Photocatalytic degradation of methyl orange using
ZnO/TiO composites

doi:10.1007/s11783-009-0035-2

Front.Environ.Sci.Eng.

2009, Vol. 3

Issue (3) : 271-280 https://doi.org/10.1007/s11783-009-0035-2

Research articles

Photocatalytic degradation of methyl orange using ZnO/TiO composites

Ming GE ¹, Changsheng GUO ¹, Xingwang ZHU ¹, Lili MA ¹, Wei HU ¹, Yuqiu WANG ¹, Zhenan HAN ²,

1.College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China；Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China; 2.School of Civil & Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore;

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Abstract ZnO/TiO₂ composites were synthesized by using the solvothermal method and ultrasonic precipitation followed by heat treatment in order to investigate their photocatalytic degradation of methyl orange (MO) in aqueous suspension under UV irradiation. The composition and surface structure of the catalyst were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and transmission electron microscopy (TEM). The degradation efficiencies of MO at various pH values were obtained. The highest degradation efficiencies were obtained before 30min and after 60min at pH 11.0 and pH 2.0, respectively. A sample analysis was conducted using liquid chromatography coupled with electrospray ionization ion-trap mass spectrometry. Six intermediates were found during the photocatalytic degradation process of quinonoid MO. The degradation pathway of quinonoid MO was also proposed.

Keywords photocatalytic degradation methyl orange ZnO/TiO₂ composites high performance liquid chromatography mass spectrometry (HPLC-MS)

Issue Date: 05 September 2009

Cite this article:

Ming GE,Wei HU,Changsheng GUO, et al. Photocatalytic degradation of methyl orange using ZnO/TiO composites[J]. Front.Environ.Sci.Eng., 2009, 3(3): 271-280.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-009-0035-2
https://academic.hep.com.cn/fese/EN/Y2009/V3/I3/271

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