Prussian blue analogue-derived ZnOCo@nitrogen-depleted g-C3N4(ND-CN) for lightweight and efficient electromagnetic wave absorption

• Published in: Journal of alloys and compounds 2024-05, Vol.986, p.174166, Article 174166
• Main Authors: Ping, Chengyong, Zhu, Xiaoyu, Wang, Ruiqi, Jin, Yuxiang, Chen, Ping
• Format: Article
• Language: English
• Subjects: Electromagnetic wave absorption; Lightweight; Nitrogen-depleted g-C3N4; Prussian blue analogs
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2024.174166

The sustainable electromagnetic (EM) environment urgently needs the development of high-performance absorbers. This study involved synthesizing a series of ZnOCo@ND-CN (X) composites through in-situ depositing Prussian blue analogue (Zn3[Co(CN)6]2) on varying amounts of Nitrogen-Depleted g-C3N4 (ND-CN), followed by carbonization. Adjusting the amount of ND-CN in the composites can effectively regulate the dielectric constant. The as-fabricated defective structures with high electrical conductivity and the synergy between ND-CN with ZnOCo particles, as well as the presence of a variety of heterogeneous interfaces, which endow the composites with the impressive EM wave absorption properties. ZnOCo@ND-CN (0.2) simultaneously exhibits a minimum reflection loss value of −51.57 dB and a widest effective absorption bandwidth of 5.70 GHz at the thickness of only 1.7 mm with merely 8 wt% filler. This work provides a scalable strategy for the construction of multicomponent PBA-derived composites for lightweight and high-performance microwave absorption. •The PBA-derived ZnOCo particles supported on Nitrogen-Depleted g-C3N4 have been constructed.•Wrinkle-like ND-CN with abundant pore structure contributes to lightweight and multiple reflection & scattering.•Synergy between compositions: ZnOCo enhances the impedance matching and ND-CN augments the dielectric loss.•The RLmin value of −51.57 dB and EAB of 5.70 GHz are achieved at the thickness of only 1.7 mm with 8 wt% filled.