Nano-composite photo-anode material with Z-type CuInS2/TiO2 heterostructure and preparation method and application of nano-composite photo-anode material

Abstract

The invention relates to the field of photoelectrochemical anticorrosion protection, in particular to a nano-composite photo-anode material of a Z-type CuInS2 / TiO2 heterostructure and preparation and application of the nano-composite photo-anode material of the Z-type CuInS2 / TiO2 heterostructure. Preparing a TiO2 nanotube by an electrochemical anodic oxidation method; the preparation method comprises the following steps: soaking CuInS2 quantum dots in a cysteine solution, calcining the CuInS2 quantum dots at high temperature in a muffle furnace by a one-step hydrothermal method, and enabling the CuInS2 quantum dots to grow on TiO2 nanotubes in situ to obtain the Z-type CuInS2 / TiO2 heterostructure nano composite photo-anode material. The problems that a traditional TiO2 material is low in sunlight utilization rate, photon-generated carriers are prone to recombination and the like are solved, the light absorption range of TiO2 is widened through loading of the narrow-band-gap semiconductor material, and meanwhile the nano-composite photo-anode material which has high photoelectric conversion efficiency and can provide electron cathode protection for protected metal is obtained.

Description

technical field [0001] The invention relates to the field of photoelectrochemical anticorrosion protection, in particular to a Z-type CuInS 2 / TiO 2 Heterostructure nanocomposite photoanode materials and their preparation and application. Background technique [0002] Corrosion is the slow process of eroding, wearing down or destroying something by natural forces such as the atmosphere, soil and water. Among them, the ocean accounts for 70% of the earth's surface area. Due to the enrichment of bacteria and chloride ions, seawater has become the largest and most corrosive natural electrolyte in nature. According to the survey, factories in coastal areas often use seawater as a cooling medium. Coolers The cast iron pipe can only be used for 3 to 4 years due to long-term contact with seawater; the cast iron impeller of the seawater pump can only be used for about 3 months; the corrosion rate of the inner wall of the carbon steel cooling box can reach more than 1mm / a, and mari...

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Problems solved by technology

[0004] The focus of photogenerated cathodic protection technology is to find semiconductor materials with excellent photoelectric conversion efficiency. Although TiO has many advantages 2 It has always been a research hotspot, but due to its wide bandgap, its photoresponse range is limited to the ultraviolet region, which affects the photoelectrochemical cathodic protection of metals.

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