A kind of preparation method of silver phosphate-cadmium sulfide composite visible light photocatalyst

A technology of photocatalyst and cadmium sulfide, which is applied in the field of photocatalytic material preparation, can solve the problems of poor stability of silver phosphate photocatalyst and difficulty in controlling the morphology and structure, and achieve the advantages of large-scale production and preparation, abundant raw materials, cheap and easy raw materials The effect

Inactive Publication Date: 2016-08-17
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of poor stability of silver phosphate photocatalyst and difficult to control its morphology and structure, and further improve its catalytic performance and utilization efficiency, the present invention provides a silver phosphate-cadmium sulfide composite visible light photocatalyst with strong absorption performance for visible light

Method used

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  • A kind of preparation method of silver phosphate-cadmium sulfide composite visible light photocatalyst
  • A kind of preparation method of silver phosphate-cadmium sulfide composite visible light photocatalyst
  • A kind of preparation method of silver phosphate-cadmium sulfide composite visible light photocatalyst

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Embodiment 1

[0025] First, take trisodium citrate and dissolve it in deionized water to prepare 100 ml of a solution with a concentration of 0.1 moles per liter. Weigh 0.02 mole of cadmium sulfide and add it into the above solution, and sonicate for 10 minutes to form a uniformly dispersed turbid solution. Weigh 0.02 mole of silver nitrate and add it into the above mixed solution, and stir at room temperature for 10 minutes to obtain a silver-citric acid complex solution. At room temperature, 0.01 mol / L ammonium dihydrogen phosphate aqueous solution was added dropwise to the above mixed solution and vigorously stirred to obtain a yellow turbid solution. The obtained yellow-brown turbid liquid was centrifuged with a centrifuge, and after centrifuging at a speed of 4500 rpm for 10 minutes, the colorless solution in the centrifuge tube was removed to obtain a yellow precipitated product. The obtained yellow precipitate was washed ultrasonically with deionized water and washed at 50 o Drying...

Embodiment 2

[0027] First, take trisodium citrate and dissolve it in deionized water to prepare 100 ml of a solution with a concentration of 0.2 moles per liter. Weigh 0.04 mole of cadmium sulfide and add it to the above solution, and sonicate for 20 minutes to form a uniformly dispersed turbid solution. Weigh 0.04 moles of silver nitrate and add it into the above mixed solution, and stir at room temperature for 20 minutes to obtain a silver-citric acid complex solution. At room temperature, 0.015 mol / L ammonium dihydrogen phosphate aqueous solution was added dropwise to the above mixed solution and vigorously stirred to obtain a yellow turbid solution. The obtained yellow-brown turbid liquid was centrifuged with a centrifuge, and after centrifuging at a speed of 4000 rpm for 10 minutes, the colorless solution in the centrifuge tube was removed to obtain a yellow precipitated product. The obtained yellow precipitate was washed ultrasonically with deionized water and washed at 50 o Drying...

Embodiment 3

[0029] First, trisodium citrate was weighed and dissolved in deionized water to prepare 100 ml of a solution with a concentration of 0.3 moles per liter. Weigh 0.06 mole of cadmium sulfide and add it to the above solution, and sonicate for 10 minutes to form a uniformly dispersed turbid solution. Weigh 0.06 mol of silver nitrate and add it into the above mixed solution, and stir at room temperature for 10 minutes to obtain a silver-citric acid complex solution. At room temperature, 0.02 mol / L ammonium dihydrogen phosphate aqueous solution was added dropwise to the above mixed solution with vigorous stirring to obtain a yellow turbid solution. The obtained yellow-brown turbid liquid was centrifuged with a centrifuge, and after centrifuging at a speed of 3000 rpm for 10 minutes, the colorless solution in the centrifuge tube was removed to obtain a yellow precipitated product. The obtained yellow precipitate was washed ultrasonically with deionized water and washed at 50 o Dryi...

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Abstract

The invention relates to an Ag3PO4-CdS composite photocatalyst and a preparation method thereof, belonging to the field of photocatalytic material preparation. The invention uses trisodium citrate and cadmium sulfide particles to control the shape and size of the silver phosphate. The specific steps are as follows: firstly, the cadmium sulfide is uniformly dispersed in the trisodium citrate aqueous solution, and then the silver nitrate is dissolved in the above mixed turbid solution. Further, the pre-prepared ammonium dihydrogen phosphate aqueous solution was added dropwise thereto under vigorous stirring, the reaction system appeared yellow and turbid, and the product was centrifuged, washed and dried to obtain the visible light catalytic material. The preparation process of the invention is simple, and the obtained visible light catalyst has high stability and strong catalytic activity, has good degradation ability to rhodamine B and other organic dyes, and has good application prospects in the fields of sewage treatment and the like.

Description

technical field [0001] The present invention relates to Ag 3 PO 4 The invention discloses a -CdS composite photocatalyst and a preparation method thereof, belonging to the field of photocatalytic material preparation. Background technique [0002] The development of modern industrial technology has greatly improved the quality of life of human beings, but at the same time it has also brought serious environmental pollution problems, resulting in many public hazards such as Minamata disease in Japan that shocked the world, which has aroused people's great attention to environmental issues. The problem of water pollution is particularly prominent due to the lack of global freshwater resources, and the prevention and control of water pollution is imminent. Traditional sewage treatment is unsatisfactory due to its shortcomings such as high cost, low efficiency, and inability to completely remove pollution. Canadian scientist Carey introduced TiO in 1976 2 The application of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18
Inventor 徐波陈志明李建伟李村成
Owner UNIV OF JINAN
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