Sol–gel microwave assisted synthesis of Sm-doped TiO2 nanoparticles and their photocatalytic activity for the degradation of Methyl Orange under sunlight

Enhanced photocatalytic activity of Se-doped TiO2 under visible light irradiation

“…Due to the small concentration of Se in TSe5, the less formation of TiO 6 octahedra might facilitate the polycondensation process of TiO 6 octahedra in corner sharing arrangement, leading to the larger crystallite size of anatase phase 27 . However, with further increasing the doping concentration, the doped Se ions might not occupy the lattice site, and thus the growth of the crystallite size was prevented 30 . The similar rule but much higher Se concentration in our work compared with Khan et al .’s work might be due to the much lower calcining temperature in our work, leading to the much smaller crystallite size and much higher tolerable doping concentration 27 .…”

The controlled synthesis of g-C3N4/Cd-doped ZnO nanocomposites as potential photocatalysts for the disinfection and degradation of organic pollutants under visible light irradiation

“…The samples display type IV isotherms with an H 3 hysteresis loop according to the IUPAC classication, indicating that the composite materials possess a mesoporous structure. 32 It can be observed in Fig. 6(b) that the spherical-shape CdO NPs possess the smallest surface area (11.12 m 2 g À1 ), while the g-C 3 N 4 /Cd-ZnO heterostructured photocatalyst has the largest surface area (60.90 m 2 g À1 ).…”

Structural and Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium

“…Doped titania gels are prepared where presence of neodymium stabilizes the amorphous phase of the sample up to higher temperatures (400 °C) as compared to the other one containing samarium [ 16 ]. It is also confirmed that Sm 3+ ions increase the surface area but also enhance the photocatalytic activity under UV or solar light irradiation on Sm-doped TiO 2 [ 16 , 17 , 18 , 19 ]. With reference to organic dyes, it was established that the presence of Sm is highly effective against Methyl orange [ 20 ].…”