Influence of the metal concentration on the phytosynthesis of nanoparticles of Iron and Zinc
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MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.473
Influence of the metal concentration on the phytosynthesis of nanoparticles of Iron and Zinc José Angel Sanjurjo-García1,2, Pablo Samuel Schabes-Retchkiman1, Ma. Guadalupe Macedo2, José Luis García-Rivas2, Javier Illescas2, Sonia Martínez-Gallegos2* 1
Instituto de Física - Universidad Nacional Autónoma de México, Materia Condensada, México Tecnológico Nacional de México/Instituto Tecnológico de Toluca, División de Estudios de Posgrado e Investigación, México 2
ABSTRACT
In this work, green nanotechnology has been applied by using phytochemical compounds as reducing agents from the plant extract of Hydrocotyle ranunuculoides through three modifications of the phytosynthesis method to prepare Fe and Zn nanoparticles, in three different concentration of the metallic solution. In the third modification a MgO support was included to avoid the Fe and Zn NP agglomeration. The nanoparticles size was 5±1 nm, and for the Fe NPs, it was determined with a cubic structure a Fe3O4 composition, and Zn nanoparticles were obtained with a hexagonal structure and Zn° composition. In the third method, MgO nanoparticle, the support appears as Mg 0 nanoparticles surrounded by Fe0 and Zn0 nanoparticles. According to the three used methods pathways, the main influence is the modification in the method synthesis. Hybrid nanocomposites provide a means in preventing agglomeration of the NPs and hence avoid coalescence and loss of properties.
INTRODUCTION There is an increasing demand on current nanoparticle (NP) synthesis techniques focused on green chemistry, thus promoting the synthesis of noble NPs with desired characteristics and applications. Usually the chemical and physical synthesis techniques are the most common, however the physical ones are very expensive and the chemical ones do not benefit the environment or living organisms, since when they are carried out in an aqueous medium, the by-products are toxic and dangerous secondary or intermediate products for the environment [1]. The alternative green method of synthesis of NPs that has been shown to have an advantage over the chemical and physical is phytosynthesis, which is also called the bioreduction method or phyto-assisted method. It
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makes use of phytochemical compounds and metal salts for the production of NPs at environmental conditions at low cost and without intermediate or toxic secondary products [1, 2, 4]. Metal NPs tends to aggregate, thus reducing their surface area resulting in a decrease of some properties as the photocatalytic activity, hence they need to be stabilized against self-aggregation for which using of suitable supports which hold their high surface area can be a solution. Among the materials used as supports used to immobilize NPs are m
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