Preparation of Nano Tungsten Trioxide Thin Films by Electrodeposition
Nano tungsten trioxide is an excellent N-type semiconductor gas sensor, compared with the traditional materials, nano-tungsten trioxide gas sensor, high sensitivity, faster response speed and faster recovery is the most studied in recent years gas sensitive raw materials. There are methods for the synthesis of nano tungsten oxide films or gas phase method and solid phase method, liquid phase method. Electrodeposition is a gas phase method for preparing nano tungsten trioxide thin film, it is in a certain electrolyte and operating conditions, the metal or alloy from the compound solution, non aqueous solution or molten salt electrochemical deposition. The basic process of electrodeposition in preparing WO 3 thin films is: first, dissolve the W powder in a certain proportion with H 2 O 2 , then remove the excess H 2 O 2 , get the electrolyte solution and deposit it naturally, then use Pt as the working electrode and the other as the counter electrode. The WO 3 thin film can be...