Catalytic activity of porphyrin-catalyts immobilized on kaolinite

Kaolinite/TiO2/cobalt(II) Tetracarboxymetallophthalocyanine Nanocomposites as Heterogeneous Photocatalysts for Decomposition of Organic Pollutants Trimethoprim, Caffeine and Prometryn

“…Based on Fourier transform infrared (FTIR) spectra ( Figure S3, SI section), the synthesis of photocatalysts containing TiO 2 and CoMPc did not promote any changes on kaolinite interlayer region, the typical interlayer hydroxyl bands at 3696, 3670, 3654 cm −1 (inner surface) and 3621 cm -1 (inner) remain intact after reactions in acidic or alkaline media. 40,41 The presence of CoMPc on solid Kaol/TiO 2 was evidenced by the presence of vibrations at 1400 and 1415 cm −1 assigned to C=C units from the aromatic ring, and bands at 1332, 1335 and 1563 cm −1 assigned to C−N stretching modes of aromatic amines from the conjugated macrocyclic ring. 40 The nitrogen adsorption-desorption isotherms recorded for the solids (Figure S4, SI section) were classified as type III.…”

Preparation of α-MoO3 from H3PMo12O40 precursor: synthesis of 1,2-cyclohexanediol from cyclohexene over α-MoO3-TiO2 catalyst

“…Among the different products resulting from the partial oxidation of cyclohexene, diols have attracted more attention because they are basic intermediates for the synthesis of many useful products [11]. Several authors have reported the synthesis of diols using transition metal catalysts [12][13][14] and several oxidizing agents such KMnO 4 , OsO 4 [15][16][17] , alkylhydroperoxides [18][19][20], and peracids [21] have been used. Unfortunately, these oxidants used are harmful to the environment and moreover they increase the production costs due to the need for multiple purification steps.…”