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首页> 外文期刊>CERAMICS INTERNATIONAL >Magnetic nanocomposite Ba-ferrite/a-iron hollow microfiber: A multifunctional ID space platform for dyes removal and microwave absorption
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Magnetic nanocomposite Ba-ferrite/a-iron hollow microfiber: A multifunctional ID space platform for dyes removal and microwave absorption

机译：磁性纳米复合钡铁氧体/ a-铁空心超细纤维：用于去除染料和吸收微波的多功能ID空间平台

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摘要

A facile gel-thermal selective reduction process was designed for the preparation of magnetic nanocomposite Ba-ferrite/α-iron hollow microfibers. The nanocomposite Ba-ferrite/a-iron microfibers were obtained after the reduction of the as-prepared Ba-ferrite/α-Fe_2O_3 microfibers at 375 °C for 1 h. SEM and TEM revealed that the nanocomposite Ba-ferrite/a-iron microfibers were constructed by plate-like and spherical particles with hollow structure. Dye removal experiments demonstrate that the combination of Ba-ferrite and a-iron can lead to larger numbers of methyl blue dye molecules removal from aqueous solution. This enhanced removal performance can be attributed to the unique nanocomposite structure, peculiar electron transfer, adsorption and reduction. These binary microfibers can also be used as absorbents for microwave absorption. For the Ba-ferrite/a-iron microfibers with designed mass ration of 1/4 reduced at 375 °C and a specimen thickness of 3.0 mm, the optimal reflection loss (RL) reaches —20.6 dB at 13.1 GHz, and the bandwidth exceeding — 10 dB covers the whole X-band and 54% K_u-band. Hence, these magnetic nanocomposite Ba-ferrite/a-iron hollow microfibers can provide a multifunctional ID space platform for dyes removal and microwave absorption.
机译：设计了一种简便的凝胶-热选择性还原工艺制备磁性纳米复合钡铁氧体/α-铁空心微纤维。在375℃下还原制备的Ba-铁氧体/α-Fe_2O_3微纤维1小时后，得到纳米复合Ba-铁氧体/α-铁微纤维。 SEM和TEM表明，纳米复合钡铁氧体/α-铁微纤维是由具有空心结构的板状球形颗粒构成的。染料去除实验表明，钡铁氧体和α-铁的组合可导致从水溶液中去除大量的甲基蓝染料分子。这种增强的去除性能可归因于独特的纳米复合结构，独特的电子转移，吸附和还原。这些二元超细纤维也可用作微波吸收的吸收剂。对于在375°C下设计质量比为1/4的钡铁氧体/α-铁微纤维，样品厚度为3.0 mm，最佳反射损耗（RL）在13.1 GHz时达到--20.6 dB，带宽超过— 10 dB覆盖整个X波段和54％的K_u波段。因此，这些磁性纳米复合钡铁氧体/α-铁空心微纤维可提供用于染料去除和微波吸收的多功能ID空间平台。

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