Selvakumar D, Dharmaraj N, Kadirvelu K, Kumar N S, Padaki V C
Defence Bioengineering and Electromedical Laboratory, Bangalore 560 093, India; Inorganic & Nanomaterials Research Laboratory, Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
Inorganic & Nanomaterials Research Laboratory, Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Dec 10;133:335-9. doi: 10.1016/j.saa.2014.05.074. Epub 2014 Jun 5.
Indium(III) hydroxide (In(OH)3) powders prepared via Triton X-100 mediated hydrothermal method was sintered at different temperatures (400, 500 and 600°C) to yield indium(III) oxide nanoparticles (In2O3 NPs). Thermal studies of In(OH)3 confirmed complete conversion to In2O3 around 400°C. Powder X-ray diffraction (XRD) pattern of sintered In2O3 nanoparticles revealed the formation of phase pure cubic In2O3. The crystallite size of In2O3 NPs was increased from 12 to 26nm upon increasing the sintering temperature from 400°C to 600°C, while the percentage crystallinity was increased up to 90% after sintering at 600°C. A red shift in the band gap energy was observed with increasing sintering temperature due to the larger size of sintered In2O3 NPs. Room temperature photoluminescence spectra of the indium oxide nanoparticles showed both near band and excitonic emission of In2O3 due to oxygen vacancies.
通过Triton X - 100介导的水热法制备的氢氧化铟（III）（In(OH)₃）粉末在不同温度（400、500和600°C）下烧结，以制备氧化铟（III）纳米颗粒（In₂O₃ NPs）。对In(OH)₃的热研究证实，在400°C左右完全转化为In₂O₃。烧结后的In₂O₃纳米颗粒的粉末X射线衍射（XRD）图谱显示形成了纯相立方In₂O₃。随着烧结温度从400°C提高到600°C，In₂O₃ NPs的微晶尺寸从12nm增加到26nm，而在600°C烧结后结晶度百分比提高到90%。由于烧结后的In₂O₃ NPs尺寸较大，随着烧结温度的升高，观察到带隙能量发生红移。氧化铟纳米颗粒的室温光致发光光谱显示，由于氧空位，同时存在In₂O₃的近带发射和激子发射。
