Comparative studies of structural and surface properties of porous inorganic oxides used in liquid chromatography

Jaroniec, C.P; Jaroniec, Mietek; Kruk, Michał

doi:10.1016/s0021-9673(97)00998-9

Cited by 57 publications

(42 citation statements)

References 32 publications

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“…All the samples exhibited type-IV nitrogen isotherms according to The International Union of Pure and Applied Chemistry (IUPAC) nomenclature, indicating the mesoporosity of the samples [27]. PEG-titania and P3-C1 titania exhibited H1 hysteresis loops, whereas, the hysteresis loops of chitosan-titania and P1-C3 titania were intermediate between H1 and H2 types with the presence of both narrow hysteresis loops with steep and almost parallel adsorption-desorption isotherms [28]. This suggested the presence of narrow pore size distribution and existence of well connected pores.…”

Section: Surface Properties Of the Synthesized Catalystsmentioning

confidence: 99%

Influence of chitosan–PEG binary template on the crystallite characteristics of sol–gel synthesized mesoporous nano-titania photocatalyst

Preethi

Abarna

Rajarajeswari

2014

Applied Surface Science

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a b s t r a c tNano-titania is by far, the most studied material for its photocatalytic application in air and water pollution abatement. In this study, we have demonstrated the advantage offered by using a binary template of PEG and chitosan for the sol-gel synthesis of titania. Nano-titania samples were prepared using PEG, chitosan and the binary combination of these two as templates. XRD showed that all synthesized samples preserved the anatase structure. Titania sample prepared on 1% PEG and 3% chitosan as template (P1-C3 titania) possessed spherical shaped particles with an average particle size of 12.3 nm, a surface area of 82.9 m 2 /g and uniform dispersion. DRS UV-Vis spectra indicated that, P1-C3 titania showed blue shift in its absorption profile due to decrease in particle size. Consistent with the characteristics, the P1-C3 titania exhibited the highest photocatalytic activity for the degradation of 4-chlorophenol under UV irradiation, in comparison with all the synthesized photocatalytic systems and Degussa-P25. The chitosan bio template is believed to offer controlled growth of titania through Lewis base type interaction with Ti metallic centers in TiO 2 . Such controlled growth route will be significant in synthesizing custom-made titania for its advanced applications in catalytic processes.

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Section: Surface Properties Of the Synthesized Catalystsmentioning

confidence: 99%

Influence of chitosan–PEG binary template on the crystallite characteristics of sol–gel synthesized mesoporous nano-titania photocatalyst

Preethi

Abarna

Rajarajeswari

2014

Applied Surface Science

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“…As mentioned earlier, silica gels are the most common support material used for stationary phases in HPLC due to their relatively high specific surface and pore volume, narrow particle size distribution and pore size distribution, and wide available selection of particle size, pore diameter, and surface area [49]. However, their relative thermal and chemical instability limits their further application under extreme pH and high temperature conditions.…”

Section: Metal Oxide Nanoparticle-based Support Materials In Hplcmentioning

confidence: 99%

Applications of nanomaterials in liquid chromatography: Opportunities for separation with high efficiency and selectivity

Zhang

Wang

Liao

et al. 2006

J of Separation Science

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ReviewApplications of nanomaterials in liquid chromatography: Opportunities for separation with high efficiency and selectivity During recent decades, great efforts have been made to improve the chemical stability, selectivity, and separation efficiency of stationary phases in liquid chromatography. Significant progress has been achieved, especially after the introduction of nanomaterials into separation science. This review covers the applications of nanomaterials playing various roles in liquid chromatography. Future possibilities for developing nanomaterial-based stationary phases are also discussed.

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“…Assim como para HPLC, a maioria dos materiais para empacotamento é à base de sílica quimicamente ligada ou sorventes encapsulados, que são largamente avaliados quanto aos tamanhos de poro e à química de ligação envolvida. Outros sorventes à base de óxidos inorgânicos como Alumina, Zircônio ou Titânio são raramente utilizados 40 . Em cromatografia líquida em fase normal, estes sorventes apresentam propriedades contrastantes com a sílica.…”

Section: Colunasunclassified

Cromatografia unificada

Mühlen

Lanças

2004

Quím. Nova

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Comparative studies of structural and surface properties of porous inorganic oxides used in liquid chromatography

Cited by 57 publications

References 32 publications

Influence of chitosan–PEG binary template on the crystallite characteristics of sol–gel synthesized mesoporous nano-titania photocatalyst

Influence of chitosan–PEG binary template on the crystallite characteristics of sol–gel synthesized mesoporous nano-titania photocatalyst

Applications of nanomaterials in liquid chromatography: Opportunities for separation with high efficiency and selectivity

Cromatografia unificada

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