Achieving simultaneous Cu particles anchoring in meso-porous TiO_(2) nanofabrication for enhancing photo-catalytic CO_(2) reduction through rapid charge separation  

作　　者：Jinyan Xiong Mengmeng Zhang Mengjie Lu Kai Zhao Chao Han Gang Cheng Zhipan Wen 

机构地区：[1]College of Chemistry and Chemical Engineering,Hubei Key Laboratory of Biomass Fibers and Ecodyeing&Finishing,Wuhan Textile University,Wuhan 430200,China [2]School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China [3]School of Materials Science and Energy Engineering,Foshan University,Foshan 528000,China [4]Australia School of Civil and Environmental Engineering,Faculty of Engineering and Information Technology,University of Technology Sydney,Sydney,NSW 2007,Australia

出　　处：《Chinese Chemical Letters》2022年第3期1313-1316,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 22102122);the Hubei Provincial Natural Science Foundation (No. 2019CFB386);the Central Committee Guides Local Science and Technology Development Special Project of Hubei Province (No. 2019ZYYD073)。

摘　　要：A facile solvo-thermal approach was successfully employed to prepare titanium oxide (TiO_(2)) nano-aggregates with simultaneous copper particles anchoring. The as-synthesized composite could convert CO_(2) into CH_(4) and CO products under simulated solar irradiation. The impact of copper loading amounts on the photo-reduction capability was evaluated. It was found proper amount of Cu loading could enhance the activity of CO_(2) photo-reduction. As a result, the optimal composite (TiO_(2)^(-)Cu-5%) consisting of TiO_(2) supported with 5% (mole ratio) Cu exhibits 2.2 times higher CH_(4) yield and 3 times higher CO yield compared with pure TiO_(2). Conduction band calculated from the band gap and valence X-ray photoelectron spectroscopy (XPS) indicated TiO_(2) nano-aggregates have suitable band edge alignment with respect to the CO_(2)/CH_(4) and CO_(2)/CO redox potential. Furthermore, with involving of Cu particles, an efficient separation of photo-generated charges was achieved on the basis of photocurrent response and photoluminescence spectra results, which contributed to the improved photo-catalytic performance. The present work suggested that the Cu-decorated TiO_(2) could serve as an efficient photo-catalyst for solar-driven CO_(2) photo-reduction.

关 键 词：TiO_(2) Copper Photo-catalytic CO_(2)reduction PHOTO-CATALYSIS Charge separation Schottky junction 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X701[环境科学与工程—环境工程]