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Preparation method of polyacid intercalation 3D-LDHs photo-Fenton catalyst

A catalyst, acid intercalation technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve harsh preparation conditions, incomplete organic matter mineralization, etc. The problem is to achieve the effect of simple preparation method, improved light energy utilization rate, high mechanical strength and stability

Active Publication Date: 2019-08-02
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0013] The purpose of the present invention is to solve the harsh conditions for the preparation of existing photocatalytic materials, such as the need for nitrogen atmosphere protection and removal of CO 2 deionized water, and there is a technical problem of incomplete mineralization of organic matter in the process of removing organic pollutants, a preparation method of multi-acid intercalation 3D-LDHs photo-Fenton catalyst is provided

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  • Preparation method of polyacid intercalation 3D-LDHs photo-Fenton catalyst
  • Preparation method of polyacid intercalation 3D-LDHs photo-Fenton catalyst
  • Preparation method of polyacid intercalation 3D-LDHs photo-Fenton catalyst

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specific Embodiment approach 1

[0051] Specific embodiment 1: The preparation method of multi-acid intercalation binary 3D-LDHs photo-Fenton catalyst in this embodiment is carried out according to the following steps:

[0052] 1. Mix 12-18mmol Co(NO 3 ) 2 ·6H 2 O or Ni(NO 3 ) 2 ·6H 2 O, 6mmol Fe(NO 3 ) 3 9H 2 O, 42mmol urea, 0.2g NH 4 F and 0.2mol Tris solution, dissolved in 60mL organic solvent at room temperature and stirred for 2 hours, then transferred the solution into a 100mL autoclave, and sealed the autoclave at 120-150°C for 10-14 hours, using a membrane filter The gel was isolated by vacuum filtration, and the gel was redispersed in 100 mL of 0.5 mol / L Na2 CO 3 Stir in the solution for 1 hour, wash twice with deionized water and dry in an oven at 80-120°C for 10 hours to obtain the sample;

[0053] 2. Take the sample prepared in step 1 and disperse it in PMo with a concentration of 0.02-0.08mol / L according to the concentration of 2mg / mL 10 or CoW 12 solution, and then stirred at room te...

specific Embodiment approach 2

[0054] Embodiment 2: This embodiment is different from Embodiment 1 in that the organic solvent described in step 1 is anhydrous methanol, absolute ethanol or ethylene glycol. Others are the same as the first embodiment.

specific Embodiment approach 3

[0055] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that in step 1, the autoclave is sealed at 150° C. for 10 hours. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a polyacid intercalation 3D-LDHs photo-Fenton catalyst, belongs to the technical field of preparation of environment materials and aims to solve the technical problems that existing photocatalytic materials require harsh preparation conditions such as nitrogen atmosphere protection and CO2 removed deionized water and the mineralization degree of organic matter is incomplete in the organic pollutant removal process. The method comprises the steps as follows: Co(NO3)2.6H2O or Ni(NO3)2.6H2O,Fe(NO3)3.9H2O, urea, NH4F and a Tris solution are subjected to a reaction in an autoclave, obtained gel is re-dispersed in a Na2CO3 solution, and washing and drying are performed to obtain a sample;the prepared sample is dispersed in a PMo10 or CoW12 solution, and filtration, washing and drying are performed to obtain the catalyst. The catalyst prepared under the condition of no nitrogen protection and no CO2 removal has the degradation rates of 90% or above and mineralization rates of 73% or above for persistent organic pollutants including azo dyes (methylene blue and methyl orange) and 1-chloronaphthalene within 50 min under the synergistic effect of photocatalysis and Fenton catalytic oxidation.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, in particular to the preparation of a three-dimensional layered double metal hydroxide / polyoxometalate composite photo-Fenton catalyst. The invention belongs to the technical field of environmental material preparation. Background technique [0002] Fenton oxidation technology is a chemical method of wastewater treatment technology. Compared with physical methods and biological methods, its advantage is that during the Fenton oxidation process, strong oxidizing free radicals such as OH are generated, which breaks the chemical bonds of organic pollutants and eventually mineralizes them. for CO 2 、H 2 O and other inorganic small molecular substances meet the environmental protection requirements of "zero discharge" of wastewater. However, traditional Fenton technology has certain technical shortcomings and limitations in actual operation. In order to break through the bottleneck of trad...

Claims

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Application Information

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IPC IPC(8): B01J31/34B01J27/188B01J35/10C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J31/34B01J27/188C02F1/722C02F1/725C02F2101/34C02F2101/38C02F2101/36C02F2101/308C02F2305/10B01J35/39B01J35/61
Inventor 包思琪史钰淇张游山吴宜何龙杰
Owner CHANGCHUN UNIV OF SCI & TECH
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