Preparation and photo-catalytic activity of TiO2-coated medical stone-based porous ceramics

• Published in: International journal of minerals, metallurgy and materials metallurgy and materials, 2013-06, Vol.20 (6), p.593-597
• Main Authors: Gao, Ru-qin, Hou, Xin-mei
• Format: Article
• Language: English
• Subjects: Anatase; Carriers; Catalytic activity; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Fine grinding; Formaldehyde; Glass; Low temperature; Materials Science; Medical; Mercury; Metallic Materials; Nanocomposites; Nanostructure; Natural Materials; Sintering (powder metallurgy); Spectrometry; Stone; Surfaces and Interfaces; Thin Films; Titanium dioxide; Tribology; X-ray diffraction; 二氧化钛涂层; 二氧化钛薄膜; 光催化活性; 制备; 化学液相沉积法; 多孔陶瓷; 扫描电子显微镜; 纳米TiO2
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-013-0771-y

Medical stone-based porous ceramics as a carrier were prepared by ultra-fine grinding and low-temperature sintering method. Nano-TiO~ thin films were loaded on the carrier by chemical liquid deposition method using titanium tetrachloride as a precursor. The micro-morphology and microstructure of the synthesized samples were characterized using X-ray diffraction, scanning electron microscopy with energy dispersive spectrometry, and mercury injection method. The photo-catalytic activity of the TiO2 thin films was investigated by degrading formaldehyde. The main crystalline phase in the TiO2 thin films calcined at 550~C is anatase with the average particle size about 10 nm. The specific surface area of the carrier-coated nano-TiO2 increases from 3.68 to 5.32 m2/g. The formaldehyde removal rate of the TiO2/medical stone-based porous ceramics irradiated under an ultraviolet lamp for 120 min reaches 85.6%.