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Nanocomposite heterogeneous photo-Fenton catalyst and preparation method and application thereof

A nano-composite material and catalyst technology, applied in the direction of heterogeneous catalyst chemical elements, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Uniformity and other problems, to achieve the effect of low price, overcoming loss, and high catalytic activity

Active Publication Date: 2018-12-14
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The study found that the force between the metal and the support is weak, and when the catalyst is prepared by loading highly active and not easy to lose metal particles, the metal active components are unevenly distributed on the surface

Method used

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  • Nanocomposite heterogeneous photo-Fenton catalyst and preparation method and application thereof
  • Nanocomposite heterogeneous photo-Fenton catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] ①Dry the sludge from the urban domestic sewage treatment plant at 120°C for 12 hours, then pulverize it, and sieve it through a 50-mesh sieve to obtain a sludge powder sample that passes through the sieve. Calcined at 500° C. for 4 hours under the condition of feeding air, and after cooling to room temperature, the sludge catalyst carrier was obtained.

[0034] ②Weigh 0.898gFe(NO 3 ) 3 9H 2 O, 0.067g InN 3 o 9 ·xH 2 O was added to 50mL deionized water (Fe(NO 3 ) 3 9H 2 O and InN 3 o 9 ·xH 2 (2 molar ratio is 10:1), in above-mentioned solution, add cetyltrimethylammonium bromide (CTAB) 0.1g, after magnetic stirring makes it mix uniformly, react under microwave radiation condition, temperature is 100 ℃, The power is 200W, the reaction time is 20min, and cooled to room temperature to obtain the nano-metal composite precursor solution.

[0035] ③ Add 3 g of the sludge catalyst carrier in ① to the precursor solution obtained in ②, stir it magnetically for 1 hour,...

Embodiment 2

[0038] ① Dry the sludge from the urban domestic sewage treatment plant at 120°C for 12 hours, then pulverize it, and sieve it through a 100-mesh sieve to obtain a sludge powder sample that passes through the sieve. Calcined at 400° C. for 5 hours under the condition of feeding air, and after cooling to room temperature, the sludge catalyst carrier was obtained.

[0039] ②Weigh 0.844gFe(NO 3 ) 3 9H 2 O, 0.442g Sr(NO) 2 Added to 50mL deionized water (Fe(NO 3 ) 3 9H 2 O and Sr(NO) 2 The molar ratio is 1:1), add 0.1g of cetyltrimethylammonium bromide (CTAB) to the above solution, stir it with magnetic force to make it evenly mixed, and then react under the condition of microwave radiation, the temperature is 80 ℃, the power The temperature is 300W, the reaction time is 30min, and cooled to room temperature to obtain a nano-metal composite precursor solution.

[0040] ③ Add 3 g of the sludge catalyst carrier in ① to the precursor solution obtained in ②, stir it magnetically...

Embodiment 3

[0043] ①Dry the sludge from the urban domestic sewage treatment plant at 105°C for 12 hours, then pulverize it, and sieve it through a 100-mesh sieve to obtain a sludge powder sample that passes through the sieve. Calcined at 500° C. for 4 hours under the condition of feeding air, and after cooling to room temperature, the sludge catalyst carrier was obtained.

[0044] ②Weigh 1.012gFe(NO 3 ) 3 9H 2 O, 0.608gBi(NO 3 ) 3 ·5H 2 O, 0.126g InN 3 o 9 ·xH 2 O was added to 120mL deionized water (Fe(NO 3 ) 3 9H 2 O, Bi(NO 3 ) 3 ·5H 2 O, InN 3 o 9 ·xH 2 (2 molar ratio is 6:3:1), in above-mentioned solution, add cetyltrimethylammonium bromide (CTAB) 0.36g, after magnetic stirring makes it evenly mix, react under microwave radiation condition, temperature is 100 ℃, the power is 200W, the reaction time is 30min, and cooled to room temperature to obtain the nano-metal composite precursor solution.

[0045] ③ Add 3 g of the sludge catalyst carrier in ① to the precursor solu...

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Abstract

The invention provides a nanocomposite heterogeneous photo-Fenton catalyst and a preparation method and application thereof. The catalyst is composed of a carrier and a catalytically active componentimmobilized in the carrier. The carrier comprises sludge incineration residues. The catalytically active component comprises nanocomposite metals. The nanocomposite metals comprise two or three of Fe2O3, MnO2, Ag2O, In2O3, Bi2O3, SrO and V2O5. The nanocomposite heterogeneous photo-Fenton catalyst has the advantages of high activity, low active component load, mature technology, good stability andlow cost in photocatalytic oxidation. The catalyst carrier has a large surface area and strong adsorption properties. The loaded active component does not easily fall off. The method has a TOC removalrate of 95% or more in high concentration and refractory organic wastewater. The nanocomposite heterogeneous photo-Fenton catalyst has high catalytic performances and a stable structure, and is conducive to promotion in the photocatalytic oxidation industry.

Description

technical field [0001] The invention relates to a novel nano-composite material heterogeneous photo-Fenton catalyst and its preparation and application, which is suitable for treating high-concentration and refractory organic industrial wastewater, and belongs to the fields of nano-materials, photocatalyst technology and environmental functional materials. technical background [0002] In recent years, sludge incineration technology has gradually become the mainstream of sludge treatment, and is increasingly favored by countries all over the world. Sludge has fuel value and can be fully digested after incineration, but it still contains heavy metal ions and toxic substances after incineration, and direct landfill will cause serious harm to the environment. In addition, the high concentration of refractory organic wastewater produced by many industrial activities is showing a growing trend, causing more and more serious ecological problems. High-concentration refractory orga...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/825B01J23/843B01J23/89C02F1/30C02F1/72C02F101/30C02F101/36
CPCC02F1/30C02F1/725B01J23/002B01J23/78B01J23/825B01J23/8437B01J23/8946C02F2101/30C02F2101/36B01J2523/00B01J2523/18B01J2523/842B01J2523/24B01J2523/33B01J2523/54
Inventor 于杨胡炼丁石虎黄菲张永军何益得乔纳森贝尔
Owner NANJING UNIV OF TECH
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