Facile fabrication of Nd2O2S/C nanocomposite with enhanced microwave absorption induced by defects

The derivatives of metal-organic frameworks (MOFs) in which various metal and/or metal oxides are uniformly distributed in porous carbon materials have attracted considerable attention owing to their special characteristics such as large specific surface area, adjustable pore structure, highly ordered pores, and uniform metal sites. Presently, the electromagnetic absorption property of MOF derivatives is primarily enhanced by changing their metal ions, and it is still a challenge to improve the loss ability of MOF-derived absorbers by modifying the organic ligands of MOFs. In this work, rhombic Nd2O2S/C nanocomposites with excellent microwave absorption (MA) performance are synthesized via in-situ pyrolysis of (Nd[TDA][CH3COO][H2O])(n) (H(2)TDA: 2,5-thiophenedioic acid). The influence of pyrolysis temperature on the MA performance of the composites is examined. The Nd2O2S/C-800 composite exhibits a minimum reflection loss of -52.3 dB at 2.56 mm thickness, which is ascribed to the synergistic effect of multiple loss mechanisms, including polarization, conduction loss, and so forth. Overall, this paper provides a useful method to synthesize high-performance MA materials by utilizing MOFs with rare-earth ions connected by sulfur-containing organic ligand.