Synthesis, characterization and enhanced photoconductivity from a mesoporous titania on dye doping.
New wormhole-like mesoporous TiO(2) material has been synthesized through a convenient sol-gel method in the presence of a Schiff base secondary amine hexadecyl-2-pyrrole-methylamine (HPMA) containing chelating donor sites as template or structure directing agent (SDA). SDA molecules can be easily removed from the composite to generate mesoporosity and upon removal of the SDA molecule, this mesoporous TiO(2) material showed very high surface area (480+/-10 m(2)/g) with an average pore diameter of 2.57+/-0.05 nm. When Rose Bengal dye is entrapped inside the nanopores of this material, it showed a drastic enhancement (ca. 40-folds) in the photoconductivity vis-à-vis mesoporous TiO(2) alone under white light illumination.
Pal
Nabanita
N
Department of Materials Science, Indian Association for the Cultivation of Science, 2A & B Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, West Bengal, India.
Paul
Manidipa
M
Bera
Ashoke
A
Basak
Durga
D
Bhaumik
Asim
A
D008689:Methacrylates / Q000737:chemistry; D015394:Molecular Structure; D010316:Particle Size; D010777:Photochemistry; D016062:Porosity; D012395:Rose Bengal / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D008689:Methacrylates; D012545:Schiff Bases; C009495:titanium dioxide; D012395:Rose Bengal; D014025:Titanium; C032802:hydroxypropyl methacrylate