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Fabrication of Pt/TiO 2 Nanocomposites in Alginate and Their Applications to the Degradation of Phenol and Methylene Blue in Aqueous Solutions
Author(s) -
Chen Peng,
Zhang Xiaogang
Publication year - 2008
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.200800089
Subject(s) - photocatalysis , aqueous solution , methylene blue , calcination , materials science , nanocomposite , x ray photoelectron spectroscopy , phenol , chemical engineering , nuclear chemistry , sol gel , nanoparticle , composite material , catalysis , nanotechnology , chemistry , organic chemistry , engineering
New Pt‐containing titania composites have been produced by a conducting sol‐gel method within Pt/alginate hydrogels. The alginate gel was used as a template to prevent the conglomeration of the inorganic materials. During the calcination process, the Pt nanoparticles, which had been loaded in the alginate porous networks were transferred to the titania system, and formed the Pt/TiO 2 composites. The amount of Pt embedded was studied from 0 to 0.74 mol.‐% (where mol.‐% refers to the Pt/TiO 2 molar ratio), and the morphology and structure of the Pt/TiO 2 composites were characterized by SEM, TEM, HAADF‐STEM, XPS, XRD, in addition to a study of the photocatalytic efficiency of these composites in aqueous methylene blue and phenol. Higher photocatalytic activity was observed at higher levels of Pt added to the titania system. The 0.37 mol.‐% sample was found to present the highest photocatalytic activity for the photodecomposition of aqueous methylene blue and phenol.