Release Time:2019-10-22  Hits:

Indexed by: Journal Article

Date of Publication: 2019-09-15

Journal: JOURNAL OF COLLOID AND INTERFACE SCIENCE

Included Journals: EI、PubMed、SCIE

Volume: 552

Page Number: 476-484

ISSN: 0021-9797

Key Words: CO2 reduction; Co-base spinel; Hierarchical hollow spheres; Photocatalysts; Self-templated method

Abstract: High-performance and low-cost photocatalysts are of significance to artificial photosynthetic systems for converting of CO2 into CO and other value-added products. In this work, we developed a controllable and scalable self-templated approach to fabricate hierarchical Co-base spinet hollow microspheres for visible light-driven CO2 reduction with a Ru-based sensitizer. The hollow microspheres are assembled by ultrathin nanosheets using Ni-Co-hydroxides as the morphology-conserved precursor. A series of characterization techniques were conducted to investigate structural features of the prepared Co-base spinel hollow spheres. Owing to the integration of the specific microstructure, functional Ni/Co species and oxygen vacancies, Co-base spinet hollow spheres possess enhanced CO2 adsorption ability, more active sites, and efficient transfer and separation of photoexcited electrons. The high CO-evolving rate (27.7 mu mol h(-1)) and selectivity (84.4%) manifest desirable performance of Co-base spine] hollow spheres for CO2 photocatalytic reduction. The findings suggest that such spinel-structured bimetallic oxides hierarchical hollow spheres, facilely synthesized via the proposed self-templated method, are efficient for photocatalytic CO2 reduction. (C) 2019 Elsevier Inc. All rights reserved.