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1. (WO2017193415) METHOD FOR PREPARING GRAPHENE MODIFIED COMPOSITE PLANAR PH SENSOR

Pub. No.:    WO/2017/193415    International Application No.:    PCT/CN2016/082578
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Fri May 20 01:59:59 CEST 2016
IPC: G01N 27/30
Applicants: JIANGSU UNIVERSITY
江苏大学
Inventors: ZHANG, Xiliang
张西良
XU, Kun
徐坤
CUI, Shoujuan
崔守娟
GENG, Miaomiao
耿妙妙
LI, Pingping
李萍萍
ZHANG, Shiqing
张世庆
Title: METHOD FOR PREPARING GRAPHENE MODIFIED COMPOSITE PLANAR PH SENSOR
Abstract:
A method for preparing a graphene modified composite planar PH sensor. On a substrate the front side and the back side of which are slotted and coated with a copper foil, a wire is led out by being connected to the copper foil, and a first graphene film and a second graphene film are respectively deposited on the upper surface and the lower surface of the copper foil by using a micromechanical cleavage method; a Sb layer and a Sb2O3 layer are deposited on the surface of the first graphene film by means of a magnetron sputtering method, and then the outer surface of the Sb2O3 layer is coated with a Nafion layer by using a spin-coating method, so as to prepare a working electrode; an Ag layer is deposited on the surface of the second graphene film by using the magnetron sputtering method and then soaked in the FeCl3 solution, so as to generate a AgCl layer on the surface; and finally, a third graphene film is deposited on the surface of the AgCl layer by using a micromechanical cleavage method, so as to prepare a reference electrode. The pH sensor prepared by using the method for preparing a graphene modified composite planar PH sensor has the advantages of being quick in response, high in stability and reproducibility and the like, and can be applied to pH testing of solid, semisolid and paste containing a certain amount of water and pH testing of a solution.