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A method for preparing single-crystal anatase tio2 nanorod arrays with superhydrophilic properties

A nanorod array and anatase technology, applied in the field of preparation of TiO2 nanorod array, can solve the problems of uneven diameter, short time, complicated operation process, etc., and achieve the effects of low equipment requirements, large output and high efficiency

Active Publication Date: 2019-01-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The template method is a method of assembling nanostructure elements into template holes to form nanorods, but it needs to be combined with electrochemical deposition, direct deposition, sol-gel method and other methods, and the operation process is relatively complicated; anodic oxidation method By changing parameters such as anodization voltage, electrolyte composition, electrolyte pH value and electrolysis time, the diameter, tube length, tube wall thickness and shape of nanotubes can be controlled, but the tube length of nanotubes prepared by water-based electrolyte is always difficult. It breaks through a few microns, and the tube wall has obvious steps and uneven tube diameters; MOCVD is to make the reaction precursor (metal organic compound) into a gas state under high temperature heating conditions, and then under the carrier gas transportation, in the low temperature area The method of forming the desired target product through chemical reaction on the substrate, generally, the time required for this method is shorter, and the purity of the synthesized target product is higher, but the requirements for experimental equipment are high, and the process is complicated

Method used

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  • A method for preparing single-crystal anatase tio2 nanorod arrays with superhydrophilic properties
  • A method for preparing single-crystal anatase tio2 nanorod arrays with superhydrophilic properties
  • A method for preparing single-crystal anatase tio2 nanorod arrays with superhydrophilic properties

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Experimental program
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Effect test

Embodiment 1

[0034] The precursor of the reactant is: TiCl 4 As Ti source, with H 2 O is used as the source of O, and HCl is used as the inhibitor. Measure 40ml of 4mol / L hydrochloric acid solution, add it to the inner lining of the autoclave, stir slowly with a magnetic stirrer, and measure 0.30ml of TiCl with a pipette gun 4 The solution was slowly added dropwise to the polytetrafluoroethylene lining of the autoclave, and after stirring for 20 minutes, the ITO glass sheet was vertically placed in the lining, and the autoclave was placed in an oven, heated to 160°C, and kept for 5 hours , take the reactor out of the oven, cool to room temperature, take the ITO glass sample out of the PTFE lining, rinse the sample with deionized water, and dry it at 80°C, place the sample in a muffle furnace, air Under ambient conditions, heat to 350°C, keep warm for 1h, and cool to room temperature. See the attached table for the results.

Embodiment 2

[0036] The precursor of the reactant is: TiCl 4 As Ti source, with H 2 O is used as the source of O, and HCl is used as the inhibitor. Measure 40ml of 6mol / L hydrochloric acid solution, add it to the inner lining of the autoclave, stir slowly with a magnetic stirrer, and measure 0.45ml of TiCl with a pipette gun 4 The solution was slowly added dropwise to the polytetrafluoroethylene lining of the autoclave, and after stirring for 20 minutes, the ITO glass sheet was vertically placed in the lining, and the autoclave was placed in an oven, heated to 200°C, and kept for 7 hours , take the reactor out of the oven, cool to room temperature, take the ITO glass sample out of the PTFE liner, rinse the sample with deionized water, and dry it at 90°C, place the sample in a muffle furnace, air Under ambient conditions, heat to 450°C, keep warm for 2h, and cool to room temperature. See the attached table for the results.

Embodiment 3

[0038] The precursor of the reactant is: TiCl 4 As Ti source, with H 2 O is used as O source, HCl is used as inhibitor, measure 40ml of 8mol / L hydrochloric acid solution, add it to the lining of the autoclave, stir slowly with a magnetic stirrer, and measure 0.50ml of TiCl with a pipette gun 4 The solution was slowly added dropwise to the polytetrafluoroethylene lining of the autoclave, and after stirring for 20 minutes, the ITO glass sheet was vertically placed in the lining, and the autoclave was placed in an oven, heated to 180°C, and kept for 11 hours , take the reactor out of the oven, cool to room temperature, take the ITO glass sample out of the PTFE liner, rinse the sample with deionized water, and dry it at 100°C, place the sample in a muffle furnace, air Under ambient conditions, heat to 450°C, keep warm for 3h, and cool to room temperature. See the attached table for the results.

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Abstract

The invention relates to a method for preparing a monocrystalline anatase TiO2 nanorod array with superhydrophilicity. According to the method, TiCl4 is used as a Ti source, H2O is used as an O source, and HCl is used as an inhibitor; the TiO2 nanorod array is formed on an ITO (indium tin oxide) conducting film through a hydrothermal method; and the diameter of the nanorod is 50-800 nm, and the length is 0.25-10 mu m. The method uses no catalyst, effectively solves the recovery problem in the nano material use process, and has the advantages of simple process, low cost and short reaction time; the prepared crystal achieves favorable crystallization and high purity; and the TiO2 nanorod array has superhigh hydrophilicity and can greatly improve the photocatalytic performance. The morphology and composition of the TiO2 nanorod array can be controlled by changing process conditions.

Description

technical field [0001] The present invention relates to TiO 2 Preparation methods of nanorod arrays. Background technique [0002] TiO 2 Due to the advantages of wide source of raw materials, cheap price, simple production, and good stability, the material has broad application value in the degradation of organic pollutants, photolysis of water, and energy storage. In recent years, one-dimensional nano-TiO 2 (Nanowires, nanorods, nanotubes and nanofibers) have attracted more and more attention from scholars. Compared with spherical or two-dimensional nanofilms, the ordered arrangement of TiO 2 The nanorod array has obvious quantum confinement effect, highly ordered orientation structure and large specific surface area, which can effectively improve the interface separation of electrons and holes and the directional transport efficiency of carriers, so that it can be used in dye-sensitized cells, Photo(electro)catalytic degradation of pollutants, photoelectrochemical cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B7/10C30B7/14C30B29/62
CPCC30B7/10C30B7/14C30B29/16C30B29/62
Inventor 杜军龚程许永强戚雯倩李秀云李凯彭海龙罗美
Owner NANCHANG UNIV
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