| Autor: |
Rahaman S; Centre for Nano and Soft Matter Sciences (CeNS), Shivanapura, Bangalore 562162, India. kavitapandey@cens.res.in., Raza A; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com., Lone AR; Centre for Nano and Soft Matter Sciences (CeNS), Shivanapura, Bangalore 562162, India. kavitapandey@cens.res.in., Muaz M; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com., Zaidi SH; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com., Adeeb MA; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com., Sama F; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com.; Department of Industrial Chemistry, Aligarh Muslim University, Aligarh 202002, India., Pandey K; Centre for Nano and Soft Matter Sciences (CeNS), Shivanapura, Bangalore 562162, India. kavitapandey@cens.res.in., Ahmad A; Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India. farashasamachem@gmail.com. |
| Abstrakt: |
This work presents an innovative and environmentally friendly biological synthesis approach for producing α-Fe 2 O 3 nanoparticles (NPs) and the successful synthesis of α-Fe 2 O 3 /reduced graphene oxide (rGO) nanocomposites (NCs). This novel synthesis route utilizes freshly extracted albumin, serving as both a reducing agent and a stabilizing agent, rendering it eco-friendly, cost-effective, and sustainable. A combination of characterization techniques including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and field emission scanning electron microscopy (FE-SEM) was employed to predict and confirm the formation of the as-synthesized α-Fe 2 O 3 NPs and α-Fe 2 O 3 /rGO NCs. Transmission electron microscopy (TEM) verified the anisotropic nature of the synthesized nanoparticles. To gain insight into the enhanced capacitance of the α-Fe 2 O 3 /rGO NCs, a series of electrochemical tests, namely cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), electrochemical impedance spectroscopy (EIS), and stability assessments, were conducted in a conventional three-electrode configuration. Furthermore, a two-electrode asymmetric supercapacitor (ASC) device was fabricated to assess the practical viability of this material. The α-Fe 2 O 3 /rGO NCs exhibited a remarkable potential window of 2 V in an aqueous electrolyte, coupled with exceptional cycling stability. Even after undergoing 10 000 cycles, the capacitive retention exceeded 100%, underlining the promising potential of this material for advanced energy storage applications. |
