One pot synthesis of carbon microspheres decorated with metal nanoparticles

2017 
espanolSe sintetizaron microesferas de carbono empleando almidon como fuente de carbono decoradas con nanoparticulas metalicas de niquel, cobalto, hierro y plata respectivamente, mediante una reaccion de “one pot” via carbonizacion hidrotermica. Se obtuvieron microesferas de carbono con tamano de diametro de particulas entre 1-5 μm, los materiales obtenidos se caracterizaron por SEM, XRD,TGA y FT-IR, el analisis por FT-IR determino grupos oxigenados en la superficie de las microesferas de carbono, las cuales estan compuesta por una cascara hidrofilica y nucleo hidrofobo, el estudio por espectroscopia Raman determino desorden en la estructuras y elementos aromaticos, el estudio por difraccion de rayos X indico un bajo grado de grafitizacion en estas estructuras. EnglishThe preparation of metal nanoparticles (nickel, cobalt, iron and silver) decorated on the shell of carbon microspheres (CMS) is reported. Through a simple one-pot hydrothermal method using a starch solution, gave MSC (diameter 1–5μm), which consist of a hydrophobic core with a hydrophilic shell due to the presence of oxygen containing functional groups. The samples were characterized with SEM, X-ray, Raman, TGA and FT-IR. The metal nanoparticles (size 20–80 nm) are decorated on the circumference of the MCS in line with its core–shell structure, the analysis with FTIR determined oxygen groups on the surface, the Raman studies showed disarrayed structures and aromatic elements, and the X-ray diffraction indicated a low degree of “graphitization” in the structures.
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