Preparation method of cobalt phosphate-assisted silver phosphate photocatalyst

A cobalt phosphate and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced catalyst degradation performance and easy self-corrosion.

Inactive Publication Date: 2017-08-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the instability of silver phosphate itself, it is easy to self-erode in...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 24mmol silver nitrate, configure it into a 20mmol / L silver nitrate solution, weigh 8mmol disodium hydrogen phosphate, configure it into a 20mmol / L disodium hydrogen phosphate solution; mix the above two solutions at a speed of 400 rpm , form a yellow-green colloidal substance, continue to stir for 4 hours, during the stirring process, disodium hydrogen phosphate and silver nitrate react to generate silver phosphate colloid; place the silver phosphate colloid in a semi-permeable membrane bag, wash 4 times with distilled water, and remove free ions, then add the silver phosphate colloid to 80mL of cobalt nitrate solution with a concentration of 2mol / L, soak for 3 days, form cobalt phosphate nanoparticles on the surface of silver phosphate particles, separate solid from liquid, wash the solid with deionized water 3 times, Dry at 105°C to prepare a cobalt phosphate assisted silver phosphate photocatalyst.

[0014] Add 0.3 g of the obtained cobalt phosphate assisted si...

Embodiment 2

[0016] Take by weighing 20mmol silver nitrate, configure the silver nitrate solution of 20mmol / L, take by weighing 6.6mmol disodium hydrogen phosphate, configure the disodium hydrogen phosphate solution of 20mmol / L; Mix to form a yellow-green colloidal substance, and continue to stir for 3 hours. During the stirring process, disodium hydrogen phosphate and silver nitrate react to form silver phosphate colloid; place the silver phosphate colloid in a semi-permeable membrane bag, wash 3 times with distilled water, remove Remove free ions, then add the silver phosphate colloid to 60mL cobalt nitrate solution with a concentration of 1mol / L, soak for 1 day, form cobalt phosphate nanoparticles on the surface of silver phosphate particles, separate solid from liquid, and wash the solid twice with deionized water , and dried at 75°C to prepare a cobalt phosphate-assisted silver phosphate photocatalyst.

[0017] Add 0.3 g of the obtained cobalt phosphate assisted silver phosphate photo...

Embodiment 3

[0021] Weigh 24mmol silver nitrate, configure it into a 20mmol / L silver nitrate solution, weigh 8mmol disodium hydrogen phosphate, configure it into a 20mmol / L disodium hydrogen phosphate solution; mix the above two solutions at a speed of 400 rpm , form a yellow-green colloidal substance, continue to stir for 4 hours, during the stirring process, disodium hydrogen phosphate and silver nitrate react to generate silver phosphate colloid; place the silver phosphate colloid in a semi-permeable membrane bag, wash 4 times with distilled water, and remove free ions, then add the silver phosphate colloid to 60mL of cobalt nitrate solution with a concentration of 2mol / L, soak for 3 days, form cobalt phosphate nanoparticles on the surface of silver phosphate particles, separate solid from liquid, wash the solid with deionized water 3 times, Dry at 95°C to prepare a cobalt phosphate assisted silver phosphate photocatalyst.

[0022] Add 0.3 g of the obtained cobalt phosphate assisted sil...

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Abstract

The invention discloses a preparation method of a cobalt phosphate-assisted silver phosphate photocatalyst. The preparation method specifically comprises the following steps of mixing silver nitrate and a sodium hydrogen phosphate solution, so as to form a yellow green gel matter; continuing to stir for 3 to 4h, enabling the sodium hydrogen phosphate and the silver nitrate to react in the stirring process, and generating a silver nitrate gel; adding the silver nitrate gel into a semi-transparent film bag, washing for 3 to 4 times by distilled water, removing free ions, adding the silver nitrate gel into a 60 to 80mL cobalt nitrate solution with concentration of 1 to 2mol/L, soaking for 1 to 3 days, and forming cobalt phosphate nanoparticles at the surface of the silver phosphate particle, so as to prepare the cobalt phosphate-assisted silver phosphate photocatalyst. The preparation method has the advantage that an auxiliary catalyst is compounded onto the surface of a main catalyst, so that the stability and the catalyzing effect of the main catalyst are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a cobalt phosphate-assisted silver phosphate photocatalyst, belonging 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. The development and application of nanotechnology is likely to completely solve this problem. 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=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] Semiconductor photocatalysis is one of the most promising app...

Claims

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Application Information

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IPC IPC(8): B01J27/185C02F1/30C02F101/34C02F101/36C02F101/38
CPCY02W10/37B01J27/1853B01J35/004C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/10
Inventor 张鑫宇赵文昌冯婷
Owner CHANGZHOU UNIV
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