Solvothermal Synthesis

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Arumugam Manthiram - One of the best experts on this subject based on the ideXlab platform.

Vadivel A Murugan - One of the best experts on this subject based on the ideXlab platform.

T. Muraliganth - One of the best experts on this subject based on the ideXlab platform.

Yan Xiang Wang - One of the best experts on this subject based on the ideXlab platform.

  • Preparation of TiO2 Nanopowders by Solvothermal Synthesis
    Advanced Materials Research, 2011
    Co-Authors: Yan Xiang Wang, Xiao Yan Li
    Abstract:

    TiO2 nanopowders were synthesized by Solvothermal Synthesis method. Effects of different solvents and dodecylbenzenesulfonic acid sodium on the properties of TiO2 nanopowders were investigated. The formation mechanism of TiO2 microflowers was discussed. The results showed that with the increasing of carbon chain of alcohol, the diameter of TiO2 nanopowders increased. Flowers-like TiO2 nanostructures were produced with 0.115M SDBS. Flowers-like TiO2 nanostructures were composed of TiO2 cuboid nanorods, and the length, width and thickness of cuboid nanorods were 1 ~ 2 μm, 100nm and 100nm, respectively.

  • Preparation of TiO2 Nanopowders by Non-Hydrolytic Sol−Gel and Solvothermal Synthesis
    Applied Mechanics and Materials, 2011
    Co-Authors: Yan Xiang Wang, Min Xu
    Abstract:

    TiO2 nanopowders were synthesized by non-hydrolytic sol−gel Synthesis and Solvothermal method. Effects of the type of alcohol on the properties of TiO2 nanopowders were investigated. XRD and FSEM were used to characterize TiO2 nanopowders. The results showed that TiO2 nanopowders with diameters of about 50nm and micro-spheres with diameters of about 400~500nm were obtained by non-hydrolytic sol−gel Synthesis, when ethanol and isopropanol were used as oxygen donor and solvent, respectively. TiO2 prepared with ethanol by non-hydrolytic sol−gel Synthesis and calcined at 700°C consisted only 3.8% rutile phase. After Solvothermal Synthesis, TiO2 nanopowders with diameters of about 50nm were obtained when ethanol and isopropanol were used as the oxygen donor. However, submicrometer spheres with uniform size distribution were obtained with 1-octanol.

  • Effect of the Type of Alcohol on the Properties of ZnO Nanopowders Prepared with Solvothermal Synthesis
    Materials Science Forum, 2010
    Co-Authors: Yan Xiang Wang, Xi Yu
    Abstract:

    ZnO nanopowders were prepared via Solvothermal Synthesis by using methanol, ethanol, isopropanol, n-butanol, n-hexanol and 1-octanol as the reaction medium. Effects of alcohol on the properties of the ZnO nanopowders were investigated. XRD, FSEM and UV-visible absorption spectroscopy were used to characterize ZnO nanopowders. The results show that: the type of alcohol had significantly effect on the morphology of ZnO nanopowders. ZnO nanoparticles with diameter ~100 nm were obtained by using ethanol and isopropanol as reaction solvent. ZnO nanorods were obtained with the n-butanol, n-hexanol and 1-octanol as reaction solvent, and the grain size distribution broadened with the increasing of carbon chain of alcohol. The effect mechanism of alcohol was also discussed in detail.

Stephanie L. Brock - One of the best experts on this subject based on the ideXlab platform.

  • Solvothermal Synthesis of Tetrahedrite: Speeding Up the Process of Thermoelectric Material Generation
    ACS Applied Materials and Interfaces, 2015
    Co-Authors: Derak J. James, Donald T. Morelli, Xu Lu, Stephanie L. Brock
    Abstract:

    Derivatives of synthetic tetrahedrite, Cu12Sb4S13, are receiving increasing attention in the thermoelectric community due to their exploitation of plentiful, relatively nontoxic elements, combined with a thermoelectric performance that rivals that of PbTe-based compounds. However, traditional synthetic methods require weeks of annealing at high temperatures (450-600 degrees C) and periodic regrinding of the samples. Here we report a Solvothermal method to produce tetrahedrite that requires only 1 day of heating at a relatively low temperature (155 degrees C). This allows preparation of multiple samples at once and is potentially scalable. The Solvothermal material described herein demonstrates a dimensionless figure of merit (ZT) vs temperature curve comparable to that of solid-state tetrahedrite, achieving the same ZT of 0.63 at similar to 720 K. As with the materials from solid-state Synthesis, products from this rapid Solvothermal Synthesis can be improved by miming in a 1:1 molar ratio with the Zn-containing natural mineral, tennantite, to achieve 0.9 mol equiv of Zn. This leads to a 36% increase in ZT at similar to 720 K for Solvothermal tetrahedrite, to 0.85.