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Fabrication and high photocatalytic performance of noble metal nanoparticles supported on 3DOM InVO4–BiVO4 for the visible-light-driven degradation of rhodamine B and methylene blue.
- Source :
-
Applied Catalysis B: Environmental . Apr2015, Vol. 165, p285-295. 11p. - Publication Year :
- 2015
-
Abstract
- Three-dimensionally ordered macroporous (3DOM) InVO 4 –BiVO 4 (InBi-3D) and its supported noble metal M nanoparticles ( x M/InBi-3D; x = 0.08–0.13 wt%; M = Au, Ag, Pd, Pt) were prepared using the polymethyl methacrylate-templating and polyvinyl alcohol- or polyvinyl pyrrolidone-assisted reduction methods, respectively. Physical properties of the materials were characterized by a number of analytical techniques. Photocatalytic activities of the x M/InBi-3D samples were evaluated for the degradation of rhodamine B (RhB), methylene blue (MB), and their mixture. It is found that the as-fabricated samples possessed a surface area of 17–30 m 2 /g, a M particle size of 2.5–3.8 nm, and a bandgap energy of 2.50–2.56 eV. The x M/InBi-3D photocatalysts showed high activities for the degradation of RhB, MB, and RhB + MB in the presence of a small amount of H 2 O 2 under visible-light irradiation, among which complete degradation of RhB, MB, and RhB + MB was achieved within 50, 90, and 120 min over 0.08 wt% Au/InBi-3D, respectively. The degradation of MB and RhB fellow the zero- and first-order reaction mechanisms with respect to dye concentration, respectively. It is concluded that the high photocatalytic efficiency of the Au-loaded sample in the removal of organic dyes was associated with its high surface area, high-quality 3DOM hierarchical architecture, InVO 4 –BiVO 4 composite, and high dispersion of gold nanoparticles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 165
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 99735481
- Full Text :
- https://doi.org/10.1016/j.apcatb.2014.10.005