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Photocatalytic Degradation and Toxic Effects of Ag-Doped ZnO Nanocrystallites

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Abstract:

Ag-doped ZnO nanocrystallites were synthesized from the precursor of Ag-doped zinc nitrate hexahydrate by applying hybrid induction and laser heating (HILH) techniques. The physical properties of prepared nanocrystallites were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). Silver ions doping can greatly improve the photocatalytic efficiency of ZnO nanocrystallites. This was attributed to the change of surface properties of metal ions doped semiconductor, such as O vacancies, crystal deficiencies and increased specific surface area (SSA). Increasing the amount of silver ions resulted in increased lattice deficiency and hence enhanced the photocatalytic activity. UV-Vis methods were used to detect intermediates during the degradation of DBP. The results demonstrated that the degradation rate of DBP changed over time in line, this process was basically completed in 60 mins. The acute toxicities of several silver ions doped ZnO nanocrystallites were also investigated in this study by using Scenedesmus quadricauda.

Keywords: AG-DOPED ZNO; DBP; PHOTOCATALYSIS; SCENEDESMUS QUADRICAUDA; TOXICITY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5281

Publication date: November 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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