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Constructing Ordered Three‐Dimensional TiO 2 Channels for Enhanced Visible‐Light Photocatalytic Performance in CO 2 Conversion Induced by Au Nanoparticles
Author(s) -
Xue Hairong,
Wang Tao,
Gong Hao,
Guo Hu,
Fan Xiaoli,
Gao Bin,
Feng Yaya,
Meng Xianguang,
Huang Xianli,
He Jianping
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201701807
Subject(s) - photocatalysis , materials science , visible spectrum , mesoporous material , surface plasmon resonance , nanoparticle , adsorption , nanotechnology , chemical engineering , absorption (acoustics) , photochemistry , catalysis , optoelectronics , composite material , chemistry , organic chemistry , engineering
As a typical photocatalyst for CO 2 reduction, practical applications of TiO 2 still suffer from low photocatalytic efficiency and limited visible‐light absorption. Herein, a novel Au‐nanoparticle (NP)‐decorated ordered mesoporous TiO 2 (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 2 shows high photocatalytic performance for CO 2 reduction under visible light. The ordered mesoporous TiO 2 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 2 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 2 reduction under visible light by constructing OMT‐based Au‐SPR‐induced photocatalysts.