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Synthesis of Mesoporous SnO 2 Spheres and Application in Gas Sensors
Author(s) -
Wang Xinzhen,
Qiu Song,
Liu Jiurong,
He Cuizhu,
Lu Guixia,
Liu Wei
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301212
Subject(s) - mesoporous material , tin oxide , chemistry , chemical engineering , annealing (glass) , spheres , tin dioxide , tin , nanotechnology , nanoparticle , pulmonary surfactant , oxide , materials science , catalysis , organic chemistry , composite material , biochemistry , physics , astronomy , engineering
Mesoporous tin oxide (SnO 2 ) spheres with a size of 500–700 nm have been successfully synthesized through annealing a tin hydroxide precursor was obtained by a one‐pot solvothermal process from a methanol system containing the surfactant polyvinyl pyrrolidone (PVP). Experimental studies revealed that polyvinyl pyrrolidone plays a pivotal role in controlling the size and agglomeration of mesoporous spheres. The mesoporous SnO 2 spheres with a surface area of 78.2 m 2 g –1 and an average pore size of ca. 10 nm are monodispersed and the mesoporous structure can be maintained even after annealing at 500 °C for 2 h in air. Gas sensing tests showed that the SnO 2 mesoporous spheres exhibit high sensitivity to H 2 , enhanced response to CO and also fast response and recovery rates, suggesting potential application as an advanced gas sensing material.