@article {79,
	title = {Competitive role of structural properties of titania-silica mixed oxides and a mechanistic study of the photocatalytic degradation of phenol.},
	journal = {Applied Catalysis, B: Environmental},
	volume = {148-149},
	year = {2014},
	note = {CAPLUS AN 2014:264808(Journal; Online Computer File)},
	pages = {394 - 405},
	publisher = {Elsevier B.V.},
	abstract = {TiO2-SiO2 mixed oxide materials were hydrothermally synthesized and the photocatalytic degrdn. of phenol under UV-irradn. was evaluated.  We also demonstrated that varying the co-solvent, modulates the structural properties of the materials.  In particular, the use of non-polar co-solvents such as toluene seemed to increase the crystallinity, surface area, and pore diam. while the crystallite size of titania seemed to change little.  A comprehensive characterization using surface and bulk techniques evidenced the role of porosities, crystallinity, and Ti-O-Si linkages of the mixed oxides as significant factors that contribute to the degrdn. of phenol.  The TiO2-SiO2 mixed oxide material prepd. using only ethanol as the solvent showed 24\% degrdn. of phenol after 120 min of irradn. whereas other mixed oxide materials degraded phenol more efficiently (57\% to 100\%) in the same duration of time.  The higher photocatalytic activities of the mixed oxide materials prepd. using non-polar solvents is attributed to a combination of factors that include higher Apparent Surface Coverages of Ti-O-Si heterolinkages, larger pore sizes, and most importantly higher crystallinities of the titania phase.  Larger pore sizes enabled better transport of reactant mols. and products to and from the active sites (Ti-O-Si heterolinkages) and the higher crystallinities of the titania phase helped in minimizing the electron-hole recombination in these photocatalysts, and thus resulted in high degrdn. efficiencies. [on SciFinder(R)]},
	keywords = {structure titania silica mixed oxide photocatalysis photocatalyst phenol},
	isbn = {0926-3373},
	author = {Rasalingam, Shivatharsiny and Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
@article {103,
	title = {Exploration of the role of anions in the synthesis of Cr containing mesoporous materials at room temperature.},
	journal = {Microporous and Mesoporous Materials},
	volume = {170},
	year = {2013},
	note = {CAPLUS AN 2013:185238(Journal; Online Computer File)},
	pages = {211 - 225},
	publisher = {Elsevier Inc.},
	abstract = {Chromium contg. mesoporous silica materials were synthesized via a modified Stoeber synthesis at room temp.  The chromium ion loading and the effect of counterion in the synthesis were studied.  The mesoporous materials were extensively characterized by powder XRD, N2 physisorption, Atomic Absorption Spectroscopy (AAS), FTIR Spectroscopy (FTIR), Diffuse Reflectance Spectroscopy (DRS UV-visible), hydrogen Temp.-Programmed Redn. (H2-TPR), XPS, and TEM studies.  A transition from Ia3̅d cubic phase to p6mm hexagonal or wormhole phases was noted as more amts. of chromium were incorporated into the siliceous materials.  Chromium species present in the silica matrix include monochromate, polychromate, and chromium oxide (Cr2O3) clusters. [on SciFinder(R)]},
	keywords = {anion chromium mesoporous material room temp},
	isbn = {1387-1811},
	author = {Mahoney, Luther and Wu, Chia-Ming and Kibombo, Harrison S. and Thiruppathi, Eagappanath and Baltrusaitis, Jonas and Rasalingam, Shivatharsiny and Koodali, Ranjit T.}
}
@article {108,
	title = {Influence of Ti-O-Si hetero-linkages in the photocatalytic degradation of Rhodamine B.},
	journal = {Catalysis Communications},
	volume = {31},
	year = {2013},
	note = {CAPLUS AN 2013:15798(Journal; Online Computer File)},
	pages = {66 - 70},
	publisher = {Elsevier B.V.},
	abstract = {The influence of Ti-O-Si hetero-linkages in the degrdn. of Rhodamine B (RhB) dye over TiO2-SiO2 xerogels is exemplified by XPS anal.  The authors demonstrate a relationship between the percentage surface content of Ti-O-Si and the rate of photocatalytic degrdn. of RhB.  The authors detailed surface investigation revealed that the overall degrdn. of RhB is enhanced due to the high surface percentage content of Ti-O-Si species, high crystallinity of titania phase, and its effective dispersion on a high surface area porous silica support. [on SciFinder(R)]},
	keywords = {titania silica xerogel visible light photocatalyst},
	isbn = {1566-7367},
	author = {Rasalingam, Shivatharsiny and Kibombo, Harrison S. and Wu, Chia-Ming and Budhi, Sridhar and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
@article {110,
	title = {Investigation of the role of platinum oxide for the degradation of phenol under simulated solar irradiation.},
	journal = {Applied Catalysis, B: Environmental},
	volume = {136-137},
	year = {2013},
	note = {CAPLUS AN 2013:414160(Journal; Online Computer File)},
	pages = {248 - 259},
	publisher = {Elsevier B.V.},
	abstract = {The authors demonstrate that a desired oxidn. state can be achieved by synthetic colloidal methods and the choice of characterization technique is crucial for detg. the physicochem. properties that influence the photocatalytic activities.  XPS studies showed that PtO2 was realized in this study, and the resultant cryst. PtO2-TiO2 prepd. by subsequent hydrothermal treatment demonstrated activity for phenol degrdn. under simulated solar light irradn.  Preformed platinum based TiO2 ensures control over the oxidn. state and the crystallite size of titania.  The role of Ptox in the form of stable Pt4+ is elucidated as a mild recombination center, whereas the crystallite size of Pt in surfactant free Pt0-TiO2 appears to be the overriding factor for attaining enhanced photocatalytic performance. [on SciFinder(R)]},
	keywords = {platinum oxide titania photocatalyst phenol photodegrdn solar irradn},
	isbn = {0926-3373},
	author = {Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
@article {121,
	title = {Synthesis-dependent oxidation state of platinum on TiO2 and their influences on the solar simulated photocatalytic hydrogen production from water.},
	journal = {Journal of Physical Chemistry C},
	volume = {117},
	year = {2013},
	note = {CAPLUS AN 2013:1198819(Journal; Online Computer File)},
	pages = {16850 - 16862},
	publisher = {American Chemical Society},
	abstract = {Platinized TiO2 photocatalysts of different compns. of Pt0 and PtO2 were prepd. by modifying the synthesis procedures.  The physicochem. properties of the composite materials were characterized by XPS and high-resoln. transmission electron microscopy.  Energy dispersive X-ray spectroscopy measurements confirmed the presence of Pt species existing as PtO2 and/or mixts. of Pt0 and PtO2.  The composite material, Pt-TiO2-2\%H, contained a high amt. of metallic Pt0 and PtO2 in close proximity with TiO2 that promoted an enhanced photocatalytic hydrogen evolution activity under simulated solar light irradn.  Although Pt-TiO2-2\%C and Pt-TiO2-2\%T consisted of similar compns. of PtO2, these oxidized platinum species seem to appear further apart from TiO2 in Pt-TiO2-2\%C than Pt-TiO2-2\%T.  This caused dramatic variation in their optical behaviors such as strong fluorescence quenching and lower photocatalytic hydrogen evolution activity in the former photocatalyst.  A photocatalyst prepd. by the conventional photodeposition method was also prepd., characterized, and its photocatalytic activity assessed.  This work provides an opportunity to understand the role of PtO2 for photocatalytic prodn. of hydrogen from platinized TiO2 composites and the importance of heterojunctions in such photocatalysts for solar energy conversion. [on SciFinder(R)]},
	keywords = {photocatalytic hydrogen prodn platinum oxidn state titania},
	isbn = {1932-7447},
	author = {Parayil, Sreenivasan Koliyat and Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Kindle, Trevor and Mishra, Srujan and Ahrenkiel, S. Phil and Baltrusaitis, Jonas and Dimitrijevic, Nada M. and Rajh, Tijana and Koodali, Ranjit T.}
}
@article {133,
	title = {Enhanced photocatalytic water splitting activity of carbon-modified TiO2 composite materials synthesized by a green synthetic approach.},
	journal = {International Journal of Hydrogen Energy},
	volume = {37},
	year = {2012},
	note = {CAPLUS AN 2012:405985(Journal; Online Computer File)},
	month = {2012///},
	pages = {8257 - 8267},
	publisher = {Elsevier Ltd.},
	abstract = {We report a green and facile approach for the prepn. of carbon-modified (C-modified) TiO2 composite materials by hydrothermal synthesis followed by pyrolytic treatment.  The resultant materials were characterized by powder X-ray diffraction (XRD), nitrogen physisorption studies, Raman spectroscopy, XPS, diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, and transmission electron microscopy (TEM).  The photocatalytic performances of these materials were evaluated by calcg. the amt. of hydrogen evolved from the decompn. of water under solar simulated irradn. conditions.  An improvement was achieved from no H2 evolution at all with the bare TiO2, to an evolution of 0.21 mL g-1 h-1 from a composite material modified with an optimum carbon loading of 3.62\%.  These results suggested that the interaction of carbon with predominantly rutile form of TiO2 can promote shallow trapping of photogenerated electrons in the oxygen vacancies.  This phenomenon consequently enhances the photocatalytic activity by minimizing charge carrier recombination, a characteristic demonstrated by fluorescence quenching of the TiO2 emission. [on SciFinder(R)]},
	keywords = {carbon titanium oxide composite photocatalytic water splitting hydrothermal method},
	isbn = {0360-3199},
	author = {Parayil, Sreenivasan Koliyat and Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
