Preparation and characterization of SnO2 nanorods by thermal decomposition of SnC2O4 precursor

Xu, Congkang; Xu, Guoding; Liu, Yingkai; Zhao, Xiaolin; Wang, Guanghou

doi:10.1016/s1359-6462(02)00077-5

Cited by 128 publications

(62 citation statements)

References 28 publications

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“…[1][2][3][4][5][6][7] However, for many applications such as the line light source or dielectric waveguide, the fiber morphology is more favorable. Unfortunately, so far only a few ways, such as thermal decomposition, 8 template and oxidization, 9 laser ablation or vapor-liquid-solid growth, 10 vapor deposition, 11,12 and electrospinning, [13][14][15] have been developed to fabricate SnO 2 nanofibers or ribbons. Their optical and optoelectronic properties have been only barely touched [10][11][12][13] even though such property characterization is indispensable for their optoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Optical bandgap and photoconductance of electrospun tin oxide nanofibers

Wang

Ramos

Santiago-Avilés

2007

Journal of Applied Physics

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Optical and photoconductive properties of transparent SnO 2 nanofibers, made from C 22 H 44 O 4 Sn via electrospinning and metallorganic decomposition, were investigated using Fourier transform infrared and ultraviolet (UV)/visible spectrometry and the two-probe method. Their optical bandgap was determined from their UV absorption edge to be 3.95-4.08 eV. Their conductance responds strongly to UV light for a wavelength of 254 nm: in air its steady-state on-to-off ratios are 1.31-1.56 (rise) and 1.25-1.33 (fall); its 90% rise and fall times are 76-96 and 71-111 s, respectively. In a vacuum of about 10 −4 torr, its on-to-off ratios are higher than 35.6 (rise) and 3.4 (fall), respectively, and its 90% rise and fall times are longer than 3×10 4 s. Keywordsfibres, fourier transform spectra, infrared spectra, nanostructured materials, nanotechnology, nanostructurred materials, optical constants, photoconductivity, pyrolysis, semiconductor growth, semiconductor materials, tin compounds, ultraviolet spectra, visible spectra Optical and photoconductive properties of transparent SnO 2 nanofibers, made from C 22 H 44 O 4 Sn via electrospinning and metallorganic decomposition, were investigated using Fourier transform infrared and ultraviolet ͑UV͒/visible spectrometry and the two-probe method. Their optical bandgap was determined from their UV absorption edge to be 3.95-4.08 eV. Their conductance responds strongly to UV light for a wavelength of 254 nm: in air its steady-state on-to-off ratios are 1.31-1.56 ͑rise͒ and 1.25-1.33 ͑fall͒; its 90% rise and fall times are 76-96 and 71-111 s, respectively. In a vacuum of about 10 −4 torr, its on-to-off ratios are higher than 35.6 ͑rise͒ and 3.4 ͑fall͒, respectively, and its 90% rise and fall times are longer than 3 ϫ 10 4 s.

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Section: Introductionmentioning

confidence: 99%

Optical bandgap and photoconductance of electrospun tin oxide nanofibers

Wang

Ramos

Santiago-Avilés

2007

Journal of Applied Physics

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“…For example, tin oxalate submicrotubes, nanorods, and flowers-like structures can be obtained in the presence or absence of the surfactant. Porous SnO 2 nanostructures can be obtained after calcination tin oxalate precursor at the relatively high temperatures (typically 500℃) in air [24][25][26][27]. Despite these advantages, it is still a great challenge to synthesize tin oxalate nanostructures in high quality in terms of well-defined shape and ease of fabrication.…”

Section: Introductionmentioning

confidence: 99%

Shape-controlled synthesis of porous SnO2 nanostructures via morphology conserved transformation from SnC2O4 precursor approach

Wang

2011

Nano-Micro Lett

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Porous SnO2 nanostructures with controlled shapes were synthesized by a facile morphologically conserved transformation from SnC2O4 precursor approach. Well-defined SnC2O4 nanostructures can be obtained through a solution-based precipitation process at ambient conditions without any surfactant. The formation mechanism of such microstructures was tentatively proposed on the basis of intrinsic crystal structure and the reaction conditions. We found that the morphologies of precursor were well maintained while numerous pores were formed during the annealing process. The combined techniques of X-ray diffraction, nitrogen absorption-desorption, field emission scanning electron microscopy, and (high-resolution) transmission electron microscopy were used to characterize the as-prepared SnO2 products. Moreover, cyclic voltammetry (CV) study shows that the shape of CV presents a current response like roughly rectangular mirror images with respect to the zero-current line without obvious redox peaks, which indicating an ideal capacitive behavior of the SnO2 electrodes. The photoluminescence (PL) spectrum study suggests that the as-obtained porous SnO2 nanostructures might have a large number of defects, vacancies of oxygen, and local lattice disorder at the interface, interior and exterior surfaces.

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“…4) Accordingly, various structural and morphological forms of SnO 2 materials have been fabricated over the past several years, including nanowires, 5-7) nanoribbons, [8][9][10][11] nanorods, [12][13][14] nanodiskettes, 15,16) and mesoporous powders and thin films. [17][18][19] One of the most interesting and urgent challenges in materials science is the fabrication of one-dimensional (1-D) material of different sizes; smaller diameter nanorods can be utilized in the manufacture of nanoscale switching devices, whereas larger diameter rods can be useful for some optical devices and electronic applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SnO₂Microrods by the Thermal Evaporation of Sn Powders

Kong¹,

Kim

2008

Korean. J. Mater. Res.

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The production of tin oxide (SnO 2 ) microrods on iridium (Ir)-coated substrates was achieved through the thermal evaporation of Sn powders in which a sufficiently high O 2 partial pressure was employed. Scanning electron microscopy revealed that the product consisted of microrods with diameters that ranged from 0.9 to 40 µm. X-ray diffraction, high-resolution transmission electron microscopy, and selected area electron diffraction indicated that the microrods were SnO 2 with a rutile structure. As the microrod tips were free of metal particles, it was determined that the growth of SnO 2 microrods via the present route was dominated by a vapor-solid mechanism. The thickening of rod-like structures was related to the utilization of sufficiently high O 2 partial pressure during the synthesis process, whereas low O 2 partial pressure facilitated the production of thin rods.

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Preparation and characterization of SnO2 nanorods by thermal decomposition of SnC2O4 precursor

Cited by 128 publications

References 28 publications

Optical bandgap and photoconductance of electrospun tin oxide nanofibers

Optical bandgap and photoconductance of electrospun tin oxide nanofibers

Shape-controlled synthesis of porous SnO2 nanostructures via morphology conserved transformation from SnC2O4 precursor approach

Synthesis of SnO₂Microrods by the Thermal Evaporation of Sn Powders

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