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Method for improving visible light catalytic performance of Ag3PO4

A catalytic performance and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex visible light catalytic performance and process, and achieve improved visible light catalytic effect, low cost and high efficiency Effect

Inactive Publication Date: 2014-09-03
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to provide a method to improve Ag 3 PO 4 Visible photocatalytic performance approach to address existing Ag 3 PO 4 The complex problem of visible light catalytic performance

Method used

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  • Method for improving visible light catalytic performance of Ag3PO4
  • Method for improving visible light catalytic performance of Ag3PO4
  • Method for improving visible light catalytic performance of Ag3PO4

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Spherical Ag 3 PO 4 Put it in a muffle furnace, raise the temperature to 380°C in an air atmosphere, keep it warm for 1h, and then cool it down to room temperature naturally to obtain the sintered Ag 3 PO 4 .

[0025] Take 0.1g of Ag before sintering 3 PO 4 Add the sample to 100mL rhodamine B with a concentration of 10mg / L, and stir for 30min in the dark, then take a sample every two minutes under the irradiation of visible light, centrifuge to take the supernatant, measure the absorbance, record the data, and draw it into a graph . The same method for the sintered Ag 3 PO 4 The samples were subjected to visible light catalysis experiments. See the experimental results figure 1 , the visible light catalytic degradation effect of the sintered sample is better than that before sintering, which is increased by nearly 10%.

Embodiment 2

[0027] Spherical Ag 3 PO 4 Put it in a muffle furnace, raise the temperature to 400°C in an air atmosphere, keep it warm for 1.5h, and then cool it down to room temperature naturally to obtain the sintered Ag 3 PO 4 .

[0028] Take 0.1g of Ag before sintering 3 PO 4 Add the sample to 100mL rhodamine B with a concentration of 10mg / L, and stir for 30min in the dark, then take a sample every two minutes under the irradiation of visible light, centrifuge to take the supernatant, measure the absorbance, record the data, and draw it into a graph . The same method for the sintered Ag 3 PO 4 The samples were subjected to visible light catalysis experiments. See the experimental results figure 2 , the visible light catalytic degradation effect of the sintered sample is better than that before sintering, which is nearly 37.5% higher. Example 3

Embodiment 3

[0029] Spherical Ag 3 PO 4 Put it in a muffle furnace, raise the temperature to 420°C in an air atmosphere, keep it warm for sintering for 2 hours, and then cool it down to room temperature naturally to obtain the sintered Ag 3 PO 4 .

[0030] Take 0.1g of Ag before sintering 3 PO 4 Add the sample to 100ml Rhodamine B with a concentration of 10mg / L, and stir for 30min in the dark, then take a sample every two minutes under visible light irradiation, centrifuge to take the supernatant, measure the absorbance, record the data, and draw it into a graph . The same method for the sintered Ag 3 PO4 The samples were subjected to visible light catalysis experiments. See the experimental results image 3 , the visible light catalytic degradation effect of the sintered sample is better than that before sintering, which is increased by nearly 21%.

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Abstract

The invention discloses a method for improving the visible light catalytic performance of Ag3PO4. The method comprises the following steps of putting silver phosphate into a muffle furnace, heating to 380-420 DEG C under an air atmosphere, performing heat-preservation sintering for 1-2 hours, and naturally cooling to the room temperature to obtain silver phosphate with the improved visible light catalytic performance. The silver phosphate is spherical silver phosphate or rhombic dodecahedron silver phosphate. The method is simple; the prepared silver phosphate is directly sintered, so that the visible light catalytic effect of a silver phosphate finished product is improved by 8-37.5 percent. According to the method disclosed by the invention, the specific atmosphere protection is not required, and the sintering can be performed under the air atmosphere only by using the common muffle furnace. The method is low in cost, high in efficiency and suitable for industrial application.

Description

technical field [0001] The invention relates to the field of fine chemical technology, in particular to a method for improving Ag 3 PO 4 Approaches to visible light catalytic performance. Background technique [0002] With the increasingly serious environmental pollution, which threatens the survival and development of human beings, it is more and more urgent to study new and efficient materials to control the environment. Semiconductor photocatalysts use sunlight to catalyze the oxidation of pollutants, which is highly efficient and environmentally friendly, and has attracted much attention in recent years. Traditional Anatase TiO 2 The bandgap width of photocatalyst is about 3.2eV. It has outstanding advantages such as high stability, strong photocatalytic ability, non-toxic and pollution-free, and has been widely studied and utilized in the field of photocatalysis. However, Ti0 2 The photoresponse range of photocatalysts is mainly distributed in the ultraviolet regio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18
Inventor 顾修全张双强颖怀朱磊赵宇龙
Owner CHINA UNIV OF MINING & TECH
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