Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to support hollow tubular carbon nitride photocatalyst

Abstract

The invention discloses a method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to load a hollow tubular carbon nitride photocatalyst. The method includes the following steps: loading the modified carbon quantum dots with a hollow tubular carbon nitride photocatalyst. Mix it with organic pollutant wastewater or bacterial solution for photocatalytic treatment to complete the treatment of organic pollutants or bacteria. The modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst uses hollow tubular carbon nitride as a carrier, on which Loaded with modified carbon quantum dots, the hollow tubular carbon nitride is prepared by hydrothermal treatment and calcination using urea and melamine with a molar ratio of 1 to 5:1 as raw materials. The method for treating organic pollutants and photocatalytic sterilization of the present invention has the advantages of simple process, convenient operation, simple equipment, low cost, high processing efficiency / high photocatalytic efficiency, good removal effect / good sterilization effect, clean and pollution-free, etc., and has high application value and commercial value.

Description

technical field [0001] The invention belongs to the field of visible light catalysis, and relates to a method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dots to load hollow tubular carbon nitride photocatalysts. Background technique [0002] The rapid growth of population and the rapid development of economy have led to an increasing demand for water resources. The resulting water pollution is a worldwide problem. Among them, the pollution of organic pollutants to the water environment has been widely concerned. , such as antibiotic wastewater as refractory wastewater, has been a research hotspot. Antibiotics are widely used in medicine and aquaculture because of their antibacterial, antifungal, antiviral, and antiparasitic properties. Tetracycline (TC), as a kind of antibiotic, is regarded as an essential drug by the World Health Organization (WHO). However, TC metabolism in animals is poor, resulting in a large amoun...

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Problems solved by technology

However, the existing carbon nitride photocatalysts with different morphologies still have disadvantages such as small specific surface area, few active sites, serious recombination of photogenerated carriers, poor light absorption ability, and low photocatalytic activity.

In addition, most of the existing carbon nitride photocatalyst preparation processes are template methods, and templates need to be removed during their synthesis, which is not conducive to improving the preparation efficiency, and leads to complex preparation processes, high preparation costs, and time-consuming At the same time, these synthesis processes require extensive use of various organic material additives or high-pressure conditions, where organic additives are usually difficult to completely remove, and their residual amount will not only affect the photocatalytic performance of carbon nitride photocatalysts, but these organic additives may also It has adverse effects on the environment, and the existence of these problems severely limits the wide application of carbon nitride photocatalysts.

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