Photocatalytic reduction of CO2 into CH4 over Ru-doped TiO2: Synergy of Ru and oxygen vacancies

被引：76
|
作者：
Zhou, Yimeng [1 ]
Zhang, Qianxiao [1 ]
Shi, Xiangli [2 ]
Song, Qi [1 ]
Zhou, Changjian [2 ]
Jiang, Deli [1 ]
机构：
[1] Jiangsu Univ, Sch Chem & Chem Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 608卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
CO2; photoreduction; TiO2; Oxygen vacancies; Ru doping; Synergistic effect; HIGHLY EFFICIENT; NANOPARTICLES; NANOSHEETS; ULTRATHIN; H2O; PHOTOREDUCTION; NANOCRYSTALS; CATALYSTS; ULTRAFINE; LAYER;
D O I：
10.1016/j.jcis.2021.11.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Photocatalytic conversion of CO2 and H2O into CH4 is an intriguing approach to achieve solar energy utilization and CO2 conversion, yet remains challenging in conversion efficiency. In this study, we present a synthesis of defected TiO2 nanocrystal with oxygen vacancies (Vo) by a facile Ru doping-induced strategy under hydrothermal condition. The synergistic effect of Ru and oxygen vacancies contributed to the enhanced photocatalytic reduction of CO2 toward CH4. Oxygen vacancies and doped Ru not only can synergistically promote the separation of photogenerated carriers, but also promote the CO2 adsorption, thus enhancing the photocatalytic activities. The optimal Ru-doped TiO2 (denoted as 1% Ru-TiO2-x) exhibited a remarkable enhanced photocatalytic performance with a CH4 yield of 31.63 lmol.g(-1).h(-1), which is significantly higher than Ru-TiO2 and TiO2-x counterparts. This study systematically investigates the multiple roles of Ru in CO2 reduction and provides new insights for the construction of metal oxide photocatalysts with oxygen vacancies by simple doping of metal ions. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码：2809 / 2819
页数：11
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