Organic wastewater treatment method based on multi-element co-doped TiO2 nano photocatalytic material

Abstract

The invention discloses an organic wastewater treatment method based on a multi-element co-doped TiO2 nano photocatalytic material, which comprises the following steps: preparing a sulfur-titanium dioxide mixture; carrying out a hydrothermal reaction on the sulfur-titanium dioxide mixture, copper chloride, ammonia, a strong base, a transition metal salt and the like; then reacting the reaction product with hydrofluoric acid; then carrying out temperature programming heat treatment in air to obtain a multi-element co-doped TiO2 nano photocatalytic material; and then treating organic wastewaterby using the multi-element co-doped TiO2 nano photocatalytic material under the irradiation of visible light. The organic wastewater treatment method provided by the invention is efficient, quick, safe and environment-friendly, various types of organic pollutants, ammonia nitrogen and the like can be thoroughly degraded, secondary pollution cannot be caused, the adopted multi-element co-doped TiO2nano photocatalytic material can be regenerated and recycled only by simple calcination, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of catalytic materials, in particular to a multi-element co-doped TiO 2 Organic wastewater treatment method of nano photocatalytic materials. Background technique [0002] The increasingly serious problem of environmental pollution and the outbreak of the energy crisis have attracted the attention of countries all over the world. Photocatalytic technology is expected to play a key role in solving environmental pollution and energy crisis, and currently attracts more and more scientific researchers to invest in related research. [0003] TiO 2 As an efficient and non-toxic photocatalyst, it has attracted much attention in the fields of wastewater treatment, air purification, antibacterial and other environmental protection. TiO 2 Photocatalysts are now known as "environmental catalysts". However, TiO 2 Some defects limit its practical process, such as wide band gap, can only absorb ultraviolet light to g...

AI Technical Summary

Problems solved by technology

However, in the doped titanium dioxide catalytic material prepared by the traditional method, the catalyst is easy to aggregate into large particles, the specific surface area is reduced, the photocatalytic activity is reduced, and the traditional preparation method is complicated to operate, the cycle is long, and the energy consumption is high.

At the same time, when using this kind of doped titanium dioxide catalytic material to treat organic wastewater, not only the efficiency is low, the degradation of organic pollutants is not complete, it is easy to cause secondary pollution, and the catalyst is easy to deactivate

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