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a comoo 4 /g-c 3 n 4 Composite photocatalyst and preparation method and application thereof

A g-c3n4, catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of improved ability, good adsorption ability and degradation ability

Active Publication Date: 2021-02-26
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: the technical problem to be solved by the present invention is to provide a CoMoO 4 / g -C 3 N 4 Composite photocatalyst, the CoMoO 4 load on g-C 3 N 4 surface, inhibiting the Co 2+ leaked and toxic CoMoO 4 Possibility of causing secondary pollution to the water body, the composite material can improve the g-C 3 N 4 The adsorption performance of the composite material can be improved by effectively promoting electron transfer and inhibiting the recombination of electron-hole pairs. The composite material can generate sulfate radicals (E(·SO) by promoting the activation of potassium persulfate 4 2- )=2.7-3.1eV), sulfate radicals have an excellent effect on the degradation of humic acid in water, and the composite material is not limited by the oxygen concentration in aqueous solution when the water contains potassium persulfate, so it can be applied to light Catalytic degradation of anoxic organic polluted wastewater

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  • a comoo <sub>4</sub> /g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and preparation method and application thereof
  • a comoo <sub>4</sub> /g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and preparation method and application thereof
  • a comoo <sub>4</sub> /g-c <sub>3</sub> n <sub>4</sub> Composite photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a g-C 3 N 4 The preparation method of powder: get 5g melamine and place in glass magnetic boat, put the glass magnetic boat that fills melamine into tube furnace then, in N 2 Programmable temperature rise under atmosphere: 0-500, 5°C / min; 500°C, 2h; 500-550, 5°C / min; 550°C, 2h, that is, the temperature is raised at a heating rate of 5°C / min in the temperature range of 0-500°C Calcined at 500°C for 2 hours, then raised to 550°C at a rate of 5°C / min in the temperature range of 500-550°C and calcined for 2 hours; after obtaining a light yellow solid, grind it to obtain g-C 3 N 4 powder.

Embodiment 2

[0040] A CoMoO 4 The preparation method of nanorods: weigh 0.24195gNa 2 MoO 4 2H 2 O and 0.29103gCo(NO 3 ) 2 ·6H 2 O was added to 50mL deionized water, stirred for 30min, and then ultrasonicated for 10min to obtain a mixed solution; the mixed solution was placed in a 100mL reactor, and reacted at 180°C for 5h; after the reaction, naturally cooled to room temperature, and the precipitate in the reactor was taken out was washed three times with deionized water and absolute ethanol, and finally dried at 60 °C to obtain CoMoO 4 Nano stave.

Embodiment 3

[0042] g-C of the present invention 3 N 4 / CoMoO 4 Preparation method of composite material:

[0043] Step 1, get 5g melamine and place it in a glass magnetic boat, then put the glass magnetic boat filled with melamine into a tube furnace, 2 Programmable temperature rise under atmosphere: 0-500, 5°C / min; 500°C, 2h; 500-550, 5°C / min; 550°C, 2h, that is, in the temperature range of 0-500°C, the heating rate is 5°C / min Calcined at 500°C for 2 hours, then heated to 550°C at a rate of 5°C / min in the temperature range of 500-550°C and calcined for 2 hours; after obtaining a light yellow solid, grind it to obtain g-C 3 N 4 powder;

[0044] Step 2, weigh 0.24195gNa 2 MoO 4 2H 2 O and 0.29103gCo(NO 3 ) 2 ·6H 2 O was added to 50mL deionized water, stirred for 30min and then ultrasonicated for 10min to obtain the mixed solution A;

[0045] Step 3, weigh 0.2187g of g-C prepared in step 1 3 N 4 Add the powder to the mixed solution A, adjust the pH of the mixed reaction soluti...

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Abstract

The invention discloses a CoMoO 4 / g‑C 3 N 4 Composite photocatalyst, described photocatalyst is two-dimensional lamellar g-C 3 N 4 A certain amount of CoMoO is loaded on 4 Nanorods; g‑C 3 N 4 On CoMoO 4 The loading amount of nanorods is 5%-15% (mass percentage). The present invention also discloses the above-mentioned CoMoO 4 / g‑C 3 N 4 Preparation method of composite photocatalyst and its application in adsorption and degradation of humic acid in anoxic water. CoMoO of the present invention 4 / g‑C 3 N 4 The composite material has good adsorption and degradation capabilities for humic acid in water under visible light, especially in the presence of persulfate in water, CoMoO 4 / g‑C 3 N 4 It can effectively activate persulfate to generate sulfate radicals, thereby further improving its ability to degrade organic pollutants in water.

Description

technical field [0001] The present invention relates to a CoMoO 4 / g -C 3 N 4 Composite photocatalysts, also involving the aforementioned CoMoO 4 / g -C 3 N 4 The preparation method and application of a composite photocatalyst belong to the technical field of photocatalysts. Background technique [0002] Humic acid (HA), as a naturally occurring organic electrolyte, can be used to treat heavy metals in water. However, the presence of humic acid in drinking water chlorination usually produces carcinogenic chlorine-containing organic compounds, which seriously threaten human health. Studies have shown that modified TiO 2 It has a certain treatment effect on the degradation of HA in water, but the treatment efficiency is very low, and it often relies heavily on oxygen in water to generate superoxide radicals to oxidize organic matter in water. [0003] Graphite carbon nitride (g-C 3 N 4 ) has become one of the most promising photocatalysts due to its unique two-dimensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/34C02F1/30C02F1/28C02F101/34C02F101/36
CPCB01J27/24B01J35/004B01J37/082B01J37/343C02F1/281C02F1/30C02F2101/34C02F2101/36C02F2305/10
Inventor 杨汉培高照黄俊杰
Owner HOHAI UNIV
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