TiO2–SiO2 mixed oxide supported MoO3 catalyst: Physicochemical characterization and activities in nitration of phenol

Microwave hydrothermal synthesis, characterisation, and catalytic performance of Zn1−x MnxO in cellulose conversion

“…The desorption in the HT region is associated with strong acid sites (Lewis and Brønsted) and the desorption in the LT region with weak acid sites (Kemdeo et al, 2010). The TPD patterns show major desorption peaks differing by samples in their positions and profiles, suggesting changes not only in the total acidity but also in the distribution of the acid strength in the samples.…”

Molybdenum Oxide Supported on Silica (MoO /SiO ): An Efficient and Reusable Catalyst for the Synthesis of 1,8-dioxodecahydroacridines Under Solvent-free Conditions

“…Using solid acid catalysts have some advantages such as ease of products separation, recycling of the catalyst and environmental acceptability as compared to a liquid acid catalyst [16]. There are many surfaces for supporting different acid catalysts, for example: SiO 2 [17], Al 2 O 3 [18], TiO 2 [19], and hydroxyapatite [20], among them, silica has many advantages for supporting MoO 3 as an acidic catalyst. It is insoluble in common organic solvents, causes low corrosion, and shows environmental acceptability.…”

Peroxy Compounds as Eco-Friendly Catalysts for Nitration of Aromatic Compounds Using Sodium Nitrite in Aqueous Bisulfate Medium

“…To overcome these issues, several modified protocols have been developed over the years. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] One of the forefront reagents developed in direction is nitronium tetrafluoroborate, [(NO2) + (BF4) -], which has several advantages over nitric acid, apart from supplementing isolated the active nitronium ion ingredient. 3 There are several other protocols that avoided the use of sulfuric acid completely, but used small amounts of HNO3 along with other co-catalysts to accomplish nitration.…”

“…3 There are several other protocols that avoided the use of sulfuric acid completely, but used small amounts of HNO3 along with other co-catalysts to accomplish nitration. [4][5][6][7][8][9][10][11][12][13][14] Micelle-forming surfactants, [15][16][17] supported catalysts such as P2O5 immobilized on silica gel, 18 metalmodified montmorillonite, 19 Al(H2PO4)3 (ref. 20), and V(V) heteropolyacids 21 have also been used as efficient catalysts to synthesize nitroaromatic compounds in the presence of dilute HNO3.…”