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A novel method for the synthesis of nano-magnetite particles

  • 투고 : 2013.06.22
  • 심사 : 2014.03.28
  • 발행 : 2014.06.25

초록

A novel and simple method for the synthesis of nano-magnetite particles is disclosed. In the novel procedure, $Fe^{2+}$ is the only source of metal cation. Carboxymethylcellulose (CMC) is used as the structure directing agent. The phase analysis of the nano-particles was performed using XRD and electron diffraction techniques. Size and morphology analysis was performed using light scattering and TEM techniques. The effect of $NH_4OH$ solution (32 wt. %) at different CMC concentrations on the size distribution of the final magnetite powders is studied. An optimal base concentration exists for each CMC concentration leading to minimal agglomeration. There exists a minimum CMC concentration (0.0016 wt. %), lower than that no magnetite forms. It is shown that using the new method, it is possible to immobilize a lipase enzyme (Candida Rugosa) with immobilization efficiency larger than 98 % with a loading more than 3 times the reported value in the literature. The latter phenomenon is explained based on the agglomerate state of the nano-particles in the liquid phase.

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참고문헌

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피인용 문헌

  1. Elastic wave dispersion modelling within rotating functionally graded nanobeams in thermal environment vol.6, pp.3, 2014, https://doi.org/10.12989/anr.2018.6.3.201