Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Self-biased dual-light electrode system and application thereof

A self-bias, photo-anode technology, applied in the direction of illumination water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of increased energy consumption, low utilization rate, low cathode electron selectivity, etc. , to achieve the effect of good porosity and large specific surface area

Active Publication Date: 2019-01-08
ZHEJIANG GONGSHANG UNIVERSITY
View PDF16 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Applied bias increases energy consumption and requires additional energy supply equipment;
[0006] (2) The cathode passively accepts and transfers the anode photogenerated electrons, the cathode electron selectivity is low, the utilization rate for reducing Cr(VI) is low, and the dissolved O in water 2 , easily reduced COD, H+, etc. compete with Cr(VI) for cathode electrons

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Self-biased dual-light electrode system and application thereof
  • Self-biased dual-light electrode system and application thereof
  • Self-biased dual-light electrode system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] A method for preparing a self-biased double photoelectrode system photocatalytic electrode, comprising the steps of:

[0064] (1) 2.68g Zn(NO 3 ) 2 .6H 2 O powder and 0.68g glycolic acid powder were dissolved in 15mL ethanol solution, stirred for 20min, and 20mL of the above solution was selected and inserted into the FTO electrode and heated at 160°C for 16h to obtain the N-Zn-MOF photocathode; the selected FTO conductive glass had a specification of 2 ×5cm, thickness 2.2mm, resistance 7 ohms, light transmittance 80%.

[0065] (2) Dissolve 0.004mol ferric nitrate powder in 40mL DMF (nitrogen dimethylformamide) and stir for 20min to obtain solution A;

[0066] (3) Dissolve 0.04mol 2-methylimidazole powder in 40mL DMF (nitrogen dimethylformamide) and stir for 20min to obtain solution B;

[0067] (4) Add solution B dropwise to solution A at a rate of 2-3 s / mL, mix evenly, stir for 20 minutes, insert FTO electrode into 150°C water heating for 15 hours to obtain Fe-MOF ...

Embodiment 1

[0070] The Fe-MOF photocatalytic anode containing three different preparation ratios was selected, and the photoelectric catalytic anode with strong photoresponsiveness was determined by comparing its photocurrent performance. The electrode preparation ratio is as follows:

[0071] Table 1 Preparation of Fe-MOF electrodes with different concentrations of ferric nitrate and 2-methylimidazole (40mL DMF is used to prepare solution A and solution B respectively, and the DMF volume in Table 2 is the sum of the DMF volumes of solution A and solution B)

[0072]

[0073] Depend on Figure 7 , it can be found that under visible light conditions, with Pt as the counter electrode and Ag / AgCl as the reference electrode, the electrolyte solution is Na 2 SO 4 and Na 2 SO 3 , the concentration is 0.1mol / L. It can be found that Fe-MOF-2 is more responsive to visible light than Fe-MOF-1, and Fe-MOF-3 is more suitable as an anode for photocatalysis according to the positive and negativ...

Embodiment 2

[0075] The N-Zn-MOF photocatalytic cathode containing three different preparation ratios was selected, and the photocatalytic cathode with strong photoresponsiveness was determined by comparing its I-T curves. The electrode preparation ratio is as follows:

[0076] Table 2 Zn(NO 3 ) 2 .6H 2 Configuration of different ratios of O to glycolic acid

[0077]

[0078] Depend on Figure 8, it can be found that under visible light conditions, with Pt as the counter electrode and Ag / AgCl as the reference electrode, the electrolyte solution is Na 2 SO 4 and Na 2 SO 3 , the concentration is 0.1mol / L. It can be found that N-Zn-MOF-0.5 has more visible light responsiveness than N-Zn-MOF-0.75, and this type of electrode is more suitable as a cathode for photocatalysis.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Resistanceaaaaaaaaaa
Transmittanceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a self-biased dual-light electrode system which comprises a main reactor, an electrode fixing cover, a lead and a double-light electrode; the double-light electrode comprises aphotocathode and a photoanode; the photocathode is prepared by the following steps: dissolving Zn(NO3)2.6H2O powder and glycolic acid powder in an ethanol solution and then inserting an FTO electrodein hot water to obtain the N-Zn-MOF photocathode; the photoanode is prepared by the following steps: dissolving iron nitrate powder in DMF to obtain a solution A; dissolving 2-methyl imidazole powderin the DMF to obtain a solution B; dropwise adding the solution B in the solution A, uniformly mixing and then inserting an FTO electrode in hot water to obtain the Fe-MOF photoanode.

Description

technical field [0001] The invention relates to the technical field of high-efficiency visible light photocatalytic materials, in particular to a self-bias double photoelectrode system and its preparation method and application. Background technique [0002] The basic research of photocatalysis is very mature, but it is still difficult to be practically applied due to the constraints of two factors: the easy recombination of photogenerated electrons and holes and the difficulty of recycling powder catalysts. Loading nanoscale photocatalysts on conductive substrates to prepare membrane electrodes with high specific surface area, using photo-inert platinum sheets / titanium sheets / graphite as cathodes, under the action of applied voltage (≤3V), the photogenerated electrons pass through the external The circuit is transferred to the cathode to form a photoelectrocatalytic system (PEC), which can effectively inhibit the recombination of electron-hole pairs and avoid the complicate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/30C02F1/461C02F101/22
CPCC02F1/30C02F1/46109C02F2001/46133C02F2101/22
Inventor 王齐吴宏吴圣凯高桥远高慧敏夏文韬林大港范勇杰
Owner ZHEJIANG GONGSHANG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com