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Preparation method and application of visible light and ozone cooperating catalyst for catalytically degrading organic acid

An organic acid catalyst and ozone catalysis technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., to achieve high catalytic degradation efficiency

Inactive Publication Date: 2016-12-21
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

g-C loaded with metal oxide 3 N 4 As a catalyst, the catalytic degradation of oxalic acid in water by visible light synergistically with ozone has not been reported yet

Method used

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  • Preparation method and application of visible light and ozone cooperating catalyst for catalytically degrading organic acid
  • Preparation method and application of visible light and ozone cooperating catalyst for catalytically degrading organic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of MnO x / g -C 3 N 4 catalyst

[0027] The preparation method of the catalyst for the visible light synergistic ozone catalytic degradation organic acid provided in this embodiment comprises the following steps:

[0028] Step 1, the manganese acetate (III) dihydrate (C 6 h 13 MnO 8 ) and dissolved in 40ml of ultrapure water, after stirring for 5min, 4g of melamine was added to obtain a mixed solution.

[0029] Step 2, heating the mixed solution until the water is evaporated to dryness while stirring to obtain the mixture, and putting the mixture into an oven at a temperature of 90° C. to dry to obtain the dried mixture;

[0030] Step 3: Grinding the dried mixture obtained in Step 2, putting it into a crucible and calcining it in a muffle furnace with a temperature of 550°C (rising temperature: 10°C / min) for 4 hours to obtain a calcined mixture;

[0031] Step 4, after grinding the calcined mixture obtained in step 3, sieve under a sieve of 10...

Embodiment 2

[0034] Example 2 Preparation of MnO x / g -C 3 N 4 catalyst

[0035] The preparation method of the visible light synergistic ozone catalytic degradation organic acid catalyst provided in this embodiment comprises the following steps:

[0036] Step 1, the manganese acetate (III) dihydrate (C 6 h 13 MnO 8 ) and dissolved in 32ml of ultrapure water, after stirring for 10min, 2g of melamine was added to obtain a mixed solution.

[0037] Step 2: heating the mixed solution until the water is evaporated to dryness while stirring to obtain a mixture, and drying the mixture in an oven at a temperature of 80° C. to obtain a dried mixture.

[0038] Step 3: Grinding the dried mixture obtained in Step 2, putting it into a crucible and calcining for 3 hours in a muffle furnace at a temperature of 500°C (rising temperature: 10°C / min) to obtain a calcined mixture.

[0039] Step 4, after grinding the calcined mixture obtained in step 3, sieve under a sieve of 150 mesh (Taylor standard siev...

Embodiment 3

[0040] Example 3 Preparation of MnO x / g -C 3 N 4 catalyst

[0041] The preparation method of the visible light synergistic ozone catalytic degradation organic acid catalyst provided in this embodiment comprises the following steps:

[0042] Step 1, the manganese acetate (III) dihydrate (C 6 h 13 MnO 8 ) and dissolved in 36ml of ultrapure water, after stirring for 8min, 3.2g of melamine was added to obtain a mixed solution.

[0043] Step 2: heating the mixed solution until the water is evaporated to dryness while stirring to obtain a mixture, and drying the mixture in an oven at a temperature of 120° C. to obtain a dried mixture.

[0044] Step 3: Grinding the dried mixture obtained in Step 2, putting it into a crucible and calcining for 5 hours in a muffle furnace at a temperature of 600°C (rising temperature: 10°C / min) to obtain a calcined mixture.

[0045] Step 4, after grinding the calcined mixture obtained in step 3, sieve under a sieve of 200 mesh (Taylor standard ...

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Abstract

The invention provides a preparation method of a visible light and ozone cooperating catalyst for catalytically degrading organic acid. The preparation method comprises the following steps that 1, manganese acetate is weighed and dissolved in ultrapure water, melamine is added after stirring, and a mixed solution is obtained; 2, the mixed solution is heated while being stirred till water is evaporated to be dry, a mixture is obtained, the mixture is dried, and the dried mixture is obtained; 3, the dried mixture obtained in the step 2 is ground and then calcined, and the calcined mixture is obtained; 4, the calcined mixture obtained in the step 3 is ground and screened, and then the catalyst is obtained. The catalyst is added into the organic acid, ozone is introduced, the organic acid in industrial waste water is catalytically degraded under the condition of visible light illumination, the catalytic degradation efficiency is high, the organic acid in the industrial waste water is effectively treated, and the preparation method is suitable for industrial application.

Description

technical field [0001] The invention relates to a preparation method and application of a catalytic degradation organic acid catalyst. Background technique [0002] There is usually a certain concentration of refractory organic substances in industrial wastewater. After chemical or biological treatment, these substances usually generate some small molecular organic substances, which are difficult to be directly mineralized into CO 2 and H 2 O. Small molecule organic acids are usually the organic products of some pollutants after chemical oxidation, among which oxalic acid is the main product of phenol ozonation degradation. The reaction rate constant of oxalic acid and ozone molecules is very small (k<0.04M -1 the s -1 ), but reacts quickly with OH radicals (k≈10 6 m -1 the s -1 ). Therefore, it is difficult to completely convert oxalic acid into CO by ozone oxidation alone. 2 with H 2 O, catalytic ozone has a greater degradation effect than ozonation alone. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/72C02F1/78C02F1/30C02F101/34
CPCC02F1/30C02F1/725C02F1/78B01J27/24C02F2101/34B01J35/39Y02W10/37
Inventor 李亮杨玉飞黄远星姚吉胡守波貟亚峰罗梦玉
Owner UNIV OF SHANGHAI FOR SCI & TECH
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