Inorganic Chemicals Industry >
Study on synthesis of FeWO4/WO3 complex by sol-gel and degradation of textile dye wastewater
Received date: 2021-08-23
Online published: 2022-06-15
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/WO3 composite 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
Zhi SONG , Boxia LIU , Yaoyao CHEN . 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 . DOI: 10.19964/j.issn.1006-4990.2021-0507
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