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Preparation method of amorphous nano-porous titanium dioxide-supported graphene photocatalytic thin film

A photocatalytic film and nanoporous technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult TiO2 and carbon material compounding, complex process requirements, etc., and achieve low implementation costs , Overcoming the effects of difficult separation and recovery and low reaction temperature

Active Publication Date: 2015-08-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with chemical preparation methods, these film-making technologies have more complex process requirements, especially it is difficult to realize TiO 2 Composite with carbon materials

Method used

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  • Preparation method of amorphous nano-porous titanium dioxide-supported graphene photocatalytic thin film
  • Preparation method of amorphous nano-porous titanium dioxide-supported graphene photocatalytic thin film
  • Preparation method of amorphous nano-porous titanium dioxide-supported graphene photocatalytic thin film

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Embodiment 1

[0027]Preparation of Nanoporous TiO on the Surface of Amorphous Ti-Ag Alloy Strips by Constant Voltage Dealloying 2 The constant voltage dealloying method mentioned by the thin film electrode uses the Gamry Reference600 electrochemical workstation, adopts the traditional electrochemical three-electrode system, in which the Pt sheet electrode (2cm×2cm×5mm) is used as the counter electrode, and the saturated calomel electrode (SCE) is used as the counter electrode. As a reference electrode, a Ti-Ag amorphous alloy strip coated with silica gel is used as a working electrode, which is prepared by electrochemical dealloying reaction in nitric acid solution. The process parameters used in the constant voltage dealloying corrosion process are: Ti-Ag amorphous alloy composition (alloy element composition is calculated as atomic percentage): Ti: 30%; Ag: 70%; electrolyte concentration: mass fraction is 30% % nitric acid aqueous solution; electrolyte; temperature: 70°C; constant voltage...

Embodiment approach 2

[0030] Preparation of Nanoporous TiO on the Surface of Amorphous Ti-Ag Alloy Strips by Constant Voltage Dealloying 2 The constant voltage dealloying method mentioned by the thin film electrode uses the Gamry Reference600 electrochemical workstation, adopts the traditional electrochemical three-electrode system, in which the Pt mesh electrode (2cm×2cm) is used as the counter electrode, and the saturated calomel electrode (SCE) is used as the reference The electrode is made of Ti-Ag amorphous alloy strip coated with silica gel as a working electrode, which is prepared by electrochemical dealloying reaction in nitric acid solution. The process parameters used in the constant voltage dealloying corrosion process are: Ti-Ag amorphous alloy composition (alloy element composition is calculated as atomic percentage): Ti: 40%; Ag: 60%; electrolyte concentration: mass fraction is 30% % nitric acid aqueous solution; electrolyte; temperature: 50°C; constant voltage potential: 1.5V; reacti...

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Abstract

The invention discloses a preparation method of an amorphous nano-porous titanium dioxide-supported graphene photocatalytic thin film and aims to provide a novel graphene-TiO2 composite electrode catalyst. According to the preparation method, firstly an electrochemical three-electrode system is employed in experiment with a nitric acid solution as an electrolyte solution, and an electrochemical workstation is used for respectively applying a constant-voltage to an amorphous alloy stripe to perform constant-voltage electrochemical corrosion, thereby forming a nano-porous thin film structure being uniform in pore distribution; and then graphite is fully oxidized through a strong oxidizing agent to prepare a graphene oxide solution; and then through a Czochralski method, an graphene oxide coating layer in a certain thickness is formed on the surface of the amorphous nano-porous titanium dioxide stripe; and finally the graphene thin film is prepared through an oxidation / reduction reaction. In the invention, preparation of the graphene thin film on the surface of the amorphous nano-porous titanium dioxide stripe is disclosed through dealloying, oxidation / reduction reaction with combination of the Czochralski method. The preparation method is low in cost, is strong in controllability, is low in reaction temperature and is a high-effective and economical synthetic method.

Description

technical field [0001] The present invention relates to a preparation method of a novel nanoporous film electrode, more specifically, to a preparation method of a nanoporous titania-supported graphene photocatalytic film electrode with high catalytic activity applied in the field of electrocatalysis. Background technique [0002] Since the discovery in 1972 that semiconductor titanium dioxide can decompose water into hydrogen and oxygen under ultraviolet light, research on photocatalysis and photoelectrochemistry of titanium dioxide has been very active, and has been widely used in the development of photoelectric conversion solar cells, gas sensors, and solar water splitting systems. Photocatalytic degradation of hydrogen, sewage and waste gas, photocatalytic sterilization, self-cleaning and anti-fog, etc. Titanium dioxide has low cost, no secondary pollution, stable performance, and can drive photocatalytic reactions by using sunlight. However, TiO 2 Its forbidden band w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/10
Inventor 王鹤峰袁国政靳晓敏李飞刘二强于菲菲
Owner TAIYUAN UNIV OF TECH