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

Photoinduced electrochemical sensor as well as preparation method and application thereof

A photoelectrochemical and sensor technology, applied in the fields of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of weak photogenerated electrons, poor conductivity, limited photoelectric conversion efficiency, etc.

Active Publication Date: 2022-05-24
SOUTHWEST UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional co-sensitization strategy, finding two cascaded sensitizing materials with matching energy levels is still a difficult problem, and the interface between different photoactive materials will also hinder charge transfer and limit the photoelectric conversion efficiency.
In addition, common cathode photoelectric materials have problems such as poor electrical conductivity, weak ability to attract photogenerated electrons on the electrode interface, and slow charge migration.

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
  • Photoinduced electrochemical sensor as well as preparation method and application thereof
  • Photoinduced electrochemical sensor as well as preparation method and application thereof
  • Photoinduced electrochemical sensor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] S-doped Bi according to the present invention 2 WO 6 (S:Bi 2 WO 6 ) was prepared by a simple hydrothermal reaction: first, 0.9701 g of hydrated Bi(NO 3 ) 3 Dissolve in 20mL ethylene glycol solution and stir for 30min, while adding 0.3297gNa 2 WO 4 ·2H 2 O was dissolved in 20 mL of ethylene glycol solution with continuous stirring for 30 min, and then the two were mixed and dispersed by ultrasonic until uniform. Then, thiourea was added as a sulfur source to the above mixed solution, and stirring was continued for 1 hour. Finally, the mixed solution was transferred to a 50 mL polytetrafluoroethylene-lined autoclave, and reacted at 180 °C for 24 h in a digitally temperature-controlled reaction furnace. The autoclave was cooled to room temperature naturally, and the gray precipitate was collected by centrifugation, washed several times with distilled water and 95% ethanol, and freeze-dried for use.

[0027] A series of S-doped Bis were synthesized by the same meth...

Embodiment 2

[0034] Construction of the sensor:

[0035] First, the glassy carbon electrode was polished with alumina powder and washed with ethanol and ultrapure water alternately ultrasonically. Next, PEDOT was added dropwise to the surface of the clean and dry glassy carbon electrode, and after being naturally dried to form a film, gold nanoparticles (AuNPs) were deposited on the PEDOT photocathode as a working electrode by electrodeposition. At the same time, S:Bi 2 WO 6 -1% solution was added dropwise to the surface of the same clean and dry glassy carbon electrode, and the photoanode was used as a counter / reference electrode to amplify the photocurrent signal (PEC signal was "on" state), from Figure 4 can be seen.

[0036]Next, the capture chain HP2 of the 5'-modified sulfhydryl group was assembled on the above-mentioned GCE / PEDOT / Dep Au photocathode interface through the Au-S coordination bond. At this time, the non-specific adsorption sites of the cathode interface were blocked ...

Embodiment 3

[0038] 1. The sensor was used to detect the standard solution of miRNA-141. The specific method is as follows:

[0039] 3) miRNA-141-mediated enzyme-assisted cyclic amplification reaction product output DNA formation: First, 120 μL, 2 μM hairpin DNA (HP1) was mixed with Fe 3 O 4 -Au solution was mixed and stirred overnight at 4°C to obtain Fe 3 O 4 -Au-HP1. Subsequently, the mixed solution was magnetically separated and washed and re-dispersed in 120 μL of phosphate buffer solution. 3 O 4 - Hexanethiol was added to the Au-HP1 mixture to block non-specific binding sites. Next, 20 μL miRNA-141, 0.5 μL double-strand-specific nuclease (DSN, 0.1 U) and 0.5 μL 1×DSN master buffer were added to Fe 3 O 4 The -Au-HP1-HT complex continued to react at 60°C for 40 minutes. During this process, the target miRNA-141 can interact with Fe 3 O 4 -HP1 on Au hybridizes to form a DNA-RNA mixed chain, the double-strand specific nuclease can specifically recognize and digest the DNA part ...

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

No PUM Login to View More

Abstract

The invention relates to a photoinduced electrochemical sensor, the photoinduced electrochemical sensor comprises a photoanode and a photocathode, the photoanode comprises a first electrode and Bi2WO6 and / or sulfur-doped Bi2WO6 located on the surface of the first electrode, and the photocathode comprises a second electrode and PEDOT located on the surface of the second electrode. The photoinduced electrochemical sensing provided by the invention provides a high-performance stable self-powered cathode PEC sensing platform for detecting miRNA.

Description

technical field [0001] The invention belongs to the field of optoelectronic materials and sensing, and in particular relates to a photoelectric chemical sensor and a preparation method and application thereof. Background technique [0002] In a self-powered cathodic photoelectrochemical (PEC) sensor, the excitation signal of the photoelectrochemical process is at the photoanode, and the target recognition process occurs at the photocathode, so it can effectively prevent the interference of non-specific redox reactions on the photoactive interface, thereby Avoid false positive signals and have strong anti-interference ability. Compared with optical detection methods, the self-powered cathode PEC sensor has the advantages of simple equipment, low cost and no external power supply, making it a simple, flexible, fast and sensitive method for molecular detection of tumor diseases and environmental pollutants. analytical skills. [0003] The self-powered cathode PEC sensor consi...

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): G01N27/416G01N27/30G01N27/327
CPCG01N27/416G01N27/305G01N27/308G01N27/3276G01N27/3278Y02P20/133
Inventor 刘红艳艾思敏刘永伟袁若
Owner SOUTHWEST 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