A simple, rapid and green method based on pulsed potentiostatic electrodeposition of reduced graphene oxide on glass carbon electrode for sensitive voltammetric detection of sophoridine

Direct electrodeposition of cationic pillar[6]arene-modified graphene oxide composite films and their host–guest inclusions for enhanced electrochemical performance

“…In more recent times, electrochemical reduction of GO to rGO has attracted considerable attention because it is regarded as a simple, fast and green method in addition graphene lm can be obtained by this method on conductive substrates. [18][19][20] More importantly, the high negative potential employed in the electrochemically reduced graphene oxide (ErGO) can efficiently reduce the oxygen-rich functional groups present on the GO surface. 21 Typically, the ErGO has usually been obtained through a two-step procedure comprising the immobilization of GO on the electrode surface by the chemical solution deposition methods, followed by the electrochemical reduction.…”

Differential Pulse Voltammetry Determination of Ofloxacin in Human Serum and Urine Based on a Novel Tryptophan‐graphene Oxide‐carbon Nanotube Electrochemical Sensor

“…The decrease of ΔE p at the CNT/GCE and GO/GCE could be attributed to the excellent electrical conductivity of CNT and GO presented on the electrode surface. The redox peak currents increase simultaneously, revealing the good electrocatalytic activity of CNT/GCE and GO/GCE . As for Trp‐GO‐CNT/GCE, a small increase of ΔE p (∼81 mV) could be observed (Figure a, curve D), possibly due to the hindered diffusion of Fe(CN) 6 3−/4− towards the electrode surface by inert electron and mass transfer blocking effects of the chemical attached Trp.…”

3D Graphene-Nitrogen Doped Carbon Nanotubes Network Modified Electrode as Sensing Materials for the Determination of Urapidil

“…On the other hand, the potentiostatic method (PM) can fabricate the 3D graphene network with a porous structure [ 32 ]. Recently, we reported that PPM can make uniform and crumpled reduced graphene sheets [ 29 , 30 ]. The reduced graphene sheets are nearly vertically aligned to the surface of the electrode.…”

“…Figure 7 A shows chronoamperometric curves of the 3DG-NCNTs modified GC electrode in the absence (curve a) and with 1.0 × 10 −4 mol L −1 urapidil (curve b). According to our previous report [ 30 ], the corresponding i cat / i L versus t 1/2 plot is presented and shown as the inset in Figure 7 A. From the slope of the straight line, the k cat is calculated to be 1.25 × 10 3 mol L −1 s −1 , which is much larger than that of the bare GC electrode (87.9 mol·L −1 ·s −1 ) and the 3DG network modified GC electrode (0.94 × 10 3 mol·L −1 ·s −1 ).…”

“…The cleaned GC electrode was immersed in GO-NCNTs dispersion, and electrodeposition was carried out by PPM under stirring. The parameters of electrodeposition were optimized according to our previous report [ 29 , 30 ] and listed as follows: anodic pulse duration t a , 0.7 s; cathodic pulse duration t c , 0.3 s; experimental time t exp , 150 s. At the same time, a 3DG modified GC electrode was also fabricated by a similar procedure in GO dispersion.…”