Hierarchical flower-like zinc oxide nanosheets in-situ growth on three-dimensional ferrocene-functionalized graphene framework for sensitive determination of epinephrine and its oxidation derivative

Fabrication of a polyoxotungstate/metal–organic framework/phosphorus-doped reduced graphene oxide nanohybrid modified glassy carbon electrode by electrochemical reduction and its electrochemical properties

“…The electroactive surface area was calculated by using following Randles Sevcik equation ( eqn (1) ). 86 i p = 2.69 × 10 5 n 3/2 AD 0 1/2 ν 1/2 C p1 where i p represents the anodic or cathodic peak current, n is the number of electrons transferred, A stands for the area of the electroactive surface (cm 2 ), D 0 denotes the diffusion co-efficient of [Fe(CN) 6 ] 3−/4− (7.6 × 10 −6 cm 2 s −1 ), ν symbolize the scan rate (V s −1 ), and C p represents the concentration of the probe solution ( M ). The electroactive surface area of PW 12 /MOF/P@ERGO/GCE is calculated to be 6.032 cm 2 , according to the calibration equation of i p = 2.239 ν 1/2 − 11.695 ( R 2 = 0.974) presented in Fig.…”

“…The electroactive surface area was calculated by using following Randles Sevcik equation (eqn (1)). 86 i p ¼ 2.69 Â 10 5 n 3/2 AD 0 1/2 n 1/2 C p1…”

The fabrication of a highly electroactive chiral-interface self-assembled Cu(ii)-coordinated binary-polysaccharide composite for the differential pulse voltammetry (DPV) detection of tryptophan isomers

“…Compared with CMC-Cu-CD/GCE, the distance between the oxidation and reduction peaks of rGO-PANI/CD-Cu-CMC/GCE is significantly decreased, which is attributed to the great electron transfer abilities of rGO-PANI. Herein, the electroactive areas of rGO-PANI/CD-Cu-CMC/GCE and the other electrodes can be calculated via the Randles–Sevcik equation: 55,56 I p = 2.69 × 10 5 n 3/2 AD 1/2 v 1/2 C where I p corresponds to the anodic peak current, n corresponds to the number of electrons transferred, A represents the area of the working electrode, v is the scan rate, and C corresponds to the concentration of [Fe(CN) 6 ] 4−/3− . D is the diffusion coefficient (7.6 × 10 −6 cm 2 S −1 ).…”

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

“…The research outcomes revealed that the doping elements change the ZnO structure. For example, doping elements decrease the crystallite size, increase the crystallinity, and modify the ZnO morphology [ 54 , 55 , 56 , 57 ]. The structural and morphological changes increase the surface-to-volume ratio, creating a more active center at the grain boundaries [ 58 ].…”