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mqds/ncds/tio 2 Composite material, composite catalytic system and method for improving degradation efficiency of organic pollutants

A technology of organic pollutants and composite materials, applied in the field of photocatalysts, can solve problems such as easy recombination, and achieve the effects of promoting degradation, efficient separation and transfer efficiency, and excellent photocatalytic performance.

Active Publication Date: 2021-06-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has defects, such as: a wide band gap (3.0-3.2eV), so that it can only respond to ultraviolet light; photogenerated electron-hole pairs are easy to recombine

Method used

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  • mqds/ncds/tio <sub>2</sub> Composite material, composite catalytic system and method for improving degradation efficiency of organic pollutants
  • mqds/ncds/tio <sub>2</sub> Composite material, composite catalytic system and method for improving degradation efficiency of organic pollutants
  • mqds/ncds/tio <sub>2</sub> Composite material, composite catalytic system and method for improving degradation efficiency of organic pollutants

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Synthetic TiO 2 Nanosheets

[0038] Add 35 ml of TBOT and 2 ml of HF into a polytetrafluoroethylene-lined autoclave and heat at 200 °C for 18 hours. After cooling to room temperature, washing with deionized water and absolute ethanol several times, and drying at 60 °C for 12 h, TiO 2 Nanosheets.

Embodiment 2

[0039] Embodiment 2: Synthesis of NCDs / TiO 2

[0040] 0.5g TiO 2 The nanosheets were dispersed in 50ml of deionized water, then 1g of citric acid and 0.3g of urea were added to the solution, and after 1h of ultrasonic and stirring, they were transferred to a high-pressure hydrothermal reactor containing a polytetrafluoroethylene liner, and Heated at 160°C for 5 hours. After cooling to room temperature, washing with deionized water several times, and drying at 60 °C for 12 h, nitrogen-doped carbon dots (NCDs) supported on TiO were obtained. 2 Nanosheet NCDs / TiO 2 Material.

Embodiment 3

[0041] Embodiment 3: Synthesis of NCDs / TiO 2

[0042] 0.5g TiO 2 The nanosheets were dispersed in 50ml of deionized water, then 1.2g of citric acid and 0.5g of urea were added to the solution, and after 1h of ultrasonic and stirring, they were transferred to a high-pressure hydrothermal reactor with a polytetrafluoroethylene liner. and heated at 170° C. for 4 hours. After cooling to room temperature, washing with deionized water several times, and drying at 60 °C for 12 h, nitrogen-doped carbon dots (NCDs) supported on TiO were obtained. 2 Nanosheet NCDs / TiO 2 Material.

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Abstract

The invention discloses a kind of MQDs / NCDs / TiO 2 Composite materials, the MQDs / NCDs / TiO 2 The composite material is made of TiO 2 nanosheets, supported on the TiO 2 Nitrogen-doped carbon quantum dots and molybdenum disulfide quantum dots on nanosheets. The invention also discloses that the MQDs / NCDs / TiO 2 A composite catalytic system composed of a composite material and persulfate and a method for improving the degradation efficiency of organic pollutants. MQDs / NCDs / TiO of the present invention 2 Composite materials, solved TiO 2 The defect of low utilization rate of visible light realizes efficient photogenerated electron-hole separation and transfer efficiency, and the composite catalytic system composed of the composite material and persulfate can produce synergistic catalytic effect, which further promotes the removal of organic pollutants. degradation.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a MQDs / NCDs / TiO 2 Composite materials, consisting of MQDs / NCDs / TiO 2 A composite catalytic system composed of a composite material and persulfate, and a method for improving the degradation efficiency of organic pollutants. Background technique [0002] With the accelerated development of economy and industrialization, industrial waste pollutants are increasingly polluting the water environment, affecting human health and the normal life of aquatic organisms. Advanced oxidation technology is an effective method for treating organic pollutants, in which sulfate radicals (SO 4 ·- ) advanced oxidation technology is a very potential technology developed in recent years. It mainly generates sulfate radicals by activating persulfate or permonosulfate, and then oxidizes and degrades pollutants. The application of photocatalytically activated persulfate for the degradation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/051B01J21/06B01J27/053B01J27/055C02F1/30B82Y30/00B82Y40/00C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J27/051B01J21/063B01J27/053B01J27/055C02F1/30B82Y30/00B82Y40/00C02F2101/30C02F2101/34C02F2101/38C02F2101/308C02F2305/10C02F2101/36C02F2101/40B01J35/39
Inventor 刘湘张倩赵芳夏咏梅王海军
Owner JIANGNAN UNIV