Novel composites of TiO2 (anatase) and silicate nanoparticles
Zhu, HY; Orthman, JA; Li, JY; Zhao, JC; Churchman, GJ; Vansant, EF
AbstractThermally stable composite nanostructures of titanium dioxide (anatase) and silicate nanoparticles were prepared from Laponite clay and a sol of titanium hydrate in the presence of poly(ethylene oxide) (PEO) surfactants. Laponite is a synthetic clay that readily disperses in water and exists as exfoliated silicate layers of about 1-nm thick in transparent dispersions of high pH. The acidic sol solution reacts with the clay platelets and leaches out most of the magnesium in the clay, while the sol particles hydrolyze further due to the high pH of the clay dispersion. As a result, larger precursors of TiO2 nanoparticles form and condense on the fragmentized pieces of the leached silicate. Introducing PEO surfactants into the synthesis can significantly increase the porosity and surface area of the composite solids. The TiO2 exists as anatase nanoparticles that are separated by silicate fragments and voids such that they are accessible to organic molecules. The size of the anatase particle can be tailored by manipulating the experimental parameters at various synthesis stages. Therefore, we can design and engineer composite nanostructures to achieve better performance. The composite solids exhibit superior properties as photocatalysts for the degradation of Rhodamine 6G in aqueous solution.
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WOS IDWOS:000180016600022
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Document Type期刊论文
Corresponding AuthorZhu, HY
Affiliation1.Univ Queensland, Dept Chem Engn, St Lucia, Qld 4072, Australia
2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
3.CSIRO Land & Water, Glen Osmond, SA 5064, Australia
4.Univ Instelling Antwerp, Dept Chem, Lab Adsorpt & Catalysis, B-2610 Wilrijk, Belgium
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GB/T 7714
Zhu, HY,Orthman, JA,Li, JY,et al. Novel composites of TiO2 (anatase) and silicate nanoparticles[J]. CHEMISTRY OF MATERIALS,2002,14(12):5037-5044.
APA Zhu, HY,Orthman, JA,Li, JY,Zhao, JC,Churchman, GJ,&Vansant, EF.(2002).Novel composites of TiO2 (anatase) and silicate nanoparticles.CHEMISTRY OF MATERIALS,14(12),5037-5044.
MLA Zhu, HY,et al."Novel composites of TiO2 (anatase) and silicate nanoparticles".CHEMISTRY OF MATERIALS 14.12(2002):5037-5044.
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