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Preparation method for feather-keratin-modified cadmium sulfide photocatalyst

A technology of feather keratin and photocatalyst, which is applied in the field of preparation of cadmium sulfide photocatalyst, can solve the problems of easy compounding and low photocatalytic activity of CdS

Inactive Publication Date: 2015-06-24
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a photocatalytic material, CdS also has some disadvantages. The photogenerated electrons and holes generated by CdS under visible light irradiation are easy to recombine, resulting in a relatively low photocatalytic activity of CdS.

Method used

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  • Preparation method for feather-keratin-modified cadmium sulfide photocatalyst
  • Preparation method for feather-keratin-modified cadmium sulfide photocatalyst
  • Preparation method for feather-keratin-modified cadmium sulfide photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0046] Weigh 0.02 g of feather keratin, disperse it in 10 ml of 2 mol / L urea solution, and bathe in water at 65°C for 30 min to obtain a completely soluble feather keratin solution; add 0.004 g of dithiothreitol (DDT), Stir for 10 min; then add 20ml of Cd(Ac) successively under stirring 2 2H 2 O solution (0.01M), 20ml Na 2 S aqueous solution (0.01), sonicated for 30 min, and then the mixed solution was placed in a water bath at 80 °C for 8 h, the product was washed with distilled water and absolute ethanol, and dried at 60 °C for 12 h to obtain the FK / CdS composite material, in which feather keratin ( FK) accounted for 1.37% respectively. The degradation rate of rhodamine B is 60%.

Embodiment 2

[0048] Weigh 0.04 g of feather keratin, disperse it in 10 ml of 2 mol / L urea solution, and bathe in water at 65°C for 30 min to obtain a completely soluble feather keratin solution; add 0.004 g of dithiothreitol (DDT), Stir for 10 min; then add 20ml of Cd(Ac) successively under stirring 2 2H 2 O solution (0.01M), 20ml Na 2 S aqueous solution (0.01), sonicated for 30 min, and then the mixed solution was placed in a water bath at 80 °C for 8 h, the product was washed with distilled water and absolute ethanol, and dried at 60 °C for 12 h to obtain the FK / CdS composite material, in which feather keratin ( FK) accounted for 2.70% respectively. The degradation rate of Rhodamine B is 80%.

Embodiment 3

[0050] Weigh 0.06 g of feather keratin, disperse it in 10 ml of 2 mol / L urea solution, and bathe in water at 65°C for 30 min to obtain a completely soluble feather keratin solution; add 0.004 g of dithiothreitol (DDT), Stir for 10 min; then add 20ml of Cd(Ac) successively under stirring 2 2H 2 O solution (0.01M), 20ml Na 2 S aqueous solution (0.01), sonicated for 30 min, and then the mixed solution was placed in a water bath at 80 °C for 8 h, the product was washed with distilled water and absolute ethanol, and dried at 60 °C for 12 h to obtain the FK / CdS composite material, in which feather keratin ( FK) accounted for 3.99% respectively. The degradation rate of Rhodamine B is 98%.

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Abstract

The invention discloses a preparation method for a feather-keratin-modified cadmium sulfide photocatalyst. The preparation method comprises the following steps: dispersing feather keratin into a urea aqueous solution, and performing water bath to obtain a completely soluble feather keratin solution; adding dithiothreitol, stirring for reducing for a certain time, then adding Cd(Ac)2.2H2O solution and an Na2S solution in sequence under stirring, and performing ultrasonic processing; then, performing water bath on the mixed solution for 6-8 hours at 80-100 DEG C; and finally, washing with distilled water and absolute ethyl alcohol, and drying to obtain the feather-keratin-modified cadmium sulfide photocatalyst. According to the photocatalytic degradation experimental results, the feather-keratin-modified cadmium sulfide photocatalyst prepared by the preparation method has relatively good photocatalysis performances in comparison with single cadmium sulfide, and has a wide application prospect in photocatalytic degradation of organic pollutants.

Description

technical field [0001] The invention belongs to the field of composite materials and the technical field of photocatalysis, and relates to a preparation method of a feather keratin-modified cadmium sulfide photocatalyst. Background technique [0002] With the growth of population and the intensification of global industrialization, environmental pollution has become a global problem, threatening human health, especially the discharge of organic wastewater, which has added difficulties to urban wastewater treatment institutions. Therefore, the treatment of organic wastewater pollutants will be a major problem facing the world. The use of photocatalysts to degrade organic pollutants in water has achieved certain research results in the past few decades. Especially semiconductor photocatalysts have good application prospects in catalytic degradation of organic pollutants in wastewater. [0003] CdS is a typical IIB–VIA semiconductor photocatalyst. Because of its relatively na...

Claims

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Application Information

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IPC IPC(8): B01J31/26
Inventor 王其召连菊红顾素敏侯国蓉李琼马琼童金辉王荣民苏碧桃
Owner NORTHWEST NORMAL UNIVERSITY
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