Study on the Photocatalytic Oxidation of Reactive Brilliant Blue X-BR with Lanthanum-Modified ZnO-TiO₂

Abstract:

The sol-gel method is adopted in this study to prepare the TiO₂-composite semiconductor materials doped with ZnO, whose crystal structures are characterized by way of X-ray diffraction and Transmission Electron Microscopy (TEM). It is concluded that the optimal doping amounts of Zn and lanthanum and the calcination temperature are respectively 3%, 0.3% and 500°C. Mixed with water, the photocatalytic oxidation effects of reactive brilliant blue X-BR, taken as the degradation target, was investigated in this study. When the doping amount of lanthanum is 0.3%, the chroma removal rate of the reactive brilliant blue X-BR by lanthanum-modified ZnO-TiO₂ can reach 97.3%. The conditions for optimal decolorization rate are: under ultraviolet light for 2h, using the 100mg / L reactive dyes, controlling pH at about 1 and the chloride concentration at 1mol / L.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 237-241
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.237
• Online since: January 2014
• Authors: Lei Zhu, Yang Fan Xiao, Xun Wang
• Keywords: Lanthanum, Photocatalytic Oxidation, Reactive Brilliant Blue X-Br, ZnO-TiO₂

References

[1] Xiong Wei, Wang Xun, The Application and Research Progress of Photocatalytic Oxidation Technology in Water Treatment[J], Shanxi Architecture, 2009. 35 (31): 182 -183.

[2] Su Min, Zhang Fang, Chen Yan Xia, et al., Inorganic Salts' Effects on the TiO2 Photocatalytic Degradation of Reactive Dyes [J], Printing and Dyeing, 2013. 8(2): 10 -13.

[3] Li FB, Li XZ, Hou MF, Photocatalytic Degradation of 2-mercaptobenzole in Aqueous La3+-TiO2 Suspension for Odor Control[J], Applied Catalysis B: Environmental, 2004. 48: 185-194.

DOI: 10.1016/j.apcatb.2003.10.003

[4] Cheng Gang, Zhou Xiaode, Preparation for the ZnO-TiO2 Composite Semiconductor and Its Photocatalytic Performance[J], Journal of Xi'an University of Technology, 2009. 25(1): 8 -11.

[5] Chen Fang, Yang Shui-jin, Study on the Process of TiO2's Photocatalytic Degradation for Reactive Dye Wastewater[J], Applied Chemical Industry, 2005. 34 (1): 9-11.

[6] Liu Hai, Wang Chaoxia, et al., TiO2-sol's Photocatalytic Degradation Activity on Reactive Brilliant Orange K-GN[J], Applied Chemical Industry, 2009. 38(2): 160-163.