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Structure and Spectral Properties of CdS/Zeolite Nanocomposites, pp. 101-117 $100.00
Authors:  (Yu.V. Meteleva-Fischer1, F. Roessner, G.F. Novikov1, M.W.E. van den Berg - Institute of Problems of Chemical Physics of RAS, Chernogolovka, Russia and others)
Abstract:
The nanocomposites of CdS/zeolite (where zeolite Hbeta, NH4ZSM-5, HY) were
synthesized by different methods including novel techniques using thiourea complexes.
The first und second coordination spheres of cadmium in cadmium sulfide nanoparticles
were characterized by XANES (K-edge) spectroscopy and X-ray diffraction.
Additionally, UV-Vis reflection spectroscopy was applied.
The arrangement of the cadmium atom in the precursors (salt or complex) was found
to have a dominant influence on structure of the first coordination sphere of Cd in the
CdS/zeolite nanocomposites. At the same time the type of sulfidising agent and geometry
of the zeolite pores have an influence on the second coordination sphere of cadmium,
which appears in a predominantly formation of cubic or hexagonal structure of CdS
particles. It was determined, that alongside with a formation of nanosized semiconductor
particles more bulky agglomerates are formed too. It was also detected that by the
reaction of cadmium sulfate with hydroxyl groups of zeolites the redox reaction takes
place. 


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Structure and Spectral Properties of CdS/Zeolite Nanocomposites, pp. 101-117