文献类型：期刊文献

英文题名：Carbon-dot-modified TiO2-x mesoporous single crystals with enhanced photocatalytic activity for degradation of phenol

作者：Zhang, Weiwei[3];Zhou, Yi[3];Dong, Chunyang[3];Shen, Bin[3];Xing, Mingyang[1,2];Zhang, Jinlong[1,2]

机构：[1]East China Univ Sci & Technol, Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2018

卷号：44

期号：8

起止页码：4797

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20180404668438);WOS:【SCI-EXPANDED(收录号:WOS:000439954400019)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21407049, 21377038, 21237003).

语种：英文

外文关键词：TiO2; CQDs; Vacuum activation; Ti3+ doped; Photocatalytic activity

摘要：We introduce a facile method to synthesize carbon quantum dots/titanium dioxide mesoporous single crystals (CQDs-MSCs). CQDs were synthesized using a pyrolysis method with citric acid as carbon precursor. V-CQDs-MSCs composite was prepared using a vacuum activation method and exhibited enhanced photocatalytic activity. The composites were characterized by diffuse reflectance spectroscopy (DRS), electron paramagnetic resonance (EPR), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) analysis, and thermogravimetry (TG) analysis. XPS results indicated that CQDs were bonded on the surface of MSCs by formation of Ti-O-C bonds, which played an important role in transfer of photogenerated electrons from Ti3+-TiO2 to CQDs. V-CQDs-MSCs obtained using CQD loading content of 2% and vacuum activation temperature of 600 degrees C showed the highest photocatalytic activity for degradation of phenol under simulated solar light irradiation.