文献类型：期刊文献

英文题名：Solvothermal synthesis of g-C3N4 nanosheets modified carbon quantum dots for enhanced photocatalytic degradation

作者：Wang, Linxia[1];Lu, Yining[1];Xu, Jingjing[1];Tao, Feifei[1,2];Liang, Pengfei[1]

机构：[1]Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

年份：2023

卷号：143

外文期刊名：SOLID STATE SCIENCES

收录：SCI-EXPANDED(收录号：WOS:001053206600001)、、EI(收录号：20233214488527)、Scopus(收录号：2-s2.0-85166469764)、WOS

基金：This work was supported by National Natural Science Foundation of China (NSFC, grant No. 51372154 and 20901051) , Zhejiang Provincial Natural Science Foundation of China under Grant No. LY21B010005 and the Project of Shaoxing University (No. 2022LG003) . The authors thank Yongwei Li from Department of Chemistry and Chemical Engineering, Shaoxing University for the help in the synthesis of the photocatalysts.

语种：英文

外文关键词：Carbon quantum dots (CQDs); Graphite-like carbon nitride (g-C3N4); Visible-light-responsive photocatalysis

外文摘要：The incorrect disposal of industrial waste water has caused widespread concern of researchers due to its serious harm to people's health and ecological environment. Photocatalytic technology is widely used for wastewater purification owing to its simple operation, no secondary pollution and clean energy. In this study, carbonaceous composites were constructed by combining graphite-phase carbon nitride (g-C3N4) nanosheets with carbon quantum dots (CQDs) via hydrothermal method. The size of CQDs was about 8 nm, distributing over the surface of g-C3N4 nanosheets, and the existence of their interface interaction was confirmed. The photocatalytic degradation of methyl orange (MO) is considered to appraise the photocatalytic performance of the g-C3N4/CQDs composites under visible light. The obtained composites display better photocatalytic activity than the pure g-C3N4 nanosheets. The obtained g-C3N4/CQDs composite (CN-20) from 20 mL of the CQDs solution (similar to 1 mg mL(-1)) and 20 mg of g-C3N4 nanosheets displays the excellent photo-degradation efficiency and its apparent rate con-stant (kapp) is 4.0 times that of g-C3N4 nanosheets. In addition, CN-20 exhibits almost negligible influences of real environmental (pH value, inorganic anions, humic acid and source of water) on the degradation of MO, indi-cating potential in practical application. Furthermore, the g-C3N4/CQDs composite shows the enhanced cycle stability and the postulated mechanism of MO photocatalytic degradation is illustrated in detail.