@conference { ISI:000291657600253,
	title = {Immobilization of Ntn hydrolases on APTES fuctionalized SBA-15},
	booktitle = {From Zeolites to Porous Mof Materials: the 40th Anniversary of International Zeolite Conference, Proceedings of the 15th International Zeolite Conference},
	series = {Studies in Surface Science and Catalysis},
	volume = {170},
	year = {2007},
	note = {15th International Zeolite Conference, Beijing, PEOPLES R CHINA, AUG 12-17, 2007},
	month = {AUG},
	pages = {1891-1898},
	publisher = {Elsevier Science BV},
	organization = {Elsevier Science BV},
	address = {Sara Burgerhartstraat 25, Po Box 211, 1000 AE Amsterdam, Netherlands},
	abstract = {<p>APTES Functionalized mesoporous silica SBA-15 molecular sieves have been prepared and used for immobilization of Penicillin G acylase. Physico chemical characterization was done by nitrogen adsorption, powder XRD and TEM methods to understand the nature of immobilized PGA enzyme. XRD data indicate a good mesoscopic order. The characteristic hexagonal features of SBA-15 were maintained in PGA immobilized SBA-15 samples. Incorporation of PGA does not affect the original pore structure of the parent SBA-15. The adsorption of PGA on SBA-15 from buffered solutions with a pH value, 7.8 has been studied as a model protein adsorption system. The maximum activity of the immobilized enzyme was observed at pH 7.8, slightly below the isoelectric point of the enzyme. The loading capacity of immobilized PGA is 34 mg protein per 0.5 g of SBA-15. The stability of Penicillin G acylase was enhanced by the physical entrapment in SBA-15.</p>},
	isbn = {978-0-444-53068-4},
	issn = {0167-2991},
	author = {Shah, Pallavi and Sridevi, N. and Prabhune, Asmita and Ramaswamy, Veda},
	editor = {Xu, R and Gao, Z. and Chen, J and Yan, W}
}
@article { ISI:000264897200035,
	title = {Interfacial and physico-chemical properties of polymer-supported CdS center dot ZnS nanocomposites and their role in the visible-light mediated photocatalytic splitting of water},
	journal = {Journal of Colloid and Interface Science},
	volume = {333},
	number = {1},
	year = {2009},
	month = {MAY},
	pages = {263-268},
	publisher = {ACADEMIC PRESS INC ELSEVIER SCIENCE},
	address = {525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA},
	abstract = {<p>Nano-composite CdS center dot ZnS moieties coated over polyester strip were found to exhibit better visible-light-mediated photo-activity for splitting of water, as compared to corresponding pure CdS or ZnS containing coupons. This increase in activity depended upon the mol ratio of the two component sulphides in a particular sample. HRTEM experiments revealed the presence of 1-3 nm size CdS particles embedded over larger size ZnS clusters, the composite samples thus functioning as a highly dispersed guest-host system. In the case of CdS and ZnS dispersed individually over polyester, average crystallite size was found to be around 5 and 15 rim, respectively. A blue shift was observed in the UV-vis absorption spectrum of US oil addition of ZnS, in conformation with the quantum size effects. Powder XRD, electron diffraction and XPS Studies showed that the nanocomposites were comprised of the face-centered cubic (alpha) phases of both US and ZnS in a close contact with each other. At the same time, certain solid solution phases, i.e. Cd(1-x)Zn(x)S. were generated at the interfaces of these two semiconductors. Our Study demonstrates that the increase in the number of reaction sites due to smaller size of US particles and the micro-structural properties associated with the nanostructured US or CdS/ZnS interfaces may together play a vital role in the augmented catalytic activity of CdS center dot ZnS composite photocatalysts. (c) 2009 Elsevier Inc. All rights reserved.</p>},
	keywords = {CdS center dot ZnS nanocomposites, Photocatalytic activity, Role of microstructural properties, Splitting of water},
	issn = {0021-9797},
	doi = {10.1016/j.jcis.2009.01.037},
	author = {Deshpande, Aparna and Shah, Pallavi and Gholap, Ramkrishna S. and Gupta, Narendra M.}
}
