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METHOD FOR IMPROVING SOLAR ENERGY CONVERSION EFFICIENCY USING METAL OXIDE PHOTOCATALYSTS HAVING ENERGY BAND OF CORE-SHELL FOR ULTRAVIOLET RAY AND VISIBLE LIGHT ABSORPTION AND PHOTOCATALYSTS THEREOF
METHOD FOR IMPROVING SOLAR ENERGY CONVERSION EFFICIENCY USING METAL OXIDE PHOTOCATALYSTS HAVING ENERGY BAND OF CORE-SHELL FOR ULTRAVIOLET RAY AND VISIBLE LIGHT ABSORPTION AND PHOTOCATALYSTS THEREOF
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机译:利用具有核壳的紫外线能带和可见光吸收和光催化作用的金属氧化物光催化剂提高太阳能转化效率的方法
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摘要
The present invention discloses a method for improving solar energy conversion efficiency using metal oxide photocatalysts having an energy band of core-shell structure for ultraviolet (UV) ray and visible light absorption, comprising a first process of forming a nanoparticle thin film layer; a second process of preparing a core-shell metal oxide on metal oxide nanoparticles by a plasma reaction under a hydrogen and nitrogen gas atmosphere, and a third process of depositing a transition metal on surfaces of core-shell metal oxide nanoparticles to produce a photocatalyst for energy conversion. A great amount of oxygen vacancies is formed in a shell region by the core-shell metal oxide to achieve effects of improving transfer ability of electron-hole pairs excited by light, and extending a wavelength range of absorbable light to a visible light region by changing a band-gap structure.
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