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二氧化钛作为重要的新能源和环境保护材料,在光催化、太阳能发电、太阳能集热等方面被广泛应用。然而,二氧化钛的太阳能利用面临巨大的挑战,主要原因在于光吸收范围窄、电子-空穴对的分离效率低。二氧化钛只能吸收太阳光谱中约5%的紫外光,而无法利用可见光和近红外光的能量;本征电导率只有约10~(-10)S/cm,不利于光生电子-空穴对的分离和传输。这些问题严重影响了二氧化钛在能源与环境领域的广泛应用,无法充分利用太阳能。
As an important new energy and environmental protection material, titanium dioxide is widely used in photocatalysis, solar power generation and solar heat collection. However, the solar energy utilization of titanium dioxide faces enormous challenges, mainly due to the narrow light absorption range and the inefficient separation of electron-hole pairs. Titanium dioxide absorbs only about 5% of the UV light in the solar spectrum and does not utilize the energy of visible and near-infrared light. The intrinsic conductivity is only about 10 -10 S / cm, which is detrimental to photogenerated electron-hole pairs Separation and transmission. These problems seriously affect the titanium dioxide in the field of energy and environmental applications, can not make full use of solar energy.