Muhammad Hisyam Habani, Rizka Utami, Arif Hidayat, Nurul Hidayat, Tahta Amrillah, Mudrik Alaydrus, Erfan Handoko, Erlina Yustanti, Hubby Izzuddin, Ahmad Taufiq
In this work, we developed ZnFe2O4/PANI/rGO nanocomposites based on coconut shell waste through in situ polymerization as excellent radar-absorbing material (RAM). This research mainly focused on adjusting the ZnFe2O4 content to obtain optimal absorption of radar waves, especially in the X-band. The results showed that the diffraction pattern of the ZnFe2O4/PANI/rGO nanocomposites showed multiple phases (crystalline and amorphous), which increased the ZnFe2O4 content and affected the increasing diffraction intensity. The functional group of the ZnFe2O4/PANI/rGO nanocomposites was identified with the presence of the M–O group originating from ZnFe2O4 at wavenumbers 517 and 419 cm−1 of Zn–O and Fe–O groups, respectively. Meanwhile, quinoid and benzenoid rings from PANI and C[dbnd]O from rGO were identified at wavenumbers 1580, 1504, and 1710 cm−1, respectively. The morphology of the ZnFe2O4/PANI/rGO nanocomposites showed PANI was distributed on the ZnFe2O4 nanoparticles, which were subsequently deposited on the rGO. The ZnFe2O4/PANI/rGO nanocomposites exhibited superparamagnetic properties, as confirmed by their coercivity values ranging from 9.2 to 124.4 Oe. Interestingly, the ZnFe2O4/PANI/rGO nanocomposites with the P3 sample showed optimal RAM performance with a minimum reflection loss value of −39.8 dB at 7.6-GHz frequency with an effective absorption bandwidth of 1.1 GHz. © 2024 Elsevier B.V.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Universitas Airlangga, Indonesia, Kampus C, Jl. Dr. Ir. H. Soekarno, Jawa Timur, Surabaya, 60115, Indonesia; Department of Electrical Engineering, Universitas Mercu Buana, Jl. Meruya Selatan 1, Jakarta, 11650, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka 1, Jakarta, 13220, Indonesia; Department of Metallurgical Engineering, Faculty of Engineering, Sultan Ageng Tirtayasa University, Jl. Jenderal Sudirman KM 3 Cilegon, Banten, 42435, Indonesia; Research Center for Advanced Materials, National Research and Innovation Agency (BRIN), Kawasan Sains dan Teknologi BJ Habibie, Banten, Tangerang Selatan, 15314, Indonesia
