Heterogeneous photocatalytic treatment of wastewater in ultraviolet light irradiation—photocatalyst Bi<sub>2</sub>WO<sub>6</sub> microsphere with high repeatability

doi:10.1007/s12200-012-0291-9

Front Optoelec

2012, Vol. 5

Issue (4) : 439-444 https://doi.org/10.1007/s12200-012-0291-9

RESEARCH ARTICLE

Heterogeneous photocatalytic treatment of wastewater in ultraviolet light irradiation—photocatalyst Bi₂WO₆ microsphere with high repeatability

Xiaojing Lu, Yin PENG(

), Zhengzheng HAN

Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China

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Abstract

The treatment of wastewater that includes toxic organic pollutants such as dyes, phenoaniline, phenols and their derivatives is still a challenge due to their biorecalcitrant and acute toxicity to the widespread acceptance of water recycling. Three-dimensional (3D) Bi₂WO₆ microsphere was synthesized by the hydrothermal method using Bi(NO₃)₃ and Na₂WO₄ as raw materials. This structure exhibits high photocatalytic activity for the dyes, toxic organic compounds. The degradation of methlyene blue is 100% in 30 min, 4-nitrylphenol is 95% in 60 min and p-nitrylphenol is 95% in 75 min in ultraviolet (UV) light irradiation. 3D Bi₂WO₆ microsphere is also a good photocatalyst to treat the printing and dyeing sewage, and exhibits high repeatability. After being used the 20th time, Bi₂WO₆ still has high activity to degrade the printing and dyeing sewage, which is very important for a photocatalyst to be used in industry. This study will pave a new way to treat industry wastewater.

Keywords photocatalyst semiconductors wastewater treatment

Corresponding Author(s): PENG Yin,Email:kimipeng@mail.ahnu.edu.cn

Issue Date: 05 December 2012

Cite this article:

Xiaojing Lu,Yin PENG,Zhengzheng HAN. Heterogeneous photocatalytic treatment of wastewater in ultraviolet light irradiation—photocatalyst Bi₂WO₆ microsphere with high repeatability[J]. Front Optoelec, 2012, 5(4): 439-444.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-012-0291-9
https://academic.hep.com.cn/foe/EN/Y2012/V5/I4/439

Fig.1 SEM images (a)–(b) and XRD patterns (c) of BiWO samples

Fig.2 Photodegration efficiencies of dyes and toxic organic compounds as function of irradiation time by BiWO photocatalyst

Fig.3 Repeated photocatalytic experiments use BiWO to degraded MB dye under UV light

Tab.1 COD values of sewage with different reused times of BiWO sample

Tab.2 COD value of prior to treatment and post-treatment and light irradiation time for printing and dyeing sewages come from different wastewater treatment factories using BiWO as photocatalyst

Fig.4 Schematic diagram of principle of BiWO photocatalysis

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