Potential utility of BiOX photocatalysts and their design/modification strategies for the optimum reduction of CO2

Yang Sun; Sherif A Younis; Ki-Hyun Kim; Vanish Kumar

doi:10.1016/j.scitotenv.2022.160923

Potential utility of BiOX photocatalysts and their design/modification strategies for the optimum reduction of CO₂

Sci Total Environ. 2023 Mar 10:863:160923. doi: 10.1016/j.scitotenv.2022.160923. Epub 2022 Dec 18.

Authors

Yang Sun¹, Sherif A Younis², Ki-Hyun Kim³, Vanish Kumar⁴

Affiliations

¹ Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04673, Republic of Korea.
² Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04673, Republic of Korea; Analysis and Evaluation Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt.
³ Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04673, Republic of Korea. Electronic address: kkim61@hanyang.ac.kr.
⁴ Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala 147004, India. Electronic address: vanish.saini01@gmail.com.

PMID: 36543271
DOI: 10.1016/j.scitotenv.2022.160923

Abstract

As an effective means to efficiently control the emissions of carbon dioxide (CO₂), photo-conversion of CO₂ into solar fuels (or their precursors) is meaningful both as an option to generate cleaner energy and to alleviate global warming. In this regard, bismuth oxyhalide (BiOX, where X = Cl, Br, and I) semiconductors have sparked considerable interest due to their multiple merits (e.g., visible light-harvesting, efficient charge carriers separation, and excellent chemical stability). In this review, the fundamental aspects of BiOX-based photocatalysts are discussed in relation to their modification strategies and associated reduction mechanisms of CO₂ to help expand their applicabilities. In this context, their performance is also evaluated in terms of the key performance metrics (e.g., quantum efficiency (QE), space-time yield (STY), and figure of merit (FoM)). Accordingly, the morphology design of BiOX materials is turned out as one of the most efficient strategies for the maximum yield of CO while the introduction of heterojunctions into BiOX materials was more suitable for CH₄ formation. As such, the adoption of the proper modification approach is recommended for efficient conversion of CO₂.

Keywords: BiOX; CO(2) reduction; Heterojunction; Oxygen vacancy; Photocatalysis.

Publication types

Review