Adsorption-enhanced nitrogen-doped mesoporous CeO2 as an efficient visible-light-driven catalyst for CO2 photoreduction. Issue 39 (July 2020)

• Record Type: Journal Article
• Authors: Shen, Zhangfeng; Xia, Qineng; Li, Yaguang; Yin, Chaochuang; Ge, Zhigang; Li, Xi; Wang, Yangang
• Is Part Of: Journal of CO₂ utilization. Issue 39(2020)
• Publication Date: 2020-07
• Subjects: Nitrogen-doped CeO2 -- Mesoporous -- Photocatalyst -- CO2 reduction -- Oxygen -- Vacancy; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2020.101176
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: A nitrogen-doped mesoporous CeO2 (NMCe) is prepared by urea-assisted template method. The NMCe has relatively ordered mesostructure and high surface area. The NMCe shows improved CO2 adsorption ability. The NMCe has narrowed band gap, high surface oxygen vacancy content. The NMCe shows enhanced catalytic activity for CO2 reduction under visible light. Abstract: Direct converting of CO2 to valuable fuels via solar-powered photoreduction is a promising "green chemistry" route. The key issue for this approach is the exploitation of low-cost and high-efficiency photocatalysts. Here, a novel nanoflakelet-constructed nitrogen-doped CeO2 with relatively ordered mesostructure (NMCe) is prepared through a facile and cheap urea-assisted template method. In comparison with nanocasted ordered mesoporous CeO2 (OMCe) with the similar textural properties, the NMCe shows improved CO2 adsorption ability and has lowered band gap energy, higher surface Ce 3+ concentration and more surface oxygen vacancies. Owing to these characteristics, the NMCe exhibits considerably enhanced photocatalytic performance for visible-light-driven reduction of CO2, where the yields of CO and CH4 are 2.5-fold higher than those on OMCe.