Photocatalytic activity of SnO2 nanoparticles in methylene blue degradation

Kim, Sung Phil; Choi, Myong Yong; Choi, Hyun Chul

doi:10.1016/j.materresbull.2015.10.024

Cited by 365 publications

(93 citation statements)

References 35 publications

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“…Under UV light irradiation, the electron in the VB of SnO 2 is excited to the CB by leaving a hole in the VB. These electron-hole pairs migrate to the surface of the catalyst and take part in redox reaction with the species present on the surface of the catalyst [37]. The photo-generated take part in the reduction of dissolved oxygen forming superoxide radical anions, O 2 -, yielding hydroperoxy radicals HO 2  on protonation and finally OH  radicals, while the photo-generated holes oxidize the surface hydroxyl group or physisorbed water molecules forming hydroxyl radical, OH  .…”

Section: Photocatalytic Degradation Mechanismmentioning

confidence: 99%

“…The photo-generated take part in the reduction of dissolved oxygen forming superoxide radical anions, O 2 -, yielding hydroperoxy radicals HO 2  on protonation and finally OH  radicals, while the photo-generated holes oxidize the surface hydroxyl group or physisorbed water molecules forming hydroxyl radical, OH  . OH  radicals are a strong oxidizing agent well-known to decompose organic substrates as MB dye [15,37,46]. …”

Section: Photocatalytic Degradation Mechanismmentioning

confidence: 99%

“…Furthermore, to date, many SnO 2 -based coupled semiconductor composite photocatalysts, such as SnO 2 -TiO 2 [23][24][25][26], SnO 2 -ZnO [27][28][29][30][31] or SnO 2 -CuO [32] have been extensively studied for their high photocatalytic activities. But the study about SnO 2 [33][34][35][36][37] is especially less. In addition, the problem of simultaneous formation of Sn 2+ and even Sn 0 , leads to the mixed phases of SnO 2 and SnO or Sn present in the catalyst [38,39].…”

Section: Introductionmentioning

confidence: 99%

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Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

2016

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In the present study, tin oxide (SnO 2 ) nanoparticles were prepared by precipitation method using tin tetrachloride (SnCl 4 ) as precursor and ammonia solution as precipitating agent followed by calcination at 400 ºC for 2 h. As-prepared SnO 2 particles were characterized by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR). The powder XRD results revealed that the SnO 2 nanoparticles had a typical tetragonal rutile (cassiterite) structure and the average crystallite size calculated by using the Debye -Scherrer equation was found to be approximately 5.1 nm. The photocatalytic activity of the as-prepared photocatalysts was investigated by degrading methylene blue (MB) dye. The effect of pH, catalyst loading and initial dye concentration on photocatalytic degradation was investigated. Results showed that the SnO 2 nanoparticles represented excellent photocatalytic activity for the degradation of MB under UV light with 200 min of irradiation time. The results also showed that the pH of solution had a direct influence on the photocatalysis process and basic pH was favorable for the degradation of MB. The effect of pH on photocatalytic activity was explained with the help of zero point charge (pH pzc ). Furthermore, the photocatalysts could be easily recycled without significant change in the catalytic activity.

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Section: Photocatalytic Degradation Mechanismmentioning

confidence: 99%

Section: Photocatalytic Degradation Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

2016

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“…TiO 2 powder as well as thin films coated over glass or tiles are frequently utilized for cleaning air and water . Including TiO 2 , most of the photocatalytic materials respond only under UV light irradiation . The whole solar spectrum barely accompanied with 4% of UV, by part.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] Including TiO 2 , most of the photocatalytic materials respond only under UV light irradiation. [6][7][8] The whole solar spectrum barely accompanied with 4% of UV, by part. Therefore, cleaning with traditional photocatalytic materials under solar light slows down the process.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical growth of BiOCl on SrO‐Bi₂O₃‐B₂O₃ glass‐ceramics for self‐cleaning applications

Singh

Vaish

2018

J Am Ceram Soc

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We have grown hierarchical structure of bismuth oxycloride (BiOCl) on SrO‐Bi2O3‐B2O3 (SBBO) transparent glass‐ceramic. SBBO glass‐ceramics were fabricated via conventional melt‐quenching technique while BiOCl was grown by etching the glass via HCl. Enhanced visible light driven photocatalytic activity and increasing hydrophobic feature were observed on BiOCl grown SBBO than as‐quenched SBBO glass‐ceramics. Contact angle analysis showed maximum contact angle of 130.7° on the surface of most BiOCl grown SBBO glass‐ceramic. Furthermore, under visible light illumination water contact angle decreased from 130.7° to 30.8°. Such photo‐induced hydrophilicity and catalytic performance in translucent glass‐ceramics lead self‐cleaning applications.

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Synthesis and Characterization of the Orthorhombic Sn₃O₄ Polymorph

et al. 2023

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An unexplored tin oxide crystal phase (Sn3O4) was experimentally synthesized via a facile hydrothermal method. After tuning the often‐neglected parameters for the hydrothermal synthesis, namely the degree of filling of the precursor solution and the gas composition in the reactor head space, an unreported X‐ray diffraction pattern was discovered. Through various characterization studies, such as Rietveld analysis, energy dispersive X‐ray spectroscopy, and first‐principles calculations, this novel material was characterized as orthorhombic mixed‐valence tin oxide with the composition SnII2SnIVO4. This orthorhombic tin oxide is a new polymorph of Sn3O4, which differs from the reported conventional monoclinic structure. Computational and experimental analyses showed that orthorhombic Sn3O4 has a smaller band gap (2.0 eV), enabling greater absorption of visible light. This study is expected to improve the accuracy of hydrothermal synthesis and aid the discovery of new oxide materials.

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Photocatalytic activity of SnO2 nanoparticles in methylene blue degradation

Cited by 365 publications

References 35 publications

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

Hierarchical growth of BiOCl on SrO‐Bi₂O₃‐B₂O₃ glass‐ceramics for self‐cleaning applications

Synthesis and Characterization of the Orthorhombic Sn₃O₄ Polymorph

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Photocatalytic activity of SnO2 nanoparticles in methylene blue degradation

Cited by 365 publications

References 35 publications

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

Hierarchical growth of BiOCl on SrO‐Bi2O3‐B2O3 glass‐ceramics for self‐cleaning applications

Synthesis and Characterization of the Orthorhombic Sn3O4 Polymorph

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Hierarchical growth of BiOCl on SrO‐Bi₂O₃‐B₂O₃ glass‐ceramics for self‐cleaning applications

Synthesis and Characterization of the Orthorhombic Sn₃O₄ Polymorph