Inorganic/organic semiconductor nano-composite structure and preparation method and application thereof

Abstract

The invention discloses an inorganic / organic semiconductor nano-composite structure and a preparation method and an application thereof. The preparation method comprises the following steps: etching and cleaning a titanium foil serving as a substrate to obtain a titanium substrate, obtaining an inorganic semiconductor TiO<2> nanotube array on the surface of the titanium substrate by means of a positive electrode oxidation method; and depositing a layer of perylenetetracarboxylic diimide organic semiconductor film on the surface of the TiO2 nanotube array serving as a growing substrate through a physical vapor deposition method to obtain the inorganic / organic semiconductor nano-composite structure. Meanwhile, nano-composite structures with different organic film deposition amounts can be realized by changing the substrate position of the TiO<2> nanotube array. The method is simple and feasible, and an experimental basis is laid for a hierarchical assembly of inorganic and organic semiconductor materials. As proved by a result of research on the application of the obtained nano-composite structure in the field of photocatalytic hydrogen production by water decomposition of photo-electrochemical cells, the structure has efficient photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalysis, and specifically relates to an inorganic / organic semiconductor nanocomposite structure, a preparation method and its application in photoelectrochemical cell photolysis of water to produce hydrogen. Background technique [0002] With the development of society, energy shortage and environmental pollution have become the focus of people's attention. Photocatalytic technology can convert solar energy into electrical energy and chemical energy, and has broad application prospects in the fields of energy conversion and environmental governance. Among them, photoelectrochemical photolysis of water to produce hydrogen is an important aspect of solar energy utilization, which has attracted widespread attention from various countries because of its low cost and the integration of light conversion and storage. [0003] As a kind of widely used photocatalytic materials, inorganic semiconductors...

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Problems solved by technology

But TiO 2 The self-absorption band is narrow (band gap 3.0~3.2ev) and fixed, which limits the utilization rate of solar energy; perylene tetraacid diimide is a kind of photothermal stability and durability, wide spectral absorption range, photoelectric conversion High-efficiency organic semiconductor materials, with absorption peaks in the range of 450-600nm in the visible region, are widely used in solar cell materials, photoconductive materials and other fields (ShuaiChen, RSCAdv., 2014, 4, 48486–48491)

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