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Preparation method and application of Z-type alpha-Fe2O3/ZnIn2S4 composite photocatalyst

A -fe2o3, composite light technology, applied in the field of photocatalytic materials, can solve problems such as the improvement of unfavorable catalytic activity, poor specific surface effect, etc., to achieve the effect of photocatalytic activity, strong reducibility, and high photocatalytic activity

Active Publication Date: 2022-03-04
YONGGAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

γ-Fe2O3 was first prepared by a multi-step method, and then compounded with ZnIn2S4 to form the corresponding However, the specific surface effect of γ-Fe2O3 formed by it is not good, which is not conducive to the improvement of catalytic activity

Method used

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  • Preparation method and application of Z-type alpha-Fe2O3/ZnIn2S4 composite photocatalyst
  • Preparation method and application of Z-type alpha-Fe2O3/ZnIn2S4 composite photocatalyst
  • Preparation method and application of Z-type alpha-Fe2O3/ZnIn2S4 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a clean container, dissolve 0.25mmol of ferric nitrate, 1mmol of zinc nitrate, 2mmol of indium nitrate and 8mmol of thioacetamide in 75mL of dimethylformamide to form a mixed solution, and then, the mixed solution Transfer to a 100mL hydrothermal reaction kettle, control the hydrothermal reaction kettle in a sealed state, raise the temperature and control the temperature to react for 10 hours under the condition of 180°C, during the reaction process, since the hydrothermal reaction kettle is in a sealed state, as the temperature rises, During the reaction, the pressure of the system is positive, and the pressure of the system is also controlled at ≤0.3MPa during the reaction. After the reaction is completed, after natural cooling, high-speed centrifugation and water washing, the solid target product obtained is dried at 60°C , that is, α-Fe 2 o 3 / ZnIn 2 S 4 composite photocatalyst. According to the difference in the amount of ferric nitrate added, the prepared p...

Embodiment 2

[0025] In a clean container, dissolve 0.5mmol of ferric nitrate, 1mmol of zinc nitrate, 2mmol of indium nitrate and 8mmol of thioacetamide in 75mL of dimethylformamide to form a mixed solution, and then dissolve the mixed solution Transfer to a 100mL hydrothermal reaction kettle, control the hydrothermal reaction kettle in a sealed state, raise the temperature and control the temperature to react for 12 hours under the condition of 170°C, during the reaction process, since the hydrothermal reaction kettle is in a sealed state, as the temperature rises, When the reaction is carried out, the pressure of the system is positive, and the pressure of the system is also controlled at ≤0.3MPa during the reaction process. After natural cooling, high-speed centrifugation and water washing, the solid target product obtained is dried at 60°C to obtain α-Fe 2 o 3 / ZnIn 2 S 4 composite photocatalyst. According to the difference in the amount of ferric nitrate added, the prepared product...

Embodiment 3

[0028] In a clean container, dissolve 1mmol or 2mmol of ferric nitrate, 1mmol of zinc nitrate, 2mmol of indium nitrate and 8mmol of thioacetamide in 80mL of dimethylformamide to form a mixed solution, and then mix the Transfer the liquid to a 100mL hydrothermal reaction kettle, control the hydrothermal reaction kettle in a sealed state, raise the temperature and control the temperature to react for 14 hours under the condition of 180 ° C, during the reaction process, because the hydrothermal reaction kettle is in a sealed state, as the temperature increases During the rise and reaction, the pressure of the system is positive, and the pressure of the system is also controlled at ≤0.3MPa during the reaction process. After natural cooling, high-speed centrifugation, washing with water, and drying at 60°C, the α-Fe 2 o 3 / ZnIn 2 S 4 composite photocatalyst. According to the addition amount of ferric nitrate (1mmol or 2mmol), the products prepared by the method of this example a...

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Abstract

The invention relates to a preparation method and application of a Z-type alpha-Fe2O3 / ZnIn2S4 composite photocatalyst, and belongs to the technical field of photocatalytic materials. In order to solve the problem of poor activity in the prior art, the invention provides a preparation method of a Z-type alpha-Fe2O3 / ZnIn2S4 composite photocatalyst, which comprises the following steps: in a hydrothermal reaction kettle, adding an iron source, a zinc source, an indium source and a sulfur source into an oxygen atom-containing amine solvent capable of dissolving raw materials, then enabling the hydrothermal reaction kettle to be in a sealed state, and carrying out hydrothermal reaction for 2-4 hours; the preparation method comprises the following steps: adding ZnIn2S4 into a reaction kettle, heating, controlling the temperature to be 120-180 DEG C, carrying out high-temperature reaction, and after the reaction is finished, cooling and separating to obtain the Z-type alpha-Fe2O3 / ZnIn2S4 composite photocatalyst. The composite catalyst can maintain the strong oxidizing property of photo-generated holes and the strong reducibility of photo-generated electrons, so that the performance of high photocatalytic activity is realized.

Description

technical field [0001] The invention relates to a Z-type α-Fe 2 o 3 / ZnIn 2 S 4 The preparation method and application of a composite photocatalyst belong to the technical field of photocatalytic materials. Background technique [0002] As an efficient and green water treatment technology with broad application prospects, semiconductor photocatalysis technology has been paid more and more attention by people. Among many semiconductor photocatalytic materials, iron oxide (Fe 2 o 3 ), as a low-cost, stable performance and environmentally friendly narrow-bandgap semiconductor photocatalytic material, its bandgap width is 2.1-2.2eV, it has visible light response and strong photogenerated hole oxidation ability, and it can be used in photocatalytic degradation of organic pollution The field of material and water decomposition has received extensive attention, such as the photocatalytic degradation of organic pollutants in waste liquid, the degradation of organic pollutants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J23/745B01J37/10C02F1/30C02F101/34C02F101/38
CPCB01J27/04B01J23/745B01J37/10C02F1/30C02F2305/10C02F2101/34C02F2101/38C02F2101/40B01J35/39Y02W10/37
Inventor 陈伟陈卫黄剑
Owner YONGGAO CO LTD
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