NDLI: Synthesis of APTMS-Functionalized SiO$_{2}$/TiO$_{2}$ Transparent Film Using Peroxo Titanic Acid Refluxed Solution for Formaldehyde Removal

Content Provider	SpringerLink
Author	Photong, Somjate Boonamnuayvitaya, Virote
Copyright Year	2009
Abstract	Amine-functionalized SiO$_{2}$/TiO$_{2}$ photocatalytic films have been synthesized using the peroxo titanic acid (PTA) approach coupled with the sol-gel dip-coating method. The 3-aminopropyl-trimethoxysilane (APTMS) and methyltrimethoxysilane (MTMOS) were employed as the amine functional groups and silica precursor. The effects of the ratio of APTMS/MTMOS, PTA refluxed time, and pH of prepared sol on the characteristics and the formaldehyde degradation efficiency were investigated. Physicochemical properties of prepared photocatalysts were characterized with nitrogen adsorption–desorption isotherm measurement, SEM, X-ray diffraction (XRD), UV-vis spectrophotometer, and Fourier transform infrared (FTIR) spectroscopy. The XRD and FTIR results indicated that the obtained photocatalysts consisted of –NH$_{2}$ groups, SiO$_{2}$, and anatase TiO$_{2}$. The photocatalytic films showed high transmittance of 80–90% in the visible light region. The obtained film prepared with the APTMS/MTMOS ratio of 0.03, pH of 1.8, and 10 h of refluxed time possessed high specific surface area (604.0 m$^{2}$ g$^{−1}$) and 85% formaldehyde degradation efficiency. The enhancement of formaldehyde degradation efficiency was observed when increasing the PTA refluxed time. The repeatability of photocatalytic film was also tested, and the degradation efficiency was 92.0% of initial efficiency after seven cycles.
Starting Page	453
Ending Page	461
Page Count	9
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	210
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-11-27
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Photocatalyst Peroxo titanic acid Formaldehyde Amine functionalization TiO$_{2}$ 3-Aminopropyl-trimethoxysilane Methyltrimethoxysilane Climate Change Hydrogeology Soil Science & Conservation Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Environment
Content Type	Text
Resource Type	Article
Subject	Pollution Environmental Engineering Water Science and Technology Environmental Chemistry Ecological Modeling

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