Asymmetric Structure Awakened n-π*Electron Transition in Sulfur and Selenium Co-doped g-C_(3)N_(4) with Efficient Photocatalytic Performance  

作　　者：Tian Liu Yunfeng Li Hejia Sun Min Zhang Zhiling Xia Qing Yang 

机构地区：[1]College of Environmental and Chemical Engineering,Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries,Xi’an Polytechnic University,Xi’an 710000,China [2]College of Physical Education,Xi’an Polytechnic University,Xi’an 710000,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第6期55-61,共7页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China(22008185);Shaanxi Provincial Key Research and Development Program(2022GY-166);Scientific Research Program Funded by Shaanxi Provincial Education Department(19JK0376)。

摘　　要：Sulfur and selenium co-doped graphitic carbon nitride(SSCN)with efficient photocatalytic activity was synthesized by synchronously introducing sulfur and selenium atoms into the melon structure of g-C_(3)N_(4)(GCN)via a facile solid-phase thermal reaction of GCN and SeS_(2).The as-prepared SSCN possesses a larger specific surface area with a richer pore structure that provides more active centers for catalytic reaction.More importantly,the asymmetric structure of SSCN due to introducing sulfur and selenium not only maintains an easier activation ofπ-π*electron transition but also awakens the n-π*electron transition in g-C_(3)N_(4).Moreover,the n-π*electron transition of SSCN can be controlled through changing the amount of SeS_(2),which can greatly extend the photo-response range to 600 nm.As a result,the SSCN samples show an excellent photo-degradation performance for typical antibiotic of tetracycline hydrochloride(TC).The specific degradation route and main intermediates of TC based on liquid chromatograph mass spectrometer(LC-MS)analysis are also investigated and discussed.

关 键 词：photocatalysis CO-DOPING n-π*transition charges transfer PHOTO-DEGRADATION 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]