Continuous photocatalysis method based on secondary-assembled graphene/P25 composite film

A composite film, two-level assembly technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of inability to meet large-scale industrial-scale treatment of waste liquid, and improve the photocatalytic degradation performance. , The effect of inhibiting agglomeration and facilitating operation and maintenance

Inactive Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a continuous photocatalytic method based on two-level assembled graphene/P25 composite film in order

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  • Continuous photocatalysis method based on secondary-assembled graphene/P25 composite film
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  • Continuous photocatalysis method based on secondary-assembled graphene/P25 composite film

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specific Embodiment approach 1

[0020] Specific embodiment one: a kind of continuous photocatalytic method based on secondary assembled graphene / P25 composite film of the present embodiment is specifically carried out according to the following steps:

[0021] 1. Assemble the graphene / P25 multilayer film on the quartz sheet by layer-by-layer technology: disperse P25 in a hydrochloric acid solution with a pH of 2, and ultrasonically treat it for 20-60 minutes to obtain a positively charged P25 dispersion; it will be passed through Hummer's The graphene oxide prepared by the method was configured into a 2mg / mL solution by an ultrasonic-assisted method; the clean quartz substrate was immersed in the polyethyleneimine solution for 30min to 60min to obtain a positively charged quartz substrate; The positively charged quartz substrate is immersed in the graphene oxide solution and the P25 dispersion in turn, rinsed with deionized water and dried with nitrogen after each immersion, to obtain a quartz sheet loaded wi...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of P25 titanium dioxide described in step 1 to the hydrochloric acid solution with a pH of 2 is 1mg:2mL. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the above steps described in Step 1 are repeated to obtain a quartz plate loaded with a composite thin film with 5 layers. Other steps and parameters are the same as those in Embodiment 1 or 3.

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Abstract

The invention relates to a continuous photocatalysis method based on a secondary-assembled graphene/P25 composite film. The invention relates to a continuous photocatalysis method based on the secondary-assembled graphene/P25 composite film, which aims at solving the problem that the existing intermittent processing method cannot satisfy the industrialized mass treatment of waste liquid. The method comprises the following steps: I, assembling a graphene/P25 multilayer film on a quartz sheet by virtue of a layer by layer (LbL) technology (primary assembling; III, loading a quartz assembly array of the graphene/P25 multilayer film (secondary assembly); and III, performing a continuous photocatalysis degradation process. The brand new graphene/P25 layer-by-layer composite film array is prepared by utilizing the secondary assembly technology, the fluid is circulated by utilizing a pump, so that the continuous photocatalytic degradation of organic dye can be effectively realized, and the mass treatment of sewage is realized. The catalyst is loaded on the quartz sheet, so that the technological operation is greatly simplified, not only is the recycling problem of the catalyst solved, but also the photocatlaysis efficiency is improved, and the method is suitable for the mass treatment of sewage.

Description

technical field [0001] The present invention relates to a graphene / P25 (commercial TiO2) based on secondary assembly 2 ) continuous photocatalytic method for composite thin films. Background technique [0002] In recent years, with the continuous development of industry, the effective use of renewable energy, clean water resources and environmental protection has become increasingly important, and has become an important issue that human beings need to solve urgently. For example: the rapid development of printing, dyeing and textile industries has caused more and more serious water pollution. Therefore, how to eliminate pollution and reduce energy consumption through effective means is a major challenge for current scientific research. Among the many wastewater treatment technologies, the photocatalytic degradation technology using solar energy is an effective means to simultaneously solve the two major problems of energy shortage and environmental pollution faced by the ...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/72B01J21/18
Inventor 王铀张迪
Owner HARBIN INST OF TECH
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