title: Preparation and characterization of hydrophobic TiO(2) pillared clay: the effect of acid hydrolysis catalyst and doped Pt amount on photocatalytic activity.
abstract: Titanium hydrate sols were prepared using different acid hydrolysis catalysts, i.e., acetic acid and hydrochloric acid. The platinum-doped TiO(2) sol-gels were also synthesized by adding K(2)PtCl(6) into the titanium hydrate sols. The hydrophobic montmorillonite clay, treated with organic cationic surfactant, i.e., hexadecyltrimethylammonium bromide, was used as a template to prepare TiO(2) pillared photocatalyst with the above sols. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) were employed to characterize the resulting photocatalysts. The adsorption performance and photoactivity of prepared pillared clays were studied by using methyl orange as a model organic pollutant. The preliminary results indicated that the hydrophobic TiO(2) pillared clay prepared with acetic acid as the acid hydrolysis catalysts possessed higher photocatalytic activity than that with hydrochloric acid. Due to the excellent sedimentation property of the clay, the resulting pillared photocatalyst is easily recovered and reused in the postrun treatment. Also the doping of platinum into the hydrophobic photocatalyst can increase the photocatalytic activity significantly.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Ding
authors.forename: Taicheng
authors.initials: T
authors.lastname: An
authors.forename: Guiying
authors.initials: G
authors.lastname: Li
authors.forename: Shanqing
authors.initials: S
authors.lastname: Zhang
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Chen
authors.forename: Jianmei
authors.initials: J
authors.lastname: Yuan
authors.forename: Huijun
authors.initials: H
authors.lastname: Zhao
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Guoying
authors.initials: G
authors.lastname: Sheng
authors.forename: Jiamo
authors.initials: J
authors.lastname: Fu
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D000538:Aluminum Silicates / Q000138:chemical synthesis* / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D000077215:Clay; D006851:Hydrochloric Acid / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010777:Photochemistry; D010984:Platinum / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D001391:Azo Compounds; D002593:Cetrimonium Compounds; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D010984:Platinum; C100258:methyl orange; D014025:Titanium; D019342:Acetic Acid; D006851:Hydrochloric Acid; D000077215:Clay; D000077286:Cetrimonium