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A titanium dioxide nanotube modified electrode with psii assembled on its surface and its preparation method and application

A technology of titanium dioxide and modified electrodes, which is applied in the fields of nanotechnology, chemical instruments and methods, and nanotechnology for materials and surface science, can solve limited problems, and achieve the effects of wide sources, reduced pollution, and low prices

Active Publication Date: 2017-06-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on the combination of PSII and titanium dioxide for photolysis of water and photocurrent generation is very limited.

Method used

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  • A titanium dioxide nanotube modified electrode with psii assembled on its surface and its preparation method and application
  • A titanium dioxide nanotube modified electrode with psii assembled on its surface and its preparation method and application
  • A titanium dioxide nanotube modified electrode with psii assembled on its surface and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1. Preparation of PSII / five-layer titanium dioxide nanotube modified electrode and its electrochemical test

[0044] (1) Follow the steps below to extract PSII from spinach:

[0045] Prepare the following solutions separately: BBY-1: Containing 40mM NaCl, 0.2wt% BSA, 2mM MgCl 2 , 20mM Tricine-NaOH solution of 2mM vitamin C and 400mM sucrose (pH=7.8); BBY-2: contains 10mMNaCl, 0.2% BSA and 5mM MgCl 2 20mM Tricine-NaOH solution (pH=7.8); BBY-3: contains 15mM NaCl, 5mM MgCl 2 20mM MES-NaOH solution (pH=6.5) with 400mM sucrose; BBY-3T: Prepare 20% (w / v) Tritox-100 with BBY-3; BBY-4: Contain 15mM NaCl, 5mM MgCl 2 , 400mM sucrose and 500mM betaine in 20mM MES solution (pH=6.5).

[0046] The following steps are carried out at 4°C and green protective light. All instruments, glassware and centrifuge tubes need to be pre-cooled, and the extraction process is completed within 5 hours.

[0047] After washing the spinach, place it in the refrigerator at 4℃ and avoid light for more ...

Embodiment 2

[0075] Example 2. The effect of the number of titanium dioxide nanotube layers on the photocurrent response value

[0076] In order to compare the effect of the number of carbon dioxide nanotube layers on the photocurrent response, PSII / five-layer titania nanotube modified electrode, PSII / ten-layer titania nanotube modified electrode and PSII / twenty-layer titania nanotube modified electrode were prepared and tested. Current response.

[0077] (1) Preparation and electrochemical test of PSII / ten-layer titanium dioxide nanotube modified electrode

[0078] The steps and parameters for preparing ten-layer titanium dioxide nanotubes are basically the same as those of five-layer titanium dioxide nanotubes in Example 1. The difference is that: when preparing nanotube titanium dioxide materials for electrode surface modification, the method of depositing and hydrolyzing titanium dioxide nano-films on the surface of filter paper fibers The number of cycles is increased to 10, and filter pape...

Embodiment 3

[0085] Example 3. The influence of PSII modification amount on the photocurrent response value

[0086] The steps and parameters of this example are basically the same as those in example 1, the difference is: when PSII is assembled on the electrode surface modified with nanotube titanium dioxide, the diluted PSII solution with a chlorophyll content of 1 mg / mL is transferred with a pipette respectively 10 μL, 20 μL, and 30 μL were applied to the surface of the ITO electrode modified with five-layer nano-tube titanium dioxide to obtain modified electrodes with different PSII modification amounts. The electrochemical test results show that when the modification amount is 10μL, 20μL and 30μL, the photocurrent response produced is not much different. This is because the effective transmission of electrons mainly occurs between the PSII and the electrode in contact with the modified electrode surface.

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Abstract

The invention discloses a titanium dioxide nanotube modified electrode with a PSII (photosystem II) assembled surface, a preparation method and application thereof. The preparation method comprises the steps of: 1) transferring a suspension liquid of titanium dioxide nanotubes dispersed in an organic solvent to the surface of a bare electrode, and conducting drying and film forming so as to obtain a titanium dioxide nanotube modified electrode; 2) transferring a PSII solution dissolved in a buffer solution to the film surface, and performing drying to obtain the titanium dioxide nanotube modified electrode with a PSII assembled surface. In the invention, natural cellulose is selected as the template, and the synthesized material has a large specific surface area and a multistage network structure, thus being beneficial to adsorption of PSII on the electrode surface modified by the material. The PSII is directly assembled on the nano-tubular titanium dioxide modified electrode surface, thus being more beneficial to the direct action of PSII and titanium dioxide. Dye sensitization of titanium dioxide is unnecessary, and the dye pollution to the environment is reduced. With very superior photocurrent response under the excitation of red light and white light, the electrode is stable.

Description

Technical field [0001] The invention relates to a PSII modified electrode and a preparation method and application thereof, in particular to a titanium dioxide nanotube modified electrode with PSII assembled on the surface, and a preparation method and application thereof. Background technique [0002] In nature, photosynthesis is the basis for the survival of the biological world and an important bridge for the earth's carbon and oxygen cycle. The photosynthesis in plants is mainly a biochemical process that uses photosynthetic pigments to convert carbon dioxide and water into organic matter and release oxygen through light and dark reactions under the irradiation of visible light. Among them, Photosystem II (PSII) is a multi-subunit photosynthetic pigment protein complex that exists in the thylakoid membrane. As an important membrane protein in the photosynthesis chain, it can efficiently extract and transfer electrons in water and generate oxygen. , And generate a proton grad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M14/00G01N27/327B82Y30/00B82Y40/00B01J19/12C01B3/04
CPCB01J19/127B01J2219/00745B01J2219/00943B01J2219/0815B01J2219/0837B01J2219/0877B82Y30/00B82Y40/00C01B3/042C01B2203/0266G01N27/3275G01N27/3278G01N33/5438H01M4/8825H01M14/005Y02E60/36Y02E60/50Y02P20/133
Inventor 李峻柏李姣冯熙云蔡鹏
Owner INST OF CHEM CHINESE ACAD OF SCI