Efficient synthesis of size-controlled open-framework nanoparticles fabricated with a micro-mixer: route to the improvement of Cs adsorption performance (original) (raw)
* Corresponding authors
a Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi Tsukuba, Japan
E-mail: tohru.kawamoto@aist.go.jp
b Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
c Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi Tsukuba, Japan
d Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
Abstract
We demonstrated an efficient method for size-controlled nanoparticles of the open framework coordination polymer potassium copper hexacyanoferrate (KCuHCF) using only aqueous solutions of the raw materials and a Y-type micro-mixer. Despite the high viscosity of the synthesized NP slurry, the micro-mixer provides continuous synthesis without clogging for a few hours with a high flow rate of 100 mL min−1, i.e. a linear velocity of 94 m s−1. The crystallite size, evaluated by the Scherrer equation using X-ray diffraction measurements, can be controlled by changing the flow rate. With the highest flow rate of 100 mL min−1, the smallest NPs with a size of ∼11 nm were obtained, less than half of the NP size obtained using the batch method. By downsizing the nanoparticles (NPs) using the micro-mixer synthesis, the Cs adsorption performance of potassium copper hexacyanoferrate (KCuHCF) was drastically improved. The KCuHCF with the smallest primary particles showed the fastest Cs adsorption: 1.4 times in the saturated capacity, 3.9 times in the distribution coefficient, and 7.7 times in the rate constant for the pseudo-second order adsorption theory, compared with the batch-synthesized sample.
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Article information
DOI
https://doi.org/10.1039/C5GC00757G
Article type
Paper
Submitted
08 Apr 2015
Accepted
03 Jun 2015
First published
04 Jun 2015
Download Citation
Green Chem., 2015,17, 4228-4233
Permissions
Efficient synthesis of size-controlled open-framework nanoparticles fabricated with a micro-mixer: route to the improvement of Cs adsorption performance
A. Takahashi, N. Minami, H. Tanaka, K. Sue, K. Minami, D. Parajuli, K. Lee, S. Ohkoshi, M. Kurihara and T. Kawamoto,Green Chem., 2015, 17, 4228DOI: 10.1039/C5GC00757G
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