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Ag-Cu Nanoparticles Supported on N-Doped TiO2 Nanowire Arrays for Effcient Photocatalytic CO2 Reduction
Xiao-nong Wang,Jun Ma,Yang-guang Hu,Ran Long*,Yu-jie Xiong*
Author NameAffiliationE-mail
Xiao-nong Wang Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China  
Jun Ma Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China  
Yang-guang Hu Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China  
Ran Long* Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China longran@ustc.edu.cn 
Yu-jie Xiong* Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China yjxiong@ustc.edu.cn 
Abstract:
Photocatalytic reduction of CO2 into various types of fuels has attracted great interest, and serves as a potential solution to addressing current global warming and energy challenges. In this work, Ag-Cu nanoparticles are densely supported on N-doped TiO2 nanowire through a straightforward nanofabrication approach. The range of light absorption by N-doped TiO2 can be tuned to match the plasmonic band of Ag nanoparticles, which allows synergizing a resonant energy transfer process with the Schottky junction. Meanwhile, Cu nanoparticles can provide active sites for the reduction of CO2 molecules. Remarkably, the performance of photocatalytic CO2 reduction is improved to produce CH4at a rate of 720 μmol·g-1·h-1 under full-spectrum irradiation.
Key words:  Photocatalytic CO2 reduction, Schottky junction, Energy transfer, TiO2, Nanoparticles
FundProject:
Ag-Cu纳米颗粒修饰的N掺杂TiO2纳米棒阵列及其高效光催化CO2还原应用
王晓农,马 军,胡阳光,龙 冉*,熊宇杰*
摘要:
本文采用微纳加工方法制备了负载高密度Ag-Cu纳米颗粒的N掺杂TiO2纳米棒阵列样品. 通过TiO2的N掺杂,可将其吸光范围调控至与Ag纳米颗粒的等离激元吸收频率相匹配的波段,从而实现复合材料中肖特基结与共振能量转移过程的协同作用. 与此同时,Cu纳米颗粒可以为CO2还原提供活性位点. 在全谱光照射下,复合样品光催化CO2还原的活性显著提高,CH4生成速率可达720 μmol·g-1·h-1.
关键词:  光催化CO2还原,肖特基结,能量转移,TiO2,纳米颗粒
DOI:10.1063/1674-0068/31/cjcp1804062
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