期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 12, 期 3, 页码 1957-1966出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2012.5187
关键词
In2TiO5 Nanoparticles; Solvothermal Synthesis; Mechanism; Photocatalytic Hydrogen Generation; HRTEM
A low temperature surfactant-free solution-phase method has been successfully developed for the synthesis of ternary In2TiO5, nanoparticles using a solvothermal route. The mechanistic aspects of synthesis of In2TiO5 nanoparticles from precursors, In(acac)3 and Ti(IV) isopropoxide in benzyl alcohol at 220 degrees C under solvothermal conditions, were investigated by GC-MS and C-13{H-1} NMR analysis. The N-2-BET surface area of the 5-8 nm sized In2TiO5 nanoparticles was found to be 60 m(2)g(-1), which decreased with increase in calcination temperature; 38 m(2)g(-1) at 800 degrees C; 5 m(2)g(-1) at 1200 degrees C. The High resolution transmission electron microscopy (HR-TEM) shows well-developed lattice fringes of the crystalline nanoparticles, and selected area electron diffraction (SAED), pattern was indexed to be orthorhombic In2TiO5. The nanoparticles show better photocatalytic hydrogen generation from water-methanol mixtures over bulk In2TiO5, anatase TiO2 nanoparticles prepared by identical route and commercial TiO2 photocatalyst (Degussa, P25) under UV-visible irradiation (16% UV + 84% visible). Photocatalytic properties as a function of crystallinity and surface area of indium titanate nanoparticles have also been investigated. The high photoactivity obtained is correlated with the electronic and crystal structure of In2TiO5.
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