A bismuth iodide salt and its preparation method and application in fluorescence and photodegradation

Abstract

The invention belongs to the technical field of environmental protection functional materials, and specifically relates to a novel bismuth halide salt, which is a compound composed of hexaiodobismuth anion and benzylpyridinium cation. The preparation method comprises the following steps: taking a certain amount of benzyl bromide and pyridine, Add an appropriate amount of solvent to mix and dissolve, stir and reflux, then evaporate and concentrate, and then wash with ether to obtain benzylpyridinium bromide; take BiI 3 Dissolve in an appropriate amount of concentrated iodic acid, take a certain amount of benzylpyridinium bromide salt and dissolve it in an appropriate amount of solvent, mix and stir the two solutions to reflux to obtain a clear filtrate, and freeze and crystallize to obtain a new type of bismuth iodide salt. The novel bismuth halide of the invention emits strong orange-red light under the irradiation of 365nm ultraviolet light, rapidly degrades rhodamine B and methyl orange under visible light, and has good cycle degradation efficiency. The invention also provides a preparation method of the novel bismuth iodide salt, the method has high yield, saves cost, is easy to operate, and is beneficial to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of environmental protection functional materials, and in particular relates to a novel bismuth halide salt, that is, hexaiodobismuthic acid benzylpyridinium salt, its preparation method and its application in fluorescence and photodegradation. Background technique [0002] With the continuous advancement of industrialization and urbanization, pollution problems caused by waste gas, organic matter, polymers and biomass have become increasingly serious. Among them, some artificially synthesized organic pollutants have high toxicity despite their low concentration in the environment, so the removal of organic pollutants has also received extensive attention. In recent decades, technologies for the removal of organic dyes from wastewater have also been continuously developed, such as adsorption, photodegradation, biodegradation, and ozonation. Among them, photocatalytic technology can completely mineralize and ...

AI Technical Summary

Problems solved by technology

In recent years, the potential application of halobismuthates (III) as photocatalysts and optical materials has attracted widespread attention in the field of organic-inorganic hybrid compounds, but the existing halobismuthates still have a wide band gap, Low utilization rate of visible light, invisible under ultraviolet light, etc. need to be solved urgently to improve application value

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