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>K, Na and Cl co-doped TiO2 nanorod arrays on carbon cloth for efficient photocatalytic degradation of formaldehyde under UV/visible LED irradiation
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K, Na and Cl co-doped TiO2 nanorod arrays on carbon cloth for efficient photocatalytic degradation of formaldehyde under UV/visible LED irradiation
For applicable air purifiers to decompose formaldehyde, it is important to develop TiO2 based photocatalysts that can be irradiated under visible light and can be anchored on a soft carbon cloth substrate. Herein, we report that rutile TiO2 nanorod arrays were grown on carbon cloth (TiO2@CC) by a seed assisted hydrothermal method and subsequently heated with a KCl and NaCl covering to promote K, Na, and Cl ions doping into the TiO2 nanorods. K, Na, and Cl doping tunes the energy band structure of rutile TiO2, while the carbon fibers facilitate the electron transfer, improving its photocatalytic activity. Thus, the alkali metal (K, Na) and halogen (Cl) co-doped rutile TiO2 nanorod arrays (KNCTC) exhibited better photocatalytic degradation of gaseous formaldehyde (HCHO) under UV and visible light irradiation than pure TiO2. TiO2 nanorod arrays anchored on soft carbon cloth facilitate the design of an air purifier for degrading formaldehyde.
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