α-MnO2 modified exfoliated porous g-C3N4 nanosheet (2D) for enhanced photocatalytic oxidation efficiency of aromatic alcohols

In the context of the increase in chemical threat due to warfare agents, the development of efficient methods for destruction of Chemical Warfare Agents (CWAs) are of first importance both for civilian and military purposes. Amongst possible methods for destruction of CWAs, photocatalytic oxidation is an alternative one. The present paper reports on the preparation of Ta and Sn doped TiO2 photocatalysts immobilized on β-SiC foams for the elimination of diethyl sulfide (DES) used as a model molecule mimicking Yperite (Mustard Gas) in gaseous phase. Photo-oxidation efficiency of doped TiO2 catalyst has been compared with TiO2-P25. Here, we demonstrate that the Sn doped-TiO2 with a Polyethylene glycol (PEG)/TiO2 ratio of 7 exhibits the best initial activity (up to 90%) but is deactivates more quickly than Ta doped-TiO2 (40% after 800 min). The activity of the catalysts is strongly influenced by the adsorption properties of the support, as β-SiC foams adsorb DES and other sulfur compounds. This adsorption makes it possible to limit the poisoning of the catalysts and to maintain an acceptable conversion rate even after ten hours under continuous DES flow. Washing with NaOH completely regenerates the catalyst after a firs treatment and even seems to “wash” it by removing impurities initially present on the foams.

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Nanostructured Rutile TiO2for Selective Photocatalytic Oxidation of Aromatic Alcohols to Aldehydes in Water

Journal of the American Chemical Society ◽

10.1021/ja709989e ◽

2008 ◽

Vol 130 (5) ◽

pp. 1568-1569 ◽

Cited By ~ 359

Author(s):

Sedat Yurdakal ◽

Giovanni Palmisano ◽

Vittorio Loddo ◽

Vincenzo Augugliaro ◽

Leonardo Palmisano

Keyword(s):

Photocatalytic Oxidation ◽

Aromatic Alcohols

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Selective photocatalytic oxidation of aromatic alcohols in solar-irradiated aqueous suspensions of Pt, Au, Pd and Ag loaded TiO 2 catalysts

Catalysis Today ◽

10.1016/j.cattod.2016.05.054 ◽

2017 ◽

Vol 281 ◽

pp. 53-59 ◽

Cited By ~ 31

Author(s):

Sedat Yurdakal ◽

Bilge Sina Tek ◽

Çağlar Değirmenci ◽

Giovanni Palmisano

Keyword(s):

Photocatalytic Oxidation ◽

Aqueous Suspensions ◽

Aromatic Alcohols

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Photocatalytic removal of cyanide with illuminated TiO2

Water Science & Technology ◽

10.2166/wst.2011.738 ◽

2011 ◽

Vol 64 (7) ◽

pp. 1383-1387 ◽

Cited By ~ 19

Author(s):

M. Shirzad Siboni ◽

M. R. Samarghandi ◽

J.-K. Yang ◽

S.-M. Lee

Keyword(s):

Aqueous Solutions ◽

Langmuir Isotherm ◽

Industrial Wastewater ◽

Photocatalytic Oxidation ◽

Maximum Adsorption Capacity ◽

Photocatalytic Reaction ◽

Solution Ph ◽

Cyanide Concentration ◽

Photocatalytic Removal ◽

Oxidation Efficiency

Effects of TiO2 dosage, pH and initial cyanide concentration on the removal efficiency of cyanide from aqueous solutions with illuminated TiO2 have been investigated. Adsorption and oxidation were recognized as significant processes for the elimination of cyanide. From the Langmuir isotherm, the maximum adsorption capacity was determined as 17.24 mg/g at pH 7. Adsorbed amount of cyanide slightly increased as the TiO2 dosage increased. However, as no significant increase was observed above 1 g/L TiO2, an optimum TiO2 dosage was determined as 1 g/L. Photocatalytic oxidation efficiency of cyanide was greatly affected by the solution pH. It increased as the solution pH decreased. The photocatalytic oxidation efficiency after 120 min was 80.4% at pH 3 while it was only 20.4% at pH 11. Photocatalytic oxidation of cyanide was well described by the second-order kinetics. Photocatalytic reaction with illuminated TiO2 can be effectively applied to treat industrial wastewater contaminated with cyanide.

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Effect of Substituents on Partial Photocatalytic Oxidation of Aromatic Alcohols Assisted by Polymeric C 3 N 4

ChemCatChem ◽

10.1002/cctc.201900362 ◽

2019 ◽

Vol 11 (11) ◽

pp. 2713-2724 ◽

Cited By ~ 8

Author(s):

Igor Krivtsov ◽

Marina Ilkaeva ◽

Elisa I. García‐López ◽

Giuseppe Marcì ◽

Leonardo Palmisano ◽

...

Keyword(s):

Photocatalytic Oxidation ◽

Effect Of Substituents ◽

Aromatic Alcohols

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Selective photocatalytic oxidation of aromatic alcohols to aldehydes with air by magnetic WO3ZnO/Fe3O4. In situ photochemical synthesis of 2-substituted benzimidazoles

RSC Advances ◽

10.1039/d0ra08403d ◽

2020 ◽

Vol 10 (67) ◽

pp. 40725-40738

Author(s):

Bozhi Li ◽

Reza Tayebee ◽

Effat Esmaeili ◽

Mina S. Namaghi ◽

Behrooz Maleki

Keyword(s):

Photocatalytic Oxidation ◽

Photochemical Synthesis ◽

Magnetic Photocatalyst ◽

Benzyl Alcohols ◽

Atmospheric Air ◽

Aromatic Alcohols

WO3ZnO/Fe3O4 is used as a magnetic photocatalyst in the preparation of 2-substituted benzimidazoles in EtOH at RT. The key feature is the in situ photocatalytic oxidation of benzyl alcohols to benzaldehydes under atmospheric air in the absence of further oxidant.

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Solvent controlled selective photocatalytic oxidation of benzyl alcohol over Ni@C/TiO2

10.26434/chemrxiv-2021-l53j3 ◽

2021 ◽

Author(s):

Song Zhenlong ◽

Jianguo Liu ◽

Qi Zhang

Keyword(s):

Benzyl Alcohol ◽

Photocatalytic Oxidation ◽

Large Scale ◽

Low Cost ◽

Alcohol Oxidation ◽

Scale Production ◽

Chemical Production ◽

Environmental Friendliness ◽

Highly Active ◽

Aromatic Alcohols

The oxidation of aromatic alcohols to produce carbonyl compounds is of great significance in fine chemical production. The traditional oxidation produces waste gas and pollutes the environment during the reaction. As a new field, photocatalysis has attracted people's attention because of its environmental friendliness. At present, there have been much research on TiO2, or noble metal modified TiO2 to catalyze alcohol oxidation, but the high cost is not conducive to large-scale production. Herein, a Ni@C/TiO2 catalyst was prepared by in-situ hydrothermal synthesis. This catalyst has a better oxidation effect on benzyl alcohol than Ni@C supported on TiO2 on the market and has a good catalytic effect on aromatic alcohols with different substituents. It is more interesting that the selectivity of the product can be adjusted by choosing different reaction solvents. The highly active catalyst with low cost and wide applicability has certain significance for the large-scale use of photocatalytic alcohol oxidation.

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