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Method for preparing Ag/TiO2 nano composite material

A technology of nanocomposite materials and target materials, which is applied in the field of preparation of Ag/TiO2 nanocomposite materials, can solve the problems that the superior performance of nanocomposite materials cannot be effectively exerted, and achieve the reduction of the forbidden band width, broaden the application range, and high The effect of reactivity

Inactive Publication Date: 2011-09-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the presence of these reagents in the synthesis process, more organic reagent molecules will remain on the surface of the synthesized sample (the specific surface of the nanomaterial is large and the adsorption force is strong), thus, Ag / TiO 2 The superior performance of nanocomposites cannot be effectively exerted

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  • Method for preparing Ag/TiO2 nano composite material
  • Method for preparing Ag/TiO2 nano composite material
  • Method for preparing Ag/TiO2 nano composite material

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Embodiment Construction

[0017] A Ag / TiO 2 The preparation method of nano composite material is characterized in that comprising the following steps:

[0018] (1) Immerse the titanium element target in deionized water, use Nd:YAG pulsed laser with a wavelength of 1064nm, energy 95mJ, and ablate the titanium element target for 15-25 minutes to obtain amorphous TiO X colloid;

[0019] (2) Under the condition of avoiding light, to the above TiO X Add silver nitrate solution dropwise to the colloid so that the silver ion concentration of the solution is 5-15μM, and the ultrasonic dispersion is uniform for 8-12min;

[0020] (3) The above-mentioned uniformly dispersed solution is subjected to hydrothermal treatment in a high-pressure reactor for 14-18 hours, and the temperature is controlled at 170-190 ° C to obtain Ag / TiO 2 nanocomposites.

[0021] figure 1 for different TiO X The XRD results of the colloidal solution after hydrothermal treatment, a) TiO without silver ions X Colloidal solution, the...

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Abstract

The invention discloses a method for preparing an Ag / TiO2 nano composite material. Firstly liquid phase laser erosion is utilized to produce a TiOX colloid, and a silver nitrate solution is added to carry out hydro-thermal treatment, thus the Ag / TiO2 nano composite material is obtained. The TiOX colloid in the invention has small particles and high reaction activity; the method is characterized in that no organic reagent such as a reducing agent and a stabilizing agent is added; red shift is produced on light absorption of silver modified titanium dioxide, the forbidden bandwidth is reduced, and the utilization factor to sunlight can be effectively improved; and the method provides a new approach and thinking for realizing modification on a semiconductor material by virtue of ultramicro precious metal nano particles, meanwhile, the application range of the liquid phase laser erosion is widened.

Description

technical field [0001] The present invention relates to a kind of nano TiO 2 The preparation method of composite material, be specifically related to a kind of Ag / TiO 2 Preparation methods of nanocomposites. Background technique [0002] Due to TiO 2 It has the characteristics of good chemical stability, strong antibacterial ability, and low price, and has broad application prospects in the fields of photocatalysis, solar cells, and sewage treatment. However, due to its large forbidden band width (~3.2 eV), it can only respond in the ultraviolet region, the absorption and utilization efficiency of sunlight is low, and the recombination rate of photogenerated hole-electron pairs is fast, which restricts its application and development. In view of this, people have adopted many methods to treat TiO 2 Modified to improve its performance. Among them, there are two most studied ones, one is the nano-structure of the material itself, the surface effect and quantum size effec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C22C1/10
Inventor 梁长浩张和民刘俊田振飞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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