Pb-Free Cs3Bi2I9 Perovskite as a Visible-Light-Active Photocatalyst for Organic Pollutant Degradation

Nanomaterials

Bianca-Maria Bresolin¹  Mika Sillanpää²  Carsten Günnemann³  DetlefW. Bahnemann³ 

[1] Department of Separation Sience, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, 50130 Mikkeli, Finland;Institute of Research and Development, Duy Tan University, De Nang 550000, Vietnam;Institute of Technical Chemistry, Leibniz University Hannover, Callinstraße 3, D-30167 Hannover, Germany;

关键词: halide perovskite;    laser photolysis;    charge carrier separation;    visible light activity;   

DOI  :  10.3390/nano10040763

来源: DOAJ

【 摘 要 】

In our work, we employed Cs₃Bi₂I₉ as a visible-light-active photocatalyst, synthesized with a low-temperature solvothermal method. The morphological and structural properties of the as-prepared perovskite were investigated, and the results were compared to previous studies to confirm its nature and the quality of the synthesis procedure. Transient absorption spectroscopy was applied in order to investigate the generation and lifetime of photogenerated charge carriers, revealing their formation after visible light excitation. The potential photocatalytic activity of the as-prepared metal halide perovskite was applied for the removal of Rhodamine B in aqueous solution, demonstrating an excellent activity of 93% after 180 min under visible-light irradiation. The current research aims to provide insights into the design of a new visible-light-active photocatalyst, Cs₃Bi₂I₉, selected for its high application value in the field of advanced materials for light harvesting.

【 授权许可】

Unknown