03835nas a2200217 4500008004100000245017300041210006900214260000800283300001400291490000600305520300200311100002103313700001803334700001903352700002503371700002303396700002103419700002703440700002703467856012303494 2019 eng d00aNew porous high surface area, tio2 anatase/sapo-35 mild bronsted acidic nanocomposite: synthesis, characterization and studies on it's enhanced photocatalytic activity.0 aNew porous high surface area tio2 anatasesapo35 mild bronsted ac cAUG a9135-91420 v43 a

Anatase TiO2 and Levyne type microporous silico alumino phosphate SAPO-35 are synthesized by using hydrothermal method. TiO2/SAPO-35 nanocomposites were prepared by sol-gel method with different weight ratios. The synthesized materials were characterized by various analytical techniques such as PXRD, SEM/EDAX, TG/DTA, BET-Surface area, FT-IR, UV-Vis, XPS, MAS-NMR and photocatalytic study. From PXRD results it clearly evidenced that, the TiO2 anatase peaks and SAPO-35 combined peaks are in the composite. The spherical shaped TiO2 nanoparticles were found to be dispersed over the rhombohedral SAPO-35 particles, which was analysed by SEM. BET-surface area analysis revealed that, the calcined SAPO-35 has the surface area of 448 m(2)/g, was decreased to 222 m(2)/g for composite which is due to the presence of TiO2 particles having surface area of 85 m(2)/g on the surface of SAPO-35. The oxidation state and co-ordination of various elements present in nanocomposite was composed by X-ray photoelectron spectroscopy. MAS-NMR analysis has shown that SAPO-35 has tetrahedral Al, P and Si oxides. Eventhough Al is unique Si and P are in two different environment namely one in S6R and another in D6R with double intensity. The photocatalytic performance of methylene blue degradation under sunlight radiation by the synthesized TiO2/SAPO-35 was analyzed. The TiO2/SAPO-35 composites degrade the methylene blue under sunlight irradiation in 25 minutes against 90 minuts for pure TiO2 anatase. A plausible mechanism on photocatalytic activity is also proposed.

1 aSiliveri, Suresh1 aChirra, Suman1 aTyagi, Chinkit1 aGandamalla, Ambedkar1 aAdepu, Ajay, Kumar1 aGoskula, Srinath1 aGujjula, Sripal, Reddy1 aVenkatathri, Narayanan uhttps://library.ncl.res.in/content/new-porous-high-surface-area-tio2-anatasesapo-35-mild-bronsted-acidic-nanocomposite