期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 116, 期 -, 页码 42-48出版社
ELSEVIER
DOI: 10.1016/j.jaap.2015.10.008
关键词
Nanotechnology; Biochar; Condensed tannin; Acacia mearnsii; Green synthesis; Superparamagnetic
资金
- TWAS (Third World Academy of Science)
- CNPq (National Council of Scientific and Technological Development)
- Araucaria Foundation [17386]
Nanotechnology is an engineering science in which the aim is to develop novel procedures and structures at the nanoscale that might offer solutions to many current problems. In this article, we describe the synthesis of superparamagnetic iron oxide (Fe3O4) nanoparticles in biochar obtained from the condensed tannin extract of Acacia mearnsii, using a single-step process that is compliant with the principles of green chemistry. Characterization of this material (acronym: SPMIOBNs) was performed using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analysis. The porous particles produced contained iron oxide nanoparticles with average sizes in the range 20-35 nm. The magnetic properties revealed that the SPMIOBNPs were superparamagnetic, with a saturation magnetization of 3.2 memu/g at 300 K. (C) 2015 Elsevier B.V. All rights reserved.
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