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Indexed by:期刊论文

Date of Publication:2019-09-15

Journal:JOURNAL OF COLLOID AND INTERFACE SCIENCE

Included Journals:SCIE、PubMed、EI

Volume:552

Page Number:476-484

ISSN No.: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.