Nanometer Ag3PO4-modified and TiO2 heterojunction photo-catalytic membrane material and preparing method thereof

A photocatalytic film, heterojunction technology, applied in chemical instruments and methods, physical/chemical process catalysts, coatings, etc., can solve the problem of reduced photocatalytic efficiency, large forbidden band width, and high electron-hole pair recombination efficiency. The problem is that the method is simple, the absorption of light is improved, and the photocatalytic degradation efficiency is improved.

Active Publication Date: 2018-02-09
JILIN NORMAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, due to its own reasons, TiO 2 There are still many shortcomings, such as its own large band gap (~3.2ev), only absorbs ultraviolet light (the overall utilization rate of sunlight is only 4%), and TiO 2 The recombination efficiency of electron-hole pairs generated during the photocatalytic process is very high, which seriously reduces its photocatalytic efficiency

Method used

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  • Nanometer Ag3PO4-modified and TiO2 heterojunction photo-catalytic membrane material and preparing method thereof
  • Nanometer Ag3PO4-modified and TiO2 heterojunction photo-catalytic membrane material and preparing method thereof
  • Nanometer Ag3PO4-modified and TiO2 heterojunction photo-catalytic membrane material and preparing method thereof

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Embodiment 1

[0034] A kind of nano-Ag in the present embodiment 3 PO 4 Modified TiO 2 A method for preparing a heterojunction photocatalytic film layer material, comprising the steps of:

[0035] S1, put 2cm 2 The pure titanium sample was treated with acid solution to remove oil and scale, and then ultrasonically cleaned in ethanol and deionized water for 5 minutes;

[0036] S2, using a bidirectional pulse power supply, using a pure titanium sample as an anode, a stainless steel electrolytic cell as a cathode, and a solution containing trisodium phosphate, ethylenediaminetetraacetic acid disodium salt, potassium hydroxide and silver nitrate as an electrolyte, under stirring conditions The micro-arc oxidation treatment is carried out under the following conditions; the configuration scheme of the electrolyte is to dissolve 8g of trisodium phosphate, 2g of ethylenediaminetetraacetic acid disodium salt and 1g of potassium hydroxide in 0.5L of deionized water to configure A solution, and 0....

Embodiment 2

[0040] S1, put 2cm 2 The pure titanium sample was treated with acid solution to remove oil and scale, and then ultrasonically cleaned in ethanol and deionized water for 5 minutes;

[0041] S2, using a bidirectional pulse power supply, using a TC4 titanium alloy sample as an anode, a stainless steel electrolytic cell as a cathode, and a solution containing trisodium phosphate, ethylenediaminetetraacetic acid disodium salt, potassium hydroxide and silver nitrate as an electrolyte, in The micro-arc oxidation deposition process was carried out under stirring conditions; the configuration of the electrolyte solution was to dissolve 8g of trisodium phosphate, 4g of ethylenediaminetetraacetic acid disodium salt and 2g of potassium hydroxide in 0.5L of deionized water to prepare A solution, and 1g Dissolve silver nitrate in 0.5L deionized water to prepare solution B. Slowly add solution B to solution A to obtain a clear electrolyte. The power supply mode adopts the constant voltage ...

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Abstract

The invention discloses a nanometer Ag3PO4-modified and TiO2 heterojunction photo-catalytic membrane material and a preparing method thereof and belongs to the technical field of nanometer material preparation. Representation is carried out on the prepared material by adopting testing means, such as an X-ray diffractometer, an X-ray photo-electron spectrometer, an ultraviolet spectrograph and a scanning electronic microscope. The process of the method comprises the following steps: first, in an electrolytic solution containing silver ions and phosphate ions, utilizing a micro-arc oxidation technology to prepare a TiO2 membrane containing Ag and P on a Ti plate substrate; then, sintering Ag and P precursors in the membrane through muffle furnace sintering to form Ag3PO4 nanometer particles;and finally forming the nanometer Ag3PO4 / TiO2 heterojunction photo-catalytic membrane. The method has the advantages that the preparing process is simple and easy to control, the operation is convenient, the cost is low, the photocatalytic activity of the membrane is high, and the photocatalytic activity can be regenerated through forging.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a nano Ag 3 PO 4 Modified TiO 2 Heterojunction photocatalytic film layer material and preparation method thereof. Background technique [0002] Since 1972, Japanese scientists A.Fujishima and K.Honda discovered TiO 2 After it has photocatalytic effect, it has attracted the interest of countless scientists and has become the most studied photocatalyst. TiO 2 As a photocatalyst to degrade organic pollutants, it has many advantages, such as strong catalytic activity, high stability, non-toxicity, and high environmental safety. In addition, TiO 2 The preparation raw materials are wide, the price is low, and the method is simple and easy, and is convenient for industrialization. Currently TiO 2 Has been widely used in wastewater treatment and environmental protection and other fields. However, due to its own reasons, TiO 2 There are still many shortcomings, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26B01J27/135
CPCB01J27/135C25D11/026C25D11/26
Inventor 常立民王海瑞孙桃
Owner JILIN NORMAL UNIV
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