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Method for preparing p-CoO/n-CdS compound semiconductor photocatalyst

A compound semiconductor and photocatalyst technology, applied in the field of photocatalytic materials, can solve problems that have not been reported in the literature, and achieve the effects of reducing photocorrosion, increasing specific surface area, and improving separation efficiency

Inactive Publication Date: 2010-07-07
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no literature reports on the research on p-CoO / n-CdS composite semiconductor photocatalysts

Method used

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  • Method for preparing p-CoO/n-CdS compound semiconductor photocatalyst
  • Method for preparing p-CoO/n-CdS compound semiconductor photocatalyst
  • Method for preparing p-CoO/n-CdS compound semiconductor photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Preparation of CdS solid powder product:

[0036] Anhydrous ammonium sulfate: 24%

[0037] Anhydrous cadmium sulfate: 11%

[0038] Thiourea: 5%

[0039] Deionized water: 60%

[0040] The preparation of CdS solid powder product is according to anhydrous ammonium sulfate: anhydrous cadmium sulfate: thiourea: the ratio by weight of deionized water is 24%: 11%: 5%: 60%, anhydrous ammonium sulfate, anhydrous sulfuric acid Mix cadmium, thiourea and deionized water, pre-react for 0.5h in a microwave reactor with a power of 500W, and then react at 80°C for 10h under ultrasonic dispersion with a frequency of 53KHZ and a power of 350W to obtain a reaction product; the reaction product After filtration, the yellow CdS primary solid powder cake was obtained; the CdS primary solid powder cake was added to deionized water 5 times its weight, washed with deionized water, ultrasonically dispersed for 1 hour and filtered, and the above operation was repeated three times to obtain the...

Embodiment 2

[0048] Preparation of CdS solid powder product:

[0049] Anhydrous Ammonium Chloride: 34.5%

[0050] Cadmium nitrate tetrahydrate: 15.4%

[0051] Thiourea: 7.1%

[0052] Deionized water: 50%

[0053] The preparation of CdS solid powder product is according to anhydrous ammonium chloride: cadmium nitrate tetrahydrate: thiourea: the ratio by weight of deionized water is 34.5%: 15.4%: 7.1%: 50%, anhydrous ammonium chloride, tetrahydrate Water cadmium nitrate, thiourea and deionized water are mixed, firstly reacted in a microwave reactor with a power of 300W for 1h, and then reacted at 90°C for 5h under ultrasonic dispersion with a frequency of 53KHZ and a power of 250W to obtain the reaction product; The product was filtered to obtain a yellow CdS primary solid powder cake; the CdS primary solid powder cake was added to deionized water 5 times its weight, washed with deionized water, ultrasonically dispersed for 1 hour and filtered, and the above operation was repeated three tim...

Embodiment 3

[0061] Preparation of CdS solid powder product:

[0062] Trimethylamine Sulfate: 12%

[0063] Anhydrous cadmium chloride: 12.8%

[0064] Thiourea: 10.2%

[0065] Deionized water: 65%

[0066] The preparation of CdS solid powder product is according to trimethylamine sulfate: anhydrous cadmium chloride: thiourea: the ratio by weight of deionized water is 12%: 12.8%: 10.2%: 65%, trimethylamine sulfate, anhydrous Mix cadmium chloride, thiourea and deionized water, pre-react in a microwave reactor with a power of 600W for 0.5h, and then react at 85°C for 4h under ultrasonic dispersion with a frequency of 53KHZ and a power of 200W to obtain a reaction product; The reaction product was filtered to obtain a yellow CdS primary solid powder cake; the CdS primary solid powder cake was added to deionized water 5 times its weight, washed with deionized water, ultrasonically dispersed for 1 hour and filtered, and the above operation was repeated three times to obtain a CdS secondary sol...

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Abstract

The invention discloses a method for preparing a p-CoO / n-CdS compound semiconductor photocatalyst, which comprises the following steps: in a ratio of the weight percentage of ammonium salt to cadmium salt to thiocarbamide to deionized water of (0.001 to 90 percent): (0.001 to 70 percent): (0.001 to 90 percent): (0.001 to 90 percent), mixing the ammonium salt, cadmium salt, thiocarbamide and deionized water for reaction, filtering, washing, roasting and grinding to obtain CdS solid powder; and in a ratio of the weight percentage of CdS solid powder to cobalt salt to ammonia water to deionized water of (0.001 to 90 percent): (0.001 to 70 percent): (0.001 to 90 percent): (0.001 to 90 percent), mixing the cobalt salt, ammonia water and deionized water for reaction, adding the CdS solid powder for three times, and performing stirring, ultrasonic dispersion, distillation at reduced pressure, heat treatment, washing, filtering, roasting and grinding to obtain the p-CoO / n-CdS compound semiconductor photocatalyst by. The prepared p-CoO / n-CdS compound semiconductor photocatalyst can be applied to photocatalytic degradation of organic pollutants, photocatalytic decomposition of water for hydrogen production and manufacture of solar cells under the condition that ultraviolet light, visible light and sunlight are used as light sources respectively.

Description

technical field [0001] The invention relates to a preparation method of a p-CoO / n-CdS composite semiconductor photocatalyst, belonging to the field of photocatalytic materials. Background technique [0002] With the acceleration of the global industrialization process, the sharp increase in energy consumption, the depletion of fossil fuels, the deepening of the oil crisis, environmental crisis and energy crisis, the development and utilization of renewable energy has become a hot spot of global concern. Solar energy is the most abundant energy available to human beings. It is an inexhaustible, inexhaustible, pollution-free, cheap energy that can be used freely and peacefully by all countries in the world. It is also a variety of renewable energy such as biomass energy, wind energy, Ocean energy, water energy and other energy sources. For this reason, the governments of various countries attach great importance to the development and utilization of solar energy, and the deve...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J37/34B01J37/08
Inventor 刘福生杜欢刘恋恋李振刘忠祥卢南
Owner NANJING FORESTRY UNIV
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