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Method for performing photoelectrolysis of water and preparing hydrogen by using palladium quantum dot modified titanium dioxide nanotube array

A nanotube array and titanium dioxide technology, applied in electrolytic components, electrolytic processes, electrodes, etc., can solve the problems of inhibiting photocatalytic performance and photoelectric conversion efficiency, and achieve good chemical stability, low cost, and fast hydrogen production rate.

Inactive Publication Date: 2011-10-26
XIAMEN UNIV
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Problems solved by technology

However, pure TiO 2 The electron / hole pairs generated by photoexcitation in nanotubes are prone to recombination, which largely inhibits the improvement of their photocatalytic performance and photoelectric conversion efficiency. [4]

Method used

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  • Method for performing photoelectrolysis of water and preparing hydrogen by using palladium quantum dot modified titanium dioxide nanotube array
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  • Method for performing photoelectrolysis of water and preparing hydrogen by using palladium quantum dot modified titanium dioxide nanotube array

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Embodiment Construction

[0037] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0038] The present invention comprises the following steps:

[0039] 1) Pretreatment of the titanium plate: the titanium plate with a size of 1cm×2cm was polished with 400, 800, 1000, 1200, 1500# sandpaper in sequence, and then ultrasonically cleaned with acetone, ethanol and triple distilled water in sequence.

[0040] 2) Preparation of TiO by 3 times anodic oxidation 2 Nanotube array: the polished and cleaned titanium plate was mixed with NH 4 F and H 2 In the ethylene glycol solution of O, a voltage is applied for the first oxidation to obtain TiO 2 Nanotube array, the TiO on the surface was removed after the sample was taken out 2 Nanotube layer, the titanium substrate is oxidized for the second time, and the TiO on the surface is removed again 2 Nanotube layer, and then perform the third oxidation to obtain TiO 2 nanotube array; the NH-cont...

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Abstract

The method discloses a method for performing photoelectrolysis of water and preparing hydrogen by using a palladium quantum dot modified titanium dioxide nanotube array, relating to a method for preparing hydrogen. The method utilizes a new titanium dioxide photocathode material to perform the photoelectrocatalysis and electrolysis of water and prepare hydrogen. The method comprises the following steps: the palladium quantum dot modified titanium dioxide nanotube array is used as photocathode, the photoelectrolysis of water is performed in a three-electrode system to prepare hydrogen; the hydrothermal method is adopted to deposit palladium quantum dots on the surface of the TiO2 nanotube array, the particle size is 2.5-4nm, the particles are uniformly distributed on the outer surface of the nanotubes, the two materials are separately used as photoanode and photocathode; and in a three-electrode electrolytic cell, sodium carbonate solution is used as a system and a certain bias is applied to perform the photoelectrolysis of water and prepare hydrogen. Compared with the traditional platinum photocathode, the photocurrent and optical conversion efficiency of the palladium modified titanium dioxide nanotube array photocathode are obviously increased, the hydrogen-producing speed is high, the nanotube array photocathode has good chemical stability and low-cost and large-scale industrial applications of the photocathode can be realized.

Description

technical field [0001] The invention relates to a hydrogen production method, in particular to a palladium quantum dot modified titanium dioxide nanotube array photoelectrolysis method for hydrogen production. Background technique [0002] Nano titanium dioxide (TiO 2 ), as a green functional material, has excellent photocatalytic and photoelectric conversion properties, and is widely used in photocatalytic and photoelectric water splitting hydrogen production and other fields [1，2] . Highly ordered TiO prepared on titanium substrates by electrochemical anodization 2 Nanotube arrays, due to the large specific surface area of ​​the tubes and the excellent transport performance of photogenerated carriers, have shown great application prospects in the field of hydrogen production by photoelectrolysis of water. [3] . However, pure TiO 2 The electron / hole pairs generated by photoexcitation in nanotubes are prone to recombination, which largely inhibits the improvement of the...

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Application Information

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IPC IPC(8): C25B1/04C25B11/08
CPCY02E60/36
Inventor 林昌健宫娇娇
Owner XIAMEN UNIV
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