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A kind of surface nickel phosphate modified titanium dioxide photocatalyst and its preparation method and application

A technology of titanium dioxide and photocatalyst, which is applied in the field of photocatalysis to achieve the effect of easy-to-obtain raw materials, simple preparation method and remarkable catalytic effect

Active Publication Date: 2020-06-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but Ni 3 (PO 4 ) 2 There are few reports in the literature on the application of photocatalysis

Method used

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  • A kind of surface nickel phosphate modified titanium dioxide photocatalyst and its preparation method and application
  • A kind of surface nickel phosphate modified titanium dioxide photocatalyst and its preparation method and application
  • A kind of surface nickel phosphate modified titanium dioxide photocatalyst and its preparation method and application

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preparation example Construction

[0042] The preparation method of the present invention is an ice bath deposition method. The specific measures are as follows: use commercial titanium dioxide as a semiconductor photocatalyst, use nickel salt as a nickel source, and use water as a solvent to adsorb nickel ions in the solution on the surface of the titanium dioxide. Then nickel ions were immobilized on the surface of titanium dioxide in the form of nickel phosphate with sodium phosphate under the condition of ice bath. Filter, wash and dry to obtain the surface nickel phosphate-modified titanium dioxide photocatalyst. This process does not change the physical properties of titanium dioxide itself such as crystallinity, crystal phase composition, average particle size, pore structure and specific surface area.

[0043] Compared with the traditional modification method, the method is simple to operate, easy to control the process, and has high repeatability.

Embodiment 1

[0045] Step 1: Weigh 0.2 g of commercial anatase, put it into 50 mL of deionized water, and ultrasonically disperse it for 5 minutes to obtain material A1.

[0046] Step 2, at room temperature, pipette 0.18mL of 50mM nickel perchlorate solution, put it into the suspension A1 obtained in step 1, and stir evenly for 2 hours in a dark state to obtain material B1;

[0047] Step 3: Add 2.5M sodium phosphate solution dropwise to the suspension B1 obtained in step 2 under ice bath conditions, and add excess sodium phosphate solution dropwise to obtain material C1 with light green precipitate.

[0048] In step four, the material C1 obtained in step three was washed and dried several times, and dried in an oven at 60° C. for 12 hours to obtain composite photocatalyst D1.

Embodiment 2

[0050] Step 1: Weigh 0.2 g of commercial anatase, put it into 50 mL of deionized water, and ultrasonically disperse it for 5 minutes to obtain material A2.

[0051] Step 2, at room temperature, pipette 0.36mL 50mM nickel perchlorate solution, put it into the suspension A2 obtained in step 1, and stir evenly for 2 hours in a dark state to obtain material B2;

[0052] Step 3: Add 2.5M sodium phosphate solution dropwise to the suspension B2 obtained in step 2 under ice bath conditions, and add excess sodium phosphate solution dropwise to obtain material C2 with light green precipitate.

[0053] In step four, the material C2 obtained in step three was washed and dried several times, and dried in an oven at 60° C. for 12 hours to obtain composite photocatalyst D2.

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Abstract

The invention provides a surface nickel phosphate modified titanium dioxide photocatalyst and its preparation method and use. The nickel phosphate is uniformly loaded on the surface of titanium dioxide powder particles in the form of solid powder. The present invention uses titanium dioxide or a precious metal-modified titanium dioxide photocatalyst as a precursor, nickel phosphate as a modification material, and uniformly deposits and disperses nickel phosphate particles on the surface of titanium dioxide powder particles through an ice bath deposition method. The present invention prepares a semiconductor photocatalyst with a nickel phosphate modified surface without changing the crystal structure, crystal phase composition and average particle size of the precursor titanium dioxide itself. The cost of raw materials is low, the equipment is simple, and it is easy to operate; compared with the simple semiconductor photocatalyst itself, the obtained photocatalyst has significantly improved ultraviolet and visible light catalytic activity, and at the same time, the mineralization of organic pollutants has also been greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, relates to a semiconductor photocatalytic surface modification method, and more specifically provides a preparation method of a surface nickel phosphate-modified titanium dioxide photocatalyst and an application of ultraviolet photocatalytic degradation of organic matter. Background technique [0002] In the 21st century, environmental pollution and energy shortages have become major problems that human beings face and need to be solved urgently. In order to solve these problems, we urgently need to find a kind of energy regeneration and environment-friendly treatment technology. As we all know, solar energy in nature has the advantages of cleanness, high efficiency, and regeneration, and the solar radiation energy reaching the earth's surface is huge, which is one of the best energy sources that can be exploited and utilized at present. Semiconductor photocatalysis is an advanced oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01D53/86B01D53/72C01B3/04
CPCB01J27/1853B01J27/1856B01D53/8668C01B3/042C01B2203/0277C01B2203/107C01B2203/1058B01J35/39Y02E60/36
Inventor 王亚如许宜铭
Owner ZHEJIANG UNIV
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