文献类型：期刊文献

英文题名：Enhanced photoreduction of U(VI) in solution by Ti 3 C 2 T x / g-C 3 N 4 composites

作者：Chen, Guohe[1];Cheng, Weidong[1];Wang, Yao[1];Luo, Can[2];Guo, Weijuan[1];Wang, Guofu[1,3];Qiu, Muqing[1]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Shaoxing 312000, Peoples R China;[2]Shaoxing Keqiao Jiangbin Water Treatment Co LTD, Shaoxing 312000, Peoples R China;[3]Shaoxing Univ, Yuanpei Coll, Sch Architectural Engn, Shaoxing 312000, Peoples R China

年份：2024

卷号：12

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001232393300004)、、EI(收录号：20241615931566)、Scopus(收录号：2-s2.0-85190327212)、WOS

语种：英文

外文关键词：U(VI); MXenes; Spectroscopic technique; Electronic structure

外文摘要：The enhanced transfer efficiency of electron from photocatalyst to U(VI) is crucial for U(VI) photoreduction. Herein, we developed porous 2D/2D Ti 3 C 2 T x /g-C 3 N 4 heterojunction structure through the pyrolysis gasification of urea during direct calculation of Ti 3 C 2 nanosheet and urea. Ti 3 C 2 T x /g-C 3 N 4 hybrid displayed the exceptional photocatalytic performance, high reaction rate constant (k 1 = 0.0228 min - 1 ) and rapid removal kinetics due to high photocatalytic activity, good chemical stability and highly efficient separation of photo -generated electronhole pairs. According to quenching experiments and ESR analysis, the superoxide ( . O 2 - ) radicals played an important role in U(VI) photoreduction by Ti 3 C 2 T x /g-C 3 N 4 . The higher efficient migration of photo -generated electrons from g-C 3 N 4 to Ti 3 C 2 co -catalyst was attributed to the tight interfacial interaction of - NH x of g-C 3 N 4 with Ti 3 C 2 via NH x -Ti chemical bonding, which increased the photoreduction of U(VI) into U(IV) by XPS analysis. The findings are crucial for designing g-C 3 N 4 -based catalysts by manipulating electronic structure for enhanced U(VI) photoreduction.