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Preparation method and application of erbium-doped zinc cobaltate photocatalyst powder

A technology of photocatalyst and zinc cobaltate, which is applied in the field of photocatalysis, can solve the problems of undiscovered, doped and improved catalytic performance, and achieve the effects of good stability, improved catalytic rate and simple production process

Active Publication Date: 2017-02-22
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing literature (Wei Xiuhua, Wei Min, Chen Donghua. ZnCo 2 o 4 Synthesis and characterization of spinel nano-powder by new co-precipitation method[J]. Journal of Xinyang Normal University: Natural Science Edition, 2007, 20(3):341-345.) has already studied ZnCo 2 o 4 There are reports of catalytic effects on methylene blue under visible-ultraviolet light irradiation, but no reports have been found on doping to improve its catalytic performance

Method used

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  • Preparation method and application of erbium-doped zinc cobaltate photocatalyst powder
  • Preparation method and application of erbium-doped zinc cobaltate photocatalyst powder
  • Preparation method and application of erbium-doped zinc cobaltate photocatalyst powder

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Embodiment 1

[0034] A kind of erbium-doped zinc cobaltate photocatalyst powder, its general formula is: ZnEr 2x co 2(1-x) o 4 , where x=0.03.

[0035] The preparation method of the erbium-doped zinc cobaltate photocatalyst powder comprises the following steps.

[0036] Weigh 32.3mmol of cobalt acetate and dissolve in 30mL deionized water, stir to prepare a clear A solution, dissolve 16.6mmol of zinc nitrate in 10mL of deionized water, stir to prepare a clear B solution, take 1mmol of erbium acetate and dissolve in 10mL of deionized water In deionized water, stir to prepare a clear C solution. Add solution A and solution C dropwise into solution B, stir and clarify (500r / min), heat at 90°C for 30min. Put the stirred and heated liquid into the oven, keep it warm at 50°C for 5 hours, then put the co-precipitate treated in the oven into the muffle furnace, raise the temperature from room temperature to 250°C for 1h, and then raise the temperature for 1.5h to 700°C Keep it warm for 4 hours...

Embodiment 2

[0039] A kind of erbium-doped zinc cobaltate photocatalyst powder, its general formula is: ZnEr 2x co 2(1-x) o 4 , where x = 0.06.

[0040] The preparation method of the erbium-doped zinc cobaltate photocatalyst powder comprises the following steps.

[0041] Weigh 15.6mmol of cobalt acetate and dissolve it in 30mL deionized water, stir to prepare a clear A solution, take 8.3mmol of zinc nitrate and dissolve it in 10mL of deionized water, stir to prepare a clear B solution, take 1mmol of erbium acetate and dissolve it in 10mL of deionized water In deionized water, stir to prepare a clear C solution. Add solution A and solution C dropwise into solution B, stir and clarify (600r / min), heat at 80°C for 40min. Put the stirred and heated liquid into the oven, keep it warm at 60°C for 4 hours, then put the co-precipitate treated in the oven into the muffle furnace, raise the temperature from room temperature to 500°C for 3h, and then raise the temperature to 700°C for 1.5h Keep ...

Embodiment 3

[0044] A kind of erbium-doped zinc cobaltate photocatalyst powder, its general formula is: ZnEr 2x co 2(1-x) o 4 , where x = 0.03.

[0045] The preparation method of the erbium-doped zinc cobaltate photocatalyst powder comprises the following steps.

[0046] Weigh 16.2mmol of cobalt acetate and dissolve in 20mL deionized water, stir to prepare a clear A solution, dissolve 8.3mmol of zinc nitrate in 20mL of deionized water, stir to prepare a clear B solution, take 0.5mmol of erbium acetate and dissolve in 20mL of In deionized water, stir to prepare a clear C solution. Add solution A and solution C dropwise into solution B, stir and clarify (500r / min), and heat at 60°C for 50min. Put the stirred and heated liquid into the oven, keep it warm at 70°C for 2.5 hours, then put the co-precipitate treated in the oven into the muffle furnace, raise the temperature from room temperature to 350°C for 2 hours, and then raise the temperature to 800°C for 2 hours Keep it warm for 3 hour...

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a preparation method and application of erbium-doped zinc cobaltate photocatalyst powder. The general formula of the photocatalyst is ZnEr2xCo2 (1-X) O4 where x is equal to 0.02 to 0.06. The preparation method is to use zinc cobaltate as a matrix which is doped with an erbium element, and the crystalline form of the doped matrix is not affected. The photocatalyst powder obtained is high in purity, and the photocatalysis performance is greatly improved. The preparation process realized by adopting direct sintering is simple and easy to operate, the calcination temperature is low, and the conditions are mild and easy to control. The sample prepared has the advantages of high purity, high yield and no need of adding precipitant and low cost, and is suitable for industrial production. The erbium-doped zinc cobaltate photocatalyst powder disclosed by the invention can be applied to increasing the photocatalytic degradation rate of Congo red.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to an erbium-doped zinc cobaltate photocatalyst powder and a preparation method and application thereof. Background technique [0002] A photocatalyst refers to a substance that can promote a chemical reaction under the irradiation of light without any change in itself. This process of promoting the formation of compounds or degrading compounds is a photocatalytic reaction. Photocatalytic reactions can use light energy to convert it into the energy required for chemical reactions to produce catalysis. TiO 2 It is currently the most thoroughly researched and widely used catalyst, which has the characteristics of non-toxic, stable and cheap. But TiO 2 There are still disadvantages such as low utilization rate of visible light, difficult recovery, relatively harsh preparation conditions, and slightly high preparation cost. Therefore, finding new photocatalysts has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F1/30C02F1/32C02F101/38C02F101/34
CPCC02F1/30C02F1/32B01J23/002B01J23/83C02F2101/34C02F2101/40C02F2101/38C02F2305/10B01J2523/00B01J35/39B01J2523/3775B01J2523/27B01J2523/845
Inventor 郭瑞刘宣文苏娜刘朝斌史晓杰韩非丁广超
Owner 东北大学秦皇岛分校
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