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Liu, Hui; Dong, Xiaonan; Liu, Tingting; Zhu, Zhenfeng
Solar energy materials and solar cells, January 2015, 2015-01-00, Letnik: 132Journal Article
Silver-modified TiO2 microspheres (SMTMs) have been synthesized via a novel in-situ Ag-loading method in which tetrabutyl titanate (TBOT) is hydrolyzed in a mixed solution of ethanol and AgNO3. The structures, compositions and optical properties of the as-prepared products were characterized by XRD, FT-IR, EDX, XPS, FESEM, HRTEM and UV–vis diffuse reflectance techniques, and the photocatalytic properties of the product was estimated for the photodegradation of rhodamine B (Rh B) under visible light irradiation. The photo-response of the as-obtained SMTMs is greatly shifted into the visible light spectrum, and exhibits a band gap narrowing compared with that of pure TiO2 microspheres (PT). The photocatalytic tests of SMTMs reveal a much higher photocurrent and photocatalytic activity than that of other composites and PT. However, the photocatalytic activities of SMTMs in aqueous suspension depend on the Ag-loading process. The product synthesized by using, for example, an in-situ Ag-loading process not only showed an enhanced visible light-driven photocatalytic activity, but also displayed good photocatalytic stability. Display omitted •In-situ Ag-loading is a potential technique for obtaining the silver-modified TiO2.•The photocatalytic activity of the products on degradation of Rh B was evaluated.•The SMTMs show the highest photocatalytic activity under visible light irradiation.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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