Carbon Quantum Dots Modified BiOCl Ultrathin Nanosheets with Enhanced Molecular Oxygen Activation Ability for Broad Spectrum Photocatalytic Properties and Mechanism Insight

被引：383

作者：

Di, Jun ^{[1
]}

Xia, Jiexiang ^{[1
]}

Ji, Mengxia ^{[1
]}

Wang, Bin ^{[1
]}

Yin, Sheng ^{[1
]}

Zhang, Qi ^{[1
,3
]}

Chen, Zhigang ^{[2
]}

Li, Huaming ^{[1
]}

机构：

[1] Jiangsu Univ, Inst Energy Res, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China

[2] Jiangsu Univ, Sch Environm, Zhenjiang 212013, Peoples R China

[3] Hainan Univ, Hainan Prov Key Lab Fine Chem, Haikou 570228, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 36期

基金：

中国博士后科学基金;

关键词：

CQDs; BiOCl; ultrathin nanosheets; photocatalytic mechanism; REACTABLE IONIC LIQUID; POT SOLVOTHERMAL SYNTHESIS; ONE-STEP SYNTHESIS; HIGHLY EFFICIENT; COMPOSITES; TIO2; DEGRADATION; PERFORMANCE; HETEROSTRUCTURES; PHOTOREACTIVITY;

D O I：

10.1021/acsami.5b05268

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

In this paper, carbon quantum dots (CQDs) modified BiOCl ultrathin nanosheets photocatalyst was synthesized via a facile solvothermal method. The structures, morphologies, optical properties, and photocatalytic properties were investigated in detail. The photo catalytic activity of the obtained CQDs modified BiOCl ultrathin nanosheets photocatalyst was evaluated by the degradation of bisphenol A (BPA) and rhodamine B (RhB) under ultraviolet, visible, and nearinfrared light irradiation. The CQDs/BiOCl materials exhibited significantly enhanced photocatalytic performance as compared with pure BiOCl and the S wt % CQDs/BiOCl materials displayed the best performance, which showed a broad spectrum of photocatalytic degradation activity. The main active species were determined to be hole and O-2(center dot-) under visible light irradiation by electron spin resonance (ESR) analysis, XPS valence spectra, and free radicals trapping experiments. The crucial role of CQDs for the improved photocatalytic activity was mainly attributed to the superior electron transfer ability, enhanced light harvesting, and boosted catalytic active sites.

引用

页码：20111 / 20123

页数：13

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