High surface wetting and conducting NiO/PANI nanocomposites as efficient electrode materials for supercapacitors

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

“…36,37,43 The KNO crests (Figure 3b) are at 571 cm À1 (stretching vibration bonds of Na-Ni-O), 1388 and 1572 cm À1 (H O H bending vibration bonds), and 2891, 3497, and 3782 cm À1 (O H stretching vibration). 59,64,65 The PANI/KNO nanocomposites (Figure 3) show the same characteristic peaks as present in PANI and KNO. FTIR crests of composites between 500 and 600 cm À1 (Na-Ni-O stretching vibration), 600 and650 cm À1 (C H out of plane bending vibration and para-distributed benzene rings), 1100 and 1200 cm À1 (C H bending vibration), 1300 and 1350 cm À1 ( N = QUINOID=N vibration mode, C N stretching vibration, and C C stretching vibration), 1600 and 1650 cm À1 (C O stretching vibration and H O H bending mode of vibration), 2950 and3300 cm À1 (O H stretching vibration and aromatic N H stretching vibration) and 3400 and 3500 cm À1 (N H stretching vibration).…”

“…36,[55][56][57] PANI (Figure 2a) broad peaks (characteristics peaks) were observed at 15.05 , 20.59 , and 25.25 (2θ angles) in accordance with already reported results. 37,38,40,58,59 The XRD micrograph of composites revealed the increased intensities of KNO peaks with an increased amount of KNO in PANI. The humps of PANI and peaks of KNO appeared in the XRD pattern of the respective composite (Figure 2) without any additional peaks, which confirmed the interfacial interaction between PANI and the respective KNO.…”

“…The thermogravimetric analysis (TGA) and first derivative thermogram of PANI, KNO, and PANI/KNO composites recorded from RT to 800 C, all showing three weight loss regions as shown in Figure 9. 43,59,76,77 KNO showed (i) first weight loss at 50 C because of water molecules evaporation, (ii) second weight loss from 262 to 550 C occurs because of impurities or adsorbent removal (iii) third weight loss from 550 C was because of thermal decomposition associated with oxygen loss, defects creation, and formation & enhancement of oxygen vacancy. 40,43,78 The final residual of KNO at 800 C is 92.60%, showing the most stable thermogram because KNO was calcinated at 400 C for 2 h, thus no hydroxide group was left.…”

“…Complex impedance (Z*) having frequency dependence properties of the real (Z 0 ) and imaginary (Z 00 ) parts of the impedance analysis for materials, 59,93,99 related as:…”

“…The ideal circuit of impedance measurement for Nyquist plots of composites consists of components as two resistors, one capacitor, and one constant phase element (CPE). 59,97,111,117 The EIS analyzer gave a circuit consisting of a series combination of two parallel combinations that are (i) capacitor and resistor and (ii) CPE and resistor (Figure 15b). CPE corresponds with the grain boundary properties exhibiting nonideal capacitive behavior that is a result of multiple relaxation processes present at the same relaxation time.…”