In-situ Raman light electrochemical cell by employing TiO2NTs/Ti sheet shape electrode and application thereof

A photoelectrochemical and in-situ Raman technology, applied in the field of photoelectrochemical cells, to achieve the effects of easy control of the thickness of the liquid layer, simple assembly, and convenient addition of liquid

Inactive Publication Date: 2015-09-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the existing Raman technology is difficult to combine with the photoelectrochemical technology, and to provi...

Method used

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  • In-situ Raman light electrochemical cell by employing TiO2NTs/Ti sheet shape electrode and application thereof
  • In-situ Raman light electrochemical cell by employing TiO2NTs/Ti sheet shape electrode and application thereof
  • In-situ Raman light electrochemical cell by employing TiO2NTs/Ti sheet shape electrode and application thereof

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Embodiment 1

[0029] Such as figure 1 As shown, a TiO 2 In situ Raman photoelectrochemical cells with NTs / Ti sheet electrodes, such as figure 1 As shown, it includes cell body 2, top cover 1, base 3, reference electrode adapter 4, counter electrode 5 and TiO 2 NTs / Ti working electrode 6 .

[0030] Such as Figure 2 to Figure 7 As shown, the cell body 2 and the base 3 are fixed by screws, the cell body 2 is used to place the solution, the top cover 1 and the cell body 2 are screwed and fixed, and the middle of the top cover 1 is a quartz window, which is convenient for laser transmission and also It can avoid the contact between the microscope lens of the Raman spectrometer and the solution in the electrolytic cell during the experiment. There is an exhaust hole on the edge of the top cover 1. The reference electrode adapter 4 and the cell body 2 are screwed and fixed for placing the reference electrode. , the reference electrode is Ag / AgCl electrode or saturated calomel electrode, TiO ...

Embodiment 2

[0034] use as figure 1 The device shown, with TiO 2 The NTs / Ti sheet electrode was used as the working electrode to study the photocatalytic process of p-nitrophenol.

[0035] (1) TiO 2 The preparation of NTs / Ti electrode: grind and clean the titanium plate, in the hydrochloric acid solution V(HCl):V(H 2 (0)=1:1 etch for 10min, until the solution turns purple, stop etching. later in NH 4 F was oxidized at a constant potential (30V) in ethylene glycol solution for 3h, and after cleaning, it was heated in a tube furnace at 500°C for 3h to obtain TiO 2 NTs / Ti electrodes.

[0036] (2) TiO modified by Ag NPs 2 Preparation of NTs / Ti electrode: 90 mg of silver nitrate was dissolved in 500 mL of deionized water, heated to boiling, and then 10 mL of 1% trisodium citrate aqueous solution was added dropwise with vigorous stirring. Continue to keep boiling for about 10 minutes after the dropwise addition, and cool to obtain an Ag sol with a particle size of about 60 nm. Centrifuge...

Embodiment 3

[0039] Adopt the Ag NPs / TiO prepared in embodiment 2 2 NTs / Ti electrode research on p-nitrophenol in Ag NPs / TiO 2 In situ photocatalytic degradation of NTs / Ti sheet electrode surface. Using Ag NPs / TiO 2 The NTs / Ti electrode was used as the working electrode, the Pt wire was used as the counter electrode, and the Ag / AgCl electrode was used as the reference electrode. Take 2mL of p-nitrophenol aqueous solution with a concentration of 1mMol and inject it into the electrolytic cell through the reference electrode transfer port, and connect the electrode clip in CHI660e to the corresponding electrode. Adjust the Raman spectrometer so that it is focused on the electrode surface. Control the effective illumination area to 1.13cm 2 , under the irradiation of ultraviolet light with a wavelength of 365nm and a power of 5W, when the bias voltage is +1.0V, the Raman spectra of the electrode surface at different times are taken to analyze the concentration of p-nitrophenol in Ag NPs / Ti...

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Abstract

The invention relates to an in-situ Raman light electrochemical cell by employing a TiO2NTs/Ti sheet shape electrode and an application thereof. The in-situ Raman light electrochemical cell comprises a cell body, a top cover, a pedestal, a reference electrode switch port, a counter electrode and a TiO2NTs/Ti work electrode; the in-situ Raman light electrochemical cell employs a three-electrode system, the TiO2NTs/Ti electrode is taken as the work electrode, Pt filament is the counter electrode, Ag/AgCl electrode can be taken as a reference electrode, illumination of 365 wavelength can be provided on the work electrode, certain bias voltage is applied for photoelectrocatalysis degradation, a Raman light spectra of an organic matter under different reaction time enables in-situ acquisition by employing a microscopic confocal Raman spectrometer, and a degrading mechanism of the organic matter on the TiO2NTs/Ti electrode can be obtained by analysis of the Raman light spectra. Compared with prior art, the assembling is simple, liquid addition is simple, liquid layer thickness is easily controlled, and good effect can be generated on the practical research and application aspect.

Description

technical field [0001] The invention relates to a photoelectrochemical cell, in particular to a 2 In situ Raman photoelectrochemical cell with NTs / Ti sheet electrode and its application. Background technique [0002] With the rapid development of industry and production, the increasingly serious environmental problems pose severe tests and strategic challenges to environmental testing and environmental treatment. Photoelectrocatalytic technology has been widely used because of its strong oxidation ability, high controllability, mild reaction conditions, easy preparation of materials, and no direct secondary pollution. [0003] At present, when using conventional methods to study the photocatalytic degradation mechanism of organic pollutants, due to the instability of some products and intermediates in the photocatalytic process, after the termination of the reaction or when the electrode is removed from the electrolytic cell, its Both structure and interfacial properties m...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N27/28
Inventor 曹同成张凯赵国华史慧杰
Owner TONGJI UNIV
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