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Synthesis of Mesostructured Nickel Oxide with Silica Xinghua Liu,

Summary: Synthesis of Mesostructured Nickel Oxide with Silica
Xinghua Liu,
C.-M. Chun,
Ilhan A. Aksay,
and Wei-Heng Shih*,
Department of Materials Engineering, Drexel University, Philadelphia, Pennsylvania 19104, and Department
of Chemical Engineering and Princeton Materials Institute, Princeton University,
Princeton, New Jersey 08544-5263
Mesostructured nickel oxide was formed with nickel sulfate and cationic surfactant cetyltrim-
ethylammonium bromide (CTAB). X-ray diffraction (XRD) peaks at low scattering angles and
transmission electron microscopy (TEM) indicated that a mesostructure was formed. However,
these XRD patterns disappeared after calcination. The addition of sodium silicate in the precursor
solutions produced a mesostructure, which is stable against calcination. Surface areas as high
as 530 m2
/g can be obtained for the nickel silicate mesophase. TEM-EDXS showed that the Si/
Ni molar ratio in the mesophase is 0.5, independent of the initial Si/Ni ratio in the precursor.
Mesoporous silica, which was discovered by research-
ers at Mobil,1 contains periodic pore structures with
uniform pore sizes ranging from 20 to 100 . The larger


Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University


Collections: Materials Science