Lead-free perovskite Cs2XCl6 (X = Hf, Zr, Te) microcrystals for photocatalytic CO2 reduction. (August 2022)

• Record Type: Journal Article
• Authors: Tian, Changqing; Huang, Qiang; Wu, Daofu; Lai, Junan; Qi, Fei; Zhang, Nan; Zhang, Wenxia; Tang, Xiaosheng
• Is Part Of: Materials today energy. Volume 28(2022)
• Publication Date: 2022-08
• Subjects: Lead-free -- Double perovskite -- Cs2XCl6 -- Photocatalytic -- CO2 reduction; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2022.101067
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: The lead halide perovskites have broad application prospects in the fields of optoelectronics and photocatalysis. However, their toxicity and limited stability are the main obstacles restricting their large-scale photocatalytic applications. In order to solve these problems, a set of lead-free stable Cs2 XCl6 (X = Hf, Zr, Te) perovskite microcrystals were synthesized via a solvothermal solution. For the first time, the Cs2 XCl6 (X = Hf, Zr, Te) perovskite microcrystals were employed as efficient photocatalysts for the conversion of CO2 into CO and CH4 . Among them, the Cs2 TeCl6 microcrystals showed the best photocatalytic performance under light irradiation for 3 h, while the yields of CO and CH4 were 284.4 μmol/g and 48.96 μmol/g respectively. Our strategy may provide a new idea for the CO2 photoreduction based on lead-free halide perovskites. Graphical abstract: Image 1 Highlights: Lead-free Cs2 XCl6 (X = Hf, Zr, Te) perovskites were first applied to CO2 photocatalytic field. The Cs2 XCl6 (X = Hf, Zr, Te) perovskites exhibited excellent stability under continuous illumination, constant heating, and air conditions. The Cs2 TeCl6 microcrystals showed the best photocatalytic performance.