Abstract
A Fe3+-doped SiO2/TiO2 composite film (Fe3+-doped STCF) was prepared on a wood surface via a sol–gel method to improve its photocatalytic activity and hydrophobicity. The structure of the composite film was analyzed by Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity toward degradation of methyl orange and its hydrophobic nature were investigated. The results showed that the composite film was anatase TiO2 crystal form, and the addition of Fe3+ ions and SiO2 enhanced the diffraction peaks for the anatase crystal form. The photocatalytic activity of the wood coated with the composite film was enhanced. The highest degradation percentage was at 1 wt % Fe3+ (40.37%), and the degradation ability of the wood towards methyl orange solution was further improved under acidic conditions. In addition, the composite film was hydrophobic, and the hydrophobic property was enhanced as the immersion time in the sol increased. The wood surface coated with Fe3+-doped STCF exhibited strong hydrophobicity and photocatalytic activity, which could effectively prevent moisture from adhering to the surface and degrade organic pollutants; thus, the modified wood surface had good self-cleaning function.
Highlights
Wood is the only renewable resource among the four major materials and is widely used in home furniture, construction, and other fields because of its good aesthetic characteristics and environmental friendliness
5 above shows the contact angles of wood samplescoated coated with STCF
The Fe3+ -doped STCF was prepared on the surface of wood via a sol–gel method
Summary
Wood is the only renewable resource among the four major materials and is widely used in home furniture, construction, and other fields because of its good aesthetic characteristics and environmental friendliness. Wood surfaces in actual use are susceptible to interference from external factors, which change their physical and chemical properties. Wood is hydrophilic, and after water adheres to the wood surface, the hygroscopicity and dimensional stability of the wood changes leading to defects such as deformation [1,2,3]. Contaminants attached to the wood surface will change the color and even change the chemical structure of the wood surface causing adverse effects. Wood’s own defects can seriously affect its use, and it is necessary to modify the wood so that self-cleaning surfaces can be achieved. The modification of wood surface gives it photocatalytic activity and hydrophobicity, which are important topics in modern lumber
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