Preparing method for nitrogen mixed titania light catalyst

Abstract

The invention discloses a preparation method of a nitrogen-doped titanium dioxide photocatalyst, which is used in the technical field of semiconductor photocatalysis. The invention adopts a solid phase reaction method to replace some oxygen elements in titanium dioxide with nitrogen, uses urea as a nitrogen source, and reacts with titanium dioxide powder or its precursor to generate nitrogen-doped titanium dioxide photocatalyst. The invention uses urea as nitrogen source, has simple process and safe operation. The bandgap width of the titanium dioxide photocatalyst is reduced by nitrogen doping, it has the ability to absorb visible light, the photocatalytic activity is improved, and it can effectively degrade pollutants and produce hydrogen by photolysis of water.

Description

technical field

[0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a nitrogen-doped titanium dioxide photocatalyst. It is used in the technical field of semiconductor photocatalysis. Background technique

[0002] Photocatalysis is an emerging technology for environmental purification and energy conversion. Photocatalyst can effectively oxidize or reduce harmful gas molecules adsorbed on its surface, kill bacteria, inhibit viruses, and convert harmful organic matter and bacteria into harmless substances such as water and carbon dioxide without any secondary pollution; at the same time , the use of photocatalytic technology can be used to photolyze water to produce hydrogen, and directly convert solar energy into hydrogen energy.

[0003] A typical representative of a practical photocatalyst is titanium dioxide. Titanium dioxide has the ability to absorb ultraviolet rays with a wavelength of 400nm or below, and ...