Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst

A technology of titanium dioxide and silver phosphate, which is used in physical/chemical process catalysts, chemical instruments and methods, special compound water treatment, etc., to achieve the effects of high photocatalytic activity, improved activity and low cost

Active Publication Date: 2017-01-04
ANHUI UNIVERSITY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at this stage, there are few reports on the combination of silver phosphate and titanium dioxide to combine the excellent performance of the two in terms of photoresponse. Exploring simple and environmentally friendly synthetic methods is of great significance to scientific researchers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst
  • Preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst, comprising the steps of:

[0029] (1) in the polyvinyl alcohol solution that 40ml concentration is 2mol / L, add 0.002mol silver acetate and 40 μ L successively, the phosphoric acid aqueous solution of 85wt% (phosphoric acid aqueous solution density is 1.685g / ml), regulate the pH of solution with urotropine To 5.5, react under stirring;

[0030] (2) After the reaction in step (1) is over, add 0.001mol tetrabutyl titanate to the resulting mixture, adjust the pH of the solution to 3 with 10% dilute nitric acid, and react for 3 hours under a water bath condition of 75° C., The precipitate was collected by centrifugation, washed successively with absolute ethanol and water, and dried at 60°C for 8 hours to obtain catalyst 1.

Embodiment 2

[0032] A kind of preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst is characterized in that, comprises the steps:

[0033] (1) Add 0.006mol silver acetate and 60 μ L successively in 60ml concentration of polyvinyl alcohol solution of 2mol / L, 85wt% phosphoric acid aqueous solution, adjust pH to 5, react under agitation; The substance for adjusting pH is urotropine ;

[0034] (2) After the reaction in step (1) is over, add 0.002mol tetrabutyl titanate to the resulting mixture, adjust the pH of the solution to 2 with 10% dilute nitric acid, and react for 3 hours under the condition of a water bath at a temperature of 80°C. The precipitate was collected by centrifugation, washed successively with absolute ethanol and water, and dried at 70°C for 8 hours to obtain catalyst 2.

Embodiment 3

[0036] A kind of preparation method of fibrous silver phosphate-titanium dioxide composite photocatalyst is characterized in that, comprises the steps:

[0037] (1) Add 0.008mol silver acetate and 100 μ L successively in the polyvinyl alcohol solution of 2mol / L in 80ml concentration, 85wt% phosphoric acid aqueous solution, regulate solution pH to 6 with urotropine, react under agitation;

[0038] (2) After the reaction in step (1) is over, add 0.004mol tetrabutyl titanate to the resulting mixture, adjust the pH to 4 with 10% dilute nitric acid, react for 4 hours in a water bath with a temperature of 80° C., and take it by centrifugation. The precipitate was washed successively with absolute ethanol and water, and dried at 70°C for 8 hours to obtain catalyst 3.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a fibrous silver phosphate-titanium dioxide composite photocatalyst. The preparation method comprises following steps: a silver acetate aqueous solution and a phosphoric acid aqueous solution are added into a polyvinyl alcohol aqueous solution successively, pH value is adjusted to be 5 to 6, and reaction is carried out with stirring; tetrabutyl titanate is added into an obtained mixture, pH value is adjusted to 2 to 4, heating reaction is carried out for 2 to 4h at 70 to 80 DEG C in water bath, a precipitate is obtained via centrifugation, and is washed and dried so as to obtain the fibrous silver phosphate-titanium dioxide composite photocatalyst. The preparation method is capable of realizing successful synthesis of the fibrous silver phosphate-titanium dioxide composite photocatalyst, and at the same time, photoresponse performance of titanium dioxide and photoresponse performance of silver phosphate are combined, so that photocatalytic activity of the fibrous silver phosphate-titanium dioxide composite photocatalyst is improved greatly; the preparation method is simple; cost is low; energy saving and environment protection are realized, and no side product is generated; the obtained fibrous silver phosphate-titanium dioxide composite photocatalyst possesses a novel fibrous structure, and relatively high photocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of a fibrous silver phosphate-titanium dioxide composite photocatalyst. Background technique [0002] The sustainable development of human society and economy is increasingly confronted with the two major problems of energy shortage and environmental degradation. China, which is in a stage of rapid development, has a particularly urgent demand for research and development of clean energy and environmental protection technologies. Theoretically, using sunlight energy to produce hydrogen energy and degrade organic pollutants in the environment is an ideal way to solve the above problems, and the development of related technologies and new materials has broad prospects. [0003] In 1972, Japanese scientists such as Fujishima discovered TiO 2 Single-crystal electrodes can realize photocatalytic water splitting, and later discovered nano-TiO 2 It has the abili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C02F1/30
CPCC02F1/30B01J21/063B01J27/1817C02F2101/308C02F2305/10B01J35/19B01J35/58B01J35/39
Inventor 陈京帅牛和林毛昌杰张胜义宋吉明
Owner ANHUI UNIVERSITY