High-sensitivity photoelectrochemical sensor made from iridium oxide-ferriporphyrin-titanium oxide and preparation method for sensor

Abstract

The invention belongs to the technical field of photoelectrochemical sensors, and in particular relates to a high-sensitivity glutathione photoelectrochemical sensor made from iridium oxide-ferriporphyrin-titanium oxide and a preparation method for the sensor. The photoelectrochemical sensor takes an iridium oxide-ferriporphyrin-titanium oxide nano wire array as a working electrode, an Ag / AgCl electrode as a reference electrode and a platinum wire as a counter electrode; a PBS (phosphate buffer solution) with the pH of 7.4 is used as reaction electrolyte; the irradiation light intensity is equal to the sunshine, and the irradiation sectional area is 0.02-0.06cm<2>; the lowest sensitivity is 10nM. The preparation method comprises the steps of preparing a titanium oxide nano wire by adopting a hydrothermal method, bonding upper ferriporphyrin through chemical coupling, finally performing chemical immersion deposition on iridium oxide to prepare the iridium oxide-ferriporphyrin-titanium oxide nano wire array, and then preparing the photoelectrochemical sensor. The raw materials of the photoelectrochemical sensor are readily available; the preparation method is simple, environmentally-friendly, low in cost, high in response speed, large in linear range, high in selectivity and favorable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of photoelectrochemical sensors, in particular to a high-sensitivity glutathione photoelectrochemical sensor and a preparation method thereof. Background technique [0002] The photoelectrochemical process refers to the photoelectric conversion process of photosensitive materials through electronic excitation and charge transfer under the action of light. As an independent integrated detection device, electrochemical biosensors have had an increasingly important impact on the biochemical and medical fields. With the rapid development of nanotechnology and material chemistry, a new generation of photoelectrochemical (PEC) biosensors has been developed on the basis of the combination of photoelectrochemical processes and electrochemical biosensors, which provides a great opportunity for exploring various biological interactions. A new sensitive detection method. Essentially, like other established analytical...

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Problems solved by technology

A series of electrochemical detection methods for GSH have also been developed, but the high oxidation potential used in the detection limits the practical application of these electrochemical methods.

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