A kind of Z type photocatalyst and preparation method thereof

Abstract

The invention relates to the technical field of photocatalysis, in particular to a preparation method of a photocatalyst. The preparation method comprises the following steps of mixing a titanium precursor, alcohol solvent, acid, ferric ion, and g-carbon nitride into a mixture in proportion, wherein the mass ratio of g-carbon nitride and titanium precursor is 1:(100-1000); the volume ratio of titanium precursor, alcohol solvent and acid is (5-20):(100-200):(0.3-70); the molar ratio of ferric ion and titanium precursor is (0.1-5):100; putting the mixture into a high-pressure kettle, reacting for 2-4h at the temperature of 160-240 DEG C, cooling to room temperature, and obtaining alcohol dispersing liquid of the photocatalyst; centrifuging and separating the alcohol dispersing liquid, washing, and drying, so as to obtain the photocatalyst. The prepared g-C3N4 / Fe-TiP2 photocatalyst has the advantages that the good organic pollutant degrading function is realized under irradiate of visible light, and the application prospect is broad in the fields of water treatment, air purification, sterilization and disinfection.

Description

technical field [0001] The invention relates to the technical field of nanometer photocatalytic materials, in particular to g-carbon nitride composite iron-doped titanium dioxide (g-C 3 N 4 / Fe-TiO 2 ) and its preparation method. Background technique [0002] Titanium dioxide (TiO2) was discovered by Fujishima and Honda in 1972 2 ) Since the photo-splitting of water on the electrode (Nature, 1972, 238 (5358): 37-39), semiconductor photocatalysis technology has entered a new stage. Among many photocatalysts, TiO 2 Because of its advantages of stability, non-toxicity, no secondary pollution, light corrosion resistance, high photocatalytic activity and low preparation cost, it has become the most widely used photocatalyst in environmental governance, dye-sensitized solar cells, and water photolysis for hydrogen production. and CO 2 Areas such as reduction play a crucial role. [0003] TiO 2 The main disadvantage is that the band gap (3.2eV for anatase and brookite, 3.0e...

AI Technical Summary

Problems solved by technology

However, traditional TiO 2 Based visible photocatalysts, such as N-doped TiO 2 , there are still problems such as low quantum efficiency, low reduction ability and low mobility of photogenerated holes caused by high photogenerated electron-hole recombination rate.

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