Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Al-Hamdi, A.; Sillanpää, Mika; Dutta, Joydeep

doi:10.1016/j.jallcom.2014.08.120

Cited by 74 publications

(16 citation statements)

References 41 publications

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“…The 2-Propanol is also known as isopropanol, and has a neutral pH level of approximately 7 (as we obtained from our previous analysis, result not shown) [47], almost similar to pure water. It seems that propionic acid competes with acetic acid, a reason why we are getting traces of this compound sometimes before acetic acid, and at other occasions, after acetic acid.…”

Section: Iso-propanolsupporting

confidence: 73%

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Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

2015

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Lanthanum (La)-doped tin dioxide (SnO 2 ) nanoparticles were synthesized by a modified sol-gel method at room temperature. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The photocatalytic activity of La:SnO 2 samples were investigated by studying the degradation profile of phenol and its by-products in water. The treated samples were analyzed by HPLC-UV and a UV-Vis spectrophotometer. Benzoquinone, catechol, resorcinol, hydroquinone, acetic acid, and 2-propanol were identified as phenol degradation intermediates. Maximum concentration acquired was in the order of catechol, resorcinol, hydroquinone, and benzoquinone, which was observed in the beginning stages while iso-propanol and acetic acid were observed in the final stages of phenol degradation. We achieved a complete photodegradation of a 10 ppm aqueous phenol solution and intermediates with 0.6 % of SnO 2 :La nanoparticles in 120 min under artificial solar irradiation. A maximum degradation rate constant of 0.02228 min -1 of propanol and a minimum of acetic acid 0.013412 min -1 were recorded at 37°C.

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Section: Iso-propanolsupporting

confidence: 73%

“…Ring opening of the by-products lead to the formation of acetic acid; pH also increases (results not shown) [47]. Acetic acid appeared in the reaction medium after 45 min at a rate of 0.0015 ppm/min.…”

Section: Acetic Acidmentioning

confidence: 85%

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

2015

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“…[2] Titanium dioxide (TiO 2 ) is the largest employed photocatalyst agent and is often used as the benchmark semiconductor in most research studies. [6][7][8][9][10][11] Other oxides including tin oxide (SnO 2 ), [12,13] iron oxide (Fe 2 O 3 ) [14,15] and tungsten oxide (WO 3 ), [16] have also been subject to significant research in this field. Even so, one of the most important semiconductors for the removal and full mineralization of environmental pollutants, right next to TiO 2 , is zinc oxide (ZnO).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Laser‐Processed ZnO Micro/Nanocrystals

Rodrigues

Pimentel

Fortunato

et al. 2018

Physica Status Solidi (a)

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With a bandgap energy of ≈3.3 eV at room temperature, zinc oxide (ZnO) exhibits physical properties that make it a potential candidate for several technological applications. Sustainable development requires, among other actions, removal of organic pollutants by employing non‐toxic structures, which can be achieved considering the photocatalytic properties of ZnO. In this work, high optical and structural quality ZnO crystals with distinct morphologies (nanotetrapods and microrods) are produced by laser‐processing. By adding silver to the growth precursors it is possible to produce ZnO/Ag composites in a single and short step, boosting a synergetic conjugation of the properties of both materials. The ZnO structures produced with and without silver are fully characterized by electronic microscopy and optical spectroscopy. Moreover, their photocatalytic activity is analyzed using methylene blue as a model‐test contaminant, revealing that the nanotetrapods exhibit a better performance than the microrods. This effect is further enhanced by the presence of silver on the ZnO surface, hindering the photoinduced carriers’ recombination, as corroborated by the photoluminescence results.

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“…The apparent red‐shift of 100 nm in the absorption edge of chrysotile/SnO 2 nanocomposite relative to that of chrysotile (3.938 ev, Figure D) can be observed, which may be attributed to the deposition of SnO 2 on chrysotile surfaces. According to the relationship between plot of [ F (RN) h ν] 1/2 versus hν (where R is the reflectance coefficient, h is Planck's constant, and ν represents light frequency, the band gap can be calculated for these three materials. As shown in Figure B‐D, chrysotile, SnO 2 and chrysotile/SnO 2 possess a band gap of 3.938, 3.580 and 2.897 eV, severally, suggesting that the combination with chrysotile could effectively reduce the band gap.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis and characterization of Chrysotile/SnO₂ nanocomposite for enhanced photocatalytic properties

Luo

Peng

Tian

et al. 2020

Applied Organom Chemis

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SnO2 nanocrystals grown on chrysotile surfaces could be facilely synthesized in large quantities through a direct precipitation process coupled with a calcination treatment. The as‐synthesized chrysotile/SnO2 nanocomposites showed a smaller band gap energy (2.88 ev) and relatively strong light absorption than the individually dispersed SnO2 nanocrystals. Due to the narrow gap and chemical passivation aroused by inherently negative charges on the surface of chrysotile, chrysotile/SnO2 nanocomposite was endowed with superior performance to chrysotile nanotube and SnO2 nanocrystals.

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Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Cited by 74 publications

References 41 publications

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

Photocatalytic Activity of Laser‐Processed ZnO Micro/Nanocrystals

Facile synthesis and characterization of Chrysotile/SnO₂ nanocomposite for enhanced photocatalytic properties

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Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Cited by 74 publications

References 41 publications

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles

Photocatalytic Activity of Laser‐Processed ZnO Micro/Nanocrystals

Facile synthesis and characterization of Chrysotile/SnO2 nanocomposite for enhanced photocatalytic properties

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Facile synthesis and characterization of Chrysotile/SnO₂ nanocomposite for enhanced photocatalytic properties