Mechanics, Materials Science & Engineering, April 2017 – ISSN 2412-5954
Temperature Based Investigation on Structure and Optical Properties of Bi2S3 Nanoflowers by Solvothermal Approach43 J. Arumugam1, A. Dhayal Raj1, a, A. Albert Irudayaraj1, T. Pazhanivel2 1 – Department of Physics, Sacred Heart College, Tirupattur, Vellore Dist, Tamilnadu, India 2 – Department of Physics, Periyar University, Salem, Tamilnadu, India a – dhayalraj03@gmail.com DOI 10.2412/mmse.73.16.231 provided by Seo4U.link
Keywords: Bi2S3 nanostructures, XRD, SEM, UV-Vis, FTIR.
ABSTRACT. A solvothermal process has been employed to synthesis Bi2S3 nanostructures which has a wide spread applications in photodiode, hydrogen storage, high energy batteries, as well as luminescence and catalytic fields. Bismuth nitrate, thiourea and PolyVinyPyrrolidene (PVP), used as the starting materials are dissolved in ethylene glycol for different reaction times. It was found that the temperature plays a key role in determining the shape of the products. The crystalline phase and structure of the Bi2S3 nanostructures were investigated by power X-ray diffraction (XRD). The surface morphology has been analyzed by Scanning electron microscopy (SEM), the optical properties of the Bi2S3 nanoparticles were analyzed using UV-Vis spectroscopy. The functional groups present in the Bi2S3 nanoparticles were characterized by FT-IR spectroscopy. The novel Bi2S3 nanoparticles will be exploited for its application as photocatalyst.
Introduction. Recently, nanostructured materials have gained their importance in science and technology due to their novel optical, electric, magnetic and catalytic properties as compared to the corresponding bulk counter parts due to their large surface areas, smaller size, reduced numbers of free electrons and possible quantum confinement effects [1]. The integration of one-dimensional nanoscale building blocks into two-and three-dimensional ordered superstructures or complex functional architectures, which not only open up possibilities for advanced nanodevices but also offers opportunities to explore their novel collective properties, has recently been proposed [2]. In particular, nanostructures like nanopariticles and nanoflowers of semiconductor materials have attracted much attention due to their possible applications in nanoscale electronic and optoelectronic devices. Nanowiskers so called by reason off their appearance have become the subject of intensive study in recent years because of their remarkable characteristics [3]. However, the organization of building blocks into ordered patterns through direct manipulation receives increasing research interest in the synthesis of nanomaterials. Bismuth sulfide (Bi2S3) is one of the most studied semiconductors with Eg of 1.3eV [4] owing to its wide spread applications, such as photodiode arrays, photovoltaic converters, photodetectors, thermoelectric and electrochemical hydrogen storage as an imaging agent in X-ray computed tomography, in biomolecules detection, H2 sensing and so on. Extensive research has been focused on the synthesis of one dimensional Bi2S3 nanostructures in a controlled fashion by various methods [5]. Qiaofeng Han et al., have reported the Orthorhombic Bi2S3 nanorods with diameters in the ranging of 20-35 nm and with lengths of hundreds of nanometers by hydrothermal treatment [6]. Xuefeng Qian et al., have reported Bi2S3 naniwiskers through microwave method and influence of PVP and sulfur sources on the morphology of the prepared Bi2S3 have also been reported [3]. Yonghong Ni et al., have reported flowerlike Bi2S3 microspheres and have studied catalytic activity 43
© 2017 The Authors. Published by Magnolithe GmbH. This is an open access article under the CC BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/
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