Low-temperature preparation method of titanium dioxide photocatalyst co-doped with carbon, nitrogen and sulphur

Abstract

The invention discloses a low-temperature preparation method of a photocatalyst codoping titanium dioxide, carbon, nitrogen and sulfur. The method is characterized in that an inorganic titanium compound is taken as a precursor and the biomolecular amino acid is taken as a dopant so as to carry out hydrothermal reaction at a lower temperature, and the product thus obtained is the titanium dioxide codoping carbon, nitrogen and sulfur; compared with the undoped titanium dioxide, the band-gap energy of the titanium dioxide becomes narrower owing to the synergetic action among the carbon, the nitrogen and the sulfur, therefore, the response to visible light is enhanced and the activity under visible light is obviously improved, particularly, the photocatalyst has high activity in gas phase degradation; and the photocatalyst has the advantages of simple preparation process, mild conditions and good repeatability, and can be applied to the fields of environmental science and engineering.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes how certain types of materials like TiO2 or other metal oxides have been used to make better catalysts that remove harmful gases from indoor environments such as buildings' walls during construction work hours by generating radical species on their surface called oxygen atoms (OH). These techniques help create more effective chemical reactions at lower temperatures while also improving absorption efficiency when exposed to solar radiation. Additionally, these technologies allow for efficient use of natural resources without causing environmental damage through emissions into the environment caused by volatile organics released over long periods of times after they were manufactured.

Problems solved by technology

Technological Problem: Current techniques for modifying titanooxysulfate nanosheets involve adding different types of atoms called donbons to increase their ability to absorb UV rays while maintaining chemical reactivity. These modifications result from changes made during manufacturing processes like decomposition reactions, impurity incorporations, crystal growth issues, and instability caused by temperature fluctuations. Additionally, current methods require expensive equipment and complicated procedures involving multiple steps, leading to potential contaminating effects.

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