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Powder Quartz/Nano-TiO2 Composite: Mechanochemical Preparation and Photocatalytic Degradation of Formaldehyde

Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1381-1386页

作者： WANG Binbin DENG Yuequan HE Ping State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials Mianyang 621010China School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education Southwest University of Science and TechnologyMianyang 621010China

Powder quartz(PQ)/nano-TiO2composite was prepared by a mechanochemical method. Based on as-prepared PQ/nano-TiO2composite, we prepared interior paints and investigated the degradation efficiency of formaldehyde(DEF). Scanning electron microscopy showed that nano-TiO2got well dispersed by the adding of PQ. Thermogravimetric analysis indicated that the mass ratio of 4:1 was a relatively good proportion for the most production of PQ/nano-TiO2composite. Fourier transform-infrared spectrometry showed that the peak position of Ti-O-Si bond varied with the milling time. At the early stage, no characteristic peak of Ti-O-Si bond was observed, while at the later stage, new peaks at 902 cm-1and 937 cm-1appeared. Meanwhile, PQ/nano-TiO2composite-based interior paint exhibited significant DEF of 96.3% compared to that consisting of sole nanoTiO2of 92.0% under visible light illumination. As an abundant mineral resource, PQ would make interior paints with HCHO purifying effect much more efficient and cheaper.

关键词： powder quartz nano-TiO2 interior paint formaldehyde

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