Xue Hairong, Wang Tao, Gong Hao, Guo Hu, Fan Xiaoli, Gao Bin, Feng Yaya, Meng Xianguang, Huang Xianli, He Jianping
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, P. R. China.
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China.
Chem Asian J. 2018 Mar 2;13(5):577-583. doi: 10.1002/asia.201701807. Epub 2018 Feb 15.
As a typical photocatalyst for CO reduction, practical applications of TiO still suffer from low photocatalytic efficiency and limited visible-light absorption. Herein, a novel Au-nanoparticle (NP)-decorated ordered mesoporous TiO (OMT) composite (OMT-Au) was successfully fabricated, in which Au NPs were uniformly dispersed on the OMT. Due to the surface plasmon resonance (SPR) effect derived from the excited Au NPs, the TiO shows high photocatalytic performance for CO reduction under visible light. The ordered mesoporous TiO exhibits superior material and structure, with a high surface area that offers more catalytically active sites. More importantly, the three-dimensional transport channels ensure the smooth flow of gas molecules, highly efficient CO adsorption, and the fast and steady transmission of hot electrons excited from the Au NPs, which lead to a further improvement in the photocatalytic performance. These results highlight the possibility of improving the photocatalysis for CO reduction under visible light by constructing OMT-based Au-SPR-induced photocatalysts.
作为一种典型的用于CO还原的光催化剂，TiO的实际应用仍然存在光催化效率低和可见光吸收受限的问题。在此，成功制备了一种新型的金纳米颗粒（NP）修饰的有序介孔TiO（OMT）复合材料（OMT-Au），其中金纳米颗粒均匀分散在OMT上。由于激发的金纳米颗粒产生的表面等离子体共振（SPR）效应，TiO在可见光下对CO还原表现出高光催化性能。有序介孔TiO具有优异的材料和结构，其高比表面积提供了更多的催化活性位点。更重要的是，三维传输通道确保了气体分子的顺畅流动、高效的CO吸附以及从金纳米颗粒激发的热电子的快速稳定传输，这进一步提高了光催化性能。这些结果突出了通过构建基于OMT的金SPR诱导光催化剂来提高可见光下CO还原光催化性能的可能性。
