TiO2: As a versatile catalyst for the ortho-selective methylation of phenol

A Simple Method for Synthesis of S-Doped TiO2 of High Photocatalytic Activity

“…However the precursor for R3 which is a mixture of TiCl 3 , HNO 3 , thiourea and oxalic acid appeared as an amorphous, fluffy white powder. Similar observation was reported during the synthesis of N-doped anatase phase when urea was used in place of thiourea [25]. It is also evident from Table 1 that the use of oxalic acid during the synthesis favoured the formation of anatase phase.…”

The transformations involving methanol in the acid- and base-catalyzed gas-phase methylation of phenol

“…Catalysts are made of either (i) supported and unsupported alkali and alkaline-earth metal oxides [14][15][16][17][18], or (ii) transition or post-transition mixed metal oxides [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33], or (iii) mixed oxides containing both alkaline-earth metals and transition metal ions [34][35][36][37][38][39][40][41][42][43][44]. They are used in prevalence for gas-phase methylation, since under liquid-phase conditions a low conversion is generally achieved.…”

Catalytic wet air oxidation of phenol over metal catalyst (Ru,Pt) supported on TiO2–CeO2 oxides

“…On the opposite, the Lewis acid sites could activate the electronic doublet of oxygen of the hydroxyl function and thus enhance the ortho-oxidation of phenol leading to catechol and finally to CO 2 [44,48]. This finding is even more pronounced on Pt-based catalysts.…”