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Doping amine functional groups into SiO2/TiO2 films for enhancing the decomposition of formaldehyde has been investigated
using the modified sol-gel method to prepare organic-inorganic hybrid photocatalysts via the co-condensation reaction of
methyltrimethoxysilane (MTMOS) and amine functional groups. n-(2-Aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPTMS)
and 3-aminopropyl-trimethoxysilane (APTMS) were selected to study the e ect of amine functional groups on the enhancement of
formaldehyde adsorption and degradation under a UV irradiation process. Physicochemical properties of prepared photocatalysts were
characterized with nitrogen adsorption-desorption isotherms measurement, X-ray di raction (XRD) and Fourier transform infrared
(FT-IR) spectroscopy. The results indicated that the APTMS/SiO2/TiO2 film demonstrated a degradation e ciency of 79% superior
to those of SiO2/TiO2 and AEAPTMS/SiO2/TiO2 films due to the synergetic e ect of adsorption and photocatalytic properties. The
APTMS/SiO2/TiO2 film can be recycled with about 7% decreasing of degradation e ciency after seven cycles. 相似文献
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