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您的检索式：作者名="Anxiang Guan"
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| 1 | Enhanced N-doping in mesoporous carbon for efficient electrocatalytic CO2 conversion显示文摘The capability of electrocatalytic reducti on of carbon dioxide(CO2)using nitrogen(N)-doped carb on strongly depe nds on the N-dopi ng level and their types.In this work,we developed a strategy to generate mesoporous N-doped carb on frameworks with tun able configurati ons and contents of N dopants,by using a secondary doping process via the treatment of N,N-dimethylformamide(DMF)solvent.The obtained mesoporous N-doped carbon(denoted as MNC-D)served as an efficient electrocatalyst for electroreduction of CO2 to CO.A high Faradaic efficiency of^92%and a partial current density for CO of-6.8 mA·cm^-2 were achieved at a potential of-0.58 V vs.RHE.Electrochemical analyses further revealed that the active sites within the N-doped carb on catalysts were the pyridinic N and defects gen erated by the DMF treatme nt,which enhan ced the activati on and adsorpti on CO2 molecules.Our study suggests a new approach to develop efficie nt carb on-based catalysts for potential scalable CO2 reduction reaction(CO2RR)to fuels and chemicals. | Min Kuang Anxiang Guan Zhengxiang Gu Peng Han Linping Qian Gengfeng Zheng | 2019 | Nano Research2019，12，9： | 11 |
| 2 | 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 |
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