TITLE

The thermodynamic properties of hydrated γ-Al2O3 nanoparticles

AUTHOR(S)
Spencer, Elinor C.; Huang, Baiyu; Parker, Stewart F.; Kolesnikov, Alexander I.; Ross, Nancy L.; Woodfield, Brian F.
PUB. DATE
December 2013
SOURCE
Journal of Chemical Physics;Dec2013, Vol. 139 Issue 24, p244705
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this paper we report a combined calorimetric and inelastic neutron scattering (INS) study of hydrated γ-Al2O3 (γ-alumina) nanoparticles. These complementary techniques have enabled a comprehensive evaluation of the thermodynamic properties of this technological and industrially important metal oxide to be achieved. The isobaric heat capacity (Cp) data presented herein provide further critical insights into the much-debated chemical composition of γ-alumina nanoparticles. Furthermore, the isochoric heat capacity (Cv) of the surface water, which is so essential to the stability of all metal-oxides at the nanoscale, has been extracted from the high-resolution INS data and differs significantly from that of ice-Ih due to the dominating influence of strong surface-water interactions. This study also encompassed the analysis of four γ-alumina samples with differing pore diameters [4.5 (1), 13.8 (2), 17.9 (3), and 27.2 nm (4)], and the results obtained allow us to unambiguously conclude that the water content and pore size have no influence on the thermodynamic behaviour of hydrated γ-alumina nanoparticles.
ACCESSION #
93390677

 

Related Articles

  • Excitation of Δ and N* resonances in isobaric charge-exchange reactions of heavy nuclei. Vidaña, I.; Benlliure, J.; Geissel, H.; Lenske, H.; Scheidenberger, C.; Vargas, J. // EPJ Web of Conferences;2016, Vol. 107, p10003-p.1 

    We present a model for the study of the excitation of Δ(1232) and N*(1440) resonances in isobaric charge-exchange (AZ, A(Z ± 1)) reactions of heavy nuclei. Quasi-elastic and inelastic elementary processes contributing to the double differential cross sections of the reactions are...

  • Effect of Pore Size and Film Thickness on Gold-Coated Nanoporous Anodic Aluminum Oxide Substrates for Surface-Enhanced Raman Scattering Sensor. Kassu, Aschalew; Farley III, Carlton; Sharma, Anup; Wonkyu Kim; Junpeng Guo // Sensors (14248220);Dec2015, Vol. 15 Issue 12, p29924 

    A sensitive surface enhanced Raman scattering chemical sensor is demonstrated by using inexpensive gold-coated nanoporous anodic aluminum oxide substrates. To optimize the performance of the substrates for sensing by the Surface-enhanced Raman scattering (SERS) technique, the size of the...

  • Method of Measurement Isobaric Heat Capacity of the Organic Liquid. Neruchev, Yu. A.; Korotkovskiy, V. I. // Journal of Nano- & Electronic Physics;2013, Vol. 5 Issue 4, p04034-1 

    A technique for measuring the heat capacity of liquids on modernized authors the installation of IT-Cp-400 is considered. The results of measurements the isobaric heat capacity of some bromosubstituted n-alkanes is presented.

  • Measurements of the isobaric heat capacity of pressurized liquid trans-1,3,3,3-tetrafluoropropene [R1234ze(E)] by scanning calorimetry. Gao, Neng; Chen, Guangming; Li, Rong; Wang, Yi; He, Yijian; Yang, Bo // Journal of Thermal Analysis & Calorimetry;Dec2015, Vol. 122 Issue 3, p1469 

    Isobaric heat capacity of pressurized liquid trans-1,3,3,3-tetrafluoropropene [R1234ze(E)] was measured by scanning calorimetry. The experimental system basically consists of a Calvet calorimeter (Setaram C80) and a pressure balance unit. A total of 95 data points were obtained at temperatures...

  • Heat Capacity and Thermodynamic Functions of Complex Manganites and Ferrites in Temperature Range 298.15 - 673K. Mataev, M. M.; Myrzahmetova, N. O.; Nuketaeva, D. Zh.; Zhumanova, N. A.; Kuanysheva, Zh. K.; Nurbekova, M. A.; Abdraimova, M. R. // Middle East Journal of Scientific Research;2013, Vol. 14 Issue 1, p05 

    The isobaric heat capacities of polycrystalline manganites BiBαMn2O5,5, and ferrites BiSrFe2O5,5, BiCαMn2O5,5M were experimentally studied by dynamic calorimetry in the temperature range 298,15 - 673 K. Mathematical treatment of experimental data derived to polynomial equations of...

  • High-precision thermal conductivity measurements as a probe of polymer/nanoparticle interfaces. Putnam, Shawn A.; Cahill, David G.; Ash, Beniamin J.; Schadler, Linda S. // Journal of Applied Physics;11/15/2003, Vol. 94 Issue 10, p6785 

    We use the 3ω method to study the thermal conductivity of composites of nanoscale alumina particles in polymethylmethacrylate (PMMA) matrices. Effective medium theory and data for the changes in conductivity produced by low volume fractions of particle fillers are used to estimate the...

  • Self-assembled block copolymer membranes: From basic research to large-scale manufacturing. Nunes, Suzana P.; Behzad, Ali Reza; Peinemann, Klaus-Viktor // Journal of Materials Research;Oct2013, Vol. 28 Issue 19, p2661 

    Order and porosity of block copolymer membranes have been controlled by solution thermodynamics, self-assembly, and macrophase separation. We have demonstrated how the film manufacture with long-range order can be up-scaled with the use of conventional membrane production technology.

  • CELL PHYSIOLOGY AND ELECTROLYTES.  // Nephrology Dialysis Transplantation;May2014, Vol. 29 Issue suppl_3, piii69 

    No abstract available.

  • On the Occurrence of Anhydrite in the Sulphatic Claystones of the Gypsum Keuper. Anagnostou, G.; Serafeimidis, K.; Vrakas, A. // Rock Mechanics & Rock Engineering;Jan2015, Vol. 48 Issue 1, p1 

    We investigate why the sulphatic claystones of the Gypsum Keuper contain anhydrite rather than gypsum even at small depths of cover. This question is relevant due to the phenomenon of swelling of anhydritic claystones, which is attributed to the transformation of anhydrite into gypsum and has...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics