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Preparation method of titanium dioxide nanotube array photoelectrochemical oxygen evolution electrode co-modified with polyacid and nine cobalt octasulfide

A nanotube array and titanium dioxide technology, applied in the field of photoelectrochemistry, can solve problems such as affecting electron transport and weakening photoelectrochemical water splitting ability

Inactive Publication Date: 2019-05-10
NORTHEAST NORMAL UNIVERSITY
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Problems solved by technology

However, when titanium dioxide is exposed to light, after the photogenerated electrons jump to the conduction band, the electrons and holes are easy to recombine, which affects the transport of electrons, resulting in the weakening of the photoelectrochemical water splitting ability.

Method used

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  • Preparation method of titanium dioxide nanotube array photoelectrochemical oxygen evolution electrode co-modified with polyacid and nine cobalt octasulfide
  • Preparation method of titanium dioxide nanotube array photoelectrochemical oxygen evolution electrode co-modified with polyacid and nine cobalt octasulfide
  • Preparation method of titanium dioxide nanotube array photoelectrochemical oxygen evolution electrode co-modified with polyacid and nine cobalt octasulfide

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specific Embodiment 1

[0028] The experiment was carried out in a quartz beaker using a three-electrode system. The titanium dioxide photoanode and the titanium dioxide-cobalt octasulfide-polyacid composite film photoanode were used as working electrodes respectively, and the effective area was 1×1cm 2 , the platinum wire was used as the counter electrode, and the Ag / AgCl electrode was used as the reference electrode. The supporting electrolyte is 0.5M sodium sulfate solution. A 300W xenon lamp is used as the light source, and the radiation intensity is 100mW·cm -2 . The voltage range is 0.2-1.6V (compared to the standard hydrogen electrode). As can be clearly seen from the figure, after introducing nine cobalt eight sulfides and polyacids, the composite film photoanode photocurrent has a significant promotion (see attached Figure 5 ).

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Abstract

The invention provides a preparation method of a polyacid and enneacobalt octasulfide co-modified titanium dioxide nanotube array photoelectrochemical oxygen evolution electrode. The prepared polyacid and enneacobalt octasulfide co-modified titanium dioxide nanotube array composite film photo anode can be used for photoelectrochemical water decomposition and oxygen evolution. The composite film photo anode is the titanium dioxide-enneacobalt octasulfide-polyacid composite film photo anode which is formed by using a titanium dioxide nanotube array as a main body and co-modified by enneacobalt octasulfide and Keggin type phosphotungstic acid. Under indoor temperature environment and irradiation of a xenon lamp, the composite film photo anode has good photoelectrochemical water decomposition performance. The preparation method of the titanium dioxide-enneacobalt octasulfide-polyacid composite film electrode is simple, quite low in cost, capable of achieving efficient and stable photoelectric water decomposition without sacrificing a reagent, a protective layer and a buffer solution, capable of achieving high-efficiency conversion from optical energy to chemical energy and applicable to development and production of the novel photoelectrochemical water decomposition and oxygen evolution electrode.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemistry, and relates to a preparation method of a titanium dioxide nanotube array photoelectrochemically decomposing water and oxygen evolution electrode promoted synergistically by polyacid and nonacobalt octasulfide. Background technique [0002] The production of hydrogen and oxygen by splitting water can be used as energy for human use, and the use of solar energy and electricity to obtain these energy sources is an ideal and environmentally friendly solution. From the perspective of thermodynamics and kinetics, there are great obstacles in the direct photolysis of water, which makes this process difficult to realize in practice, and has become the focus of many researchers. The introduction of electrochemical catalysts or photochemical catalysts will greatly reduce the kinetic hindrance of photo-splitting water. Titanium dioxide (TiO 2 ) is an important semiconductor photocatalytic ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04C25D11/26
CPCC25B1/04C25D11/26C25B1/55C25B11/091Y02E60/36Y02P20/133
Inventor 许林刘然
Owner NORTHEAST NORMAL UNIVERSITY
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