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Sulfur-indium-zinc, gold and carbon nitride two-dimensional lamellar composite photocatalyst preparation method

A composite catalyst, two-dimensional layered technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of increased contact area, easy operation, and strong photocatalytic activity

Active Publication Date: 2018-08-17
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To date, no ZnIn 2 S 4 / Au / g-C 3 N 4 Report on 2D Layered Composite Materials

Method used

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  • Sulfur-indium-zinc, gold and carbon nitride two-dimensional lamellar composite photocatalyst preparation method
  • Sulfur-indium-zinc, gold and carbon nitride two-dimensional lamellar composite photocatalyst preparation method
  • Sulfur-indium-zinc, gold and carbon nitride two-dimensional lamellar composite photocatalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Take 7.3525g of C 6 h 5 Na 3 o 7 2H 2 O was dissolved in 50mL deionized water and stirred for 30min;

[0027] 2) Take 2.5mL of 0.01M / L HAuCl 4 , dilute to 100mL, add 200uL of sodium citrate solution prepared in step 1) after heating to boiling, keep boiling for 15min, restore the volume to 100mL, cool to room temperature, and obtain a stable gold colloid mixed solution;

[0028] 3) Add 0.5g g-C 3 N 4 Dissolve in 52.5mL ethanol and sonicate for 30min;

[0029] Ultrasonic conditions: ultrasonic frequency is 40kHz, ultrasonic power is 150W;

[0030] 4) 0.0176g Zn(NO 3 ) 2 ·6H 2 0,0.0045g In(NO 3 ) 3 4.5H 2 O, 0.0572g L-Cysteine ​​was dissolved in 17.5mL glycerol and 10mL step 2) gold colloid mixed solution gained, then stirred for 15min;

[0031] 5) Mix the two solutions obtained in step 3) and 4) and stir for 30min to make g-C 3 N 4 Adsorb free ions and L-Cysteine ​​molecules to obtain ZnIn 2 S 4 / Au / g-C 3 N 4 The precursor solution;

[0032] 6) Tra...

Embodiment 2

[0036] Embodiment 2, with embodiment 1, difference is,

[0037] 4) 0.0528g Zn(NO 3 ) 2 ·6H 2 0,0.0135g In(NO 3 ) 3 4.5H 2 O, 0.1716g L-Cysteine ​​was dissolved in 17.5mL glycerol and 10mL step 2) gold colloid mixed solution gained, then stirred for 15min;

[0038] 5) Mix the two solutions obtained in step 3) and 4) and stir for 30min to make g-C 3 N 4 Adsorb free ions and L-Cysteine ​​molecules to obtain ZnIn 2 S 4 / Au / g-C 3 N 4 The precursor solution;

[0039] 6) Transfer the precursor solution obtained in step 5) into a 100mL stainless steel hydrothermal reaction kettle with polytetrafluoroethylene lining, and react at 180°C for 24h to obtain a powder sample.

[0040] The prepared ZnIn of this embodiment 2 S 4 / Au / g-C 3 N 4 g-C in two-dimensional layered composite catalysts 3 N 4 with ZnIn 2 S 4 The mass ratio is 1:0.15.

Embodiment 3

[0041] Embodiment 3, with embodiment 1, difference is,

[0042] 4) 0.088g Zn(NO 3 ) 2 ·6H 2 0, 0.0225g In(NO 3 ) 3 4.5H 2 O, 0.286g L-Cysteine ​​was dissolved in 17.5mL glycerol and 10mL step 2) gold colloid mixed solution gained, then stirred for 15min;

[0043] 5) Mix the two solutions obtained in step 3) and 4) and stir for 30min to make g-C 3 N 4 Adsorb free ions and L-Cysteine ​​molecules to obtain ZnIn 2 S 4 / Au / g-C 3 N 4 The precursor solution;

[0044] 6) Transfer the precursor solution obtained in step 5) into a 100mL stainless steel hydrothermal reaction kettle lined with polytetrafluoroethylene, and react at 160°C for 26h to obtain a powder sample.

[0045] The ZnIn prepared in this embodiment 2 S 4 / Au / g-C 3 N 4 g-C in two-dimensional layered composite catalysts 3 N 4 with ZnIn 2 S 4 The mass ratio is 1:0.25. Powdered ZnIn 2 S 4 / Au / g-C 3 N 4 The scanning electron micrographs of the two-dimensional layered composite catalyst are shown in ...

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Abstract

The invention discloses a sulfur-indium-zinc, gold and carbon nitride two-dimensional lamellar composite photocatalyst preparation method. The method includes: dissolving C6H5Na3O7 2H2O into dissolvedwater, diluting HAuCl4, heating to boil, adding sodium citrate solution, boiling, and cooling to the room temperature to obtain gold colloid mixed solution; dissolving g-C3N4 into ethyl alcohol, performing ultrasonic treatment, dissolving Zn(NO3)2 6H2O, In(NO3)3 4.5H2O and L-Cysteine into glycerin and the gold colloid mixed solution, mixing with g-C3N4 solution, and adsorbing to obtain ZnIn2S4 / Au / g-C3N4 precursor solution; performing heating reaction in a hydrothermal reaction kettle, and performing vacuum freeze drying to obtain powdered sulfur-indium-zinc / gold / carbon nitride two-dimensionallamellar composite photocatalyst. By adoption of the method, easiness in raw material acquisition, one-kettle synthesis, high reliability and simplicity and convenience in operation are realized, andthe catalyst has high photocatalytic activity in a visible region and has a promising application prospect.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional layered composite photocatalyst of sulfur indium zinc gold carbon nitride. Background technique [0002] In 1972, Fujishima and Honda of the University of Tokyo found in experiments that in TiO 2 On the photoelectrode, water can be directly decomposed to produce hydrogen. After that, TiO 2 The photocatalytic degradation of organic pollutants under the irradiation of ultraviolet light has also made great progress. Semiconductor photocatalysis technology shows great application prospects. In order to further broaden the utilization range of photocatalytic materials and degrade organic matter under the irradiation of visible light, metal sulfides are widely used in the photocatalytic reaction of visible light because of their narrow band gap and can be used in a wide range Absorbs the visible light part of sunlight, but sulfides also generally suffer from photocorrosion, resulting in a ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/03B01J37/10C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24B01J37/036B01J37/10C02F2305/10C02F2101/40C02F2101/38C02F2101/34C02F2101/308B01J35/39B01J35/23
Inventor 王辉虎姚开元陈娜彭芝维常鹰董仕节
Owner HUBEI UNIV OF TECH
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