Activated carbon from biomass waste candlenut shells (Aleurites moluccana) doped ZIF-67/Fe3O4 as advanced materials for supercapacitor

Abstract

Biomass waste candlenut shells, such as adsorbent carbon, can be utilized. Fe3O4 has great electrical conductivity, and ZIF-67 has diverse pores. Activated carbon, Fe3O4, and ZIF-67 were prepared to obtain a combination of these materials using the co-precipitation method. FTIR spectra show a peak at 1341 cm−1, which depicts the Fe-O bending vibration. At peak 1558 cm−1 shows C = N streching. The top of 1412 cm−1 and 991 cm−1 extend the full ring. The sp2 aromatic peak may be seen at 1150 cm-1C-H bond. The surface area is 17.76 m2/g, and the pore size is 14.99 nm. Coercivity is 119.63 Oe, which shows a strong magnet. The highlight of the study was activated carbon from biomass waste candlenut shells (Aleurites moluccana) doped ZIF-67 supported Fe3O4 with specific capacitance shows high. The diffusion percentage shows fewer electrolyte ions entering the active material, and resistance also showed low results. It can increase the percentage of capacitive ions, thus improving the electrode. Electrochemical results show 1335F/g of high specific capacity at 1 A/g current density. It indicates a suitable candidate material for supercapacitor electrodes.

Keywords

• Activated carbon
• Candlenut shells
• Fe3O4
• Supercapacitor
• ZIF-67