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Preparation method of load type silver phosphate/silver sulfide composite photocatalyst

A technology of silver phosphate and silver sulfide, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of easy shedding and catalyst loss, and achieve the effect of firm bonding and not easy to fall off.

Active Publication Date: 2014-08-20
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

Strontium pyrophosphate is a better material, which can be used as a raw material for catalyst preparation and as a catalyst carrier, but the general loading mechanism is to directly cover the surface of the carrier, and this contact is physical contact, which is easy to fall off lead to loss of catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 100g of strontium pyrophosphate ore that has passed through a 40-mesh sieve after grinding, and fill it in a glass tube controlled by a valve at the top and bottom; prepare HNO with a concentration of 0.2mol / L respectively 3 Solution 200mL, NaNO with a concentration of 0.1mol / L 3 Solution 400mL and concentration of 0.8mol / L AgNO 3 Solution 200mL; put the glass tube filled with pyrophosphate upright, open the upper and lower valves, and inject HNO into the tube from the bottom 3 solution, when the solution can submerge the porous hydroxyapatite, discharge HNO 3 solution, keep the bottom valve open and inject NaNO from the top 3 solution, let NaNO 3 The solution is injected from the top and flows out from the bottom, then close the valve at the bottom and inject AgNO from the top 3 After soaking in the solution for 30min, the AgNO 3 The solution is released from the bottom, and the particles in the glass tube are washed with deionized water and dried to obtain ...

Embodiment 2

[0016] Weigh 80g of strontium pyrophosphate ore that has passed through a 40-mesh sieve after grinding, and fill it in a glass tube controlled by a valve at the top and bottom; prepare HNO with a concentration of 0.02mol / L respectively 3 Solution 200mL, NaNO with a concentration of 0.01mol / L 3 Solution 400mL and concentration of 0.2mol / L AgNO 3 Solution 200mL; put the glass tube filled with pyrophosphate upright, open the upper and lower valves, and inject HNO into the tube from the bottom 3 solution, when the solution can submerge the porous hydroxyapatite, discharge HNO 3 solution, keep the bottom valve open and inject NaNO from the top 3 solution, let NaNO 3 The solution is injected from the top and flows out from the bottom, then close the valve at the bottom and inject AgNO from the top 3 After soaking in the solution for 20min, the AgNO 3 The solution is released from the bottom, and the particles in the glass tube are washed with deionized water and dried to obtain...

Embodiment 3

[0019] Weigh 90g of strontium pyrophosphate ore that has passed through a 40-mesh sieve after grinding, and fill it in a glass tube controlled by a valve at the top and bottom; prepare HNO with a concentration of 0.1mol / L respectively 3 Solution 200mL, NaNO with a concentration of 0.1mol / L 3 Solution 400mL and concentration of 0.5mol / L AgNO 3 Solution 200mL; put the glass tube filled with pyrophosphate upright, open the upper and lower valves, and inject HNO into the tube from the bottom 3 solution, when the solution can submerge the porous hydroxyapatite, discharge HNO 3 solution, keep the bottom valve open and inject NaNO from the top 3 solution, let NaNO 3 The solution is injected from the top and flows out from the bottom, then close the valve at the bottom and inject AgNO from the top 3 After soaking in the solution for 25min, the AgNO 3 The solution is released from the bottom, and the particles in the glass tube are washed with deionized water and dried to obtain a...

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PUM

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Abstract

The invention discloses a preparation method of a load type silver phosphate / silver sulfide composite photocatalyst. The preparation method comprises the following steps: weighing grinded 80-100g of svanbergite which is filtered by a 40-mesh sieve; filling a glass tube the upper and lower parts of which are controlled through valves with svanbergite; separately preparing a 200ml HNO3 solution with the concentration being 0.02-0.2mol / L, 400ml NaNO3 solution with the concentration being 0.01-0.1mol / L, and 200ml AgNO3 solution with the concentration being 0.2-0.8mol / L; vertically arranging the glass tube filled with svanbergite, switching on the upper and lower valves and injecting the HNO3 solution to the tube from the bottom; discharging the HNO3 solution when porous hydroxyapatite is submersed by the solution; keeping the switching on of the bottom valve and injecting the NaNO3 solution from the top, so as to enable the NaNO3 solution to flow out from the bottom after the NaNO3 solution is injected from the top; switching off the bottom valve; injecting the AgNO3 solution from the upper end, then soaking for 20-30 minutes, discharging the AgNO3 solution from the bottom; washing the particular matters in the glass tube with deionized water and drying to obtain the load type silver phosphate / silver sulfide composite photocatalyst.

Description

technical field [0001] The invention relates to a preparation method of a loaded silver phosphate / silver sulfide composite 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] Sichuan, my country has abundant reserves of strontium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18
Inventor 马建锋王凯李良银姚超
Owner 无锡智慧兴宜信息技术有限公司