Construction of hollow copper selenide boxes and S-doping for enhanced electromagnetic wave absorption

With the proliferation of use wireless communication technologies, lightweight, easily fabricated electromagnetic wave (EMW) absorbers are in great demand for commercial and stealth applications. In this paper, well-defined Cu2O microcubes were successfully converted into S-doped Cu2-xSe micro-cubic boxes at room temperature by a template-directed situ selenization/sulfidation reaction. The obtained under combined effect Kirkendall Ostwald ripening, composite products with paraffins exhibited good EMW low-frequency absorption properties 40 wt%, RL(min) exceeding -20 dB from 2.6 mm-5.0 mm. addition, sulfidation process optimized morphology, composition, interface, defects conductivity, which further enhanced performance material. reaches -44.5 1.9 mm an EAB 4.3 GHz.