Anatase phase titanium dioxide nanosheet array preparing method

A nanosheet array and titanium dioxide technology, which is applied in the field of nanotechnology material synthesis, can solve the problems of inability to obtain high photoelectric conversion efficiency, small specific surface area of ​​nanosheet films, and difficulty in preparing photovoltaic cell devices, and achieves the advantages of device preparation and orientation. Consistent, easy-to-use results

Active Publication Date: 2016-01-27
ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
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Problems solved by technology

Someone prepared a titanium oxide nanosheet array on a metal titanium sheet, and someone prepared a titanium dioxide nanosheet array film on a FTO conductive glass substrate, but the thin film prepared on a metal titanium sheet is not easy to prepare a photovoltaic cell device because the metal is opaque; The specific surface area of ​​the nanosheet film is small, and when the film is thin, it is dispersed and flake-like, which cannot obtain high photoelectric conversion efficiency; although the nanosheet array synthesized by someone has a large specific surface area, a single nanosheet is composed of small particles. , is not conducive to the transport of carriers; therefore, it is very important to prepare single-crystal nanosheet array films with large specific surface area, and it has not been reported

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  • Anatase phase titanium dioxide nanosheet array preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Titanium isopropoxide is dissolved in a mixed solvent composed of triethanolamine and water, the molar ratio of titanium isopropoxide, triethanolamine, and water is 1:48:2514, and the concentration of disodium edetate is 0.6mol / L. The concentration of trisodium citrate is 0.4mol / L, heated and stirred at 50°C for 15 minutes, and prepared as a reaction solution containing titanium precursor;

[0024] The tin-doped indium oxide glass was ultrasonically cleaned in acetone, isopropanol, absolute ethanol and deionized water for 15 minutes in sequence, and dried, and placed in a hydrothermal reaction kettle, and the titanium precursor reaction solution was added to the reaction kettle, 200 The reaction was heated at ℃ for 9 hours. After the reaction was completed, the conductive glass substrate was taken out from the reaction kettle, rinsed, and dried to obtain a sodium titanate nanosheet array film;

[0025] The titanate nanosheet array was cation-exchanged with 0.2mol / L dilu...

Embodiment 2

[0028] Dissolve tetra-n-butyl titanate in a mixed solvent composed of triethanolamine and water, the molar ratio of titanium isopropoxide, triethanolamine, and water is 1:16:838, and the concentration of disodium edetate is 0.1mol / L, the concentration of sodium oxalate is 0.2mol / L, heated and stirred at 60°C for 20min, and made into a reaction solution containing titanium precursor;

[0029] The fluorine-doped tin oxide glass was ultrasonically cleaned in acetone, isopropanol, absolute ethanol, and deionized water for 20 minutes in sequence, and dried, and placed in a hydrothermal reaction kettle, and the titanium precursor reaction solution was added to the reaction kettle, and the reaction solution was 210 ℃ for heating and reacting for 15 hours. After the reaction was completed, the conductive glass substrate was taken out from the reaction kettle, rinsed, and dried to obtain a sodium titanate nanosheet array film;

[0030] The titanate nanosheet array was cation-exchanged...

Embodiment 3

[0033] Dissolve tetra-n-butyl titanate in a mixed solvent composed of triethanolamine and water, the molar ratio of titanium isopropoxide, triethanolamine, and water is 1:4:111, and the concentration of disodium edetate is 0.9mol / L, the concentration of disodium phthalate is 0.5mol / L, heated and stirred at 70°C for 30min, and made into a reaction solution containing titanium precursor;

[0034] The tin-doped indium oxide glass was ultrasonically cleaned in acetone, isopropanol, absolute ethanol and deionized water for 30 minutes in sequence, and dried, and placed in a hydrothermal reaction kettle, and the titanium precursor reaction solution was added to the reaction kettle, 220 The reaction was heated at ℃ for 24 hours. After the reaction was completed, the conductive glass substrate was taken out from the reaction kettle, rinsed, and dried to obtain a sodium titanate nanosheet array film;

[0035] The titanate nanosheet array was cation-exchanged with 0.6mol / L dilute hydroc...

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Abstract

The present invention relates to an anatase phase titanium dioxide nanosheet array film preparing method on a transparent electric-conductive glass substrate. The main steps are as follows: evenly mixing a titanium precursor and an aqueous solution containing an organic amine complexing agent, then adding disodium ethylene diamine tetraacetate and other polycarboxylic sodium salt for preparing a reaction solution; placing the cleaned transparent electric-conductive glass substrate in a hydrothermal reaction vessel, and adding the titanium precursor reaction solution for reaction by heating, after full reaction, taking the transparent electric-conductive glass substrate out, washing, and drying by blowing to obtain a titanate nanosheet array film; using a dilute acid aqueous solution for cation exchange of the titanate nanosheet array film, after full exchange, washing, and drying by blowing; placing the cation exchanged titanate nanosheet array film into a muffle furnace for high temperature calcination, and after cooling, taking the transparent electric-conductive glass substrate out to obtain an anatase phase titanium dioxide nanosheet array film. The anatase phase titanium dioxide nanosheet array film preparing method is simple to operate, good in controllability, and suitable for use in photovoltaic devices, and the film can be firmly bonded to the substrate.

Description

technical field [0001] The invention relates to the field of synthesis of nanotechnology materials, in particular to a method for preparing an anatase phase titanium dioxide nanosheet array. Background technique [0002] The two-dimensional nanosheet array structure is an important type of nano-film structure. It has good light scattering and light absorption capabilities, excellent charge transport performance, and can expose a large number of advantageous crystal faces that are conducive to charge separation. Therefore, It has received extensive attention in the field of modern optoelectronic science. At present, the methods for preparing anatase titanium dioxide nanosheet arrays mainly include: chemical vapor deposition method, spray pyrolysis method, solution chemical method, electrochemical deposition method and so on. The solution chemical method is simple in operation, good in adjustable denaturation, low in cost and convenient to use. [0003] As a wide bandgap sem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00B82Y30/00
Inventor 李灿仲东张文华
Owner ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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