A novel all-organic S-scheme heterojunction with rapid interfacial charges migration for efficient photocatalytic H_(2)production  

作　　者：Yajing Ren Yunfeng Li Guixu Pan Ning Wang Xianchun Liu Zhen Wu 

机构地区：[1]College of Environmental and Chemical Engineering,Key Laboratory of Functional Textile Material and Product of the Ministry of Education,Xi’an Polytechnic University,Xi’an 710048,China [2]Jilin Provincial Key Laboratory of Advanced Energy Materials,Department of Chemistry,Northeast Normal University,Changchun 130024,China [3]Department of Chemical Engineering,Ordos Institute of Technology,Ordos 017000,China

出　　处：《Journal of Materials Science & Technology》2024年第34期12-20,共9页材料科学技术(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.22008185 and 22008188);the Shaanxi Provincial Key Research and Development Program(No.2022GY-166);the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.22JK0406);the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.23JC033).

摘　　要：Poly(triazine imide),as a kind of highly crystalline g-C_(3)N_(4),exhibits a promising potential for photo-catalytic hydrogen production,however,some drawbacks still limit its photocatalytic performance.The strategy of constructing S-scheme heterojunction with different semiconductor photocatalysts enables the effective separation of photogenerated electrons and holes,and the strong oxidative and reductive properties of the original photocatalysts could be retained,which will significantly improve the photo-catalytic activity.In this work,we synthesized the organic-organic S-scheme heterojunction between PTI and organic small molecule poly(barbituric acid)(PBA)by hydrogen bond self-assembly method,which results in a significant enhancement of photocatalytic H_(2)production activity.The H_(2)production rate of the optimum PBA/PTI-2 sample under visible light irradiation is about 0.92 mmol g^(-1),which is 5.5 times higher than that of PTI and 14.4 times higher than that of PBA.This excellent photocatalytic performance is attributed to the successful construction of S-scheme heterojunction between PTI and PBA,which ef-fectively accelerates carrier transport and spatial segregation by the formation of a built-in electric field and band bending at the interface.In addition,the S-scheme heterojunction could also reserve the maxi-mum redox capability and enhance the light absorption of the prepared photocatalytic system.This work provides a new strategy and understanding for the design and development of organic-organic S-scheme heterojunction photocatalysts.

关 键 词：Photocatalysis Poly(triazine imide) Poly(barbituric acid) S-scheme heterojunction H_(2)production 

分 类 号：F42[经济管理—产业经济]