TiO2 Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation

doi:10.12068/j.issn.1005-3026.2018.01.028

Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (1): 138-142.DOI: 10.12068/j.issn.1005-3026.2018.01.028

• Resources & Civil Engineering • Previous Articles Next Articles

TiO₂ Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation

JIANG Ting-ting¹， SHI Yong²， KE Jun^2,3， XU Kai-li¹

1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China； 2. School of Environment， Dalian University of Technology， Dalian 116024， China； 3. School of Chemistry and Environmental Engineering， Wuhan Institute of Technology， Wuhan 430074， China.

Received:2016-07-13 Revised:2016-07-13 Online:2018-01-15 Published:2018-01-31
Contact: SHI Yong
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Abstract

Abstract: The nanocomposite photocatalyst TiO₂ modified by carbon quantum dots(CQDs) was first prepared by sol-gel method and represented by fluorescence spectra， UV-vis absorption spectra， X-ray diffraction and scanning electron microscope. Then， the photocatalytic activity was investigated by degrading methylene blue(MB) in visible light. Results show that CQDs exhibits an upconversion fluorescence， meanwhile， the visible-light response of TiO₂ modified by CQDs was significantly improved. For the TiO₂/CQDs obtained by hydrothermal method under 180 ℃ lasting for 6h， when the doping amount is 10 mL， the photocatalytic activity is the highest. The degradation rate of MB comes to 80% after 115 min. The TiO₂/CQDs is mainly composed by anatase， whose particles take on a spherical shape with a specific surface area up to 200 m³·g^-1.

Key words: TiO₂, carbon quantum dots(CQDs), sol-gel method, photocatalytic degradation, methylene blue

CLC Number:

JIANG Ting-ting， SHI Yong， KE Jun， XU Kai-li. TiO₂ Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation[J]. Journal of Northeastern University Natural Science, 2018, 39(1): 138-142.

References

[1]刘立华，张连瑞.处理染料废水的研究进展［J］.化工科技市场，2005，28(11):20-23.(Liu Li-hua，Zhang Lian-rui.Prospect in treating methods of wastewater containing dyes［J］.Chemical Technology Market，2005，28(11):20-23.)
[2]刘冬妮，陈健波，郑铭.半导体光催化氧化技术的研究进展［J］.江苏大学学报(自然科学版)，2003，24(3):40-44.(Liu Dong-ni，Chen Jian-bo，Zheng Ming.Research and development of semiconductor photocatalytic oxidation technique［J］.Journal of Jiangsu University(Natural Science)，2003，24(3):40-44.)
[3]Li H T，He X D，Kang Z H，et al.Water-soluble fluorescent carbon quantum dots and photocatalyst design［J］. Angewandte Chemie International Edition，2010，122(1):4532-4536.
[4]Lim D H，Lee W J，Wheldon J，et al.Electrochemical characterization and durability of sputtered Pt catalysts on TiO₂ nanotube arrays as a cathode material for PEFCs［J］.Journal of the Electrochemical Society，2010，157(6):B862-B867.
[5]Xu Z H，Yu J G.A novel solid-state electrochemilumi-nescence sensor based on Ru(bpy)²⁺₃ immobilization on TiO₂ nanotube arrays and its application for detection of amines in water［J］.Nanotechnology，2010，21(24):245501.
[6]Zhang Y H，Xiao P，Zhou X Y，et al.Carbon monoxide annealed TiO₂ nanotube array electrodes for efficient biosensor applications［J］.Journal of Materials Chemistry，2009，19(7):948-953.
[7]Grtzel M.Photoelectrochemical cells［J］.Nature，2001，414(6861):338-344.
[8]周瑞琪，吕华，陈佳慧，等.碳量子点的合成、表征及应用［J］.药学进展，2013，37(1):24-30.(Zhou Rui-qi，Lyu Hua，Chen Jia-hui，et al.Synthesis， characterization and application of carbon quantum dots［J］.Progress in Pharmaceutical Science，2013，37(1):24-30.)
[9]Yu B Y，Kwak S Y.Carbon quantum dots embedded with mesoporous hematite nanospheres as efficient visible light-active photocatalysts［J］.Journal of Materials Chemistry，2012，22(17):8345-8353.
[10]Li Y S，Jiang F L，Xiao Q，et al.Enhanced photocatalytic activities of TiO₂ nanocomposites doped with water-soluble mercapto-capped CdTe quantum dots［J］.Applied Catalysis B:Environmental，2010，101(1):118-129.
[11]Zhuo S J，Shao M W，Lee S T.Up conversion and down conversion fluorescent graphene quantum dots:ultrasonic preparation and photocatalysis［J］.American Chemical Society Nano，2012，6(2):1059-1064.

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TiO₂ Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation

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