Efficient and selective oxidation of benzylic alcohol by O2 into corresponding aldehydes on a TiO2 photocatalyst under visible light irradiation: Effect of phenyl-ring substitution on the photocatalytic activity

Photocatalysis of titanium dioxide modified by catechol-type interfacial surface complexes (ISC) with different substituted groups

“…Therefore, the development of visible-light-sensitive TiO 2 photocatalyst has been a great concern for efficient utilization of solar light [6][7][8][9]. Visible-light-responsive TiO 2 photocatalysts have been designed by several methods such as doping with nitrogen and other elements [10][11][12][13][14], organic dye sensitizer [15], plasmonic Au and Ag nanoparticles [16][17][18][19], and interfacial surface complexes (ISC) [20][21][22][23][24][25][26][27][28][29][30].…”

DFT study on the reaction mechanisms behind the catalytic oxidation of benzyl alcohol into benzaldehyde by O2 over anatase TiO2 surfaces with hydroxyl groups: Role of visible-light irradiation

“…Hence, the selective photocatalytic oxidation of alcohols by O 2 under UV-light and/or visible-light irradiation on such photocatalyst as pure TiO 2 [8][9][10][11][12][13][14], dye-sensitized TiO 2 [15], gold nano-particles supported TiO 2 or CeO 2 [16,17], Fe 3+ or Rh 3+ ions modified TiO 2 [18,19], nitrogendoped TiO 2 [20], Nb 2 O 5 [21,22] and carbon nitride (C 3 N 4 ) [23] have been widely studied.…”

“…However, we have previously reported that the photocatalytic oxidation of benzyl alcohol and its derivatives, such as 4-methoxybenzyl alcohol, 4-chlorobenzyl alcohol, 4-nitrobenzyl alcohol, 4-methylbenzyl alcohol, 4-(trifluoromethyl) benzyl alcohol, and 4-tertiary-butylbenzyl alcohol into corresponding aldehydes proceeded at high conversion and selectivity on a TiO 2 photocatalyst under O 2 atmosphere [11,13]. The reaction was confirmed to proceed under irradiation with both UV-light and visible light.…”

Synthesis, Characterization, and Relative Study on the Catalytic Activity of Zinc Oxide Nanoparticles Doped MnCO3, –MnO2, and –Mn2O3 Nanocomposites for Aerial Oxidation of Alcohols

“…In order to exploit the applicability of the present catalytic system and to generalize the scope of the oxidation process, the oxidation reaction has extended to various types of alcohol such as primary aromatic, allylic, heteroaromatic, and aliphatic alcohols. Generally, all primary aromatic alcohols could be oxidized rapidly to the corresponding aldehydes with complete conversions within very short reaction times (Table 6, entries [10][11][12][13][14][15][16][17][18][19][20][21][22]. Moreover, more than 99% selectivity to corresponding aldehydes has been achieved in most of oxidation reactions and no other products were detected in the reaction mixture because no overoxidation to carboxylic acids occurred.…”

“…The oxidation products such as aldehyde and ketone derivatives are important precursors and intermediates in the cosmetics, perfumery, flame-retardants, insecticides, confectionary, biofuels, and pharmaceutical industries [7][8][9][10][11]. Usually, conventional oxidation of alcohols was conducted using toxic and expensive stoichiometric oxidizing agents such as CrO 3 , KMnO 4 , NaClO, Na 2 Cr 2 O 7 , SeO 2 , and Br 2 and leads to producing harmful by-products [12,13].…”