Cadmium sulfide (CdS) quantum dot sensitized branching titanium dioxide (TiO2) nanorod array electrode and preparation method and usage thereof

A nanorod array and quantum dot sensitization technology, applied in the field of photoelectrochemistry, can solve the problems of insufficient stability of CdS, unusable nanorod array materials, small contact area, etc., so as to alleviate the shortage of fossil fuels, improve the efficiency of photolysis, good repeatability

Inactive Publication Date: 2013-06-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention will solve is traditional TiO 2 Nanorod array material with small contact area and branched TiO 2 Nanorod array materials cannot use visible light, and CdS is not stable enough, which limits the ability of CdS to sensitize TiO 2 Technical problems in the application of nanorods in the field of photoelectric catalysis, providing a cadmium sulfide quantum dot sensitized branched titanium dioxide nanorod array electrode and its preparation method and use

Method used

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  • Cadmium sulfide (CdS) quantum dot sensitized branching titanium dioxide (TiO2) nanorod array electrode and preparation method and usage thereof
  • Cadmium sulfide (CdS) quantum dot sensitized branching titanium dioxide (TiO2) nanorod array electrode and preparation method and usage thereof
  • Cadmium sulfide (CdS) quantum dot sensitized branching titanium dioxide (TiO2) nanorod array electrode and preparation method and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) TiO 2 Fabrication of Nanorod Arrays

[0046] ① Sonicate the FTO conductive glass in deionized water, acetone and ethanol solution for 10 minutes successively, wash it with deionized water, and dry it for later use;

[0047] ② Prepare the precursor solution of titanium source: first mix 30ml of concentrated hydrochloric acid (37.5% mass concentration) with 30ml of deionized water, stir for 5 minutes, add 1ml of butyl titanate and continue stirring for 5 minutes to obtain the titanium source precursor solution ;

[0048] ③ Place the conductive surface of the FTO conductive glass obliquely downward in the crystallization kettle, add the titanium source precursor solution, and hydrothermally synthesize it at 150°C for 14 hours to prepare TiO 2 Nanorod arrays were washed with deionized water and dried at 80°C.

[0049] (2) Branched TiO 2 Fabrication of Nanorod Arrays

[0050] ① Prepare 0.2M TiCl 4 Aqueous solution: the preparation process is to take a certain amoun...

Embodiment 2

[0066] (1) TiO 2 The preparation of the nanorod array is the same as in Example 1.

[0067] (2) Branched TiO 2 The preparation of the nanorod array is the same as in Example 1.

[0068] (3) CdS quantum dots sensitized branched TiO 2 Fabrication of Nanorod Arrays

[0069] ① Prepare 0.1M Cd(NO 3 ) 2 Aqueous solution, 0.1M Na 2 S aqueous solution;

[0070] ② branched TiO 2 CdS quantum dots sensitized branched TiO prepared by continuous chemical water bath deposition with nanorod arrays as substrates through multiple sensitization cycles 2 Nanorod Arrays:

[0071] A single sensitization cycle is to first convert the branched TiO 2 Nanorod arrays soaked in Cd(NO 3 ) 2 in aqueous solution, rinsed after 5 minutes, and then put in Na 2 S aqueous solution, rinse after 5 minutes;

[0072] Repeat the sensitization cycle operation 7 times to obtain CdS quantum dot sensitized branched TiO 2 Nanorod array electrodes.

[0073] The experimental results show that the diameter o...

Embodiment 3

[0076] (1) TiO 2 The preparation of the nanorod array is the same as in Example 1.

[0077] (2) Branched TiO 2 Fabrication of Nanorod Arrays

[0078] ① Prepare 0.1M TiCl 4 Aqueous solution: the preparation process is to take a certain amount of TiCl under stirring conditions 4 soluble in ice water;

[0079] ②The prepared TiO 2 Nanorod arrays placed in 0.2M TiCl 4 In aqueous solution, amorphous branched TiO was prepared by chemical water bath deposition under sealed conditions for 24 hours 2 nanorod arrays;

[0080] ③Under the condition of 450℃, the above-prepared amorphous branched TiO 2 The nanorod arrays were fired for 30 min under air atmosphere to form branched TiO 2 nanorod arrays.

[0081] (3) CdS quantum dots sensitized branched TiO 2 Fabrication of Nanorod Arrays

[0082] ① Prepare 0.01M CdCl 2 Aqueous solution, 0.01M Na 2 S aqueous solution;

[0083] ② branched TiO 2 CdS quantum dots sensitized branched TiO prepared by continuous chemical water bath de...

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Abstract

The invention discloses a cadmium sulfide (CdS) quantum dot sensitized branching titanium dioxide (TiO2) nanorod array electrode and a preparation method and the usage of the electrode; a TiO2 nanorod used for forming a TiO2 nanorod array comprises a main nanorod; a branching structure is densely distributed on the surface of the main nanorod; CdS quantum dots are evenly loaded on the surface of the branching structure; and the preparation method comprises three steps including preparation of the TiO2 nanorod array, preparation of a branching TiO2 nanorod array and preparation of a CdS quantum dot sensitized branching TiO2 nanorod array. The invention effectively inhibits the compounding of electron-hole pairs, improves the water photolysis efficiency of material, expands the light absorption range of the material into the visible region, improves the water photolysis hydrogen production activity of a photo-electrochemical cell, and improves the light corrosion performance of the CdS quantum dots, thus greatly improving the stability of the material. The invention is simple in operation process, high in controllability, stable in photoelectric catalysis performance and good in repeatability.

Description

technical field [0001] The invention relates to the field of photoelectrochemical technology, in particular to a nanorod array electrode and a preparation method thereof. Background technique [0002] Hydrogen energy has attracted widespread attention due to its high-energy and clean advantages in today's increasingly depleted fossil energy sources; solar energy occupies a pivotal position in energy planning due to its inexhaustible, clean and pollution-free advantages. As a new method of hydrogen production, solar photoelectrochemical cell splitting water to produce hydrogen truly realizes no pollution to the environment and rational utilization of energy. Titanium dioxide (TiO 2 ) has a large reserve in nature, good corrosion resistance, low price and non-toxicity, and has attracted much attention. However, TiO 2 Under light conditions, the photogenerated electron-hole recombination is extremely fast, and the photocatalytic activity is low; at the same time, TiO 2 The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
Inventor 巩金龙苏凤莉吕睿卢健伟王拓马新宾
Owner TIANJIN UNIV
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