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Preparation method of zinc molybdate/graphene composite visible light catalyst

A graphene composite, visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. The industrial application of nano-photocatalytic technology has achieved the effect of good crystal form and light absorption performance, wide absorption spectrum range, and strong market application prospects.

Inactive Publication Date: 2014-08-27
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-phase semiconductor nanophotocatalyst powder suspension system that has been widely studied at present has defects such as easy aggregation and deactivation of nanoparticles, low utilization efficiency, difficulty in separation and recovery, and narrow absorption spectrum range, which seriously limits the industrialization of nanophotocatalytic technology. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] 2mmol Na 2 MoO 4 Added to 40 mL of water, ultrasonically dissolved for 30 minutes to obtain a clear solution, recorded as solution X. At the same time, 2mmol Zn(CH 3 COO) 2 2H 2 O was stirred and dissolved in 40 mL of water to obtain a transparent and clear solution, which was designated as solution Y. Then, solution Y was added dropwise (about 2 mL / min) into solution X under ultrasonication, and the ultrasonication was continued for 120 min. After the reaction, filter, wash with water and ethanol three times respectively, and then dry at 80° C. for 5 hours in a constant temperature drying oven to obtain pure zinc molybdate photocatalyst. The RhB removal rate of degrading Rhodamine B dye wastewater under natural sunlight for 10 hours was 28.4%.

Embodiment 2

[0011] Add 0.0048g of graphene oxide (GO) into 40mL of water and ultrasonically disperse for 60min. Then add 2mmol Na 2 MoO 4 Add it into the graphene oxide aqueous solution, continue ultrasonic dissolution for 30min, and record it as solution X. At the same time, 2mmol Zn(CH 3 COO) 2 2H 2 O was stirred and dissolved in 40 mL of water to obtain a transparent and clear solution, which was designated as solution Y. Then, solution Y was added dropwise (about 2 mL / min) into solution X under ultrasonication, and the ultrasonication was continued for 120 min. Then add 0.1mL of hydrazine hydrate, stir evenly, transfer to a constant temperature water bath, and reduce the reaction in a water bath at 80°C until the polymerization precipitates, and the solution becomes clear. After the reaction, the solution was naturally cooled to room temperature, filtered, washed with water and ethanol three times, and then dried in a constant temperature drying oven at 80°C for 5 hours to obtai...

Embodiment 3

[0013] Add 0.0144g graphene oxide into 40mL water and ultrasonically disperse for 60min. Then add 2mmol Na 2 MoO 4 Add it into the graphene oxide aqueous solution, continue ultrasonic dissolution for 30min, and record it as solution X. At the same time, 2mmol Zn(CH 3 COO) 2 2H 2 O was stirred and dissolved in 40 mL of water to obtain a transparent and clear solution, which was designated as solution Y. Then, solution Y was added dropwise (about 2 mL / min) into solution X under ultrasonication, and the ultrasonication was continued for 120 min. Then add 0.3mL of hydrazine hydrate, stir evenly, transfer to a constant temperature water bath, and reduce the reaction in a water bath at 80°C until the polymerization precipitates, and the solution becomes clear. After the reaction, the solution was naturally cooled to room temperature, filtered, washed with water and ethanol three times, and then dried in a constant temperature drying oven at 80°C for 5 hours to obtain a zinc mo...

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Abstract

The invention discloses a preparation method of a zinc molybdate / graphene composite visible light catalyst. The preparation method comprises the following steps of (1) adding 2 mmol of Na2M0O4 into a graphene oxide solution, and performing ultrasonic dissolution for 30 min, so as to prepare a solution X; (2) mixing and dissolving 2mmol of Zn(CH3COO)2.2H20 into 40 ml of water, so as to obtain a transparent clear solution Y; (3) dropwise adding the solution Y into the solution X under the ultrasonic action, performing ultrasonic operation for 120 min, then adding hydrazine hydrate, uniformly mixing, and then reducing in a water bath at 80 DEG C to polymerize and precipitate, so that the solution is clear; (4) naturally cooling the solution to room temperature after reaction, filtering, washing with water and ethanol respectively for three times, and then drying in a constant-temperature drying box at 80 DEG C for 5 hours, so as to prepare the zinc molybdate / graphene composite visible light catalyst. By using the zinc molybdate / graphene composite visible light catalyst prepared with the preparation method, the light absorption can be improved. The zinc molybdate / graphene composite visible light catalyst has the advantages of wide absorption spectrum range, stable performance, no toxicity, high efficiency and cheapness, can be applied to degrading organic pollutants which are difficult to biodegrade and has a strong market application prospect.

Description

technical field [0001] The invention belongs to the technical field of visible light catalytic materials, and in particular relates to a preparation method of a zinc molybdate / graphene composite visible light catalyst capable of efficiently degrading rhodamine B dye wastewater. Background technique [0002] Dye wastewater is one of the typical refractory organic wastewater. A large number of dyes with high alkalinity, deep color and strong odor enter the environment during production and use, and some of them also contain benzene rings, amino groups, azo groups, etc. Carcinogenic substances seriously pollute the environment, and the removal effect of conventional biological treatment is not ideal. Nanotechnology is a cutting-edge and interdisciplinary emerging discipline that gradually developed in the late 1980s. It has great potential in creating new production processes, new substances and new products. Nano-semiconductor photocatalytic oxidation technology has attracted...

Claims

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Application Information

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IPC IPC(8): B01J23/28C02F1/30C02F101/34C02F101/38
CPCY02W10/37
Inventor 孙剑辉董淑英孙靖宇冯精兰皮运清崔延瑞苏现伐闫旭
Owner HENAN NORMAL UNIV
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