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Browsing by Author "Mukundan, P"

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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 ...
Antiwetting silica-gelatin nanohybrid and transparent nano coatings synthesised through an aqueous sol-gel process

Smitha, S; Shajesh, P; Mukundan, P; Warrier, K G K (Springer, 2007)

Hydrophobic silica-biopolymer hybrid has been synthesised using colloidal silica as the precursor for silica, gelatin as the biopolymer counterpart and vinyltrimethoxysilane as the surface modifier through a sol-gel method. ...
Aqueous colloidal sol-gel route to synthesize nanosized ceria-doped titania having high surface area and increased anatase phase stability

Pradeepan, P; Baiju, K V; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Springer, 2007)

Nanocrystalline sol-gel derived titania doped with ceria (1, 2, 5 and 10-mole%) has been prepared from titanyl oxysulphate. The titania doped with 5-mole% CeO2 after calcining to 500 degrees C, possesses specific surface ...
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 ...
Direct synthesis of varistor-grade doped nanocrystalline ZnO and its densification through a step-sintering technique

Anas, S; Mangalaraja, R V; Mukundan, P; Shukla, S K; Ananthakumar, S (Elsevier, 2007)

A direct synthesis of varistor-grade doped ZnO powder was attempted by simple hydrolysis followed by low-temperature refluxing (80 °C) in aqueous and alcoholic media. Rod like, one-dimensional nanocrystalline doped ZnO ...
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 ...
Environmentally benign sol-gel derived nanocrystalline rod shaped calcium doped cerium phosphate yellow-green pigment

Sumaletha, N; Rajesh Komban; Mukundan, P; Warrier, K G K (Springer, 2009)

Nanocrystalline rod shaped calcium doped cerium phosphate yellow-green pigment particles having an average length of similar to 100 nm and aspect ratio 10 even after calcination at 600 degrees C have been realized through ...
A facile sol-gel strategy for the synthesis of rod-shaped, nanocrystalline, high-surface-area lanthanum phosphate powders and nanocoatings

Rajesh Komban; Shajesh, P; Seidel, O; Mukundan, P; Warrier, K G K (Wiley, 2007)

Synthesis of rod-shaped nanocrystalline lanthanum phosphate with an average length of 40 nm even after calcination at 400 degrees C has been realized through a room- temperature aqueous sol-gel process. The sol is characterized ...
Low temperature needle like mullite grain formation in sol-gel precursors coated on SiC porous substrates

Jayasankar, M; Anilkumar, G M; Smitha, V S; Mukundan, P; Madhusoodana, C D; Warrier, K G K (Elsevier, 2011)

Dense mullite coating having thickness in the range of 3 to 5 mu m was produced from sol-gel mullite precursor coated on SIC porous substrates at heat treatment temperatures as low as 1300 degrees C. Mullite formed in the ...
Low temperature synthesis of aluminium titanate by an aqueous sol-gel route

Jayasankar, M; Ananthakumar, S; Mukundan, P; Warrier, K G K (Elsevier, 2007)

Formation of aluminium titanate (AT) has been achieved at low temperature through sol-gel process using boehmite and titanium hydroxide as precursors by controlling the particle size at nanoscale followed by in-situ ...
Low-temperature fine-grained alumina-aluminum titanate composites produced from a titania-coated alumina precursor

Mani, J; Ananthakumar, S; Mukundan, P; Warrier, K G K (Wiley, 2007)

A method for the preparation of alumina-aluminum titanate (AT) composites, which can be sintered to high density with a fine-grained microstructure at < 1450 degrees C, is reported. The composite precursor is alumina ...
Mesoporous silica-alumina aerogels with high thermal pore stability through hybrid sol-gel route followed by subcritical drying

Aravind, P R; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Elsevier, 2006)

Silica-alumina mixed oxide aerogels have been synthesised for the first time by subcritical method, having compositions of 5, 10, 15, 20 and 25 wt.% of alumina in silica through a hybrid sol-gel technique. Boehmite was ...
Non-supercritically dried silica-silica composite aerogel and its possible application for confining simulated nuclear wastes

Aravind, P R; Shajesh, P; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Springer, 2008)

The simpler non-supercritical drying approach has been used for the first time for the preparation of silica-silica composite aerogels (CA) and the efficiency of the process being demonstrated by testing the use of the ...
Nonsupercritically dried silica-alumina aerogels - Effect of gelation pH

Aravind, P R; Shajesh, P; Smitha, S; Mukundan, P; Warrier, K G K (Wiley, 2008)

Silica-alumina mixed oxide aerogels, with 5, 10, 15, 20, and 25 wt% of alumina in silica, have been synthesized by a hybrid sol-gel technique followed by subcritical drying. The gelation has been carried out under pH values ...
Silica alcogels for possible nuclear waste confinement - A simulated study

Aravind, P R; Sithara, L; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Elsevier, 2007)

A new method for possible incorporation of nuclear wastes has been attempted here by using silica alcogels as a host precursor for confinement. The large pore volume of the silica alcogel is used as a sponge to incorporate ...
Silica-gelatin bio-hybrid and transparent nano-coatings through sol-gel technique

Smitha, S; Mukundan, P; Krishna Pillai, P; Warrier, K G K (Elsevier, 2007)

Silica-gelatin nano-hybrid composites are reported where the synthesis has been done through hydrolysis of tetraethoxysilane (TEOS) in presence of gelatin solution. Chemical interaction between silica and gelatin, gelation ...
Silica–titania aerogel monoliths with large pore volume and surface area by ambient pressure drying

Aravind, P R; Shajesh, P; Mukundan, P; Warrier, K G K (Springer, 2009)

Ambient pressure drying has been carried out for the synthesis of silica-titania aerogel monoliths. The prepared aerogels show densities in the range 0.34-0.38 g/cm(3). The surface area and pore volume of these mixed oxide ...
Synthesis of biocompatible hydrophobic silica–gelatin nano-hybrid by sol–gel process

Smitha, S; Shajesh, P; Mukundan, P; Nair, T D R; Warrier, K G K (Elsevier, 2007)

Silica–biopolymer hybrid has been synthesised using colloidal silica as the precursor for silica and gelatin as the biopolymer counterpart. The surface modification of the hybrid material has been done with methyltrimethoxysilane ...

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