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

ACS Applied Materials & Interfaces
Jun DiHuaming Li

Abstract

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 photocatalytic 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 near-infrared light irradiation. The CQDs/BiOCl materials exhibited significantly enhanced photocatalytic performance as compared with pure BiOCl and the 5 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 O2•- 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.

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Citations

Feb 5, 2016·Nanoscale Research Letters·Yuan ChenQinyi Wang
Jun 5, 2016·Talanta·Li-Ming Shen, Jing Liu
Sep 15, 2016·Advanced Materials·Huijun YuTierui Zhang
Apr 8, 2017·ACS Applied Materials & Interfaces·Yoon MyungParag Banerjee
May 19, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Zengyu YouHui Yang
Sep 30, 2017·Chemical Society Reviews·Rasel DasSeeram Ramakrishna
Feb 14, 2020·Nanomaterials·Shahin Homaeigohar
Jan 31, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Lianwei ShanZhidong Han
Feb 7, 2017·Chemical Communications : Chem Comm·Qing ChangShengliang Hu
Feb 8, 2020·ACS Applied Materials & Interfaces·Zhimin YangWenshou Wang

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