Facile Synthesis and Characterization of Cu₃(MoO₄)₂(OH)₂ Nanorods for High Performance Supercapacitor Electrode Application

Abstract

In the present study, Cu3(MoO4)2(OH)2 electrode materials were prepared by CTAB assisted hydrothermal method. Thermal, crystalline and bonding properties of freshly prepared samples were confirmed by thermo gravimetric analysis (TGA), x‐ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman analyses. The surface morphological features of Cu3(MoO4)2(OH)2 electrode materials were observed via Scanning electron microscopy (SEM) analysis. The concentration of cetyl trimethyl ammonium bromide (CTAB) template has much influenced in nanomaterial formation and the high concentration (3 mM) of CTAB provides nanorod structures. The electrochemical analysis of Cu3(MoO4)2(OH)2 electrodes were demonstrated via cyclic voltammetry (CV), chronopotentiometry (CP) and cyclic stability analyses. The electrochemical investigations of Cu3(MoO4)2(OH)2 electrode provide remarkable specific capacitance of 532 F g−1 at a scan rate of 5 mV s−1 and good cyclic stability of 98 % retention even after 5000 cycles at a scan rate of 20 mV s−1 with good rate capability. These outcomes prompted to assign a probable application for the synthesized Cu3( MoO4)2(OH)2 to utilize as a capable electrode material for supercapacitor applications.

Preparation and Characterization of Cu3(MoO4)2(OH)2 Nanosheets with Solar Photocatalytic Activity

“…It can be found that there are eight obvious Raman vibration bands at 289, 304, 342, 363, 405, 797, 841 and 930 cm À 1 , which is consistent with the location of vibration bands reported in the literatures. [36,37] The band at 289 cm À 1 mainly related to the lattice vibration modes and CuÀ O interactions. The vibration bands at 304, 342, 363 and 405 cm À 1 are caused by symmetrical and asymmetric bending vibrations of OÀ Mo-O within the MoO 4 tetrahedral.…”

“…The vibration bands at 797 and 841 cm À 1 corresponds to the symmetry and asymmetric stretching vibration of MoÀ O within the MoO 4 tetrahedral, respectively. [36] And the vibration peak at 930 cm À 1 corresponds to the Mo=O symmetrical tensile vibration mode. [37] Figure S3b shows the FTIR spectrum of the sample monoclinic Cu 3 (MoO 4 ) 2 (OH) 2 nanosheets.…”

“…[37,38] The peak at 771 cm À 1 is due to the presence of a pyramid structure in Cu 3 [MoO 4 ] 2 O crystal. [36] In order to confirm the elemental composition and surface electronic structure of the sample Cu 3 (MoO 4 ) 2 (OH) 2 nanosheets, X-ray photoelectron spectroscopy (XPS) analysis was performed, and the results are shown in Figure 6. It can be seen from the survey spectrum of the Cu 3 (MoO 4 ) 2 (OH) 2 sample that the sample contains three elements: Cu, Mo and O, and the C element shown in the full spectrum, it can be considered that the sample was contaminated by foreign objects during the test (Figure 6a).…”