Citation: Ji Mengxia, Zhang Zhiyong, Xia Jiexiang, Di Jun, Liu Yiling, Chen Rong, Yin Sheng, Zhang Sen, Li Huaming. Enhanced photocatalytic performance of carbon quantum dots/BiOBr composite and mechanism investigation[J]. Chinese Chemical Letters, ;2018, 29(6): 805-810. doi: 10.1016/j.cclet.2018.05.002 shu

Enhanced photocatalytic performance of carbon quantum dots/BiOBr composite and mechanism investigation

Ji Mengxia ^a ,
Zhang Zhiyong ^b ,
Xia Jiexiang ^a,c,, ,
Di Jun ^a ,
Liu Yiling ^a ,
Chen Rong ^a ,
Yin Sheng ^a ,
Zhang Sen ^b,, ,
Li Huaming ^a,,

a.
School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
b.
Department of Chemistry, University of Virginia, Charlottesville, VA 22904, United States
c.
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge 37830, United States

Corresponding author: Xia Jiexiang, xjx@ujs.edu.cn Zhang Sen, szhang@virginia.edu Li Huaming, lhm@ujs.edu.cn
Received Date: 1 March 2018
Revised Date: 25 April 2018
Accepted Date: 26 April 2018
Available Online: 4 June 2018

Figures(5)

Novel carbon quantum dots (CQDs)/BiOBr composite photocatalysts have been constructed through a facile hydrothermal synthesis in the presence of ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C₁₆mim]Br). Series of characterizations have been performed to confirm the uniform distribution of CQDs in BiOBr nanosheets and the synergistic effect for photocatalytic degradation organic pollutants between CQDs and BiOBr. The results show that 3.1 wt% CQDs/BiOBr photocatalyst possesses the best photocatalytic activity for the degradation of colorless antibiotic tetracycline (TC), endocrine disrupter bisphenol A (BPA) and dye rhodamine B (RhB), under visible light irradiation, which exhibited the highest photocatalytic performance. The enhanced photocatalytic performance for CQDs/BiOBr composites could be attributed to the wider optical absorption range and fast separation of photogenerated charge carriers after the introduction of CQDs. The key roles of CQDs for the enhanced photocatalytic activity of BiOBr have been discussed. A possible mechanism of CQDs/BiOBr on the enhancement of visible light performance was proposed.
- Photocatalysis,
- Ionic liquid,
- BiOBr,
- CQDs,
- Organic pollutants
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