@article { ISI:000243821700012,
	title = {Structural evolutions of hydrothermally prepared mesostructured MCM-48 silica using differently manufactured amorphous silica powders},
	journal = {Journal of Non-Crystalline Solids},
	volume = {353},
	number = {2},
	year = {2007},
	month = {FEB},
	pages = {194-199},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>The hydrothermal synthesis of Si-MCM-48 mesoporous molecular sieves was carried out using a ternary SiO2:CTAOH:H2O System wherein differently manufactured amorphous silica powders such as fumed silica (FMDS), spray dried precipitated silica (SDPS) and flash dried precipitated silica (FDPS) were used as silica source materials. The changes in structural/textural properties were evaluated using powder XRD, N-2 adsorption-desorption and scanning electron microscopy techniques. Studies on the progressive development of MCM-48 mesophases revealed that, the reactivity of the silica source follow the trend: FMDS \&gt; SDPS \&gt; FDPS. MCM-48 synthesized using low cost FDPS has exhibited thicker pore walls but poorer orderness, while MCM-48 prepared from relatively expensive FMDS has thinner pore walls and more ordered structure. Moreover, the extent of contraction caused by calcinations, agglomerate size and structural stability were found to depend on the reactivity of the silica source used. (c) 2006 Elsevier B.V. All rights reserved.</p>},
	keywords = {long-range order, micelles, scanning electron microscopy, silica, silicates, sol-gels (xerogels), X-ray diffraction},
	issn = {0022-3093},
	doi = {10.1016/j.jnoncrysol.2006.10.005},
	author = {Taralkar, U. S. and Jha, Ratnesh Kumar and Joshi, P. N.}
}
@article { ISI:000320929200041,
	title = {Pd ultra-small clusters as precursors for silica-encapsulated Pd nanoreactors: highly sinter-resistant catalysts},
	journal = {Chemcatchem},
	volume = {5},
	number = {7},
	year = {2013},
	month = {JUL},
	pages = {1911-1916},
	publisher = {WILEY-V C H VERLAG GMBH},
	address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY},
	abstract = {<p>Sintering and consequent deactivation in supported metal catalysts is a severe problem encountered in heterogeneous catalysis. This problem can be addressed by encapsulating active metal nanoparticles within inert oxides such as silica, provided the oxide shell is porous to enable access of reactant molecules to the nanoparticle surface to facilitate catalysis. We report the synthesis of highly sinter-resistant silica-encapsulated Pd catalysts with nanoparticle sizes stabilized at (3.4 +/- 0.6)nm at high temperatures of approximately 750 degrees C. The synthesis was achieved by utilizing thiol-protected ultra-small clusters of Pd as precursors for silica encapsulation. The ultra-small clusters were synthesized by using propyl ammonium functionalised thiols making them water-dispersible and amenable for silica encapsulation. Abundance of organics also aided in creating porosity subsequent to calcination at high temperatures.</p>},
	keywords = {cluster compounds, Encapsulation, nanoreactors, Palladium, silicates},
	issn = {1867-3880},
	doi = {10.1002/cctc.201200908},
	author = {Samanta, Anupam and Devi, R. Nandini}
}
