|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Water chemistry controlled aggregation and photo-transformation of silver nanoparticles in environmental waters显示文摘The inevitable release of engineered silver nanoparticles(Ag NPs) into aquatic environments has drawn great concerns about its environmental toxicity and safety. Although aggregation and transformation play crucial roles in the transport and toxicity of Ag NPs, how the water chemistry of environmental waters influences the aggregation and transformation of engineered Ag NPs is still not well understood. In this study, the aggregation of polyvinylpyrrolidone(PVP) coated Ag NPs was investigated in eight typical environmental water samples(with different ionic strengths, hardness, and dissolved organic matter(DOM) concentrations) by using UV–visible spectroscopy and dynamic light scattering. Raman spectroscopy was applied to probe the interaction of DOM with the surface of Ag NPs. Further, the photo-transformation and morphology changes of Ag NPs in environmental waters were studied by UV–visible spectroscopy, inductively coupled plasma mass spectrometry, and transmission electron microscopy. The results suggested that both electrolytes(especially Ca2+and Mg2+) and DOM in the surface waters are key parameters for Ag NP aggregation, and sunlight could accelerate the morphology change, aggregation, and further sedimentation of Ag NPs. This water chemistry controlled aggregation and photo-transformation should have significant environmental impacts on the transport and toxicity of Ag NPs in the aquatic environments. | Yongguang Yin Xiaoya Yang Xiaoxia Zhou Weidong Wang Sujuan Yu Jingfu Liu Guibin Jiang | 2015 | Journal of Environmental Sciences2015，27，8： | 9 |
| 2 | Studies on Redox Properties of Heteropoly Compounds Containing Rare Earth Elements显示文摘The redox properties of four series of more than one handred acids and salts of rare earth heteropoly compounds, such as LnHSiMoi2O40, In (PMo11 O39)211-, Ln (PW11 O39)211-, Ln (AsW11 O39)211-, Ln(GeW11O39)213-, Ln(BW11O39)215-, Ln(GaW11O39)216-, Ln(P2Mo17O61)217-, Ln (As2W17O61)217-, Ln2P2Mo18O62and Ln2HP2Mo17VO62(Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, etc. ) which have Keggin, Daw-son and their derivative structures, were studied by means of potentiometric titration, polarography and cy-clovoltammetry. The mechanisms of the redox reactions were supposed-and the orders of redox ability of the heteropoly compounds were concluded. The periodic changes in reduction potentials of Ln(PMo11O39)211-and Ln(P2Mo17O61)2217- with Ln atomic numbers, and the correlation between E1/2 of Ln(XMo11O39)2(?)-(X =P, Ge, Si) and nq2(n is the main quantum number of the central atoms and q is their charges) were found. | Wang Enbo, Lu Xinghong, Zhao Shiliang, Liu Jingfu and Zhang Baojian (Defartment of Chemistry, Northeast Normal University, Changchun) | 1989 | Chemical Research in Chinese Universities1989，5，3： | 3 |
| 3 | Enhanced removal of Cr(Ⅵ) by biochar with Fe as electron shuttles显示文摘Biochar is extensively used as an effective soil amendment for environmental remediation.In addition to its strong contaminant sorption capability, biochar also plays an important role in chemical transformation of contaminant due to its inherent redox-active moieties.However, the transformation efficiency of inorganic contaminants is generally very limited when the direct adsorption of contaminants on biochar is inefficient. The present study demonstrates the role of Fe ion as an electron shuttle to enhance Cr(Ⅵ) reduction by biochars. Batch experiments were conducted to examine the effects of Fe(Ⅲ) levels,pyrolysis temperature of biochar, initial solution pH, and biochar dosage on the efficiency of Cr(Ⅵ) removal. Results showed a significant enhancement in Cr(Ⅵ) reduction with an increase in Fe(Ⅲ) concentration and a decrease of initial pH. Biochar produced at higher pyrolysis temperatures(e.g., 700°C) favored Cr(Ⅵ) removal, especially in the presence of Fe(Ⅲ), while a higher biochar dosage proved unfavorable likely due to the agglomeration or precipitation of biochar. Speciation analysis of Fe and Cr elements on the surface of biochar and in the solution further confirmed the role of Fe ion as an electron shuttle between biochar and Cr(Ⅵ). The present findings provide a potential strategy for the advanced treatment of Cr(Ⅵ) at low concentrations as well as an insight into the environmental fate of Cr(Ⅵ) and other micro-pollutants in soil or aqueous compartments containing Fe and natural or engineered carbonaceous materials. | Jingwen Xu Yongguang Yin Zhiqiang Tan Bowen Wang Xiaoru Guo Xia Li Jingfu Liu | 2019 | Journal of Environmental Sciences2019，31，4： | 3 |
| 4 | Microwave-assisted continuous flow phytosynthesis of silver nanoparticle/reduced graphene oxide composites and related visible light catalytic performance显示文摘The creation of an environmentally friendly synthesis method for silver nanomaterials(Ag-NPs)is an urgent concern for sustainable nanotechnology development.In the present study,a novel straightforward and green method for the preparation of silver nanoparti-cle/reduced graphene oxide(AgNP/rGO)composites was successfully developed through the combination of phytosynthesis,continuous flow synthesis and microwave-assistance.Oriental persimmon(Diospyros kaki Thunb.)extracts were used as both plant reducing and capping agents for fast online synthesis of AgNP/rGO composites.The experimental param-eters were optimized and the morphologies of the prepared materials were investigated.The characterization results reveal that spherical AgNPs were quickly synthesized and uni-formly dispersed on rGO sheets using the proposed online system.Fourier transform in-frared spectroscopy analysis confirmed that phenols,flavonoids,and other substances in the plant extracts played a decisive role in the synthesis of AgNP/rGO composites.Using sodium borohydride(NaBH4)degradation of p-nitrophenol(4-NP)as a model,the catalytic activity of the prepared AgNP/rGO materials was evaluated.The complete degradation of 4-NP was achieved within 12 min through the use of AgNP/rGO materials,and the compos-ite had a much better catalytic activity than the bare AgNPs and rGO had.Compared with the conventional chemical method,our online method is facile,fast,cost-efficient,and en-vironmentally friendly. | Houyu Wang Chun-Gang Yuan Chenchen Liu Xuelei Duan Qi Guo Yiwen Shen Jingfu Liu Yongsheng Chen | 2022 | Journal of Environmental Sciences2022，34，5： | 2 |
| 5 | The Effect of Radiation Reabsorption on NO For- mation in CH4/Air Counterflow Diffusion FI- ames 显示文摘 | JINGFU WANG TAKASHI NIIOKA | 2001 | Theory and Modeling2001，15，3： | 1 |
| 6 | Inducible Excision of Selectable Marker Gene from Transgenic Plants by the Cre/lox Site-specific Recombination System显示文摘 | Yong Wang Bojun Chen Yuanlei Hu Jingfu Li Zhongping Lin | 2005 | Transgenic Research2005，，5： | 1 |
| 7 | Synthesis and characterization of undecatungstotitanates incorporating a lanthanide or a transition metal显示文摘 | Jingfu Liu Wei Wang Zhiping Zhu Enbo Wang Zuoping Wang | 1991 | Transition Metal Chemistry1991，，2： | 1 |
| 8 | Microscale Chemical Features of Sediment-Water Interface in Hongfeng Lake显示文摘In situ microscale distributions of O_2, H_2 S, p H and redox potential in sediments of Hongfeng Lake, SW China, were investigated using the powerful microsensor technique. Our results show that O_2 was depleted within the top 3.9 mm in surface sediments, and H_2 S was subsequently detected at ~6.0 mm depth, and reached its maximum concentrations at ~25 mm. The degradation of organic matter and reduction of sulfate might be the major pathways of producing H_2 S in sediments. p H rapidly reduced in surface layers mainly due to H+ release in the oxidation of organic matter. Eh also decreased sharply in surface sediments, probabl indicating the coexistence of Fe and Mn oxides with O_2 in aerobic region. Furthermore, the programme of PROFILE was applied to model the O_2 gradient, and good fit was obtained between the simulative values and the factual values both in sediments and in the diffusive boundary layer(DBL). The results indicate that the depth-integrated O_2 consumption rates within sediments were 0.083 and 0.134 nmol·m^(-3)·s^(-1) in site S1 and site S2, respectively. In addition, there were distinct DBL in two sediment profiles, with 1.2 mm thickness in S1 and 0.9 mm thickness in S2. The diffusive fluxes of O_2 within the DBL were 67.13 nmol·m-2·s^(-1) in S1 and 88.54 nmol·m-2·s^(-1) in S2. | Jingfu Wang Jing'an Chen Zhihui Dai Jian Li Yang Xu Jing Luo | 2016 | Journal of Earth Science2016，27，6： | 1 |
| 9 | The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake显示文摘In order to characterize the oxygen isotopic composition of internal phosphate and explore the possibility of using these data to identify phosphate sources, we measured oxygen isotopic compositions of phosphate(δ^(18)O_p) in sediment pore water in Hongfeng Lake, a typical deep-water lake in a mountainous area. These data, in combination with δ^(18)O_p in surface water samples and water column samples, were successfully used to identify phosphate sources. The δ^(18)O_p value of sediment pore water ranged from 15.2% to 15.8%, with an average value of 15.5%—the δ^(18)O_p value of internal phosphate. The δ^(18)O_p values decreased gradually through the water column from 19.4% in surface water to 16.4% in deeper water, implying that internal phosphate had more negative δ^(18)O_p values than external phosphate. This finding was substantiated by horizontal variations in δ^(18)O_p values, which decreased with increasing distance from inflowing rivers. All collected evidence suggests that external and internal phosphate have distinctly different isotopic signatures and that these signatures have not been considerably altered by biological mediation in Hongfeng Lake. Therefore, δ^(18)O_p can be used to distinguish phosphate sources. A two-endmember mixing model showed that internal phosphate had an average contribution of 40%, highlighting the influence of internal phosphorus loading on aqueous phosphate and eutrophication. This study illustrates the need to reduce the internal phosphorus load from sediment and provides guidance for nutrient management and in-lake restoration treatment in Hongfeng Lake. The data presented here are limited, but serve to highlight the great potential of δ^(18)O_p as an effective tracer for identifying phosphate sources. Systematic investigations of the oxygen isotopic compositions of external phosphate, internal phosphate, and phosphate through the water column, in combination with in-lake P biogeochemical cycle study, would be desirable in further research. | Yongxue Ji Jingan Chen Runyu Zhang Yong Liu Jingfu Wang | 2017 | Acta Geochimica2017，36，4： | 1 |
| 10 | Construction of Virtual Simulation Platform for Tourism显示文摘This paper introduced the application of the WebGIS and virtual reality technology in the tourism industry and analyzed the existing problems in the tourism information system.Taking Daqing Oil Field Scenic Sport as an example,it introduced a method of constructing the virtual simulation platform for tourism based on the combination of WebGIS and virtual reality technology.Through the virtual simulation platform of Daqing Tourism Scenic Spot,it verified the design idea,methods,and technical feasibility of the virtual tourism system,and built a specific,feasible,and practical virtual simulation platform for tourism.It showed the bright prospects of virtual tourism development based on WebGIS and virtual reality technology. | Shuang CHENG Qiuju XIE Jingfu ZHU Ya GAO Shuang WANG Ruichen CHI Ruijian LIU | 2017 | Asian Agricultural Research2017，9，2： | 1 |
| 11 | Geothermal characteristics and geological implications of major tectonic units in China显示文摘 | Wang Yang Wang Jiyang Deng Jingfu | 2000 | Journal of China University of Geosciences (English Edition)2000，11，3： | 1 |
| 12 | Diabetes mellitus and risk of prostate cancer: an updated meta-analysis based on 12 case–control and 25 cohort studies显示文摘 | Fan Zhang Yuan Yang Laura Skrip Dayi Hu Yang Wang Chunguang Wong Jingfu Qiu Han Lei | 2012 | Acta Diabetologica2012，，1： | 1 |
| 13 | Selection and Evaluation of Dry and Isentropic Organic Working Fluids Used in Organic Rankine Cycle Based on the Turning Point on Their Saturated Vapor Curves显示文摘The organic Rankine cycle(ORC)is a popular technique used in the utilization of low-grade thermal energy.Among wet,dry,and isentropic organic working fluids,the latter two types are more appropriate for ORC systems.In this paper,the definition of turning point on saturated vapor curve of dry fluid and isentropic fluid was given according to the shape of the saturated curve of working fluids in a T-s diagram.On this basis,the model of near-critical region triangle was established.Using this model,the thermodynamic performance of 57 kinds of dry and isentropic organic working fluids in ORC was evaluated.The performance includes the relation between turning point temperature and cycle thermal efficiency,the relation between near-critical region triangle area and cycle thermal efficiency,the relation between near-critical region triangle area and exergy at turning point temperature,the relation between near-critical region triangle area and reciprocal value of slope of saturated vapor curve.Moreover,working fluid selection was also conducted in terms of heat source type.It was found through theoretical analysis results that the popular R123 is an acceptable choice especially for the utilization of closed type heat source.Considering it will be phased out in near future,then cis-butene,butane,trans-butene,and isobutene are worth studying as its successor.Dodecane is worthy of attention and further research and it can be a good choice for utilization of open type heat source. | ZHANG Xinxin ZHANG Congtian HE Maogang WANG Jingfu | 2019 | Journal of Thermal Science2019，28，4： | 1 |
| 14 | Prevalence of coal workers' pneumoconiosis in China:A systematic analysis of 2001-2011 studies 显示文摘 | Jingfu Mo Lu Wang William Au | 2014 | International Journal of Hygiene and Environmental Health2014，217，1： | 1 |
| 15 | The Effect of Radiation Reabsorption on NO Formation in CH4/Air Counterflow Diffusion Flames显示文摘 | WANG Jingfu TAJASGU N | 2001 | Combustion Theory and Modeling2001，，3： | 1 |
| 16 | Synthesis and Characterization of his (undecatungstocuprate) Lanthanates of potassium显示文摘 | Wu QingYin Wang EnBo Liu JingFu | 1993 | Polyhedron1993，12，21： | 1 |
| 17 | Numerical Simulation of Charging Performance of Combined Sensible-Latent Heat Storage System with a Macro-Encapsulation Method显示文摘In recent years,heat storage system combining sensible and latent heat materials has received more and more attentions.In this paper,we proposed the hybrid configuration with a macro-encapsulation,and analyzed its charging performance with different influencing factors by CFD simulation.In the case,the sensible heat storage materials are magnesia brick or HT concrete and the phase change materials(PCMs)are mixed molten salts.Firstly,we analyzed the heat transfer characteristics of the hybrid configuration in charging process.Then,we analyzed the effect of heating power on charging performance.The maximum temperature of the heating surface shall not exceed 500℃as the constraint condition,the heat storage capacity increases at first and then decreases with the heating power.Then,we compared the charging performance of different solid structure and the hybrid configurations.Whether magnesia brick or HT concrete,the charging performance of the solid structure is better than that of the hybrid configuration,because the thermal conductivity of the molten salt is significantly lower than that of the two sensible heat storage materials.Then,we compared the charging performance of different molten salts.The hybrid configuration with lower melting point molten salt has better performance because of more intensity natural convection.Finally,we analyzed the charging performance of the hybrid configuration used the composite phase change material(CPCM)with high thermal conductivity and specific heat.From the result,the charging performance increases by 22.5%compared with the solid structure.These results indicate that the hybrid configuration with the macro-encapsulation method is a potential form of thermal energy storage,but it needs to be further optimized. | WANG Wei PAN Zhenfei LEI Biao WU Yuting WANG Jingfu MA Chongfang | 2023 | Journal of Thermal Science2023，32，6： | 0 |
| 18 | Preparation and Characterization of Heteropoly Octadecamolybdodiphosphates显示文摘Heteropoly molybdophosphates with general formula M(?)P2Mo18O62 ·xH2O, where M = H+, K+, NH4+, Ca2+, Co2+, Ni2+, Cu2+, Zn2+ and Ag+, were prepared and characterlzed by elemental analysis, IR and UV spectrometry and thermal analysis. The solubilities of the compounds were examined. The IR spectra show that the countercations and the crystallization water have an influence upon the vibration frequencies of vMo-Oc and vMo-Oc-Mo·In the UV spectra, the charge-transfer bands are assigned to e→e and e→b2 transition. All the compounds decompose at 328-534℃. | Wang Enbo, You Wansheng, Liu Jingfu, Hu Changwen Zhang Baojian (Department of Chemistry, Northeast Normal University, Changchun) | 1991 | Chemical Research in Chinese Universities1991，7，1： | 0 |
| 19 | Multislice behavioral modeling based on envelope domain for power amplifiers显示文摘An envelope domain multislice behavioral modeling is introduced. The tradition AM-AM and AM- PM characteristics of power amplifiers are extended to envelope domain and base-band filter is applied to distortion complex envelope signal for description of the envelope memory effect. Using traditional one and two-tone tests, the coeffcients of nonlinear model and the FIR filter can be extracted. At last the model has been applied to a 10 W WCDMA power ampliffer to predict its output signal. And simulation results show that the model output conforms very well to the traditional transistor level simulation results. | Wang Huadong Bao Jingfu Wu Zhengde | 2009 | Journal of Systems Engineering and Electronics2009，20，2： | 0 |
| 20 | Synthesis and Characterization of Bis(undeca-tungstoferrate) Lanthanates of Potassium显示文摘A series of novel rare earth complexes with 11-tungstoferrate as ligand, K15Ln(FeW11 O39)2 .xH2O(Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er or Yb) were prepared and characterized by elemental analyses, IR, UV-vis, polarograms, magnetic susceptibility and thermal measurement.Keywords Heteropoly complex, Rare earth complex, Synthesis, Bis(undecatungstoferrate) lanthanates of | Liu Jingfu, Zong Ruifa, Liang Zhaojun, Wang Enbo and Shen Enhong (Department of Chemistry, Northeast Normal University, Changchun) | 1990 | Chemical Research in Chinese Universities1990，6，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员