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A kind of ferric oxide-nickel oxide-cerium dioxide ozone catalyst based on ceramic film and its preparation and application

A catalyst and ceramic membrane technology, applied in the field of water pollution treatment, can solve problems such as poor water quality, secondary pollution degradation effect, and difficulty in recycling suspended catalysts, achieving high loading, excellent ozone catalytic effect, and good COD removal effect. Effect

Active Publication Date: 2018-10-16
上海禾澜纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For iron and steel wastewater with high organic content and high COD concentration, it is difficult to meet the national discharge standards with existing treatment technologies, combined with ozone catalysis, it can effectively solve the difficulty in the recovery of suspended catalysts, secondary pollution to water quality, and poor degradation effects, etc. Problem The present invention proposes a new technical solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) First, immerse the ceramic membrane in 0.2wt% polydiallyldimethylammonium chloride solution for 30 minutes, then take it out and immerse it in 0.01mol / L NaOH solution for 30 seconds, let it stand at room temperature, and set aside;

[0024] (2) Secondly, Fe(NO 3 ) 3 9H 2 O, Ni(NO 3 ) 2 ·6H 2 O, Ce(NO 3 ) 3 ·6H 2 After O is dissolved, the pH of the system is adjusted to about 7-8 with NaOH solution, mixed and stirred for 1 hour, left to stand at room temperature for 12 hours, washed, filtered, and dried to obtain Fe 2 o 3 -NiO-CeO 2 Ozone catalyst precursor powder;

[0025] (3) Fe 2 o 3 -NiO-CeO 2 The ozone catalyst powder is loaded on the ceramic film, that is, at 0°C, the Fe in (2) is mixed according to the mass ratio of 300:1 2 o 3 -NiO-CeO 2 Ternary ozone catalyst precursor powder dispersed in KNO 3 Ultrasound for 30 minutes in the solution, and after it is completely dispersed, put the ceramic film in (1) into the dispersion solution for 30 minu...

Embodiment 2

[0027](1) First, immerse the ceramic membrane in 0.2wt% sodium polystyrene sulfonate solution for 30 minutes, then take it out and immerse it in 0.01mol / L NaOH solution for 30 seconds, let it stand at room temperature, and set aside;

[0028] (2) Secondly, Fe(NO 3 ) 3 9H 2 O, Ni(NO 3 ) 2 ·6H 2 O, Ce(NO 3 ) 3 ·6H 2 After O is dissolved, the pH of the system is adjusted to about 7-8 with NaOH solution, mixed and stirred for 1 hour, left to stand at room temperature for 12 hours, washed, filtered, and dried to obtain Fe 2 o 3 -NiO-CeO 2 Ozone catalyst precursor powder;

[0029] (3) Fe 2 o 3 -NiO-CeO 2 The ozone catalyst powder is loaded on the ceramic film, that is, at 0°C, the Fe in (2) is mixed according to the mass ratio of 100:1 2 o 3 -NiO-CeO 2 Ternary ozone catalyst precursor powder dispersed in KNO 3 Ultrasound for 30 minutes in the solution, after the dispersion is complete, put the ceramic membrane in (1) into the dispersion solution for 30 minutes and f...

Embodiment 3

[0031] (1) First, immerse the ceramic membrane in 0.2wt% polydiallyldimethylammonium chloride solution for 30 minutes, then take it out and immerse it in 0.01mol / L NaOH solution for 30 seconds, let it stand at room temperature, and set aside;

[0032] (2) Secondly, Fe(NO 3 ) 3 9H 2 O, Ni(NO 3 ) 2 ·6H 2 O, Ce(NO 3 ) 3 ·6H 2 After O is dissolved, the pH of the system is adjusted to about 7-8 with NaOH solution, mixed and stirred for 1 hour, left to stand at room temperature for 12 hours, washed, filtered, and dried to obtain Fe 2 o 3 -NiO-CeO 2 Ozone catalyst precursor powder;

[0033] (3) Fe 2 o 3 -NiO-CeO 2 The ozone catalyst powder is loaded on the ceramic film, that is, at 0°C, the Fe in (2) is mixed according to the mass ratio of 300:1 2 o 3 -NiO-CeO 2 Ternary ozone catalyst precursor powder dispersed in KNO 3 Ultrasound for 30 minutes in the solution, and after the dispersion is complete, put the ceramic film in (1) into the dispersion solution for 30 minu...

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Abstract

The invention relates to a ceramic membrane based ferric oxide-nickel oxide-cerium oxide ozone catalyst and preparation and application thereof. The ceramic membrane based Fe2O3-NiO-CeO2 ozone catalyst is prepared by steps: impregnating a ceramic membrane serving as a matrix of the catalyst into 0.2wt% of polyelectrolyte solution for 30min, taking out, impregnating in 0.01mol / L of NaOH solution for 30s, and standing at the room temperature; dissolving Fe(NO3)3'9H2O, Ni(NO3)2'6H2O, Ce(NO3)3'6H2O equal in mole ratio, adopting NaOH solution for regulating system pH to about 7-8, mixing and stirring for 1h, standing for ageing for 12h at the room temperature, washing, filtering and drying to obtain precursor powder of the Fe2O3-NiO-CeO2 ozone catalyst; loading the precursor powder of the Fe2O3-NiO-CeO2 ozone catalyst to the ceramic membrane according to a layer-by-layer deposition heat treatment method to obtain the supported Fe2O3-NiO-CeO2 ozone catalyst. The problem of water pollution such as high organic content and high COD (chemical oxygen demand) concentration can be solved.

Description

technical field [0001] The invention relates to a ferric oxide-nickel oxide-cerium oxide Fe with a ceramic film as the substrate 2 o 3 -NiO-CeO 2 The preparation method of the ozone catalyst can solve water pollution problems such as high organic matter content and high COD concentration, and is used in the field of water pollution treatment. Background technique [0002] Ozone catalytic oxidation technology is an efficient sewage advanced treatment technology, and it is a research hotspot in the field of industrial sewage treatment in recent years. Compared with ozone oxidation alone, heterogeneous catalytic oxidation ozonation can decompose organic pollutants in wastewater that are refractory to ozone oxidation alone. At present, most of the studies are supported heterogeneous catalysts, mostly Al 2 o 3 , SiO 2 , activated carbon, natural ore, molecular sieve, etc. as carriers, has the characteristics of high catalytic ozone decomposition efficiency, low catalytic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/78
CPCB01J23/002B01J23/83B01J2523/00C02F1/725C02F1/78B01J2523/842B01J2523/847B01J2523/3712
Inventor 何丹农童琴严良高小迪代卫国金彩虹
Owner 上海禾澜纳米科技有限公司