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Facile Synthesis of Hybridized Mesoporous Au@TiO 2 /SnO 2 as Efficient Photocatalyst and Selective VOC Sensor
Author(s) -
Malik Ritu,
Tomer Vijay K.,
Chaudhary Vandna,
Dahiya Manjeet S.,
Rana Pawan S.,
Nehra S. P.,
Duhan Surender
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600634
Subject(s) - photocatalysis , rhodamine b , materials science , degradation (telecommunications) , acetone , mesoporous material , aqueous solution , nanocomposite , chemical engineering , hydrothermal circulation , specific surface area , catalysis , benzyl alcohol , methanol , pollutant , nanotechnology , chemistry , organic chemistry , engineering , telecommunications , computer science
Abstract Considering the novelty of heterojunction formation in sunlight photocatalysis, dahlia flower resembling Au loaded TiO 2 /SnO 2 nanocomposite was synthesized using facile hydrothermal method to improve the degradation rate of waste water pollutants. The intrinsic high surface area coupled with unique heterojunction formation causes Au@TiO 2 /SnO 2 to exhibit excellent photocatalytic activity towards the degradation of Rhodamine B (RhB) dye under sunlight irradiation. Under the optimized conditions of catalyst dosage (0.3 g/L), dye concentration (100 ppm) and pH (10), 99.2 % of the RhB aqueous solution was degraded in 35 min of illumination time. Moreover, the resulting Au@TiO 2 /SnO 2 nanohybrid unveiled excellent sensing response (43) towards acetone gas (100 ppm) while detecting a variety of common volatile organic compounds (VOCs) including methanol, benzyl alcohol and isopropanol at 220 °C. Thus, the enhanced photocatalytic activity for degrading organic pollutants under sunlight irradiation and excellent sensing properties at relatively lower working temperature, make this porous nanohybrid a promising candidate for environmental monitoring applications.