Simple co-precipitation method to synthesis of SrWO4 and novel silver-doped SrWO4 micro/nanostructures and their photocatalytic properties

سال انتشار: 1397
محل انتشار: اولین کنگره ملی نانو فناوری در علوم سلامت
کد COI اختصاصی: NHSMED01_007
زبان مقاله: انگلیسی
تعداد مشاهده: 451

نویسندگان

Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. ۸۷۳۱۷–۵۱۱۶۷, Islamic Republic of Iran

Mahdiyeh Esmaeili-Zare

Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. ۸۷۳۱۷–۵۱۱۶۷, Islamic Republic of Iran

Mohsen Behpour

Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. ۸۷۳۱۷–۵۱۱۶۷, Islamic Republic of Iran

چکیده

Background and objective:Alkaline earth metal tungstants have attracted extensive interests because of their potential applications in various fields, such as optoelectronic industry, solid-state laser system, scintillator, photocatalysis, light emitting diodes, and energy storage materials. Over the years, many different routes were developed to obtain the SrWO4 nanostructures, for example: co-precipitation, electrochemical, sonochemical, hydrothermal process and cyclic-microwave. The low electrical conductivity, and high recombination rate of photogenerated electron-hole pair in SrWO4 nanostructures impede their practical applications. In order to resolve these problems can be used from deposition method of metallic nanoparticles.Herein, we will report the co-precipitation method for the synthesis of SrWO4 and a new Ag0-SrWO4 nanocomposite as photocatalyst material to achieve improved photocatalytic activity.Materials and methods: The SrWO4 nanostructures were synthesized by a new simplistic co-precipitation method. A typical synthesis procedure, Na2WO4 was dissolved in the Na(B(C6H5))/H2O mixture and Sr(NO3)2.3H2O solution at 70 °C for 15 min.The Ag0-SrWO4 nanocomposite was prepared as follows: the as-prepared SrWO4 nanopareticles were dissolved in the mixture of water and Na(B(C6H5)). Subsequently, AgNO3 solution was added to the above mixture. Then, the obtained gray powder was annealed at 500 °C for 1 h. The Photocatalytic activities of the SrWO4 nanostructure and Ag0-SrWO4 nanocomposite dissolved in water were measured by the decomposition of methyl orange dye under UV light illumination.Finding: In summary, SrWO4 and Ag0-SrWO4 microcrystals were successfully synthesized by co-precipitation method at 70° C for the first time. The Ag doped SrWO4 presents enhanced photocatalytic activity compared to pure SrWO4 from 52.2 to 92.03% in 100 min under UV light irradiation.Conclusion:In the XRD patterns of samples (Fig. 1), only the tetragonal SrWO4 phase were observed, that confirms the incorporation of the dopant Ag+ ion into the SrWO4 matrix.

کلیدواژه ها

SrWO4; Photocatalysis; Co-precipitation.

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