CoO and Ag modified TiO2 composite nanotube array photo-anode and preparation method thereof

• Main Authors: QI FENG, SHI ZHENLONG, LIU JIAYUE, CAO GUOMIN, NI GUANGDI, LI ZEYU, WANG MENGMENG, CAO DANFU, GAN BANG, MA KAIJUN
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

The invention relates to the technical field of nano materials, in particular to a CoO and Ag modified TiO2 composite nanotube array photo-anode and a preparation method thereof. The method comprises the following steps: carrying out Ag nano particle modification on a TiO2 nano tube array film to obtain an Ag modified TiO2 nano tube array film, and then carrying out CoO nano particle modification on the Ag modified TiO2 nano tube array film to obtain the CoO and Ag modified TiO2 composite nano tube array photo-anode. According to the method, CoO nanoparticles are adopted for modification, so that holes can be unidirectionally transferred from TiO2 to CoO, the overpotential of water oxidation reaction on the surface of TiO2 is reduced, the TiO2 hole consumption rate is effectively increased, and the TiO2 photo-generated cathode protection performance is improved; the CoO and Ag modified TiO2 composite nanotube array photo-anode disclosed by the invention has excellent photoelectric property and can effectively