S-scheme Ti0.7Sn0.3O2/g-C3N4 heterojunction composite for enhanced photocatalytic pollutants degradation

• Published in: Journal of environmental chemical engineering 2022-04, Vol.10 (2), p.107118, Article 107118
• Main Authors: Guo, Bingrong, Liu, Bin, Wang, Chaoli, Wang, Yuhua, Yin, Shu, Javed, Muhammad Sufyan, Han, Weihua
• Format: Article
• Language: English
• Subjects: g-C3N4; Photocatalysis; pollutants degradation; S-scheme; Ti0.7Sn0.3O2
• ISSN: 2213-3437; 2213-3437
• DOI: 10.1016/j.jece.2021.107118

Herein we proposed a novel S-scheme Ti0.7Sn0.3O2/g-C3N4 heterojunction photocatalyst, which exhibited superior photocatalytic performance in contrast to the bare Ti0.7Sn0.3O2 and g-C3N4 under visible light. The optimized mass ratio of 10 wt% Ti0.7Sn0.3O2/g-C3N4 composite exhibits a favorable photocatalytic degradation capability of Rhodamine B (98.5%, 20 min) and tetracycline hydrochloride (88.3%, 40 min) in water, and exhibits excellent photocatalytic stability. The remarkable photocatalytic activity is attributed to the S-scheme between Ti0.7Sn0.3O2 and g-C3N4, which realizes effective separation and transfer to photo-generated charges. This work not only prepares a novel composite for photocatalytic pollutants degradation but also shows the significant role to photocarrier separation of S-scheme heterojunction structures. [Display omitted] •S-scheme Ti0.7Sn0.3O2/g-C3N4 heterojunction was successfully prepared.•The S-schemed structure is effective in photocarrier separation.•A favorable photocatalytic performance in degrading pollutants has been observed.