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 a modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst, which comprises the following steps: the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst and organic pollutant wastewater or bacteria solution are mixed for photocatalytic treatment to finish the treatment of the organic pollutant or bacteria, the modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst is prepared by taking hollow tubular carbon nitride as a carrier and the carrier is loaded with modified carbon quantum dots, wherein the hollow tubular carbon nitride is prepared from urea and melamine in a molar ratio of 1-5:1 and melamine through hydrothermal treatment and calcination. The method has the advantages of simple process, convenient operation, simple equipment, low cost, high treatment efficiency / photocatalysis efficiency, good removal effect / sterilization effect, cleanness, no pollution and the like, 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...

AI Technical Summary

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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