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Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst

A technology of organic pollutants and carbon quantum dots, applied in chemical instruments and methods, physical/chemical process catalysts, water pollutants, etc., can solve problems such as adverse environmental effects, low photocatalytic activity, and poor light absorption ability, and achieve high Application value and commercial value, high photocatalytic efficiency, good removal effect

Active Publication Date: 2019-04-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst
  • Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst
  • Method for treating organic pollutants and photocatalytic sterilization by using modified carbon quantum dot loaded hollow tubular carbon nitride photocatalyst

Examples

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Embodiment 1

[0057] A method for treating organic pollutants by using a modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst, specifically using a modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst to treat tetracycline wastewater, comprising the following steps:

[0058] Weigh modified carbon quantum dot-supported hollow tubular carbon nitride photocatalysts (HTCN-C0.5, HTCN-C1, HTCN-C2, HTCN-C3), each 30mg, add to 30mL tetracycline with a concentration of 20mg / L In the wastewater, stir magnetically for 1 hour in the dark at a rotational speed of 400 r / min. After reaching adsorption equilibrium, turn on the light source (300W xenon lamp), and perform photocatalytic reaction under simulated sunlight for 1 hour to complete the degradation of tetracycline.

[0059] In this example, the modified carbon quantum dot-supported hollow tubular carbon nitride photocatalyst (HTCN-C0.5) was used as a carrier, and the hollow tubular carbon nitride w...

Embodiment 3

[0080] A method for photocatalytic sterilization of bacteria using a modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst, specifically treating Escherichia coli with a modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst, comprising the following steps:

[0081] Weigh 30 mg of the modified carbon quantum dot-loaded hollow tubular carbon nitride photocatalyst (HTCN-C2) prepared in Example 1, add it to 49.5 mL of sterile water, add 0.5 mL, the concentration is 30 mL, and the concentration is 3× 10 9 CFU / mL E. coli solution, at this time the concentration of E. coli in the system was diluted to 3×10 7 CFU / mL, turn on the light source (300W xenon lamp), irradiate under simulated sunlight to carry out photocatalytic sterilization reaction for 1 hour, and complete the inactivation of Escherichia coli.

[0082] Take 100uL of reaction liquid every 15 minutes, then dilute these bacterial liquids appropriately, and finally use the pl...

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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...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J35/02C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J27/24C02F2305/10C02F2101/36C02F2101/34C02F2101/40C02F2101/38B01J35/00B01J35/30B01J35/39
Inventor 汪文军曾光明张辰周成赟杨洋黄丹莲程敏王晗陈莎熊炜平姜丹妮李志豪王紫薇张明明
Owner HUNAN UNIV
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