Preparation for pyro-vanadic acid zinc hollow microsphere and application thereof

Abstract

A preparation method for pyro-vanadic acid zinc hollow microsphere comprises the following specific steps of respectively weighting zinc oxide, vanadium oxide, ethylenediamine tetraacetic acid and polyethylene glycol according to weight ratio of (4-6.6):(10-12.6):(1.2-1.6):1; adding the raw material into distilled water of the same weight of 40-50 parts of zinc oxide, stirring at room temperature, thus obtaining mixed liquor after ultrasound; putting the mixed liquor into a self-generated pressure hydrothermal reaction kettle, carrying out constant temperature hydrothermal reaction for 10-15 hours at 160-170 DEG C, then naturally cooling down to room temperature, finally filtering, washing, and drying substrate at the bottom of the kettle so as to obtain breen pyro-vanadic acid zinc hollow microsphere powder for sewage treatment. The preparation method has no secondary pollution and has low raw material cost, the defect of the TiO2 taken as traditional photocatalyst in practical application of sewage purification is effectively overcome by the pyro-vanadic acid zinc hollow microsphere as the photocatalyst, the whole process of the method is simple, the manufacture cost is lower, the method has high feasibility, and is applicable to industrialized mass production of photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of engineering materials and nanometer materials, in particular to a preparation method and application of zinc pyrovanadate hollow microspheres. Background technique [0002] Traditional Nano TiO 2 The high charge recombination rate and wide bandgap (3.2eV) of photocatalysts lead to low conversion efficiency of visible light, which limits its practical application. Nano TiO 2 Visible photosynthetic studies of photocatalysts mainly focus on doping (metal ions and non-metals), dye photosensitization, semiconductor recombination, etc., while making encouraging preliminary research progress, there are still some problems: It can enhance its extension and absorption intensity in the visible light range, but after doping TiO 2 The problem of poor thermal stability is common, and its photocatalytic activity is restricted by various factors such as the type, concentration, preparation method, and post-treatmen...

AI Technical Summary

Problems solved by technology

[0002] Traditional Nano TiO 2 Photocatalysts have a high charge recombination rate and a wide bandgap (3.2eV), resulting in low conversion efficiency of visible light, which limits their practical applications.

Nano TiO 2 Visible photosynthetic studies of photocatalysts mainly focus on doping (metal ions and non-metals), dye photosensitization, semiconductor recombination, etc., while making encouraging preliminary research progress, there are still some problems: It can enhance its extension and absorption intensity in the visible light range, but after doping TiO 2 The problem of poor thermal stability is common, and its photocatalytic activity is restricted by various factors such as the type, concentration, preparation method, and post-treatment method of dopant ions; most catalysts prepared by dye photosensitization, semiconductor recombination, etc. , Poor shape controllability, various defects in the bulk phase or surface of the material that lead to the recombination of photogenerated carriers, and the phenomenon of "bleaching" due to the instability of the material during the photocatalytic degradation of organic matter

[0005] Zinc pyrovanadate hollow microspheres have no relevant literature reports