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Catalyst for catalytic degradation of pollutants by ultraviolet light and preparation method of catalyst

A catalytic degradation and catalyst technology, which is applied in the field of pollutant treatment, can solve the problems of harsh reaction conditions, high cost, and long reaction time, and achieve the effects of mild reaction conditions, easy operation, and improved efficiency

Inactive Publication Date: 2015-06-03
赵莎莎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing methods have disadvantages such as harsh reaction conditions, long reaction time, high cost, and low catalytic efficiency, making it difficult to carry out large-scale production.
This limits its application in practical

Method used

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  • Catalyst for catalytic degradation of pollutants by ultraviolet light and preparation method of catalyst
  • Catalyst for catalytic degradation of pollutants by ultraviolet light and preparation method of catalyst
  • Catalyst for catalytic degradation of pollutants by ultraviolet light and preparation method of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: 10g tetrabutyl titanate (TBT), 0.089g cadmium acetate dihydrate (Cd(Ac) 2 2H 2 O), 7mL acetic acid, 120mL methanol and 5.6g polyvinylpyrrolidone (PVP) were poured into a 250mL Erlenmeyer flask. After stirring at room temperature for 4-8h, PVP / Cd(Ac) was obtained 2 - TBT sol precursor. After electrospinning the above precursor, calcined at 500°C for 4h, cooled at room temperature, uniformly dispersed in the aqueous solution of 0.05g thioacetamide dissolved, after hydrothermal reaction at 70°C for 12h, washed with water and ethanol three times respectively, centrifuged and dried in vacuum , making 1% CdS-TiO 2 catalyst. Take 100mg catalyst and disperse it in 1L 20mg / L -1 In the methyl orange solution, after dark adsorption for 30min, UV light was applied, and 5mL supernatant was taken out at regular intervals to test its absorbance, and the reaction was terminated after 5h.

Embodiment 2

[0023] Embodiment 2: 10g tetrabutyl titanate (TBT), 0.267g cadmium acetate dihydrate (Cd(Ac) 2 2H 2 O), 7mL acetic acid, 120mL methanol and 5.6g polyvinylpyrrolidone (PVP) were poured into a 250mL Erlenmeyer flask. After stirring at room temperature for 4-8h, PVP / Cd(Ac) was obtained 2 - TBT sol precursor. After electrospinning the above precursor, calcined at 500°C for 4h, cooled at room temperature, uniformly dispersed in the aqueous solution of 0.15g of thioacetamide dissolved, after hydrothermal reaction at 70°C for 12h, washed with water and ethanol three times respectively, centrifuged and dried in vacuum , made 3%CdS-TiO 2 catalyst. Take 100mg catalyst and disperse it in 1L 20mg / L -1 In the methyl orange solution, after dark adsorption for 30min, UV light was applied, and 5mL supernatant was taken out at regular intervals to test its absorbance, and the reaction was terminated after 5h.

Embodiment 3

[0024] Embodiment 3: 10g tetrabutyl titanate (TBT), 0.445g cadmium acetate dihydrate (Cd(Ac) 2 2H 2 O), 7mL acetic acid, 120mL methanol and 5.6g polyvinylpyrrolidone (PVP) were poured into a 250mL Erlenmeyer flask. After stirring at room temperature for 4-8h, PVP / Cd(Ac) was obtained 2 - TBT sol precursor. After electrospinning the above precursor, calcined at 500°C for 4h, cooled at room temperature, uniformly dispersed in an aqueous solution of 0.25g of thioacetamide dissolved, reacted hydrothermally at 70°C for 12h, washed with water and ethanol three times, centrifuged, and dried in vacuum , making 5% CdS-TiO 2 catalyst. Take 100mg catalyst and disperse it in 1L 20mg / L -1 In the methyl orange solution, after dark adsorption for 30min, UV light was applied, and 5mL supernatant was taken out at regular intervals to test its absorbance, and the reaction was terminated after 5h.

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Abstract

The invention discloses a preparation method of a catalyst for catalytic degradation of pollutants by ultraviolet light. The preparation method comprises the step of preparation of cadmium acetate, titanate and a PVP (polyvinyl pyrrolidone) precursor, and is characterized in that a cadmium sulfide and titanium dioxide catalyst is prepared with the process of first electrostatic spinning and later hydrothermal vulcanization. Cadmium salt is uniformly mixed into fiber with an electrostatic spinning method, and cadmium oxide is vulcanized with a hydrothermal method, so that cadmium sulfide is uniformly dispersed into the fiber; the reaction condition is mild, operation is simple and convenient, and the catalyst efficiency is high. Therefore, the preparation method has certain application value in the aspect of catalytic degradation of the pollutants by the ultraviolet light.

Description

technical field [0001] The design of the invention belongs to the field of pollutant treatment. Specifically, it relates to a preparation method of a catalyst for photodegradation of organic pollutants. technical background [0002] Environmental pollution is mainly chemical pollution, especially dye pollutants that are difficult to biodegrade. The treatment of such pollution usually adopts methods such as physical adsorption and chemical oxidation. Titanium dioxide has high chemical stability, strong oxidation, low cost, and no pollution, and it can effectively catalyze and degrade various pollutants under ultraviolet light irradiation. Therefore, titanium dioxide is recognized as the most effective catalyst for treating sewage (Steinberg M. International Journal of Hydrogen Energy, 1999, 24(8):771-777.). However, due to the large band gap (3.2eV) of titanium dioxide, it can only absorb ultraviolet light, but ultraviolet light only accounts for less than 5% of solar ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/32C02F1/62
CPCY02W10/37
Inventor 赵莎莎
Owner 赵莎莎
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