FeWO4/WO3复合物的溶胶-凝胶合成及降解纺织染料废水研究

doi:10.19964/j.issn.1006-4990.2021-0507

Abstract

Abstract:

FeWO₄/WO₃ composite photocatalyst with high photocatalytic activity and special heterostructure was synthesized by one step sol-gel method using urea as fuel.X-ray powder diffraction and fourier transform infrared spectrum analysis showed that the FeWO₄/WO₃ composite photocatalyst did not contain any impurities，and only the diffraction peaks of FeWO₄ and WO₃ appeared in the sample.FeWO₄/WO₃ composite photocatalyst was composed of large rhomboid particles of FeWO₄ and small spherical particles of WO₃，which were coupled to form heterojunctions on（111） and（020） crystal planes.Compared with WO₃，FeWO₄/WO₃ composite photocatalyst had a wider spectral response range and a higher light absorption coefficient，which could respond to visible light.The effect of different dye concentrations，catalyst contents，pH values and dye types on the photocatalytic activity of FeWO₄/WO₃ composite photocatalyst was studied.When the dye concentration，catalyst content and pH value were 50 mg/L，1.5 g/L and 7，respectively，the degradation rate of FeWO₄/WO₃composite photocatalyst for the degradation of disperse orange textile dyes reached 97%.The FeWO₄/WO₃ composite photocatalyst showed selectivity in the degradation of dispersion black，dispersion blue，dispersion yellow and dispersion orange.Through the analysis of photocatalytic mechanism，it was found that the special heterojunction structure formed by the FeWO₄/WO₃ composite photocatalyst could accelerate the transfer and separation of charge carriers in the system，and then the photocatalytic activity of FeWO₄/WO₃ composite photocatalyst was improved.

Key words: sol-gel method, urea, photocatalyst, FeWO₄/WO₃, photocatalytic activity

CLC Number:

TQ136.13

SONG Zhi, LIU Boxia, CHEN Yaoyao. Study on synthesis of FeWO₄/WO₃ complex by sol-gel and degradation of textile dye wastewater[J]. Inorganic Chemicals Industry, 2022, 54(5): 131-137.

Figures/Tables 10

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Study on synthesis of FeWO₄/WO₃ complex by sol-gel and degradation of textile dye wastewater

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Study on synthesis of FeWO4/WO3 complex by sol-gel and degradation of textile dye wastewater