Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (1): 22-28.DOI: 10.15541/jim20210458

Special Issue: 【能源环境】CO2绿色转换

• TOPICAL SECTION: Green Conversion of CO2 (Contributing Editor: OUYANG Shuxin, WANG Wenzhong) • Previous Articles     Next Articles

Preparation and Photothermal Catalytic Application of Powder-form Cobalt Plasmonic Superstructures

WANG Xiao(), ZHU Zhijie, WU Zhiyi, ZHANG Chengcheng, CHEN Zhijie, XIAO Mengqi, LI Chaoran(), HE Le()   

  1. Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215000, China
  • Received:2021-07-19 Revised:2021-08-23 Published:2022-01-20 Online:2021-08-20
  • Contact: HE Le, professor. E-mail: lehe@suda.edu.cn; LI Chaoran, associate professor. E-mail: crli@suda.edu.cn
  • About author:WANG Xiao(1997-), female, Master candidate. E-mail: 20194214065@suda.stu.cn
  • Supported by:
    FundNational Natural Science Foundation of China(51802208);FundNational Natural Science Foundation of China(21902113);FundNational Natural Science Foundation of China(52172221)

Abstract:

Highly light absorptive photocatalysts are of great significance to boost the photothermal conversion efficiency. Light trapping effect of nanoarray structured photothermal catalysts can enhance the light absorption and improve the photothermal conversion efficiency. However, the practical applications of array-based catalysts are hindered by very low loadings of active metal catalysts per unit illumination area. Herein, we develop a SiO2-protected MOFs pyrolysis method for the preparation of powder-form cobalt plasmonic superstructures that enable a 90% absorption efficiency of sunlight and tunable metal loading per unit area. Its high light absorption capacity was confirmed by time-domain finite-difference simulation calculations due to the plasmonic hybridization effect of nanoparticles. Compared with nanoarray-structured plasmonic superstructures, the powder-form catalyst exhibit enhanced catalytic activity and stability, resulting in the increase of CO2 conversion efficiency from 0.9% to 26.2%. This study lays the foundation for the practical application of non-precious metal photothermal catalysts.

Key words: photothermal catalysis, carbon dioxide hydrogenation, plasmonic superstructure, strong light absorptive catalyst, solar-to-chemical energy conversion

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