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Browsing by Author "Wunderlich, W"

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Al2O3 @ TiO2-A simple sol-gel strategy to the synthesis of low temperature sintered alumina-aluminium titanate composites through a core-shell approach

Jayasankar, M; Ananthakumar, S; Mukundan, P; Wunderlich, W; Warrier, K G K (Elsevier, 2008)

A simple sol-gel based core-shell approach for the synthesis of alumina-aluminium titanate composite is reported. Alumina is the core and titania is the shell. The coating of titania has been performed in aqueous medium ...
An aqueous sol–gel route to synthesize nanosized lanthanadoped titania having an increased anatase phase stability for photocatalytic application

Baiju, K V; Sibu, C P; Rajesh Komban; Krishna Pillai, P; Mukundan, P; Warrier, K G K; Wunderlich, W (Elsevier, 2005)

A novel synthesis method is reported, involving peptisation and doping of lanthana on colloidal sol-gel titania derived from titanyl sulphate, where the anatase phase has a high stability above 800degreesC and a specific ...
Effect of tantalum addition on anatase phase stability and photoactivity of aqueous sol-gel derived mesoporous titania

Baiju, K V; Shajesh, P; Wunderlich, W; Mukundan, P; Kumar, S R; Warrier, K G K (Elsevier, 2007)

The effect of the addition of tantalum to nanocrystalline titania matrix on the photocatalytic activity is presented. The tantalum addition increases the anatase phase stability to above 1000 degrees C by inhibiting the ...
Enhanced photoactivity and anatase thermal stability of silica-alumina mixed oxide additives on sot-gel nanocrystalline titania

Baiju, K V; Periyat, P; Krishna Pillai, P; Mukundan, P; Warrier, K G K; Wunderlich, W (Elsevier, 2007)

Nanocrystalline titania with silica and silica-alumina mixed oxide as additives has been prepared through a sequential approach sot-gel method starting from titanyl sulphate in aqueous medium. The mixed oxide added titania ...
Enhanced photoactivity of neodymium doped mesoporous titania synthesized through aqueous sol-gel method

Baiju, K V; Periyat, P; Wunderlich, W; Krishna Pillai, P; Mukundan, P; Warrier, K G K (Springer, 2007)

Nanosize neodymium doped titania has been prepared by hydrolysis of titanium oxychloride followed by peptisation under acidic condition. The anatase to rutile phase transformation temperature was found to increase by 150 ...
High surface area sol-gel alumina-titania nanocatalyst

Padmaja, P; Warrier, K G K; Padmanabhan, M; Wunderlich, W (Springer, 2009)

Alumina-titania mixed oxide nanocatalysts with molar ratios = 1:0.5, 1:1, 1:2, 1:5 have been synthesized by adopting a hybrid sol-gel route using boehmite sol as the precursor for alumina and titanium isopropoxide as the ...
High-surface-area alumina-silica nanocatalysts prepared by a hybrid sol-gel route using a boehmite precursor

Padmaja, P N; Moothetty, P; Wunderlich, W; Berry, F J; Mortimer, M; Creamer, N J; Warrier, K G K (Wiley -Blackwell, 2010)

High-surface-area alumina-silica mixed oxide (Al(2)O(3):SiO(2)) nanocatalysts have been prepared by a hybrid sol-gel method using boehmite (synthesized from aluminum nitrate) as the source of alumina and tetraethyl ...
Structural aspects and porosity features of nano-size high surface area alumina-silica mixed oxide catalyst generated through hybrid sol-gel route

Padmaja, P; Warrier, K G K; Padmanabhan, M; Wunderlich, W; Berry, F J; Mortimer, M; Creamer, N J (Elsevier, 2006)

Alumina-silica mixed oxide nano-catalyst materials with compositions 83.6wt.% Al2O3-16.4wt.% SiO2 (3Al(2)O(3)center dot lSiO(2)), 71.82wt.% Al2O3-28.18wt.% SiO2 (3Al(2)O(2)center dot 2SiO(2)), 62.84wt.% Al2O3-37.16wt.% ...
Structural aspects and porosity features of nano-size high surface area alumina-silica mixed oxide catalyst generated through hybrid sol-gel route

Padmaja, P; Warrier, K G K; Padmanabhan, M; Wunderlich, W; Berry, F J; Mortimer, M; Creamer, N J (Elsevier, 2006)

Alumina-silica mixed oxide nano-catalyst materials with compositions 83.6wt.% Al2O3-16.4wt.% SiO2 (3Al(2)O(3)center dot lSiO(2)), 71.82wt.% Al2O3-28.18wt.% SiO2 (3Al(2)O(2)center dot 2SiO(2)), 62.84wt.% Al2O3-37.16wt.% ...

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