A facile environmental friendly method has been developed to prepare silver nanospheres with good dispersion and the size in the range of 300 - 400 nm. Silver nanospheres were obtained via the chemical reduction of Tollens’ reagent at room temperature, using ascorbic acid as the reducing agent and polyvinylpyrrolidone (PVP) as the surfactant. The obtained silver nanospheres were characterized by X-ray powder diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and UV-visible spectroscopy (UV-vis). The influence of reaction time and the amount of PVP and ammonium hydroxide on the formation of silver nanospheres was studied. The growth process of silver nanospheres was analyzed and the possible mechanism of crystal growth was proposed. The catalytic degradation activity of the obtained silver nanospheres on methylene blue was also measured. They showed excellent catalytic degradation activity on methylene blue.
Steffan, M., Jakob, A., Claus, P. and Lang, H. (2009) Silica supported silver nanoparticles from a silver(I) carboxylate: Highly active catalyst for regioselective hydrogenation. Catalysis Communications, 10, 437-441.
Sun, Y.G., Yin, Y.D., Mayers, B.T., Herricks, T. and Xia, Y.N. (2002) Uniform silver nanowires synthesis by reducing AgNO3 with ethylene glycol in the presence of seeds and poly(vinyl pyrrolidone). Chemistry of Materials, 14, 4736- 4745.
Rastogi, P.K., Ganesan, V. and Krishnamoorthi, S. (2012) Microwave assisted polymer stabilized synthesis of silver nanoparticles and its application in the degradation of environmental pollutants. Materials Science And Engineering B- Advanced Functional Solid-State Materials, 177, 456-461.
Sanpui, P., Chattopadhyay, A. and Ghosh, S.S. (2011) Induction of Apoptosis in Cancer Cells at Low Silver Nanoparticle Concentrations using Chitosan Nanocarrier. Acs Applied Materials & Interfaces, 3, 218-228.
Gonzalez, C.M., Liu, Y. and Scaiano, J.C. (2009) Photochemical Strategies for the Facile Synthesis of Gold-Silver Alloy and Core-Shell Bimetallic Nanoparticles. Journal Of Physical Chemistry C, 113, 11861-11867.
Shafaghat, A. (2015) Synthesis and characterization of silver nanoparticles by phytosynthesis method and their biological activity. Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry, 45, 381-387.
Jiang, L.P., Wang, A.N., Zhao, Y., Zhang, J.R. and Zhu, J.J. (2004) A novel route for the preparation of monodisperse silver nanoparticles via a pulsed sonoelectrochemical technique. Inorganic Chemistry Communications, 7, 506-509.
Soltanzadeh, N. and Morsali, A. (2010) Sonochemical synthesis of a new nano-structures bismuth(III) supramolecular compound: New precursor for the preparation of bismuth(III) oxide nano-rods and bismuth(III) iodide nano-wires. Ultrasonics Sonochemistry, 17, 139-144.
Jeevanandam, P., Koltypin, Y., Palchik, O. and Gedanken, A. (2001) Synthesis of morphologically controlled lanthanum carbonate particles using ultrasound irradiation. Journal of Materials Chemistry, 11, 869-873.
Kotlyar, A., Perkas, N., Amiryan, G., Meyer, M., Zimmermann, W. and Gedanken, A. (2007) Coating silver nanoparticles on poly(methyl methacrylate) chips and spheres via ultrasound irradiation. Journal of Applied Polymer Science, 104, 2868-2876.
Vadakkekara, R., Chakraborty, M. and Parikh, P.A. (2012) Reduction of aromatic nitro compounds on colloidal hollow silver nanospheres. Colloids and Surfaces a-Physicochemical and Engineering Aspects, 399, 11-17.
Lee, C.L., Syu, C.M., Chiou, H.P., Chen, C.H. and Yang, H.L. (2011) High-yield, size-controlled synthesis of silver nanoplates and their applications as methanol-tolerant electrocatalysts in oxygen reduction reaction. International Journal of Hydrogen Energy, 36, 10502-10512.
Small, J.M. and Hintelmann, H. (2007) Methylene blue derivatization then LC-MS analysis for measurement of trace levels of sulfide in aquatic samples. Analytical and Bioanalytical Chemistry, 387, 2881-2886.
Gupta, N., Singh, H.P. and Sharma, R.K. (2011) Metal nanoparticles with high catalytic activity in degradation of methyl orange: An electron relay effect. Journal of Molecular Catalysis A: Chemical, 335, 248-252.
Mallick, K., Witcomb, M. and Scurrell, M. (2006) Silver nanoparticle catalysed redox reaction: An electron relay effect. Materials Chemistry and Physics, 97, 283-287. http://www.cajcd.edu.cn/pub/wml.html