High-efficiency nano silver/silver bromide sunshine photocatalytic material and preparation method thereof

A technology of photocatalytic material and silver bromide, applied in the direction of physical/chemical process catalyst, chemical instrument and method, chemical/physical process, etc. Low efficiency and other problems, to achieve the effect of direct and efficient utilization, low cost, and simple preparation process

Inactive Publication Date: 2010-09-01
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems that the P25 photocatalytic material has a low utilization rate of solar energy and the preparation method of "Wang's catalyst" is complicated, and the effect is not very ideal, and provides a more efficient direct sunlight photocatalytic material and its preparation process is very simple. Preparation

Method used

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  • High-efficiency nano silver/silver bromide sunshine photocatalytic material and preparation method thereof
  • High-efficiency nano silver/silver bromide sunshine photocatalytic material and preparation method thereof
  • High-efficiency nano silver/silver bromide sunshine photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Prepare micron-sized silver bromide: silver nitrate (AgNO 3 ) solution, add 0.2g of CTAB, after stirring for 5min, add 4mL formic acid (weight concentration greater than 88%) successively; described formic acid; and 2.5mL ammonia water (weight concentration is 25%-28%), then transfer to high pressure React in the kettle at 100°C for 2 hours, and finally separate and wash the product to obtain light yellow micron-sized silver bromide (AgBr).

[0024] (2) Preparation of nano-silver / silver bromide sunlight photocatalytic material: disperse the light yellow silver bromide obtained in step (1) in water, expose it to indoor light for 1 hour, the light yellow turns into gray, and the silver bromide Partially decomposes into simple silver, which is evenly distributed on the surface of silver bromide. Then the product is separated and dried to obtain the nano-silver / silver bromide solar photocatalytic material. The particle size of the silver bromide is 1-3 μm, and the par...

Embodiment 2

[0026] (1) Preparation of micron-sized silver bromide: AgNO in 10mL 0.02mol / L 3 Add 0.25g of CTAB to the solution, stir for 8min, then add 5mL HCOOH and 3mL NH 3 ·H 2 O, and then transferred to an autoclave at 120°C for 5 hours of reaction, and finally the product was separated and washed to obtain light yellow micron-sized AgBr.

[0027] (2) Preparation of nano-silver / silver bromide sunlight photocatalytic material: the light yellow silver bromide obtained in step (1) is dispersed in absolute ethanol, exposed to indoor light for 1 hour, the light yellow is converted into gray, Silver bromide is partially decomposed into silver element, which is evenly distributed on the surface of silver bromide. Then the product is separated and dried to obtain the nano-silver / silver bromide solar photocatalytic material. The particle size of the silver bromide is 1-3 μm, and the particle size of the nano-silver is 8-14 nm.

Embodiment 3

[0029] (1) Preparation of micron-sized silver bromide: AgNO in 10mL 0.025mol / L 3 Add 0.3g of CTAB to the solution, stir for 10min, then add 6mL HCOOH and 3.5mL NH 3 ·H 2 O, then transferred to an autoclave at 130 ° C for 2 hours, and finally the product was separated and washed to obtain light yellow micron-sized AgBr.

[0030] (2) Preparation of nano-silver / silver bromide sunlight photocatalytic material: disperse the light yellow silver bromide obtained in step (1) in water, expose to indoor light for 5 hours, the light yellow is converted into gray, silver bromide Partially decomposes into simple silver, which is evenly distributed on the surface of silver bromide. Then the product is separated and dried to obtain the nano-silver / silver bromide solar photocatalytic material. The particle size of the silver bromide is 1-3 μm, and the particle size of the nano-silver is 8-14 nm.

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Abstract

The invention discloses a high-efficiency nano silver/silver bromide sunshine photocatalytic material and a preparation method thereof. The material consists of the nano silver and the micron-sized silver bromide, and the chemical formula is Ag/AgBr; and the nano silver is uniformly distributed on the surface of the silver bromide, the grain size of the silver bromide is 1 to 3 mu m, and the grain size of the silver bromide is 8 to 14 nm. Compared with the prior art, the prepared nano silver/silver bromide sunshine photocatalytic material can be used for purifying pollutants in water and sterilizing; the effect is much better than that of the conventional commonly used photocatalytic material P25 and a recently developed 'Wang catalyst'; the material can directly use solar energy with high efficiency, the photocatalytic ability is almost not decreased after being recycled for many times; and meanwhile, the nano silver/silver bromide sunshine photocatalytic material has the advantages of simple and convenient preparation process, low cost, and suitability for industrial production.

Description

Technical field: [0001] The invention belongs to solar photocatalytic materials and a preparation method thereof, in particular to a nano-silver / silver bromide solar photocatalytic material for purifying water pollutants and sterilizing bacteria and a preparation method thereof. technical background: [0002] People are facing challenges of water shortage and serious pollution. According to investigations, there are thousands of chemical pollutants in tap water alone, directly threatening human health. In the context of the worldwide energy crisis, in order to seek effective and low-consumption purification methods, solar energy has attracted widespread attention from scientists because of its abundant sources and green cleanliness. Solar energy can be said to be an inexhaustible source of energy for human beings. The total energy that reaches the earth in a year is about 10,000 times that of the current annual energy consumption in the world. But unfortunately, the utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08C02F1/30
Inventor 耿保友蒯龙
Owner ANHUI NORMAL UNIV
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