Biopolymer starch mediated synthetic route of multi-spheres and donut ZnO structures. (22nd January 2015)

• Record Type: Journal Article
• Authors: Carp, Oana; AlinaTirsoaga, ; Jurca, Bogdan; Ene, Ramona; Somacescu, Simona; Ianculescu, Adelina
• Is Part Of: Carbohydrate polymers. Volume 115(2015)
• Page Start: 285
• Page End: 293
• Publication Date: 2015-01-22
• Subjects: Starch -- ZnO -- Multi-spheres and donut structure -- Optical properties, Visible-photocatalyst; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2014.08.061
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Biopolymer starch as phase and morphology controller in ZnO synthesis. A synthesis method of multi-spheres ZnO–starch composite was developed. Thermal processing facilitates the formation of donut-like ZnO morphology. The ZnO based structures prove motivating optical and photocatalytical properties. Abstract: A starch-assisted synthetic methodology of multispheres ZnO–starch biocomposites was developed. An additional thermal processing of the ZnO–starch composites induces the formation of ZnO with donut-like morphology. The synthesis of single-phase zinc oxide with a spherical morphology is conditioned by the presence of starch, which acts as template, stabilizing/capping agent. The synthesized structures present significant photocatalytic activities; a total phenol mineralization is attained with the donut-like ZnO photocatalyst under visible light irradiation, due to a cumulative effect of the its relatively large specific surface area, high crystallinity and favorable combination of defects for band narrowing, which together permit an enhanced utilization rate of the light.