Iron sodium bismuthate-graphene visible-light-driven Fenton-like composite catalyst used for removing nonyl phenol and preparation method thereof

Abstract

The invention provides an iron sodium bismuthate-graphene visible-light-driven Fenton-like composite catalyst used for removing nonyl phenol and a preparation method thereof. The composite catalyst is characterized in that the composite catalyst is prepared by compounding iron sodium bismuthate and graphene, wherein the mass content of iron sodium bismuthate FexNayBiO3 is 90 to 99.5% while the mass content of graphene is 10 to 0.5%. According to the invention, NaBiO3 (sodium bismuthate) is used as a basic catalyst and elemental Fe is doped to endow the basic catalyst with Fenton-like catalysis performance, so a nanometer catalyst, i.e., iron sodium bismuthate, with both visible-light-driven and Fenton-like catalysis performance is prepared; and then iron sodium bismuthate is loaded on micrometer graphene oxide, and graphene oxide in the compound is reduced into graphene through a hot reduction method so as to obtain the final product, i.e., the iron sodium bismuthate-graphene visible-light-driven Fenton-like composite catalyst. Under irradiation by visible light, nanometer FexNayBiO3 produces strong-oxidability substances like hydroxyl radicals under photocatalysis; graphene can improve affinity between the catalyst and a substrate, substantially strengthen adsorption of NP and enhance interfacial reaction capability in virtue of pi-pi interaction and hydrophobic action force, and graphene has excellent electron transport performance, which can promote separation and transfer of photogenerated holes and electrons on a heterophase boundary and further improve NP oxydative degradation capability.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to using sodium iron bismuthate-graphene composite as adsorption and catalyst in the treatment process of phenolic pollutants containing nonylphenol and utilizing the strong selectivity of the composite material Adsorption and catalytic performance, adsorption and catalytic oxidation degradation of nonylphenol, finally achieve the purpose of removing and degrading nonylphenol, and realize the advanced treatment of wastewater containing nonylphenol pollutants. Background technique [0002] In recent decades, environmental hormone pollution and its ecological effects have attracted widespread attention from the international community. We have noticed that as an important raw material and intermediate of fine chemicals, nonylphenol (Nonylphenol, NP) has estrogen-like activity, interferes with the endocrine system, reproductive system, growth and immune system of humans and anima...

AI Technical Summary

Problems solved by technology

However, the existing visible light photocatalytic system still has the following problems: ①The catalytic activity of the catalyst itself is not high enough (only 50% of nonylphenol can be removed), and it is difficult to generate enough oxidation active species in a short time to achieve efficient degradation and mineralization of NP. ②Because NP is a strong hydrophobic substance, it is difficult to effectively adsorb on the hydrophilic surface of the catalyst, which seriously restricts its contact with oxidation active species, resulting in low NP degradation efficiency

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