Light absorption, photocarrier dynamic properties of hierarchical SnS2 microspheres and their performances on photodegradation of high concentration Rhodamine B

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2021-06, Vol.415, p.113320, Article 113320
• Main Authors: Zai, Jiantao, Wei, Xiao, Sun, Minghe, Tian, Heng, Liu, Xuejiao, Qi, Rongrong, Qian, Xuefeng
• Format: Article
• Language: English
• Subjects: Hierarchical structures; Photocarrier; SnS2; Surface photovoltage
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2021.113320

[Display omitted] •The light response were extended by self-doping and surface states of SnS2.•Photocarrier dynamics of hierarchical SnS2 microspheres were studied.•The hierarchical SnS2 microspheres have enhanced photocatalytic activity to RhB. Heterogeneous photocatalysis has attracted considerable attention for environmental remediations, artificial photosynthesis, and the performance mainly depends on the light absorption, photocarrier dynamics and surface reactions of photocatalysts. Herein, the photocarrier dynamics of hierarchical SnS2 microspheres were studied by surface photovoltage and transient photovoltage spectra, in which the chemical composition, crystallinity, primary building blocks and assembling structures are affected by the light absorption and photocarrier transfer characteristics of SnS2. Further studies revealed that the enhanced visible light absorption and photocatalytic activity of Red-Embroidery-Ball-like microspheres were derived from the synergistic effects of S self-doping, the exciton transitions of surface states and the light trapping effects of porous hierarchical structure.