In dấu phân tử tạo ra hiệu ứng quang điện cao, tăng cường phân hủy quang xúc tác hiệu quả của axit salicylic bằng TiO2

Reaction Kinetics, Mechanisms and Catalysis - Tập 135 - Trang 529-537 - 2022
Xian Liu1,2,3, Chengxiang Xu1, Lei Zhu1, Xun Wang1
1School of Urban Construction, Wuhan University of Science and Technology, Wuhan, China
2School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, China
3State Environmental Protection Key Laboratory of Mineral and Metallurgical Resource Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan, China

Tóm tắt

Nghiên cứu đã chỉ ra rằng axit salicylic (SA) với vai trò là phân tử in dấu có thể tạo ra hiệu ứng quang xúc tác tốt hơn, trong khi đó, sự đóng góp của SA với vai trò là một in dấu phân tử và chất nền phân hủy vẫn chưa rõ ràng. Trong nghiên cứu này, SA-TiO2 đã được chuẩn bị bằng phương pháp in dấu phân tử một bước, sử dụng SA làm phân tử in dấu và tetra-n-butyl titanate làm tiền chất, được phân tích bằng các phương pháp XRD, UV-Vis, SEM, TEM-EDS, XPS, PL, FT-IR, EIS và phản ứng quang điện. Kết quả cho thấy rằng 1.5SA-TiO2 có đặc tính điện hóa tốt nhất và do đó có hiệu ứng quang điện tốt nhất. Hơn nữa, tỷ lệ tẩy màu của SA trong vòng 30 phút là 49,25% và 62,69% cho TiO2 và SA-TiO2, tương ứng, cho thấy SA-TiO2 tổng hợp có hiệu suất quang xúc tác tốt hơn và có thể được ứng dụng trong các kịch bản tương lai cho việc phân hủy hiệu quả nước thải từ SA.

Từ khóa

#axit salicylic #in dấu phân tử #quang xúc tác #TiO2 #tẩy màu

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