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Metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and preparation method

An ethylenediamine light and metal modification technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of high photogenerated electron-hole recombination rate, high Poor photochemical stability, low photon efficiency, etc., to achieve the effects of good chemical stability, easy operation and low preparation cost

Inactive Publication Date: 2017-04-26
TIANJIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, traditional Zn x Cd 1-x The shortcomings of S solid solution, such as small specific surface area, poor dispersion in aqueous solution, high photogenerated electron-hole recombination rate, low photon quantum efficiency and poor photochemical stability, severely limit its wide application in the field of photocatalysis.

Method used

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  • Metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and preparation method
  • Metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and preparation method
  • Metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Nickel-modified sulfur-zinc-cadmium (Ni / Zn 0.6 Cd 0.4 The preparation method of S)-ethylenediamine photocatalyst comprises the following steps:

[0044] (1) Mix cadmium acetate, zinc acetate and sulfur to urine in a molar ratio of 1:1.5:8 to obtain a mixture, take 5g of the mixture and add it to 100ml of ethylenediamine, stir to obtain a transparent solution, heat it in water at 180°C for 12h, and cool to room temperature, centrifuged, and the solid was washed with distilled water and dried to obtain Zn 0.6 Cd 0.4 S-ethylenediamine hybrid nanosheets;

[0045] (2) Add 2gZn 0.6 Cd 0.4 S-ethylenediamine hybrid nanosheets dispersed in 2ml 0.2M NiCl 2 In the aqueous solution, disperse evenly, and evaporate the water at 60°C to obtain Ni 2+ Modified Zn 0.6 Cd 0.4 S-ethylenediamine hybrid nanosheets;

[0046] (3) the Ni obtained by 2g step (2) 2+ Modified Zn 0.6 Cd 0.4 S-ethylenediamine hybrid nanosheets were dispersed in 50ml of deionized water, adding ...

Embodiment 2

[0049] Example 2 Cobalt-modified sulfur-zinc-cadmium (Co / Zn 0.9 Cd 0.1 Preparation of S)-ethylenediamine photocatalyst

[0050] (1) Mix cadmium acetate, zinc acetate and sulfur to urine in a molar ratio of 1:9:30 to obtain a mixture, take 8g of the mixture and add it to 100ml of ethylenediamine, stir to obtain a transparent solution, heat it in water at 200°C for 36h, and cool to room temperature, centrifuged, and the solid was washed with distilled water and dried to obtain Zn 0.9 Cd 0.1 S-ethylenediamine hybrid nanosheets;

[0051] (2) 3gZn 0.9 Cd 0.1 S-ethylenediamine hybrid nanosheets dispersed in 3ml 0.4M CoCl 2 In the aqueous solution, the dispersion is uniform, and the water is evaporated at 70°C to obtain Co 2+ Modified Zn 0.9 Cd 0.1 S-ethylenediamine hybrid nanosheets;

[0052] (3) 3gCo 2+ Modified Zn 0.9 Cd 0.1 S-ethylenediamine hybrid nanosheets were dispersed in 50ml of deionized water, adding NaOH to adjust the pH to 13, heating to 70°C, adding 0.3g o...

Embodiment 3

[0056] Example 3 NiCo / Zn 0.8 Cd 0.2 Preparation of S-ethylenediamine photocatalyst

[0057] (1) Mix cadmium acetate, zinc acetate, and sulfur to urine in a molar ratio of 1:4:15 to obtain a mixture, take 10 g of the mixture and add it to 100 ml of ethylenediamine, stir to obtain a transparent solution, heat at 220°C for 48 hours, and cool to room temperature, centrifuged, and the solid was washed with distilled water and dried to obtain Zn 0.8 Cd 0.2 S-ethylenediamine hybrid nanosheets;

[0058] (2) 5gZn 0.8 Cd 0.2 S-ethylenediamine hybrid nanosheets dispersed in 5ml 0.5M NiCl 2 and 0.5MCoCl 2 In the mixed aqueous solution, the dispersion is uniform, and the water is evaporated to dryness at 80°C to obtain Ni 2+ -Co 2+ Modified Zn0.8 Cd 0.2 S-ethylenediamine hybrid nanosheets.

[0059] (3) the Ni obtained by 5g step (2) 2+ -Co 2+ Modified Zn 0.8 Cd 0.2 S-ethylenediamine hybrid nanosheets were dispersed in 50ml of deionized water, adding NaOH to adjust the pH to ...

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Abstract

The invention discloses a metal or metalloid modified zinc cadmium sulfide-ethylenediamine photocatalyst and a preparation method. The preparation method of the metal modified zinc cadmium sulfide-ethylenediamine photocatalyst comprises the following steps that (1) ZnxCd1-xS-ethylenediamine hybrid nanosheets are prepared; (2) metal ion modified ZnxCd1-xS-ethylenediamine hybrid nanosheets are prepared; and (3) the metal modified zinc cadmium sulfide-ethylenediamine photocatalyst is prepared. The method is simple in process, easy and convenient to operate and low in preparation cost, and the prepared metal or metalloid compound modified ZnxCd1-xS-ethylenediamine photocatalyst is highly dispersed in water and has high visible light catalysis water-splitting hydrogen production performance and good chemical stability.

Description

technical field [0001] The invention relates to a photocatalytic material and a preparation method thereof, in particular to sulfur zinc cadmium (Zn x CD 1-x The invention discloses a S)-ethylenediamine photocatalyst and a preparation method thereof, which belong to the technical field of synthesis of nanometer photocatalytic materials and photocatalysis. Background technique [0002] Solar photocatalytic hydrogen production is one of the hotspots in the field of energy research. [0003] CdS with wurtzite structure is one of the most widely studied sulfide photocatalysts because of its relatively narrow bandgap (2.4eV) and the ability to absorb sunlight with a wavelength of <510nm. Its flat band potential of -0.87V is also very suitable for the reduction of water, and its valence band potential of 1.5V (vsNHE) can theoretically oxidize water. Preparation of Zn by compounding CdS and wide bandgap semiconductor ZnS x CD 1-x S solid solution can significantly improve i...

Claims

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Application Information

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IPC IPC(8): B01J31/28C01B3/04
CPCC01B3/042B01J31/28C01B2203/1076C01B2203/1052C01B2203/1058B01J35/39Y02E60/36
Inventor 王希涛王康
Owner TIANJIN UNIV
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