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Preparation method of supported cadmium doped sulfur indium zinc photocatalyst

A technology of photocatalyst and sulfur doping, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of good stability, good absorption, and excellent mechanical stability

Inactive Publication Date: 2019-10-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sunflower stem pith has a spongy porous structure, light specific gravity, rich ligands, and is easy to be chemically modified. It is very suitable as a catalyst carrier. Sunflower stem pith has not been reported as a catalyst carrier.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Pretreatment of sunflower stem pulp powder: In the reactor, add 4mol / L nitric acid solution: 85 mL, mass percentage concentration of 30% hydrogen peroxide: 5 mL, stir to dissolve, and then add sunflower stem pulp Powder: 10g, soaked at room temperature for 4 hours, then boiled for 10 minutes, washed with deionized water to neutrality after cooling, solid-liquid separation, and dried to obtain pretreated sunflower stem pulp powder;

[0022] (2) Cadmium doped ZnIn 2 S 4 Preparation of photocatalyst: In the reactor, separately add, deionized water: 56 mL, indium chloride: 11g, zinc sulfate: 5g, ammonium persulfate: 0.5g, stirring to dissolve, cadmium chloride: 0.5g, stirring slowly Add thioglycolic acid: 27g, continue to stir after adding for 20 minutes, transfer to the autoclave, place it in an oven at 110 ℃ for 12 hours, cool to room temperature, obtain a yellow precipitate, wash with deionized water and absolute ethanol Performance, solid-liquid separation, drying at ...

Embodiment 2

[0025] (1) Pretreatment of sunflower stem pulp powder: In the reactor, add 4mol / L nitric acid solution: 84 mL, mass percentage of 30% hydrogen peroxide: 4 mL, stir to dissolve, and then add sunflower stem pulp Powder: 12g, soaked at room temperature for 4h, then boiled for 10min, washed with deionized water to neutrality after cooling, separated from solid and liquid, and dried to obtain pretreated sunflower stem pulp powder;

[0026] (2) Cadmium doped ZnIn 2 S 4 Preparation of photocatalyst: In the reactor, separately add, deionized water: 54 mL, indium chloride: 13g, zinc sulfate: 6g, ammonium persulfate: 1g, stir to dissolve, cadmium chloride: 1g, stir and slowly add mercapto group Acetic acid: 25g, after adding, continue to stir for 20min, transfer to an autoclave, and place it in an oven at 110°C for 12 hours to react, cool to room temperature to obtain a yellow precipitate, wash with deionized water and absolute ethanol until neutral. Solid-liquid separation and drying at ...

Embodiment 3

[0029] (1) Pretreatment of sunflower stem pulp powder: In the reactor, add 4mol / L nitric acid solution: 87 mL, mass percentage concentration of 30% hydrogen peroxide: 4mL, stir to dissolve, and then add sunflower stem pulp powder :9g, soak at room temperature for 4h, then boil for 10min, wash with deionized water to neutrality after cooling, separate solid and liquid, and dry to obtain pretreated sunflower stem pulp powder;

[0030] (2) Cadmium doped ZnIn 2 S 4 Preparation of photocatalyst: In the reactor, add separately, deionized water: 58mL, indium chloride: 9g, zinc sulfate: 4g, ammonium persulfate: 0.5g, stir to dissolve, cadmium chloride: 0.5g, add slowly with stirring Thioglycolic acid: 28g, after adding, continue to stir for 20min, transfer to an autoclave, and place it in an oven at 110 ℃ for 12 hours to react, cool to room temperature, obtain a yellow precipitate, wash with deionized water and absolute ethanol until neutral , Solid-liquid separation, 80℃±5 drying, get ...

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Abstract

The invention discloses a preparation method of a supported cadmium doped sulfur indium zinc photocatalyst, which is characterized in that firstly nitric acid and hydrogen peroxide are adopted to pretreat sunflower stem pith powder; a cadmium doped ZnIn2S4 photocatalyst is prepared by a hydrothermal method, then, in a reactor, 56 to 60% by mass of absolute ethanol, 12 to 16% by mass of vinyl triethoxysilane and 8 to 10% by mass of the cadmium doped ZnIn2S4 photocatalyst are and evenly stirred, 16-20% by mass of the pretreated sunflower stem pith powder is added, the mixture is kept at 85+ / -2 DEG C, stirred and reacted for 4 hours, and washed with water after the reaction is finished until filtrate is neutral, solid and liquid separation is performed, and the supported cadmium doped sulfurindium zinc photocatalyst is obtained by drying. The supported cadmium doped sulfur indium zinc photocatalyst is simple in preparation method, stable, degradable and environmentally friendly. The supported cadmium doped sulfur indium zinc photocatalyst is easy to recover and has the characteristics of mild reaction conditions, high catalytic activity, small dosage and the like.

Description

Technical field [0001] The present invention relates to the technical field of the preparation of supported catalysts, in particular to a preparation method of a supported cadmium-doped indium-sulfide-zinc photocatalyst and its application in wastewater treatment. Background technique [0002] Semiconductor photocatalysis technology, as a new "green chemical method", has been extensively studied in energy conversion and environmental remediation applications. Traditional semiconductor photocatalysts such as TiO2 and ZnO have strong oxidizing properties and good light inductivity, and have been widely used in the degradation of various pollutants in water. However, due to the wide band gap (such as TiO2 band gap energy of 3.2 eV), only The use of ultraviolet light, which accounts for only 4% of the solar spectrum, obviously limits its application. Therefore, the development of new visible light-responsive semiconductor photocatalysts has attracted more and more attention. In rec...

Claims

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Application Information

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IPC IPC(8): B01J27/04C02F1/30C02F101/30C02F101/38C02F103/30
CPCB01J27/04C02F1/30C02F2101/308C02F2101/30C02F2101/40C02F2305/10C02F2103/30B01J35/39
Inventor 李慧芝许崇娟赵淑英
Owner UNIV OF JINAN
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