A kind of preparation method of iron oxide nanoribbon array thin film

Abstract

The invention relates to a method for preparing a ferric oxide nanoribbon arrayed film. According to the method, the ferric oxide nanoribbon arrayed film is prepared through preparing a palladium nanoparticle film on a preoxidized iron sheet by adopting a spin coating method according to structural features of ferric oxide in a manner that palladium particles are attached to roots of nanoribbons in a spherical shape, and then, carrying out thermal treatment under the protection of inert gas; the product is of a black film, the film is formed through arraying ferric oxide nanoribbons, and the nanoribbons are uniform and dense and have the length of not greater than 9 microns and the width of not greater than 180nm; the nanoribbons are of ferric oxide monocrystalline structures and have theoxygen vacancy spacing of 1.57nm; the structure can be applied to photocatalytic organic matter degradation and photoelectrocatalysis hydrogen production, and the method for preparing the ferric oxidenanoribbon arrayed film is advanced.

Description

technical field [0001] The invention relates to a method for preparing an iron oxide nanobelt array film, which belongs to the technical field of preparation and application of inorganic functional materials. Background technique [0002] Since the 21st century, the two major problems of energy shortage and environmental degradation have gradually attracted people's attention, because they have become two major crises that restrict human progress and social development; because the photolysis water hydrogen production system can convert unstable solar energy into hydrogen energy It not only improves the utilization rate of solar energy and water energy, but also produces clean and renewable hydrogen energy, making it an ideal choice for solving the two major crises of energy shortage and environmental degradation; α-iron oxide nanomaterials are characterized by their resources Abundance, low price, good photocatalytic stability, and suitable band gap have become the most pot...

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Problems solved by technology

[0002] Since the 21st century, the two major problems of energy shortage and environmental degradation have gradually attracted people's attention, because they have become two major crises that restrict human progress and social development; because the photolysis water hydrogen production system can convert unstable solar energy into hydrogen energy It not only improves the utilization rate of solar energy and water energy, but also produces clean and renewable hydrogen energy, making it an ideal choice for solving the two major crises of energy shortage and environmental degradation; α-iron oxide nanomaterials are characterized by their resources Abundance, low price, good photocatalytic stability, and suitable band gap have become the most potential materials for photolysis of water; due to poor conductivity, short hole diffusion length, and high overpotential disadvantages, it limits its large-scale application. Application; In order to improve the performance of α-iron oxide photolysis of water, it is necessary to improve the conductivity of α-iron oxide, increase the hole diffusion length of α-iron oxide, reduce the overpotential of α-iron oxide, etc.; currently improve the α-oxidation The methods of iron photocatalytic water splitting performance mainly include doping, shape control, construction of heterojunction and surface modification; the nanoribbon structure can accelerate the electron-hole transport, and also increase the light absorption efficiency of iron oxide The self-doping of oxygen holes can effectively increase the concentration of iron oxide carriers, improve its conductivity, significantly increase the photocurrent density of iron oxide, and reduce the initial voltage of iron oxide. Ordered iron oxide nanoribbon array is a very effective means to improve the photoelectric performance of iron oxide, and this technology is still under scientific research

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