Preparation method of BVO/CN/Co photo-anode sensor

Abstract

The invention provides a preparation method of a BVO / CN / Co photo-anode sensor. The preparation method comprises the following steps: step 1, preparing a bismuth vanadate substrate; step 2, spin-coating 50 microliters of carbon nitride dispersion liquid on a bismuth vanadate film for three times, and carrying out heat treatment at 250 DEG C for 30 minutes to obtain a bismuth vanadate carbon nitride photo-anode; and preparing a Co catalyst into a 0.5 mM solution, soaking the obtained bismuth vanadate carbon nitride photo-anode for 2 minutes, and annealing for 30 minutes to obtain the BVO / CN / Co photo-anode sensor. In the construction of the BVO / CN / Co photo-anode sensor, the carbon nitride and the Co cocatalyst have a synergistic effect, so that the promotion effect is achieved in the aspects of reducing the surface state, improving the carrier concentration and increasing reaction active sites, and the photoelectric property of the photo-anode is greatly improved; after the pi-rich material and the bismuth vanadate material are introduced and compounded, the organic conjugated material is utilized to adsorb the aptamer, so that the manufacturing cost of the sensor is reduced.

Description

technical field [0001] The invention belongs to the field of sensors; in particular, it relates to a preparation method of a BVO / CN / Co photoanode sensor. Background technique [0002] At present, a simple, rapid and sensitive biomolecular analysis method is one of the most important and popular research topics in analytical chemistry. Especially in the fields of disease diagnosis, environmental monitoring, drug analysis, food safety analysis, life analysis and pathogenic microorganism research. Photoelectrochemical (PEC) analysis method is a new type of analysis method developed after optical, photochemical and electrochemical methods. It has obvious advantages such as simplicity, high efficiency, low background signal, high sensitivity, and good stability, so it has received great attention and extensive research from scholars. During the development of PEC biosensors, the screening of optoelectronic materials with excellent performance, the combination of efficient signa...

AI Technical Summary

Problems solved by technology

[0007] In summary, the current research on semiconductor photoelectric biosensors is mainly focused on the biometric unit, such as combining nucleic acid amplification technology with photoelectric technology to increase the signal of the detected object, but this will bring more complicated operations.

Moreover, many studies use noble metals to bind suitable ligands, which increases the cost of the sensor and is not conducive to practical applications.

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