Tourmaline TiO2 composite material preparation method

Abstract

The invention discloses a tourmaline TiO2 composite material preparation method, and belongs to the field of composite materials. The tourmaline TiO2 composite material preparation method comprises: mixing and uniformly stirring titanium tetraisopropanolate and ethanol according to a volume ratio of (3-4):10; uniformly dispersing tourmaline powder in a mixing solution comprising ethanol and water according to a volume ratio of 2:1 so as to make the mass fraction of the tourmaline is 5-9%; carrying out ultrasonic dispersion for 1 h with ultrasonic waves with a power of 100 W; mixing the tourmaline/ethanol/water solution and the titanium tetraisopropanolate/ethanol solution, and continuously stirring the sol mixture until generating a brown gel; transferring the brown gel mixture into a reaction kettle, carrying out a solvothermal reaction for 24 h at a temperature of 120 DEG C, and drying the wet gel after completing the reaction to obtain a dry gel, wherein the heating rate is 1 DEG C/min; and carrying out a heat treatment on the dry gel for 24 h at a temperature of 100 DEG C, and washing three times with distilled water at a room temperature to obtain the tourmaline TiO2 composite material. The prepared TiO2 composite photocatalyst of the present invention has advantages of low cost and no pollution, and can directly use solar energy to perform degradation.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a tourmaline TiO 2 composite material. Background technique [0002] The direct use of sunlight to achieve high-efficiency degradation of organic pollutants in water has always been a hot spot in the field of photocatalysis research. The development of semiconductor photocatalysts that can be directly excited by sunlight has become the research goal of many researchers. Due to low cost, high efficiency and no pollution, TiO 2 It has been considered as the most promising semiconductor photocatalytic material for market development. However, as a wide bandgap semiconductor, TiO 2 The band gap energy is relatively high, so it can only be excited by 3%-5% of the ultraviolet light in sunlight. In order to solve TiO 2 The photocatalytic activity under sunlight irradiation is low. In the prior art, the use of electron capture agents can effectively inhibit TiO 2 Recombination o...

AI Technical Summary

Problems solved by technology

However, these composite materials have the problems of high cost and high toxicity, and are not suitable for practical applications.