Filter paper templated one-dimensional NiO/NiCo2O4 microrod with wideband electromagnetic wave absorption capacity

Ming Qin; Hongsheng Liang; Xiaoru Zhao; Hongjing Wu

doi:10.1016/j.jcis.2020.01.114

Filter paper templated one-dimensional NiO/NiCo₂O₄ microrod with wideband electromagnetic wave absorption capacity

J Colloid Interface Sci. 2020 Apr 15:566:347-356. doi: 10.1016/j.jcis.2020.01.114. Epub 2020 Feb 1.

Authors

Ming Qin¹, Hongsheng Liang¹, Xiaoru Zhao¹, Hongjing Wu²

Affiliations

¹ School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
² School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: wuhongjing@nwpu.edu.cn.

PMID: 32018175
DOI: 10.1016/j.jcis.2020.01.114

Abstract

Filter paper, as a widely used and low-cost lab consumable, can serve as template for the synthesis of one-dimensional (1D) materials since it is composed of 1D cellulosic fiber. In this work, 1D NiO/NiCo₂O₄ composite was simply fabricated by adsorption of Ni and Co acetate on the filter paper and subsequent calcination process. The precursors were obtained without further treatment to filter paper or chemical reaction between metal salts. Calcination process leads to the removal of template and formation of binary NiO/NiCo₂O₄ composite. Electromagnetic (EM) wave absorption performance of NiO/NiCo₂O₄ composite could be tuned by adjusting the calcination temperatures and dosage of metal salts. For the optimized absorber (calcination temperature of 600 °C and dosage of Ni and Co acetate with 2 mmol and 4 mmol), a wide absorption bandwidth of 6.08 GHz could be achieved with thickness of 1.88 mm and minimum reflection loss value was up to -57.4 dB by changing the thickness. The facile synthetic route may also inspire the preparation of other high-performance one-dimensional EM wave absorbing materials.

Keywords: Filter paper; One-dimensional NiO/NiCo(2)O(4) microrod; Wideband electromagnetic wave absorption.