Preparation method of Ag-AgBr/TiO2 nanorod composite array film

A technology of nanorod arrays and composite arrays, which is applied in the field of photocatalytic material preparation, can solve the problems of low photoelectrochemical performance of sunlight photocatalytic activity, low utilization of sunlight, limited practical application, etc., and achieves a simple preparation route and avoids agglomeration. phenomenon, the effect of low interfacial charge transport resistance

Active Publication Date: 2020-09-01
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, single-phase TiO 2 With a large band gap (3.0-3.2eV), it can only be excited by ultraviolet light, and the utilization rate of sunlight is very low; at the same time, the high photogenerated electron-hole recombination efficiency makes its photon quantum efficiency low, resulting in low Photoelectrochemical performance and solar photocatalytic activity limit its practical application

Method used

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  • Preparation method of Ag-AgBr/TiO2 nanorod composite array film
  • Preparation method of Ag-AgBr/TiO2 nanorod composite array film
  • Preparation method of Ag-AgBr/TiO2 nanorod composite array film

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Experimental program
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Effect test

Embodiment 1

[0034] (1) Cut the FTO conductive glass into a suitable size of 2.5cm×5cm with a glass knife, and then use acetone, deionized water and absolute ethanol to ultrasonically clean it for 20 minutes to remove dust and pollutants on the glass surface, and then measure 15mL of concentrated hydrochloric acid (37%) and 0.5mL tetrabutyl titanate, add 15mL deionized water, stir at room temperature for 30min, stirring speed 200r / min, then pour it into 50mL of cleaned FTO glass (conductive side down) at the bottom In the liner of the high-pressure reactor, react under hydrothermal conditions at 150°C for 12h, take out the sample and wash it three times with absolute ethanol and deionized water, and dry it at 60°C for 10h to obtain the product TiO 2 Nanorod array films;

[0035] (2) Dissolve 0.1mmol sodium hydroxide in 35mL deionized water, add 0.1g hexadecyltrimethylammonium bromide and 1mmol silver nitrate successively to the above solution under magnetic stirring conditions, and continu...

Embodiment 2

[0039] (1) Cut the FTO conductive glass into a suitable size of 1.5cm×4cm with a glass knife, and use acetone, deionized water and absolute ethanol to clean it ultrasonically for 40 minutes to remove dust and pollutants on the glass surface, and then measure 15mL of concentrated hydrochloric acid (37%) and 0.5mL tetrabutyl titanate, add 15mL deionized water, stir at room temperature for 40min, stirring speed 180r / min, then pour it into 75mL of cleaned FTO glass (conductive side down) at the bottom In the liner of the high-pressure reactor, react under hydrothermal conditions at 160°C for 12h, take out the sample and wash it with absolute ethanol and deionized water for 5 times, and dry it at 80°C for 15h to obtain the product TiO 2 Nanorod array films;

[0040] (2) Dissolve 0.1mmol of hexamethylenetetramine in 35mL of deionized water, and add 0.1g of hexadecyltrimethylammonium bromide and 1mmol of silver nitrate to the above solution successively under magnetic stirring condit...

Embodiment 3

[0044] (1) Cut the FTO conductive glass into a suitable size of 2.5cm×5cm with a glass knife, and then use acetone, deionized water and absolute ethanol to ultrasonically clean it for 30 minutes to remove dust and pollutants on the glass surface, and then measure 15mL of concentrated hydrochloric acid (37%) and 0.5mL tetrabutyl titanate, add 15mL deionized water, stir at room temperature for 30min, stirring speed 200r / min, then pour it into 50mL of cleaned FTO glass (conductive side down) at the bottom In the liner of the high-pressure reactor, react under hydrothermal conditions at 150°C for 12h, take out the sample and wash it three times with absolute ethanol and deionized water, and dry it at 60°C for 12h to obtain the product TiO 2 Nanorod array films;

[0045] (2) Dissolve 0.08mmol sodium hydroxide in 35mL deionized water, add 0.1g hexadecyltrimethylammonium bromide and 1mmol silver nitrate successively to the above solution under magnetic stirring conditions, and contin...

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Abstract

The invention belongs to the field of photocatalytic materials, and particularly relates to a preparation method of an Ag-AgBr/TiO2 nanorod composite array film. Active components of the composite film are Ag-AgBr and TiO2 nanorod arrays, and the structure of the composite film is formed by growing of one-dimensional TiO2 nanorod array modified by Ag-AgBr heterojunction nanoparticles on the surface of FTO conductive glass. The preparation method provided by the invention is easy to operate and control, does not involve expensive equipment, and is suitable for large-scale production. The Ag-AgBr/TiO2 nanorod composite array prepared by the preparation method disclosed by the invention has the advantages that; the surface plasmon resonance effect and the heterostructure are combined, the expanded sunlight spectral response range, the efficient photon-generated carrier separation efficiency, the good photoelectrochemical performance and the visible-light-driven photocatalytic activity aredisplayed, and the degradation rates onrhodamine B and methyl orange under visible light can reach 58% and 80% respectively.

Description

technical field [0001] The invention belongs to the field of preparation of photocatalytic materials, in particular to an Ag-AgBr / TiO 2 A method for preparing a nanorod composite array thin film. Ag-AgBr / TiO prepared by the present invention 2 As a photocatalyst, the nanorod composite array film has achieved good photocatalytic effect for visible light degradation of rhodamine B and methyl orange. Background technique [0002] In recent years, TiO 2 Because of its good biocompatibility, high photocatalytic activity, stable chemical performance, low cost and non-toxicity, it is regarded as an ideal material to solve environmental problems and energy crisis. Especially one-dimensional TiO 2 Nanoarray materials, due to their large aspect ratio, high specific surface area and fast electron transfer efficiency, have a wide range of applications in the fields of solar cells, photocatalytic water splitting or photocatalytic degradation of toxic organic small molecules, electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J35/02B01J35/10C02F1/30C02F101/38
CPCB01J27/08B01J35/0033B01J35/004B01J35/026B01J35/1004C02F1/30C02F2305/10C02F2101/38C02F2101/40
Inventor 王艳芬程详刘银李孟婷高娟徐初阳
Owner ANHUI UNIV OF SCI & TECH
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