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Preparation method of cobalt-thiomolybdate photocatalyst

A cobalt thiomolybdate photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced surface area and weakened effect, and achieve good dispersion and crystal Uniform structure and good catalytic effect

Inactive Publication Date: 2018-01-12
柳州若思纳米材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles are easy to agglomerate, and after agglomeration, the surface area is greatly reduced, and the effect is weakened.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Add 5 g of cobalt dichloride to 100 mL of water to prepare a solution, then add 8 g of sodium molybdate and 1 g of glycine to the solution, stir in a water bath at 70°C for 50 minutes, keep stirring, at 25°C and normal pressure Slowly inject 6 L of hydrogen sulfide gas under low temperature, continue to stir for 20 minutes, transfer the solution to a hydrothermal reactor, react at 260 °C for 10 h, filter to obtain a solid, wash 5 times with distilled water, and dry at 80 °C, that is A cobalt thiomolybdate photocatalyst is obtained.

[0010] 0.4 g of cobalt thiomolybdate photocatalyst was added to 200 mL of methylene blue wastewater with a concentration of 35 mg / L, and reacted for 90 min under the irradiation of 120 W LED lamp, the decolorization rate was 95.7%, and the catalyst was separated and reused 5 times , under the same conditions, the reaction time was 90 min, and the decolorization rate was 91.4%.

Embodiment 2

[0012] Add 10 g of cobalt dichloride to 50 mL of water to prepare a solution, then add 11 g of sodium molybdate and 2 g of glycine to the solution, stir in a water bath at 60°C for 10 minutes, keep stirring, at 25°C and normal pressure Slowly inject 0.5L of hydrogen sulfide gas under low temperature, continue to stir for 10 minutes, transfer the solution to a hydrothermal reactor, react for 5 hours at 180°C, filter to obtain a solid, wash with distilled water 3 times, and dry at 80°C, that is A cobalt thiomolybdate photocatalyst is obtained.

[0013] 0.4 g of cobalt thiomolybdate photocatalyst was added to 200 mL of acid scarlet wastewater with a concentration of 35 mg / L, and reacted for 90 min under the irradiation of 120 W LED lamp, the decolorization rate was 98.7%, and the catalyst was separated and reused 5 times Finally, under the same conditions, the reaction was 90 min, and the decolorization rate was 93.1%.

Embodiment 3

[0015] Add 6 g of cobalt dichloride to 100 mL of water to prepare a solution, then add 9 g of sodium molybdate and 2 g of glycine to the solution, stir in a water bath at 70°C for 30 minutes, keep stirring, at 25°C and normal pressure Slowly inject 4 L of hydrogen sulfide gas under low temperature, continue to stir for 20 minutes, transfer the solution to a hydrothermal reactor, react at 260 °C for 10 h, filter to obtain a solid, wash with distilled water 5 times, and dry at 80 °C, that is A cobalt thiomolybdate photocatalyst is obtained.

[0016] 0.4 g of cobalt thiomolybdate photocatalyst was added to 200 mL of rhodamine B wastewater with a concentration of 35 mg / L, and reacted for 90 min under the irradiation of a 120 W LED lamp, the decolorization rate was 98.7%, and the catalyst was separated and reused for 5 After three times, under the same conditions, the reaction time was 90 min, and the decolorization rate was 91.9%.

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Abstract

The invention discloses a preparation method of a cobalt-thiomolybdate photocatalyst. The preparation method comprises the following steps of: adding 5-10g of cobalt dichloride into 50-100mL of waterto prepare into solution, then adding 8-11g of sodium molybdate and 1-2g of glycine into the solution, stirring for 10-50 minutes in water bath with the temperature of 60-70 DEG C, continuously stirring, slowly introducing 0.5-6L of hydrogen sulfide gas under the conditions of 25 DEG C and normal pressure, continuously stirring for 10-20 minutes, then transferring the solution into a hydrothermalreactor, reacting for 5-10 hours at the temperature of 180-260 DEG C, filtering to obtain solid, washing for 3-5 times by using distilled water, and drying at the temperature of 80 DEG C to obtain thecobalt-thiomolybdate photocatalyst. The preparation method disclosed by the invention has the advantages that the obtained cobalt-thiomolybdate photocatalyst is uniform in crystal structure and goodin dispersity and catalytic effect.

Description

technical field [0001] The invention relates to the field of new materials for environmental pollution control, in particular to a preparation method of cobalt thiomolybdate photocatalyst. Background technique [0002] With the development of science and technology, toxic organic pollutants from industrial and agricultural production seriously threaten the environment and human health. It is of great significance to seek a new and efficient environmental governance technology. Photocatalytic technology has become an emerging environmental treatment technology with important application prospects due to its advantages of energy saving, high efficiency, complete pollutant degradation, and no secondary pollution. In recent years, the development of new and efficient visible light photocatalysts has become an important research content in photocatalytic technology. Among them, photocatalytic materials with surface plasmon resonance effect, because of their unique surface physica...

Claims

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Application Information

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IPC IPC(8): B01J27/02
Inventor 程昊白大伟郝光明史智鹏
Owner 柳州若思纳米材料科技有限公司
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