文献类型：期刊文献

英文题名：Atmosphere engineering of metal-free Te/C3N4 p-n heterojunction for nearly 100% photocatalytic converting CO2 to CO

作者：Liao, Huange[1];Huang, Kai[2,3];Hou, Weidong[1];Guo, Huazhang[1];Lian, Cheng[2,3];Zhang, Jiye[4];Liu, Zheng[5];Wang, Liang[1]

机构：[1]Shanghai Univ, Inst Nanochem & Nanobiol, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[4]Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China;[5]Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore

年份：2024

卷号：3

期号：6

外文期刊名：ADVANCED POWDER MATERIALS

收录：EI(收录号：20244217208649);WOS:【ESCI(收录号:WOS:001359068700001)】；

基金：The project was funded by China Postdoctoral Science Foundation (2023T160406) and Shanghai Pujiang Program (21PJD022) . This project was also supported by Singapore Ministry of Education AcRF Tier 2 (MOE-MOET2EP10121-0006) and AcRF Tier 1 (RG7/21) . This work is Supported by Shanghai Technical Service Center of Science and Engineering Computing, Shanghai University.

语种：英文

外文关键词：p-n heterojunction; Carbon nitride; Built-in electric field; Photocatalytic carbon dioxide reduction; Heterojunction photocatalysts

摘要：Carbon nitride (CN)-based heterojunction photocatalysts hold promise for efficient carbon dioxide (CO2) reduction. However, suboptimal production yields and limited selectivity in CO2 conversion pose significant barriers to achieving efficient CO2 conversion. Here, we present the construction of a p-n heterojunction between ultrasmall Te NPs and CN nanosheet using a novel tandem hydrothermal-calcination synthesis strategy. Through ammonia-assisted calcination, ultrasmall Te NPs are grown in-situ on the CN nanosheets' surface, resulting in the generation of a robust p-n heterojunction. The synthesized heterojunction exhibits increased specific surface area, reinforced visible light absorption, intensive CO2 adsorption capacity, and efficient charge transfer. The optimum Te/CN-NH3 demonstrates superior photocatalytic CO2 reduction activity and durability, with nearly 100 % selectivity for CO and a yield as high as 92.0 mu mol g(-1) h(-1), a fourfold increase compared to pure CN. Experimental and theoretical calculations unravel that the strong built-in electric field of the Te/CN-NH3 p-n heterojunction accelerates the migration of photogenerated electrons from Te NPs to the N site on CN nanosheets, thereby promoting CO2 reduction. This study provides a promising material design approach for the construction of highperformance p-n heterojunction photocatalysts.