Method for preparing carbon-doped titanium dioxide composite material and application thereof

Abstract

The invention discloses a method for preparing a carbon-doped titanium dioxide composite material, comprising the following steps of: fully mixing a TiCl3 solution at the mass concentration of 10%-20% and a sucrose solution at the mass concentration of 1%-10% according to the volume ratio of 1:1-6 with magnetically stirring; placing the mixed solution into a thermostat to perform a reaction at the temperature of 100-150 DEG C for 6-12 hours to hydrolyze TiCl3 and carbonize the sucrose to form an amorphous titanium dioxide-carbon composite material; washing the obtained substance with an organic solvent for 3 to 7 times, and washing with distilled water for 3 to 7 times, followed by drying; crushing the obtained substance, placing the ground substance into an activation furnace, adjusting the temperature to 400-700 DEG C at the heating rate of 3-5 DEG C / min under the protection of nitrogen, calcining at constant temperature for 2-6 hours to produce the needed product. According to the invention, titanium dioxide is embedded in translucent carbon films to form tiny briquettes, thus overcoming the shortcoming that nanometer TiO2 is not easy to settle in a water solution and is difficult to recycle.

Description

technical field [0001] The invention relates to a preparation method and application of a titanium dioxide material, in particular to a preparation method and application of a carbon-doped titanium dioxide composite material. Background technique [0002] In 1972, Fujishima and Honda first proposed titanium dioxide (TiO 2 ) electrode can photolyze water, thus opening the TiO 2 A new era in photocatalysis research. Numerous studies have shown that TiO 2 It is a photocatalyst with high efficiency, non-toxicity, stable chemical properties, strong photooxidation resistance and low price, especially in the application of toxic and biodegradable organic wastewater treatment, TiO 2 Photocatalytic technology has attracted extensive attention. [0003] Nano-TiO 2 Although it can effectively degrade various organic pollutants, its photocatalytic reaction needs to be carried out under ultraviolet light irradiation, and the separation rate of photogenerated electrons and holes stil...

AI Technical Summary

Problems solved by technology

There are many ways to prepare carbon-doped titanium dioxide that have been reported so far. For example, carbon-doped titanium dioxide can be prepared by hydrolyzing titanium alkoxide by sol-gel method, but the carbon content in the sample is not easy to control; Carbon-doped titanium dioxide was prepared by carbonizing metal Ti in an atmosphere containing C such as ethanol, and found that its repeatability was poor and the operation was inconvenient; carbon-doped titanium dioxide can be prepared by oxidizing TiC, but there are problems such as high raw material prices that lead to poor practicability, etc.

The titanium dioxide powder prepared by the above-mentioned various methods has a certain catalytic efficiency, but it is not easy to settle, it is difficult to recycle, and it is not conducive to the reuse of the catalyst. The problem has not been effectively solved, and the powder that is difficult to recycle will also cause certain damage to the environment. nanopollution

Therefore, looking for a way to prepare carbon-doped TiO 2 Composite catalysts, methods to solve the problems of difficult precipitation and difficult recovery in aqueous solution are imminent