Effect of solution pH on structural, optical and morphological properties of SnO2 nanoparticles

Habte, Abebe G.; Hone, Fekadu Gashaw; Dejene, F.B.

doi:10.1016/j.physb.2019.411832

Cited by 23 publications

(9 citation statements)

References 42 publications

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“…X-ray diffraction pattern of the prepared samples calcined at 500 °C were shown in Figure 2 . The CTA-28 sample displays the diffraction peaks at (110), (101), (200), (211), (220), (112), and (301) of the tetragonal rutile (SnO 2 –JCPDS–41-1445) crystal structure and space group–P4 2 /mnm, whereas the (111) and (220) planes correspond to the cubic fluorite phase (CeO 2 JCPDS–34-0394) and space group–F m 3 m [ 15 , 16 ]. The miller planes in CTA-55 appear with a slightly higher angle shift upon increasing the Ce content (2θ = 26.62, 28.57, 33.90,47.71, 51.79).…”

Section: Resultsmentioning

confidence: 99%

Assessment of the Synergetic Performance of Nanostructured CeO2-SnO2/Al2O3 Mixed Oxides on Automobile Exhaust Control

et al. 2022

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In order to control diesel exhaust emission, CeO2-SnO2/Al2O3 (CTA) mixed oxides were prepared and coated on perforated stainless steel (SS) filter plates, and the catalytic activities were analyzed in this work. The CeO2-SnO2 (different compositions of Ce/Sn—2:8; 1:1; 8:2) composites and Al2O3 were prepared separately via a co-precipitation approach, and CeO2-SnO2/Al2O3 (CTA) mixed oxides were attained by mechanical mixing of 75 wt% CeO2-SnO2 composites with 25 wt% Al2O3. X-ray diffraction (XRD) and Raman spectroscopy were performed for all three CeO2-SnO2/Al2O3 (CTA) mixed oxides; the CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample confirmed the presence of cubic and tetragonal mixed faces, which enhances the redox nature (catalytic activities). Various characterizations such as high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS), and a scanning electron microscope (SEM) were employed on CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample to investigate the structural, textural, compositional, and morphological properties. The CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample was coated on a perforated stainless steel (SS) filter plate via a simple, cost-effective, and novel method, and an exhaust emission test for various compression ratios (CR), injection pressure (IP), and load (L) was completed using an AVL Digas analyzer. The CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample, with a size of 10.22 nm and a high surface area of about 73 m2 g−1, exhibit appreciable catalytic properties.

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Section: Resultsmentioning

confidence: 99%

Assessment of the Synergetic Performance of Nanostructured CeO2-SnO2/Al2O3 Mixed Oxides on Automobile Exhaust Control

et al. 2022

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“…Efek pelebaran (boardening) pada bidang kristal (110), ukuran partikel kristal dapat diketahui dengan persamaan Scherrer [22] yaitu 56,204 dan 54,936 nm untuk pH 7 dan 9. Dapat dilihat bahwa ukuran kristal yang dihitung dengan persamaan Scherrer menurun seiring dengan adanya peningkatan pH [23].…”

Section: Hasil Dan Diskusiunclassified

“…Tetapi dengan pH yang semakin meningkat, ukurannya cenderung berubah. Distribusi dan ukuran butir bergantung pada tingkat relatif nukleasi dan pertumbuhan proses, serta tingkat aglomerasi [23]. Berbagai bentuk partikel yang diaglomerasi diamati pada pH 7 dan 9.…”

Section: Hasil Dan Diskusiunclassified

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Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

Arini¹,

Lalasari²,

Setiawan³

et al. 2022

JRM

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SnO2 oxide powder was synthesized using the sol-gel method. SnO2 oxide powder was produced using a solution of tin(IV) chloride (SnCl4) and 25% ammonia (NH4(OH)) by annealing the final product for 4 hours at 900 °C. The pH variation was carried out at pH 7 and 9. XRD analysis showed that the structure of SnO2 formed was polycrystalline with a tetragonal crystal structure with crystal planes (110), (101); (200), (111), (210), (211), (220), (002), (310), (112), (301), (202), (321), (400), (222 ), (330) wherein the crystal plane (110) has the predominant structure. The crystal size using the Scherrer formula, varied from 56,204 and 54,936 nm for pH values 7 and 9. The size using HSP analysis, in the (110) plane the values obtained were 561,594 and 543,901Å for pH 7 and 9. The crystal size decreased with increasing pH. Surface morphology was carried out by SEM analysis, obtained grain sizes of 71.5 and 62.32 nm at pH 7 and 9, respectively. The variation in pH mostly affected the size, shape, and morphology of SnO2.

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“…Important applications have been devised based on the remarkable properties presented by various SnO 2 semiconductor materials [ 24 ]. Used as the archetypal tetragonal crystal structure, this material is categorized as an n-type semiconductor with 3.6 eV band gaps [ 25 ]. Research and applications have sought to exploit the characteristic properties of SnO 2 nanomaterials rooted in their singular crystal structure and nano-sized dimensions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Precursor Concentration on the Particle Size, Crystal Size, and Optical Energy Gap of CexSn1−xO2 Nanofabrication

et al. 2021

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In the present work, a thermal treatment technique is applied for the synthesis of CexSn1−xO2 nanoparticles. Using this method has developed understanding of how lower and higher precursor values affect the morphology, structure, and optical properties of CexSn1−xO2 nanoparticles. CexSn1−xO2 nanoparticle synthesis involves a reaction between cerium and tin sources, namely, cerium nitrate hexahydrate and tin (II) chloride dihydrate, respectively, and the capping agent, polyvinylpyrrolidone (PVP). The findings indicate that lower x values yield smaller particle size with a higher energy band gap, while higher x values yield a larger particle size with a smaller energy band gap. Thus, products with lower x values may be suitable for antibacterial activity applications as smaller particles can diffuse through the cell wall faster, while products with higher x values may be suitable for solar cell energy applications as more electrons can be generated at larger particle sizes. The synthesized samples were profiled via a number of methods, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). As revealed by the XRD pattern analysis, the CexSn1−xO2 nanoparticles formed after calcination reflect the cubic fluorite structure and cassiterite-type tetragonal structure of CexSn1−xO2 nanoparticles. Meanwhile, using FT-IR analysis, Ce-O and Sn-O were confirmed as the primary bonds of ready CexSn1−xO2 nanoparticle samples, whilst TEM analysis highlighted that the average particle size was in the range 6−21 nm as the precursor concentration (Ce(NO3)3·6H2O) increased from 0.00 to 1.00. Moreover, the diffuse UV-visible reflectance spectra used to determine the optical band gap based on the Kubelka–Munk equation showed that an increase in x value has caused a decrease in the energy band gap and vice versa.

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Effect of solution pH on structural, optical and morphological properties of SnO2 nanoparticles

Cited by 23 publications

References 42 publications

Assessment of the Synergetic Performance of Nanostructured CeO2-SnO2/Al2O3 Mixed Oxides on Automobile Exhaust Control

Assessment of the Synergetic Performance of Nanostructured CeO2-SnO2/Al2O3 Mixed Oxides on Automobile Exhaust Control

Struktur Kristal Dan Morfologi Permukaan – Sintesis Sno2 Menggunakan Metode Sol-Gel

The Effect of Precursor Concentration on the Particle Size, Crystal Size, and Optical Energy Gap of CexSn1−xO2 Nanofabrication

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