Achieving high carrier separation over Bi4O5I2through Ni doping for improved photocatalytic CO2reduction

Zhuohua Chen; Xiaoli Jin; Qing Lan; Xin Li; Qunzeng Huang; Wenmin Liu; Yuwei Guo; Haiquan Xie; Liqun Ye

doi:10.1088/1361-6528/ace44c

Achieving high carrier separation over Bi₄O₅I₂through Ni doping for improved photocatalytic CO₂reduction

Nanotechnology. 2023 Jul 19;34(40). doi: 10.1088/1361-6528/ace44c.

Authors

Zhuohua Chen^{1

2}, Xiaoli Jin², Qing Lan², Xin Li², Qunzeng Huang², Wenmin Liu², Yuwei Guo², Haiquan Xie², Liqun Ye³

Affiliations

¹ College of Chemistry, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
² Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China.
³ College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, People's Republic of China.

PMID: 37406614
DOI: 10.1088/1361-6528/ace44c

Abstract

Photocatalytic CO₂reduction is considered to be an appealing way of alleviating environmental pollution and energy shortages simultaneously under mild condition. However, the activity is greatly limited by the poor separation of the photogenerated carriers. Ion doping is a feasible strategy to facilitate the charge transfer. In this work, Ni-doped Bi₄O₅I₂photocatalyst is successfully fabricated using a one-pot hydrothermal method. A few doping levels appear in the energy band of Bi₄O₅I₂after Ni doping, which are used as springboards for electrons transition, thus promoting photoexcited electrons and holes separation. As a consequence, a remarkably enhanced yield of CO and CH₄(6.2 and 1.9μmol g^-1h^-1) is obtained over the optimized Bi₄O₅I₂-Ni15, which is approximately 2.1 and 3.8 times superior to pure Bi₄O₅I₂, respectively. This work may serve as a model for the subsequent research of Bi-based photocatalysts to implement high-performance CO₂photoreduction.

Keywords: Bi4O5I2; Ni doping; carrier separation; doping level; photocatalytic CO2 reduction.