Preparation method of porous nano spherical zinc-cadmium sulfide solid solution

A technology of zinc cadmium sulfide and solid solution, which is applied in the field of photocatalytic materials, can solve the problems of low photocatalytic hydrogen production performance, high cost, and complicated preparation process, and achieve excellent promotion and application prospects and high-efficiency photocatalytic hydrogen production performance.

Pending Publication Date: 2019-08-09
DONGGUAN UNIV OF TECH
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Problems solved by technology

Although researchers are interested in Zn x Cd 1-x A lot of research has been done on S-type solid solution materials, but the photocatalytic hydrogen production performance of these materials is still low, the hydrogen production rate is low, and there is still a large distance from the needs of industrial production. At the same time, the preparation process is complicated, the cycle is long, and the cost is high.

Method used

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  • Preparation method of porous nano spherical zinc-cadmium sulfide solid solution
  • Preparation method of porous nano spherical zinc-cadmium sulfide solid solution
  • Preparation method of porous nano spherical zinc-cadmium sulfide solid solution

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preparation example Construction

[0026] A preparation method of porous nano-spherical zinc cadmium sulfide solid solution, comprising the following steps:

[0027] Step 1. Weigh Zn(Ac) according to the molar ratio of 0.8 to 1:1 2 2H 2 O, Cd(Ac) 2 2H 2 O is dissolved in the mixed solution of ethylene glycol and sodium hydroxide, and vigorously stirred at a speed of 600-800rpm for 1-3 hours; wherein, the concentration of sodium hydroxide in the mixed solution of ethylene glycol and sodium hydroxide is 0.08-0.12 mol L -1 ;

[0028] Step 2, add according to the following molar ratio: thiourea: Zn(Ac) 2 2H 2 O: Cd(Ac) 2 2H 2 O=4~5:1:1, add thiourea to the solution prepared in step 1, continue to stir at a speed of 800~1000rpm for 30~60min, and then continue to react at a reaction temperature of 160~180°C for 24~48h After the reaction, cool to room temperature to obtain a crude product, wash the crude product repeatedly with deionized water and absolute ethanol, centrifuge and recover the product, and vacu...

Embodiment 1

[0030] (1) Example 1: Preparation of porous nano-spherical zinc cadmium sulfide solid solution

[0031] 0.5mmoL Zn(Ac) 2 2H 2 O and 0.5mmol Cd(Ac) 2 2H 2 O dissolved in 10mL 0.1mol L -1 In the mixed solution of sodium hydroxide and ethylene glycol, after stirring at room temperature for 2h at a speed of 800rpm, add 2mmoL thiourea (CN 2 h 4 S), and the sodium hydroxide and ethylene glycol solution were fixed to 35ml, and after the above-mentioned suspension was stirred at a speed of 1000rpm for 30min, the reaction was continued at 160°C for 24h, and the reaction was repeatedly cleared with deionized water and absolute ethanol The resulting crude product was centrifuged to recover the product, and dried in vacuum at 60° C. for 12 hours to prepare a porous nano-spherical zinc-cadmium sulfide solid solution.

Embodiment 2

[0032] (2) Example 2: Preparation of porous nano-spherical zinc cadmium sulfide solid solution

[0033]1mmoL Zn(Ac) 2 2H 2 O and 1mmoL Cd(Ac) 2 2H 2 O dissolved in 20mL 0.12mol L -1 In the mixed solution of sodium hydroxide and ethylene glycol, after stirring at room temperature for 3h at a speed of 700rpm, add 4mmoL thiourea (CN 2 h 4 S), continue to stir the above suspension at 900rpm for 45min, continue to react at 170°C for 36h, use deionized water and absolute ethanol to repeatedly clear the crude product generated by the reaction, then centrifuge to recover the product, and dry it in vacuum at 65°C 11h, the porous nano-spherical zinc-cadmium sulfide solid solution was prepared.

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Abstract

The invention discloses a preparation method of a porous nano spherical zinc-cadmium sulfide solid solution and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: 1, dissolving Zn(Ac)2.2H2O and Cd(Ac)2.2H2O in a mixed solution of ethylene glycol and sodium hydroxide, and executing stirring vigorously; 2, adding thiourea into the solution prepared in the step 1, continuously stirring them, executing heating for reaction, executing cooling to room temperature after the reaction is finished to obtain a crude product, repeatedly washing the crude product with deionized water and absolute ethyl alcohol respectively, centrifugally recovering the product, and carrying out vacuum drying to obtain the porous nano spherical zinc-cadmiumsulfide solid solution. The preparation method is simple, a preparation period is short, the technological process is easy to control, and the porous nano spherical Zn0.5Cd0.5S solid solution materialprepared by the method has high-efficiency photocatalytic hydrogen production performance.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing a porous nano-spherical zinc-cadmium sulfide solid solution. Background technique [0002] Since the discovery of photocatalytic hydrogen production at the end of the 20th century, inorganic semiconductor materials have been at the forefront of the field of photocatalytic hydrogen production and are expected to replace traditional fossil fuels. So far, a variety of semiconductor photocatalysts, including metal and metalloid mixed oxides, sulfides and nitrides, doped perovskites, and nitrided pyrochlores, have been used in photocatalytic hydrogen production tests. However, its low catalytic activity and high preparation cost are still the key issues restricting the further development, application and large-scale industrial production of traditional photocatalysts. [0003] Among many semiconductor photocatalysts, Zn x Cd 1-x S solid solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/08B01J35/10C01B3/04
CPCB01J27/04B01J35/004B01J35/08B01J35/1019B01J35/1038B01J35/1057C01B3/042Y02E60/36
Inventor 宋金刚张刚廖文波刘恩豪何经力朱琳琳郑相锐范翠玲李康祥
Owner DONGGUAN UNIV OF TECH
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