Visible light-ozone synergistic catalysis catalyst and preparation method thereof

A technology of synergistic catalysis and catalyst, applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve problems such as easy recombination of photogenerated electrons and holes, poor visible light response, and difficult recovery of powdered catalysts , to achieve rapid and efficient separation and recovery, high-efficiency recovery, excellent cycle stability and activity

Pending Publication Date: 2020-09-15
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to prepare a new photocatalyst material with visible light response, to solve the problems of poor visible light response of existing catalysts, easy recombination of photogenerated electrons and holes, difficult recovery of powdered catalysts, and low removal efficiency of organic matter in wastewater.

Method used

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  • Visible light-ozone synergistic catalysis catalyst and preparation method thereof
  • Visible light-ozone synergistic catalysis catalyst and preparation method thereof
  • Visible light-ozone synergistic catalysis catalyst and preparation method thereof

Examples

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Embodiment 1

[0031] Embodiment 1: visible light-ozone synergistic catalyst-10%rGH / ZnO-g-C 3 N 4 airgel (10% refers to ZnO-g-C 3 N 4 Mass fraction of rGH ) and its preparation method:

[0032] (1) Preparation of ZnO-g-C 3 N 4 : Weigh 5g of dicyandiamide and 0.5g of zinc nitrate into a 150ml beaker, add 100ml of distilled water, stir at 80°C for 1h, and then dry in an oven. Put the dried sample into a crucible, and carry out covered calcining in a tube furnace under a nitrogen atmosphere. The heating parameters are set as follows: from room temperature to 550°C, and the heating rate is 2°C·min -1 , keep a constant temperature of 550 ° C for 4 hours, and finally cool naturally, grind the calcined product carefully, and the obtained powder is ZnO-g-C 3 N 4 catalyst.

[0033] (2) Preparation of 10% rGH / ZnO-g-C 3 N 4 Airgel: Take 2g ZnO-g-C 3 N 4 Put the catalyst, 20ml GO solution, 0.6g ascorbic acid and 0.5ml polyethylene glycol into an agate jar, add agate beads, and ball mill a...

Embodiment 2

[0034] Embodiment 2: visible light-ozone synergistic catalyst-15%rGH / ZnO-g-C 3 N 4 airgel (15% refers to ZnO-g-C 3 N 4 Mass fraction of rGH ) and its preparation method:

[0035] (1) Preparation of ZnO-g-C 3 N 4 : Weigh 5g of dicyandiamide and 0.5g of zinc nitrate into a 150ml beaker, add 100ml of distilled water, stir at 80°C for 1h, and then dry in an oven. Put the dried sample into a crucible, and carry out covered calcining in a tube furnace under a nitrogen atmosphere. The heating parameters are set as follows: from room temperature to 550°C, and the heating rate is 2°C·min -1 , keep a constant temperature of 550 ° C for 4 hours, and finally cool naturally, grind the calcined product carefully, and the obtained powder is ZnO-g-C 3 N 4 catalyst.

[0036] (2) Preparation of 15% rGH / ZnO-g-C 3 N 4 Airgel: take 3g ZnO-g-C 3 N 4 Put the catalyst, 20ml GO solution, 0.6g ascorbic acid and 0.5ml polyethylene glycol into an agate jar, add agate beads, and ball mill a...

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Abstract

The invention discloses a preparation method of a catalyst for visible light-ozone synergistic catalysis and the catalyst prepared by the preparation method. The preparation method of the catalyst comprises the following steps of: preparing an active component ZnO-g-C3N4 and preparing the reduced graphene hybrid ZnO-g-C3N4 aerogel. By forming a Z-type heterojunction powder catalyst material ZnO-g-C3N4 from g-C3N4 and ZnO and loading the powder catalyst material ZnO-g-C3N4 onto a graphene gel framework with a three-dimensional structure, the obtained reduced graphene hybrid ZnO-g-C3N4 aerogel catalyst has excellent degradation efficiency on organic pollutants under visible light-ozone synergistic catalysis, and meanwhile, rapid and efficient separation and recovery of the catalyst are realized, so that the prepared catalyst has excellent cycling stability activity.

Description

technical field [0001] The invention relates to a preparation method of a visible light-ozone synergistic catalyst suitable for the treatment of high-salt wastewater in coal chemical industry, especially a visible light-ozone synergistic catalyst for the removal of refractory heterocyclic compounds in high-salt wastewater. The catalyst is a A "semiconductor-semiconductor / graphene" composite catalyst is used in the technical field of wastewater treatment and belongs to the field of industrial catalysis. Background technique [0002] In recent years, the degradation of refractory organic pollutants has attracted widespread attention because they have caused great harm to the natural environment and human health. In particular, the high-concentration brine produced by the coal chemical production process contains a large amount of refractory organic substances such as PAHs, heterocyclic compounds, etc. These substances usually have complex aromatic molecular structures, which m...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F1/72C02F1/78C02F101/30C02F101/34C02F101/36C02F103/34
CPCB01J27/24C02F1/30C02F1/725C02F1/78C02F2101/345C02F2101/36C02F2101/30C02F2103/34B01J35/23B01J35/61B01J35/39Y02W10/37
Inventor 马栋李兰廷李文博王吉坤高明龙刘敏陈贵锋
Owner CCTEG CHINA COAL RES INST
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