NOPR Collection:http://nopr.niscpr.res.in/handle/123456789/281992026-10-08T18:00:15Z2026-10-08T18:00:15ZUnusual catalytic activity of iron containing mesoporous materials for synthesis of diphenylmethaneKanchamreddy, Raveendranath ReddyMutyala, SureshKantam, M LakshmiSrinivasu, Pavulurihttp://nopr.niscpr.res.in/handle/123456789/284862014-05-02T18:17:46Z2014-04-01T00:00:00ZTitle: Unusual catalytic activity of iron containing mesoporous materials for synthesis of diphenylmethane
Authors: Kanchamreddy, Raveendranath Reddy; Mutyala, Suresh; Kantam, M Lakshmi; Srinivasu, Pavuluri
Abstract: Mesoporous ferrosilicates with various Si/Fe
mole ratios have been prepared for the Friedel-Crafts alkylation reaction to
synthesize diphenylmethane selectively under solvent-free reaction conditions.
Mesoporous ferrosilicates (PS-1) have high BET specific surface area (<i style="mso-bidi-font-style:normal">ca.</i> 1050 m<sup>2</sup> g<sup>-1</sup>)
and ordered pore structure. The incorporation of iron into the framework of
mesoporous silica is characterized and confirmed by various techniques such as
XRD, N<sub>2</sub>-sorption and FTIR. The nitrogen sorption results show that
the sample with Si/Fe mole ratio of 46 possesses improved textural properties
as compared with 91 and 125 mole ratios. The catalytic activity of PS-1
catalysts has been tested in the Friedel-Crafts alkylation of aromatic compound
for the selective synthesis of diphenylmethane. The results of the alkylation
reaction indicate that the PS-1(46) catalyst shows higher activity as compare
to other mesoporous ferrosilicates prepared under similar experimental
conditions.
Page(s): 576-5792014-04-01T00:00:00ZCatalytic dehydration of 1-phenylethanol over chromia-carbon composite derived from metal organic framework, CrMIL-101Mutyala, SureshKanchamreddy, Raveendranath ReddyJonnalagadda, MadhaviBurri, David RajuRao, Kamaraju Seetha RamaKantam, M LakshmiSrinivasu, Pavulurihttp://nopr.niscpr.res.in/handle/123456789/284852014-04-19T18:17:52Z2014-04-01T00:00:00ZTitle: Catalytic dehydration of 1-phenylethanol over chromia-carbon composite derived from metal organic framework, CrMIL-101
Authors: Mutyala, Suresh; Kanchamreddy, Raveendranath Reddy; Jonnalagadda, Madhavi; Burri, David Raju; Rao, Kamaraju Seetha Rama; Kantam, M Lakshmi; Srinivasu, Pavuluri
Abstract: The synthesis and characterization of a new
composite material containing chromia and carbon using metal organic framework
(Cr-MIL-101) is presented. The dispersion of chromia particles on carbon
material by direct thermal treatment of Cr-MIL-101 containing terephthalate is
also described. The investigation of removal of guest molecules in Cr-MIL-101
leading to the formation of chromia in the temperature range of 373-473 K has
been studied. The catalytic activity of the composite material for dehydration
of 1-phenylethanol is tested as a possible application. The composite catalytic
system can be used up to 10 h without
significant loss of activity.
Page(s): 572-5752014-04-01T00:00:00Z<span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Synthesis and characterization of Pt supported on Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5 </sub>catalysts</span>Kumar, P AnilPadmasri, A HariKumar, S NaveenVenugopal, ASingh, Sooboohttp://nopr.niscpr.res.in/handle/123456789/284842014-04-21T18:20:08Z2014-04-19T12:36:32ZTitle: <span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Synthesis and characterization of Pt supported on Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5 </sub>catalysts</span>
Authors: Kumar, P Anil; Padmasri, A Hari; Kumar, S Naveen; Venugopal, A; Singh, Sooboo
Abstract: Pt supported on iron hydroxyphosphate
catalysts has been synthesized and characterized by various adsorption and
spectroscopic methods. X-ray diffraction patterns of the supported and
unsupported catalysts indicate a very weak diffraction line due to the Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub>
phase. The X-ray photoelectron spectroscopic studies reveal a surface
composition attributed to Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub>
species. The temperature programmed sequential reduction-oxidation-reduction of
1wt.% Pt/Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub> indicates
the absence of H<sub>2</sub> spillover due to Pt on the Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub>
support. The temperature programmed reduction studies also show the
non-reducible behavior of Fe<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>(OH)<sub>5</sub>
phase.
Page(s): 566-5712014-04-19T12:36:32ZSynthesis, characterization and studies on optical properties of indium doped ZnO nanoparticlesSharma, ManuJeevanandam, Phttp://nopr.niscpr.res.in/handle/123456789/284832014-04-23T18:19:08Z2014-04-19T12:35:51ZTitle: Synthesis, characterization and studies on optical properties of indium doped ZnO nanoparticles
Authors: Sharma, Manu; Jeevanandam, P
Abstract: Indium doped zinc oxide hierarchical
nanostructures have been synthesized using a simple aqueous solution based
method. A change in morphology from hierarchical nanostructures in ZnO to
nanorods after doping with indium has been observed. The optical properties of
nanostructures have been investigated using diffuse reflectance and
photoluminescence spectroscopy. The band gap of zinc oxide nanoparticles
changes after the incorporation of indium and a blue shift of band gap is
observed.
Page(s): 561-5652014-04-19T12:35:51Z