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| 1 | Synthesis and optical characterization of Eu^(2+),Tb^(3+)-codoped Sr_3Y(PO_4)_3 green phosphors显示文摘A series of Eu^(2+),Tb^(3+)-codoped Sr_3 Y(PO_4)_3(SYP) green phosphors were synthesized by hightemperature solid-state reaction. Several techniques, such as X-ray diffraction, UV-vis spectrum,and photoluminescence spectrum, were used to investigate the obtained phosphors. The present study investigates in detail photoluminescence excitation and emission properties, energy transfer between the two dopants, and effects of doping ions on optical band gap. SYP:0.05 Eu2+ phosphor shows an intense and broad excitation band ranging from 220 to 400 nm and exhibits a bright green emission band with CIE chromaticity coordinates(0.189, 0.359) under 350 nm excitation. Green emission of SYP:0.03 Tb3+ is intensified by codoping with Eu^(2+), and energy transfer mechanism between them is demonstrated to be a dipole-dipole interaction. Upon 350 nm excitation, SYP:Eu^(2+),Tb^(3+) phosphors exhibits two dominating bands peaking at 466 and 545 nm, which are assigned to 4 f^65 d^1→4 f^7 transition of Eu^(2+) ions and ~5 D_4→~7 F_5 transition of Tb^(3+) ions, respectively. Optimal doping concentrations of Eu^(2+) and Tb^(3+) in the SYP host are 5 mol% and 15 mol%, respectively. Results indicate that SYP:Eu^(2+),Tb^(3+) phosphors are potentially used as green-emitting phosphors for white light-emitting diodes. | Anxiang Guan Zuizhi Lu Fangfang Gao Xiaoshan Zhang Huan Wang Tianjiao Huang Liya Zhou | 2018 | Journal of Rare Earths2018，36，3： | 4 |
| 2 | Aging effect on the mobility and bioavailability of copper in soil显示文摘Aging effect on the mobility and bioavailability of copper(Cu) was investigated using a spiked soil with different incubation periods from 3 to 56 d.Wheat was planted and earthworms were cultured separately in the incubated soils.The mobility of Cu in soil was evaluated by a chemical fractionation scheme and the toxicity and bioavailability were assessed by measuring the biomass and Cu concentration in tissues.Results showed that aging had a significant effect on Cu fraction distribution,of which Cu tended to incorporate from the exchangeable into more stable fractions such as the reducible and oxidisable fractions.However,aging had little effect on Cu bioavailability to wheat and earthworm.Comparing the soil being incubated for 3 d and 56 d,Cu concentration in wheat roots decreased from 14.5 to 12.8 mg/kg,and no significant changes in Cu concentration were observed in both wheat shoots and earthworms.The Cu concentration was around 2.0 and 50 mg/kg for wheat shoots and earthworms,respectively,irrespective of soil incubation time.The CaCl2-extractable Cu had a linear relationship with Cu concentration in wheat roots(R2 = 0.65,P < 0.05),but no linear relationship can be found for wheat shoots and earthworms.Biological control may be more crucial for Cu accumulation in organism than the changes in soil Cu fraction caused by aging. | LU Anxiang ZHANG Shuzhen QIN Xiangyang WU Wenyong LIU Honglu | 2009 | Journal of Environmental Sciences2009，21，2： | 3 |
| 3 | Multivariate and geostatistieal analyses of the spatial distribution and origin of heavy metals in the agricultural soils in Shunyi,Beijing,China显示文摘 | LU ANXIANG WANG JIHUA QIN XIANGYANG | 2012 | Science of The Total Environment2012，426，： | 1 |
| 4 | Time effect on the fractionation of heavy metals in soils显示文摘 | ANXIANG LU SHUZHEN ZHANG XIAOQUAN SHAN | 2005 | Geoderma2005，125，： | 1 |
| 5 | Multivariate and geostatistical analyses of the spatial distribution and origin of heavy metals in the agricultural soils in Shunyi, Beijing, China显示文摘 | LU Anxiang WANG Jihua QIN Xiangyang | 2012 | Science of the Total Environment2012，425，： | 1 |
| 6 | Preconcentration and determination of trace metals in seawater using a thiol cotton fiber minicolunm coupled with inductively coupled plasma mass spectrometry显示文摘 | Zhang Shuzhen Lu Anxiang Han Fang | 2005 | Anal Sci2005，21，6： | 1 |
| 7 | Multivariate and geostatistical analyses of the spatial distribution and origin of heavy metals in the agricultural soils in Shunyi, Beijing, China显示文摘 | Anxiang Lu Jihua Wang Xiangyang Qin Kaiyi Wang Ping Han Shuzhen Zhang | 2012 | Science of the Total Environment2012，，： | 1 |
| 8 | Multivariate and geostatistical analyses of the spatial distribution and origin of heavy metals in the agricultural soils in Shunyi, Beijing, China显示文摘 | Lu Anxiang Wang Jihua Qin Xiangyang | 2012 | Science of The Total Environment2012，425，： | 1 |
| 9 | Time effect on the fractionation of heavy metals in soils显示文摘 | Anxiang Lu Shuzhen Zhang Xiao-quan Shan | 2004 | Geoderma2004，，3： | 1 |
| 10 | Occurrence and distribution of micro-and mesoplastics in the high-latitude nature reserve,northern China显示文摘Microplastics pollution has received growing attention worldwide in recent years.However,data on microplastics in the freshwater environment are still limited,especially in high-latitude nature reserves in Northern China.The first study on microplastic pollution in the Liaohe River Reserve in Northern China is reported here,and mesoplastics were also incorporated.Surface water and sediment samples were collected from 32 sites along the nature reserve.The abundance,type,shape,color,and size of micro-and mesoplastics were measured using density extraction,optical microscopy,and FTIR spectroscopy.The data showed that diverse micro-and mesoplastics were found widespread in the 32 sites,and the average abundance of these plastics was 0.11±0.0410^(–2) items/L in surface water and 62.29±54.30 items/kg in sediment.Moreover,70%and 66%were smaller than 2000μm in surface water and sediment,respectively.Fiber accounted for 91.86%in surface water and 43.48%in sediment,indicating that the major source of micro-and mesoplastics in the Liaohe River Reserve may be domestic sewage and aquaculture.A total of 16 and 27 polymers were identified in surface water and sediment,respectively,and mostly consisted of rayon,polyester,polystyrene,and poly(ethylene terephthalate).Moreover,both the risk index and the pollution load index demonstrated a low risk of micro-and mesoplastics in surface water and sediment in the Liaohe River Reserve. | Wenwen Gong Yu Xing Lihua Han Anxiang Lu Han Qu Li Xu | 2022 | Frontiers of Environmental Science & Engineering2022，16，9： | 0 |
| 11 | A new electrochemical angular microaccelerometer with integrated sensitive electrodes perpendicular to flow channels显示文摘A new electrochemical angular microaccelerometer with integrated sensitive electrodes perpendicular to flow channels was developed in this paper.Based on a liquid inertial mass,an incoming angular acceleration was translated into varied concentrations of reactive ions around sensitive microelectrodes,generating a detection current.Key structural parameters of the sensitive microelectrodes were designed and compared based on theoretical analysis and numerical simulations.An angular microaccelerometer incorporating sensitive microelectrodes was then fabricated,assembled and characterized,producing a sensitivity of 338 V/(rad/s^(2)),a-3 dB bandwidth of 0.01-10 Hz and a noise level of 4.67×10^(-8)(rad/s^(2))/Hz^(1/2)@1 Hz.These performances were better than their commercial counterparts based on traditional electrodes and previously reported microaccelerometers based on microsensitive electrodes in parallel with flow channels,which can be applied to measure rotational accelerations in earthquakes and buildings. | Bowen Liu Tian Liang Wenje Qi Anxiang Zhong Mingwei Chen Yulan Lu Jian Chen Deyong Chen Junbo Wang | 2022 | Microsystems & Nanoengineering2022，8，4： | 0 |
| 12 | Analysis of hydroxylated polybrominated diphenyl ethers in plant samples using ultra performance liquid chromatography-mass spectrometry显示文摘A method was developed for the analysis of hydroxylated brominated diphenyl ethers (OH-PBDEs) in plant samples using an ultra performance liquid chromatography-triple quadrupole mass spectrometer (UPLC-ESI-MS/MS) in negative mode. Plant samples were extracted and cleaned up through florisil column, resolved on a 100 mm C18 column with linear gradient elution and detected by mass spectrometry in multiple reaction monitoring (MRM) mode. The method provided good recoveries rang- ing from 68.2% to 94.6%, relative standard deviation (RSD) in the range of 3.2% - 9.1%, and limits of quantification (LOQ) defined as the signal-to-noise ratio of 10 of 0.3-2.1 ng/g. It allowed a fast separation and sensitive quantification of the isomers and homologues of seven OH-PBDE congeners 2′-OH-BDE-3, 3′-OH-BDE-7, 4′-OH-BDE-17, 3′-OH-BDE-28, 3-OH-BDE-47, 5-OH-BDE-47 and 6-OH-BDE-47. The method was successfully applied to identify and quantify the formation of hydroxylat- ed metabolites in alfalfa exposed to BDE-209. Five OH-PBDEs were detected in plant tissues, and more congeners were found in roots than in shoots. To our knowledge, this work represents the first attempt to validate UPLC-MS/MS method to quantify OH-PBDEs in plant samples without derivatization. | WANG Sen WU Tong HUANG HongLin PING Hua LU AnXiang ZHANG ShuZhen | 2011 | Science China Chemistry2011，54，11： | 0 |
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