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Ag-TiO2/Ti(NO2)/ITO photoelectrode, photoelectric synergistic catalytic reaction apparatus and application of photoelectric synergistic catalytic reaction apparatus

A technology of reaction device and synergistic catalysis, applied in application, chemical instruments and methods, food preservation, etc., to achieve the effect of improving photocatalytic performance

Inactive Publication Date: 2018-08-03
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies of the above-mentioned prior art, the primary purpose of the present invention is to provide a Ag-TiO 2 / Ti(NO 2 ) / ITO photoelectrode, where Ti(NO 2 ) means N 2 Plasma Treatment of Ag-TiO at Atmospheric Pressure 2 After the surface, the new phase formed by in-situ doping N can further improve the Ag-TiO 2 The photocatalytic performance of the catalyst, which overcomes the existing TiO 2 Insufficiency of a single photocatalytic fresh-keeping technology

Method used

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  • Ag-TiO2/Ti(NO2)/ITO photoelectrode, photoelectric synergistic catalytic reaction apparatus and application of photoelectric synergistic catalytic reaction apparatus
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  • Ag-TiO2/Ti(NO2)/ITO photoelectrode, photoelectric synergistic catalytic reaction apparatus and application of photoelectric synergistic catalytic reaction apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Ag-TiO 2 / Preparation of ITO precursor film material

[0060] (1) Butyl titanate (Ti(OBu) 4 , C.P.) and ethanol (C 2 h 5 OH, A.R.) were mixed at a volume ratio of 1:5, and ultrasonically oscillated for 5 minutes with an ultrasonic cleaner.

[0061] (2) Add silver nitrate solution to the solution in step (1) so that the mass fraction of silver ions in the mixed solution is 0.05%.

[0062] (3) Add glacial acetic acid solution dropwise to adjust the pH value to about 3-4, and then continue ultrasonic oscillation for 5 minutes.

[0063] (4) Stir with a magnetic stirrer (heating at a constant temperature of 60°C) for 30 minutes, and seal and age at room temperature for more than 24 hours to obtain a stable, uniform, clear and translucent yellow-orange sol.

[0064] (5) Using clean ITO glass as the substrate, silver-doped TiO was prepared from the sol precursor by dipping and pulling method 2 The film is pulled at a relatively constant speed (2mm / s), and the ...

Embodiment 2

[0072] Example 2: Ag-TiO 2 / Ti(NO 2 ) / ITO material preparation

[0073] The plasma surface treatment instrument used in the low-temperature plasma test is the GM-2000 low-temperature plasma surface treatment instrument of Shenzhen Fangrui Technology Co., Ltd. The air source pressure of the plasma surface treatment instrument is 0.2~0.25MPa, the current is about 3~4A during normal operation, the treatment width is 7~13mm, and the operating temperature range is -10℃~50℃.

[0074] Ag-TiO 2 / Schematic diagram of ITO surface treatment process by low temperature plasma figure 2 As shown, the specific test steps are:

[0075] (1) Firstly, place the low-temperature plasma processor in a suitable position so that it is convenient to hold the nozzle with both hands, and prevent the high-voltage cables and gas pipes on the nozzle from being pulled and rubbed by force, and connect the ground wire.

[0076] (2) Different batches of Ag-TiO that will need to be processed 2 / ITO is fix...

Embodiment 3

[0084] Example 3: Ag-TiO 2 / Ti(NO 2 ) / ITO photoelectrode preparation

[0085] Nitrogen-containing lithium phosphate (LIPON) electrolyte film (purchased by Guangzhou Institute of Materials and Energy) was placed on two pieces of Ag-TiO prepared in Example 2. 2 / Ti(NO 2 ) / ITO material (plasma surface treatment time is 1min), fixed with conductive adhesive, that is, Ag-doped TiO with positive and negative electrodes 2 Thin film / ITO system.

[0086] The ionic conductivity of nitrogen-containing lithium phosphate (LIPON) electrolyte film is 6.0*10 -7 s / cm, electronic conductivity below 10 -10 s / cm. Three-dimensional conductive adhesive tape, thickness 62um, contact resistance less than 1.2Ω.

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Abstract

The invention belongs to the field of fruit fresh keeping and storage, and discloses Ag-TiO2 / Ti(NO2) / ITO photoelectrode, a photoelectric synergistic catalytic reaction apparatus based on the Ag-TiO2 / Ti(NO2) / ITO photoelectrode and application of the photoelectric synergistic catalytic reaction apparatus. A Ag-TiO2 / Ti(NO2) / ITO system is used as a photoelectrode, a TiO2 film is doped and modified byvirtue of Ag, then the plasma treatment is performed at the atmosphere pressure of N2, N is in site doped to form a novel phase, a semiconductor photocatalytic oxidation method and an electrochemicalmethod are combined to produce a synergistic effect, so that the quantum efficiency of the catalytic process can be significantly increased, when the photoelectrode synergistic catalytic reaction apparatus is applied to the fresh keeping of fruits, the effect is apparently improved compared with the single photocatalytic effect and the single electric catalytic effect, and a monopolar dynamics reaction rate constant of the C2H4 photoelectric synergistic catalytic degradation is increased from the 6.86*10<-4>(min<-1>) with no voltage to 9.06*10<-4>(min<-1>) and is increased by 32 percent.

Description

technical field [0001] The invention belongs to the field of fresh-keeping and storage of fruits, in particular to an Ag-TiO 2 / Ti(NO 2 ) / ITO photoelectrode, photoelectric synergistic catalytic reaction device and its application. Background technique [0002] Domestic fruit preservation and storage technology has been well developed in the past 20 years. Combined with my country's national conditions, a number of fruit preservation technologies have been developed and applied, and a relatively mature fruit preservation technology system has been formed. At present, the most effective means to ensure the quality and safety of fruits during the supply period after harvest is the fruit cold chain. At present, my country has initially established a fruit and vegetable preservation system based on storage, cold storage and controlled atmosphere storage. Mechanical refrigeration is still the most widely used fruit storage method in my country, and the number of fruits stored i...

Claims

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Application Information

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IPC IPC(8): B01D53/32B01D53/86B01D53/72A23B7/152
Inventor 杨洲卢明剑赵文锋李焱黎波徐岩宋帅帅
Owner SOUTH CHINA AGRI UNIV
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