index(BMI)are easily accessible markers that can predict mortality.However,the prognostic value of the combined use of these two markers remains unclear.The goal of this study was therefore to evaluate the association of these markers with outcomes based on a large cohort of patients with gastric cancer.Methods:A total of 2,542 consecutive patients undergoing radical surgery for gastric or gastroesophageal junction adenocarcinoma between 2009 and 2014 were included.Systemic inflammation was quantified by the preoperative neutrophil-to-lymphocyte ratio(NLR).High systemic inflammation was defined as NLR≥3,and underweight was defined as BMI<18.5 kg/m2.Results:Among 2,542 patients,NLR≥3 and underweight were common[627(25%)and 349(14%),respectively].In the entire cohort,NLR≥3 or underweight independently predicted overall survival(OS)[hazard ratio(HR):1.236,95%confidence interval(95%CI):1.069–1.430;and HR:1.600,95%CI:1.350–1.897,respectively]and recurrence-free survival(RFS)(HR:1.230,95%CI:1.054–1.434;and HR:1.658,95%CI:1.389–1.979,respectively).Patients with both NLR≥3 and underweight(vs.neither)had much worse OS(HR:2.445,95%CI:1.853–3.225)and RFS(HR:2.405,95%CI:1.802–3.209).Furthermore,we observed similar results in subgroup analyses according to pathological stage,age,and postoperative chemotherapy.Conclusions:Our results showed that preoperative elevated NLR and decreased BMI had a significant negative effect on survival.Underweight combined with severe inflammation could enhance prognostication.Taking active therapeutic measures to reduce inflammation and increase nutrition may help improve outcomes.Xianchun Gao Yanan Pan Weili Han Caie Hu Chenchen Wang Ling Chen Yong Guo Yupeng Shi Yan Pan Huahong Xie Liping Yao Jianjun Yang Jianyong Zheng Xiaohua Li Xiaonan Liu Liu Hong Jipeng Li Mengbin Li Gang Ji Zengshan Li Jielai Xia Qingchuan Zhao Daiming Fan Kaichun Wu Yongzhan Nie 2021Cancer Biology & Medicine2021,18,1:2
16Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell显示文摘Tian TIAN Jianjun TANG Wei GUO Mu PAN 2017Frontiers in Energy2017,11,3:2
17Genetic Characterization of Two Human Cases Infected with the Avian Influenza A(H5N6)Viruses—Guangxi Zhuang Autonomous Region,China,2021显示文摘Summary What is known about this topic?H5N6 has replaced H5N1 as a dominant avian influenza virus(AIV)subtype in southern China.The increasing genetic diversity and geographical distribution of H5N6 pose a serious threat to the poultry industry and human health.What is added by this report?A total of 2 cases of H5N6 that occurred from February 2021 to July 2021 in Guangxi.Fuyin Bi Lili Jiang Lihua Huang Jingguang Wei Xiaowen Pan Yu Ju Jianjun Mo Minmei Chen Ning Kang Yi Tan Yonghong Li Jing Wang 2021China CDC weekly2021,3,44:2
18Frequent RNF43 mutation contributes to moderate activation of Wnt signaling in colorectal signet-ring cell carcinoma显示文摘Dear Editor,Signet-ring cell carcinoma(SRCC)is a rare subtype of colorectal cancer(CRC)characterized histologically by the accumulation of mucins in the cytoplasm and displacement of nuclei to the cellular periphery,accounting for about 1%CRC(Fig.S1A)(Borger et al.,2007).Compare to common subtypes of CRC,such as adenocarcinoma(AC)and mucinous adenocarcinoma(MAC),SRCC is associated with aggressive behaviors and younger age at presentation(Kang et al.,2005;Sung et al.,2008;Nitsche et al.,2013;Hugen et al.,2014;Inamura et al.,2015).A retrospective analysis of CRC patient's data at Fudan University Shanghai Cancer Center(FUSCC)also indicated a worse overall and disease-free survival of SRCC patients(Fig.S1B and S1C,Table S1).Yaqi Li Jian Li Renjie Wang Long Zhang Guoxiang Fu Xueying Wang Yebin Wang Chuantao Fang Dandan Zhang Duo Du Xiaoji Ma Mengxue Pan Qiang Guo Xiaoya Xu Xiang Hu Yi Zhou Shaobo Mo Huijun Wang Jianjun Gao Shenglin Huang Yun Liu Sanjun Cai Guoqiang Hua Junjie Peng Fa-Xing Yu 2020Protein & Cell2020,11,4:2
19Bonded Terfenol-D composites with low eddy current loss and high magnetostriction显示文摘Bonded Terfenol-D composites,with high electrical resistivity and low eddy current loss,can be used in an alternating magnetic field with high frequency.However,the nonmagnetic binder impairs the magnetostriction of the composites.To achieve high magnetostriction and low eddy current loss,the mixture of the alloy powder and binder was compressed at low pressure in an oriented magnetic field.After this,the aligned samples were recompressed by cold isostatic pressing(CIP).Besides,the effect of particle size on the magnetostriction of the bonded Terfenol-D composites was also studied.The results showed that the bonded Terfenol-D composites had excellent magnetostriction when the particle size was 50-80 μm.The oriented magnetic field and CIP could improve the magnetostriction of the bonded composites,which reaches 1020×10-6.The bonded Terfenol-D composites had good compact structure and high density(7.24 g/cm3).The magnetic loss of the bonded Terfenol-D composites was 192 mW/cm3 at a frequency of 100 kHz in a magnetic field of 960 A/m,which was about one third of that of casting Terfenol-D alloys.TIAN Jianjun,ZUO Zhijun,PAN De’an,and ZHANG Shengen School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2010Rare Metals2010,29,6:2
20Anchoring Ni single atoms on sulfur-vacancy-enriched ZnIn_(2)S_(4) nanosheets for boosting photocatalytic hydrogen evolution显示文摘Structure manipulation of photocatalysts at an atomic scale is a promising way to improve its photocatalytic performance.Herein,we realize the anchoring of single Ni atoms on the ZnIn_(2)S_(4) nanosheets with rich sulfur vacancies.Experimental results demonstrate that single Ni atoms induce the formation of NiO-M(Zn/In) atomic interface,which can efficiently promote the carriers separation and prolong the carrier life time.In addition,in situ electron spin resonance spectroscopy(ESR) confirms that the single Ni atoms act as an electron trapping center for protons reduction.As a result,the single Ni atoms decorated ZnIn_(2)S_(4) nanosheets with rich sulfur vacancies(Ni/ZnIn_(2)S_(4)-RVs) shows a hydrogen evolution rate up to 89.4 μmol h^(-1), almost 5.7 and 2.3 times higher compared to that of ZnIn_(2)S_(4) nanosheets with poor sulfur vacancies and rich sulfur vacancies(denoted as ZnIn_(2)S_(4)-PVs and ZnIn_(2)S_(4)-RVs).This work opens up a new perspective manipulating the single-atom cocatalyst and sulfur vacancy on sulfide supports for improving photocatalytic hydrogen evolution.Jingwen Pan Gongxin Zhang Zhongjie Guan Qianyu Zhao Guoqiang Li Jianjun Yang Qiuye Li Zhigang Zou 2021Journal of Energy Chemistry2021,30,7:2
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