Process for producing N doping TiO2

Abstract

The invention discloses a preparation method of N-doped TiO2 photocatalyst, comprising a plurality of steps as followings: firstly, weighing 0.2 to 2 milliliter HCl solution with a concentration of 37.5%, quickly adding the HCl solution into a mixed solution of tetrabutyl titanate and isopropanol while strenuously agitating the HCl solution, then strenuously agitating for 10 to 20 minutes at a constant temperature of 25 DEG C, then slowly dropping a deionized water solution dissolved with 10% to 60% urea to obtain a yellow transparent sol, standing for 5 to 30 minutes to form a milkiness translucent gel; secondly, hermetically aging the prepared gel for 5 days, drying the wet aged gel for 5 hours at a vacuum condition and a temprature of 65 DEG C to obtain loose tawny dry xerogel powder, then putting the powder into a muffle furnace and calcining for 2 hours to obtain the N-doped TiO2 photocatalyst. The invention is characterized in that urea is used as a nitrogen source to prepare nitrogen-doped TiO2 photocatalyst with an acid catalysis sol-gel method. The N-doped TiO2 photocatalyst prepared by the method has the advantages of good photocatalysis activity when excited by a visible light.

Description

technical field [0001] The invention relates to an N-doped TiO 2 Preparation method of photocatalyst. Background technique [0002] Nano-TiO 2 It has good performance as a photocatalyst. In recent years, nano-TiO 2 The research on semiconductor photocatalytic degradation of pollutants in water has become a hot spot in the field of environmental science, and is considered to be one of the most promising and effective treatment methods. But TiO 2 It has its own limitations: wide band gap (E g =3.0~3.2eV), its light absorption is only limited to the ultraviolet region, and the ultraviolet content in sunlight is less than 5%, so the utilization rate of solar energy is very low. Study shows that non-metallic doping is the extension of TiO 2 The spectral response range of photocatalysts and effective means to improve their catalytic efficiency, N-doped modified TiO 2 , is currently non-metal element doped modified TiO 2 One of the most studied elements. Currently, for Ti...

AI Technical Summary

Problems solved by technology

But TiO 2 It has its own limitations: wide band gap (E g =3.0~3.2eV), its light absorption is only limited to the ultraviolet region, and the ultraviolet content in sunlight is less than 5%, so the utilization rate of solar energy is very low