Five-element co-doped nano-TiO2 modified purification suspension, preparation method and application

Abstract

The invention relates to a five-element co-doped nano-TiO2 modified purification suspension, a preparation method and an application. The suspension is prepared from the following raw material components in parts by weight: 150-250 parts of pure water, 50-90 parts of nano-TiO2 silver exchange liquid, 10-20 parts of stearic acid powder, 2-4 parts of CaCO3 powder, 5-10 parts of citric acid monohydrate powder, 1.6-5.2 parts of nano-CuO powder, 0.8-2.6 parts of nano-NiO powder, 0.3-0.8 parts of nano-ZnO powder and 0.5-4.2 parts of nano-Fe<3+> powder. The suspension is reasonable in design, catalyst activity and oxidant performance of the suspension are obviously improved, SO2, NH3, NOx, CO and VOCs can be effectively degraded and removed, more harmful chemical substances can be degraded and removed, and the light response range of TiO2 is expanded.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a five-element co-doped nano-titanium dioxide modified and purified suspension, a preparation method and an application. Background technique [0002] With the development of the world economy and the advancement of human science and technology, human demand and use of energy are increasing day by day, and the problems of energy shortage and environmental pollution are also becoming more and more serious. In 1972, Japanese scientists Fijishima and Honda found that when the TiO2 electrode was irradiated with light with a wavelength of less than 415nm, oxygen was released from the electrode. This important discovery has opened up a new way for people to study the photocatalytic activity of TiO2, thus laying the foundation for human development and utilization of solar energy. [0003] Although TiO2 photocatalytic technology has developed rapidly in recent decades, there are...

AI Technical Summary

Problems solved by technology

[0003] Although TiO2 photocatalytic technology has developed rapidly in recent decades, there are still some limitations. In the TiO2 photocatalytic technology, it has been greatly restricted and limited in practical applications.

First of all, TiO2 is a semiconductor oxide with a large band gap of about 3.2eV, which can only absorb visible light accounting for 4-5% of sunlight, which limits the utilization of solar energy by TiO2 photocatalysis technology; secondly, TiO2 light The catalyst is the recombination center of photogenerated holes and photogenerated electrons, and photogenerated carriers are easy to recombine together, which affects the activity of photocatalysts, which limits its practical application.

Since then, people began to study TiO 2 Research on the modification of photocatalytic materials, TiO 2 The dual-element doping is a recently explored way to improve TiO 2 The photocatalytic activity of the doping method, at present, especially with regard to TiO 2 The research on double-element doping has not been reported yet, and because the preparation process is complicated, the cost is high, and the liquid (suspension) after modification is not suitable as a coating material