Preparation method of photo-anode of ZnS/Au/TiO2 nano composite film

Abstract

The invention relates to a preparation method of a photo-anode of a ZnS/Au/TiO2 nano composite film, relating to the photo-anode. The preparation method comprises the following steps of: carrying out etching treatment with a solution containing 10% (w) of HNO3 and 1% (w) of HF on a titanium foil as a substrate and cleaning the treated titanium foil; carrying out electrochemical anodic oxidation by using the substrate as an anode and a platinum piece as a cathode, cleaning and drying a prepared sample, and carrying out thermal treatment on the sample to obtain the substrate with a TiO2 nonatube array film prepared on the titanium surface; adding an NaOH solution into an HAuCl4 solution to obtain a mixed solution; and then placing the substrate with the TiO2 nonatube array film prepared on the titanium surface into the mixed solution to react to obtain the substrate with an Au-modified TiO2 nonatube array film; and by using a Zn(NO3)2 ethanol solution as a Zn source and a Na2S methyl alcohol solution as an S source, soaking the surface of the Au-modified TiO2 nonatube array film into the solutions which are used as the Zn source and the S source in sequence, and then cleaning the soaked film to obtain the photo-anode of the ZnS/Au/TiO2 nano composite film.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses hydrothermal process for purifying titania from its surfaces. It involves adding small amounts of gold or zinc onto certain materials that have specific properties such as high refractive index at visible light wavelength range. By doing this, these materials help separate electron pairs and create an electrical pathway through which charges move freely without being blocked off. These technical benefits include improved efficiency and reduced damage caused during use compared to other methods like electrochemistry.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding better materials for protecting metals from environmental stress crackings caused by various factors like salt concentration during storage/transport processes at high temperatures. Current methods involve modifying surfaces through different techniques, such as plasma spray coatings, ion implantation onto specific areas, atomic layer depositing layers containing transition elements, etc., while others focus their importance towards improved catalysics and electronic devices.

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