A facile strategy to fabricate plasmonic Cu modified TiO2 nano-flower films for photocatalytic reduction of CO2 to methanol

被引：123
作者：
Liu, Enzhou [1 ]
Qi, Lulu [1 ]
Bian, Juanjuan [1 ]
Chen, Yihan [1 ]
Hu, Xiaoyun [2 ]
Fan, Jun [1 ]
Liu, Hanchen [3 ]
Zhu, Changjun [3 ]
Wang, Qiuping [3 ]
机构：
[1] NW Univ Xian, Sch Chem Engn, Xian 710069, Peoples R China
[2] NW Univ Xian, Dept Phys, Xian 710069, Peoples R China
[3] Xian Polytech Univ, Sch Sci, Xian 710048, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2015年 / 68卷
关键词：
Nanostructures; Semiconductors; Thin films; Optical properties; Catalytic properties; VISIBLE-LIGHT; COPPER NANOPARTICLES; AU NANOPARTICLES; CARBON-DIOXIDE; DOPED TIO2; AG; NANOSTRUCTURES; NANOCOMPOSITES; NANOMATERIALS; PERFORMANCES;
D O I：
10.1016/j.materresbull.2015.03.064
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cu nanoparticles (NPs) deposited TiO2 nano-flower films were fabricated using a combination of a hydrothermal method and a microwave-assisted reduction process. The investigations indicated that Cu NPs and TiO2 film both exhibit visible light harvesting properties based on localized surface plasmon resonance (LSPR) of Cu NPs and unique nanostructures of TiO2 film. Fluorescence quenching was observed because the recombination of charge carriers was effectively suppressed by Cu NPs deposition. The experimental results indicate that Cu/TiO2 films exhibit better activity for the photocatalytic reduction of CO2 due to the charge transfer property and LSPR effect of Cu NPs. The CH3OH production rate reached 1.8 mu mol cm(-2) h(-1) (energy efficiency was 0.8%) over 0.5 Cu/TiO2 film under UV and visible light irradiation, which was 6.0 times higher than that observed over pure TiO2 film. In addition, a tentative photocatalytic mechanism is proposed to understand the experimental results over the Cu modified TiO2 nano-flower films. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：203 / 209
页数：7
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