Non-enzyme sensor, non-enzyme sensor element and fabricating method thereof
A fabricating method of a non-enzyme sensor element includes a printing step, a coating step and an electroplating step. In the printing step, a conductive material is printed on a surface of a substrate to form a working electrode, a reference electrode and an auxiliary electrode, and a porous carbon material is printed on the working electrode to form a porous carbon layer. In the coating step, a graphene film material is coated on the porous carbon layer of the working electrode to form a graphene layer. In the electroplating step, a metal is electroplated on the graphene layer by a pulse constant current to form a catalyst layer including a metal oxide.
1. A fabricating method of a non-enzyme sensor element, comprising:
a printing step, wherein a conductive material is printed on a surface of a substrate to form a working electrode, a reference electrode and an auxiliary electrode, and a porous carbon material is printed on the working electrode to form a porous carbon layer;
a coating step, wherein a graphene film material is coated on the porous carbon layer of the working electrode to form a graphene layer; and
an electroplating step, wherein an electroplating solution is prepared and used to electroplate a metal on the graphene layer by a pulse constant current to form a catalyst layer including a metal oxide, and
wherein the electroplating solution is used to oxidize the electroplated metal to form the metal oxide of the catalyst layer.
2. The fabricating method of the non-enzyme sensor element of claim 1 , further comprising an activating step, wherein the metal oxide is transformed to a metal hydroxide in the activating step.
3. The fabricating method of the non-enzyme sensor element of claim 1 , wherein the metal provided in the electroplating step is a transition metal.
4. The fabricating method of the non-enzyme sensor element of claim 3 , wherein the transition metal is nickel.
5. The fabricating method of the non-enzyme sensor element of claim 1 , wherein the electroplating solution includes a nitrate-metal compound, a sulfuric acid and a boric acid.