Alem Asab Fetene, Worku Ababay Ketema, Ayele Delele Worku, Habtu Nigus Gabbiye, Ambaw Mehary Dagnew, Yemata Temesgen Atnafu
Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia.
Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia.
Heliyon. 2023 Feb 17;9(3):e13817. doi: 10.1016/j.heliyon.2023.e13817. eCollection 2023 Mar.
Through co-precipitation and post-heat processing, nanostructured Fe-doped CoO nanoparticles (NPs) were developed. Using the SEM, XRD, BET, FTIR, TGA/DTA, UV-Vis, and techniques were examined. The XRD analysis presented that CoO and CoO nanoparticles that had been doped with 0.25 M Fe formed single cubic phase CoO NPs with average crystallite sizes of 19.37 nm and 14.09 nm, respectively. The as prepared NPs have porous architectures via SEM analyses. The BET surface areas of CoO and 0.25 M Fe-doped CoO NPs were 53.06 m/g and 351.56 m/g, respectively. CoO NPs have a band gap energy of 2.96 eV and an extra sub-band gap energy of 1.95 eV. Fe-doped CoO NPs were also found to have band gap energies between 2.54 and 1.46 eV. FTIR spectroscopy was used to determine whether M-O bonds (M = Co, Fe) were present. The doping impact of iron results in the doped CoO samples having better thermal characteristics. The highest specific capacitance was achieved using 0.25 M Fe-doped CoO NPs at 5 mV/s, which corresponding to 588.5 F/g via CV analysis. Additionally, 0.25 M Fe-doped CoO NPs had energy and power densities of 9.17 W h/kg and 472.1 W/kg, correspondingly.
通过共沉淀和后热处理，制备了纳米结构的铁掺杂氧化钴纳米颗粒（NPs）。使用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、比表面积分析仪（BET）、傅里叶变换红外光谱仪（FTIR）、热重/差示热分析仪（TGA/DTA）、紫外可见分光光度计（UV-Vis）等技术对其进行了检测。XRD分析表明，掺杂0.25 M铁的CoO和CoO纳米颗粒分别形成了平均晶粒尺寸为19.37 nm和14.09 nm的单立方相CoO NPs。通过SEM分析可知，所制备的NPs具有多孔结构。CoO和0.25 M铁掺杂CoO NPs的BET比表面积分别为53.06 m²/g和351.56 m²/g。CoO NPs的带隙能量为2.96 eV，额外的子带隙能量为1.95 eV。还发现铁掺杂CoO NPs的带隙能量在2.54至1.46 eV之间。FTIR光谱用于确定是否存在M-O键（M = Co，Fe）。铁的掺杂影响使得掺杂的CoO样品具有更好的热特性。在5 mV/s下，使用0.25 M铁掺杂CoO NPs获得了最高比电容，通过循环伏安（CV）分析，其对应于588.5 F/g。此外，0.25 M铁掺杂CoO NPs的能量密度和功率密度分别为9.17 W h/kg和472.1 W/kg。
