Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles
Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles
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DOI：
10.1590/1980-5373-mr-2016-0292
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发表时间：
2017-02-01
期刊：
影响因子：
--
通讯作者：
Shridhar, D.
中科院分区：
文献类型：
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作者：
Latha, Ch. Kanchana;Raghasudha, Mucherla;Shridhar, D.
以十六烷基三甲基溴化铵（CTAB）和多烷基苯磺酸钠（SDBS）为表面活性剂，通过金合木介导法制备了氧化铟（In2O3）纳米颗粒。采用XRD、FTIR、RAMAN、TEM、SEM、EDAX、UV-Vis和PL等技术对合成的纳米In2O3进行表征。通过TG-DTA分析了解了In2O3纳米颗粒的煅烧温度。XRD分析证实了合成的In2O3纳米颗粒的结晶性。通过TEM、SEM和EDAX对其形貌和化学成分进行了表征。通过TEM和SEM分析发现，合成的纳米颗粒的形貌和大小取决于所使用的封盖剂（表面活性剂）的类型。Raman和UV-Vis光谱分析证实，CTAB包覆的In2O3颗粒的带隙值大于SDBS包覆的In2O3颗粒。FTIR分析表明，与CTAB相比，SDBS覆盖的In2O3颗粒的条带被拉长。从光致发光研究（PL技术）中，观察到CTAB和SDBS覆盖的In2O3颗粒的发射峰蓝移，表明光学带隙比体大。
The Indium Oxide (In2O3) nanoparticles were synthesized through Acacia gum mediated method with the surfactants CTAB (Cetyl Trimethyl Ammonium Bromide) and SDBS (Sodium Docecyl Benzene Sulfonate). The characterization of the synthesized In2O3 nanoparticles was carried out by XRD, FTIR, RAMAN, TEM, SEM, EDAX, UV-Vis and PL techniques. TG-DTA analysis was performed to know the calcination temperature of In2O3 nanoparticles. XRD analysis confirmed the crystalline nature of the synthesized In2O3 nanoparticles. The morphology and chemical composition were characterized by TEM, SEM and EDAX respectively. It was observed that morphology and size of synthesized nanoparticles measured by TEM and SEM analysis were dependent on the type of capping agent (surfactant) used. Raman and UV-Vis spectral analysis confirmed that the band gap value of CTAB capped In2O3 particles were larger than the SDBS capped In2O3 particles. FTIR analysis indicated that the bands were stretched in In2O3 particles capped by SDBS than by CTAB. From the photoluminescence studies (PL technique), a blue shift in the emission peaks of CTAB and SDBS capped In2O3 particles was observed that indicates larger optical band gap than the bulk.