10.1021/jp800846v.s001
Debraj Chandra
Debraj
Chandra
Nillohit Mukherjee
Nillohit
Mukherjee
Anup Mondal
Anup
Mondal
Asim Bhaumik
Asim
Bhaumik
Design and Synthesis of Nanostructured Porous SnO<sub>2</sub> with High Surface Areas and Their Optical and Dielectric Properties
American Chemical Society
2008
CHN chemical analysis
bulk SnO 2
nanostructured SnO 2 materials
NaBH 4. Mesoporous
transmission electron microscopy image analyses
UV
field emission scanning electron microscopy
Schiff base condensation
Nitrogen physisorption studies show
SnO 2 materials
pore walls
High Surface Areas
supermicroporous tin oxide particles
13 C NMR
N 2 sorption
quantum confinement effect
Nanostructured Porous SnO 2
uniform nanoscale pore size distribution
2008-06-12 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Design_and_Synthesis_of_Nanostructured_Porous_SnO_sub_2_sub_with_High_Surface_Areas_and_Their_Optical_and_Dielectric_Properties/2934073
A new structure-directing agent, hexadecyl-2-pyridinyl-methylamine, L<sub>16</sub>, was prepared through Schiff base condensation between pyridine-2-carboxaldehyde and hexadecylamine followed by reduction of the imine with NaBH<sub>4</sub>. Mesoporous and supermicroporous tin oxide particles with crystalline pore walls were obtained through a low-temperature sol–gel synthesis process by using an anionic surfactant, sodium dodecylsulfate, and hexadecyl-2-pyridinyl-methylamine, respectively, as templates. Powder X-ray diffraction, transmission electron microscopy−energy-dispersive spectrometry, field emission scanning electron microscopy, CHN chemical analysis, N<sub>2</sub> sorption, <sup>1</sup>H and <sup>13</sup>C NMR, high-resolution mass spectrometry, Fourier transform infrared spectroscopy, and UV–vis absorption spectroscopic tools were employed to characterize L<sub>16</sub> and nanostructured SnO<sub>2</sub> materials. X-ray diffraction and transmission electron microscopy image analyses suggested that these porous materials have a wormhole-like disordered arrangement of pores, whereas the pore walls are crystalline. Nitrogen physisorption studies show high specific surface areas up to 555 m<sup>2</sup> g<sup>−1</sup>, and the uniform nanoscale pore size distribution ranged from supermicropore to mesopores for these materials. These SnO<sub>2</sub> materials showed drastic reduction of dielectrics with the induction of porosity vis-à-vis bulk SnO<sub>2</sub>. These unique optical and electrical properties of porous SnO<sub>2</sub> materials over bulk SnO<sub>2</sub> could be attributed to the quantum confinement effect.