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Synthesizing method of playgouskite-loaded silver orthophosphate photochemical catalyst

A technology of attapulgite and synthesis method, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., and can solve the problems of large band gap, high cost, and poor sewage treatment, etc. problem, to achieve the effect of uniform distribution and easy separation

Active Publication Date: 2012-08-08
无锡智慧兴宜信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved
TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2 eV), can only absorb light in the ultraviolet region (wavelength less than 387 nm), and the utilization efficiency of solar energy is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 20 mmol of silver nitrate and configure it into a 20 mmol / L solution, weigh 6.6 mmol of disodium hydrogen phosphate and configure it into a 20 mmol / L solution; mix these two solutions at a speed of 350 rpm to form a yellow-green Colloidal substance, kept stirring for 3 h; 5 g of attapulgite was added to 50 mL of water, dispersed in ultrasonic for 60 min, then added to the generated silver phosphate colloid, continued to stir for 6 h, aged for 24 h, centrifuged to collect the solid, and Dry at 105°C to obtain attapulgite-supported silver phosphate photocatalyst.

[0019] Add 0.5 g of the obtained attapulgite-supported silver phosphate photocatalyst into 500 mL of rhodamine B wastewater with a concentration of 30 mg / L, react for 30 min under the irradiation of a 500w metal halide lamp, the decolorization rate is 99.1%, and the catalyst is separated Simple and can be reused.

Embodiment 2

[0021] Weigh 24 mmol of silver nitrate and configure it into a 20 mmol / L solution, weigh 8 mmol of disodium hydrogen phosphate and configure it into a 20 mmol / L solution; mix the above two solutions at a speed of 400 rpm to form a yellow-green Colloidal substance, keep stirring for 4h; add 8 g of attapulgite to 60 mL of water, disperse in ultrasonic for 70 min, then add to the generated silver phosphate colloid, continue to stir for 8 h, age for 24 h, centrifuge to collect the solid, at 105 The attapulgite-supported silver phosphate photocatalyst was obtained by drying at ℃.

[0022] Add 0.5 g of the obtained attapulgite-supported silver phosphate photocatalyst into 500 mL of golden orange II wastewater with a concentration of 35 mg / L, and react for 30 min under the irradiation of a 500w metal halide lamp. The decolorization rate is 98.5%, and the catalyst is separated Simple and can be reused.

Embodiment 3

[0024] Weigh 22 mmol of silver nitrate and configure it into a 20 mmol / L solution, weigh 7 mmol of disodium hydrogen phosphate and configure it into a 20 mmol / L solution; the two solutions will be mixed at a speed of 380 rpm to form a yellow-green color Colloidal substance, keep stirring for 3.5 h; add 6 g of attapulgite to 55 mL of water, disperse in ultrasonic for 65 min, then add to the generated silver phosphate colloid, continue to stir for 7 h, age for 24 h, centrifuge to collect the solid, and Dry at 105°C to obtain attapulgite-supported silver phosphate photocatalyst.

[0025] Add 0.5 g of the obtained attapulgite-supported silver phosphate photocatalyst into 500 mL of acid scarlet wastewater with a concentration of 40 mg / L, and react for 30 minutes under the irradiation of a 500w metal halide lamp. The decolorization rate is 98.8%, and the separation of the catalyst is simple. , can be reused.

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Abstract

The invention discloses a synthesizing method of a playgouskite-loaded silver orthophosphate photochemical catalyst, which belongs to the technical filed of sewage treatment in environmental protection. The method comprises the flowing steps of mixing 20 mmol / L of silver nitrate solution and 20 mmol / L of disodium hydrogen phosphate solution at a rotation speed of 350-400 rpm, and continuously mixing for 3-4 h so as to obtain silver nitrate colloid; and adding 5-8 g of attapulgite into 50-60 ml of water, dispersing under ultrasonic waves for 60-70 min, adding into the silver nitrate colloid, stirring for 6-8 h, aging for 24 h, centrifuging, collecting solid, and drying at temperature of 105 DEG C so as to obtain the catalyst. According to the method, the nano rod-shape large outer surface of the attapulgite is utilized, silver nitrate is loaded on the outer surface so that the light can be received advantageously , the generated silver nitrate colloid is easily attached to the huge outer surface of the attapulgite and can be distributed uniformly, further the outer surface of the attapulgite can be utilized effectively, and the silver nitrate still can play a nano effect and can be speared from the water.

Description

technical field [0001] The invention relates to a synthesis method of attapulgite loaded silver phosphate photocatalyst, which belongs to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2 eV), can only absorb light in the ultraviolet region (wavelength less than 387 nm), and the utilization efficiency of solar energy is low. In June 2010, researchers from the Material Research Institute found that silver phosphate has the effect of photocatalyst, and the photooxidation effect is more than ten tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J35/10C02F1/30
CPCY02W10/37
Inventor 马建锋崔冰莹姚超张天立
Owner 无锡智慧兴宜信息技术有限公司
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