title: Temperature-assisted photochemical construction of CdS-based ordered porous films with photocatalytic activities on solution surfaces.
abstract: Taking a colloidal monolayer floating on the surface of a precursor solution as template, free-standing CdS/Cd composites and pure CdS (CdS-based) ordered porous films had been prepared by a temperature-assisted photochemical strategy. After irradiation with UV-light and heat treatment, the films formed hemi-spherical pores due to the preferable deposition of CdS and Cd onto the PS spheres during the photochemical and interfacial reactions. When the temperature increased from 15 to 60°C, the air/water interface gradually changed into a vapor/water interface on the surface of the solution, resulting in variations of the final compositions. The optical properties of the films were hence changed. Because of the free-standing characteristic, the ordered porous films were first transferred on surface of polluted solutions as photocatalysts, which was a new mode in application of photocatalysts. The photocatalytic activities of films showed regular variations with the compositions in photodegradation of Rhodamine B. This method provides a simple route for tuning the properties of porous films through control of its composition and a flexible application of films on any surface.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, China.
authors.forename: Zhenxun
authors.initials: Z
authors.lastname: Huang
authors.forename: Fengqiang
authors.initials: F
authors.lastname: Sun
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Kaiyuan
authors.initials: K
authors.lastname: Gu
authors.forename: Xueqiong
authors.initials: X
authors.lastname: Zou
authors.forename: Yuying
authors.initials: Y
authors.lastname: Huang
authors.forename: Qingsong
authors.initials: Q
authors.lastname: Wu
authors.forename: Zihe
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D002384:Catalysis; D010777:Photochemistry / Q000379:methods*; D016062:Porosity; D012666:Semiconductors; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide