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3 Available online at www.scholarsresearchlibrary.com Scholars Research Library European Journal of Applied Engineering and Scientific Research, 2012, 1 (4):235-240 (http://scholarsresearchlibrary.com/archive.html) Synthesis, characterization of TiO2 nano powder and water based nanofluids using two step method 123 Kavitha T , Rajendran A , Durairajan A Department of Physics, Nehru Memorial College, Puthanampatti, Tiruchirapalli, Tamilnadu, India. Department of Physics, Nehru Memorial College, Puthanampatti, Tiruchirapalli, Tamilnadu, India. Department of Mechanical Engineering, K.S.R. College of Engineering, Tiruchengode, Tamil Nadu, India. ________________________________________________________________________________________ ABSTRACT This paper summarizes some of our recent research work on the synthesis of nanofluids (dilute liquid suspensions of nanoparticles). The Crystalline size of TiO2 powder was found to ~6 nm for anatase at 400 oC by controlling the acidity. TiO2 Key words: Nano Tio2, Nano particles, SEM, XRD, Nano fluids. _____________________________________________________________________________________________ INTRODUCTION Nanofluids are a new class of fluids engineered by dispersing nanometer-sized materials (nanoparticles, nanofibers, nanotubes, nanowires, nanorods, nanosheet, or droplets) in base fluids. Common base fluids include water, organic liquids (e.g. ethylene, tri-ethylene-glycols, refrigerants, etc.), oils and lubricants, bio-fluids, polymeric solutions and other common liquids. Materials commonly used as nanoparticles include chemically stable metals (e.g. gold, copper), metal oxides (e.g., alumina, silica, zirconia, titania), oxide ceramics (e.g. Al2O3, CuO), metal carbides (e.g. SiC), carbon in various forms (e.g., diamond, graphite, carbon nanotubes, fullerene) and functionalized nanoparticles [1-5]. Nanofluids can be prepared by a one-step or a two-step method. In the two-step method in which nanoparticles or nanotubes are first produced as a dry powder [3] and then dispersed into a fluid in a second processing step [39-41]. In view of the synthetic methods developed for the preparation of nanostructure TiO2, a wide variety of approaches including flame synthesis , ultrasonic irradiation, chemical vapor deposition, sol–gel Method. Among them, Compared to other methods, sol-gel route is regarded as a good method to synthesis ultra- fine metallic oxide and has been widely employed for preparing titanium dioxide (TiO2) particles [42, 43]. TiO2 1 2 ISSN: 2278 – 0041 In the present work, Tio2 Nano particles have been synthesized by Sol-gel technique. The Prepared powders were characterized by using XRD, SEM. water nanofluids with different volume concentrations from 1% to 2% were then prepared by dispersing the synthesized Nano particles in deionised water. water nanofluids with different volume concentrations from 1% to 2% were then prepared by dispersing the synthesized Nano particles in deionised water and particles size was found to be ~6nm [5,6]. of various solids and liquids are listed in table 1. Thermal conductivities 235 Scholars Research LibraryPDF Image | TiO2 nano powder and water based nanofluids
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