High-sensitivity paracetamol sensor based on Pd/graphene oxide nanocomposite as an enhanced electrochemical sensing platform

Mesoporous chitosan/silica hybrid material applied for development of electrochemical sensor for paracetamol in presence of dopamine

“…As PR oxidation is a two electron process, the number of protons involved is two. Similar behavior was already reported by others [51,52]. The redox mechanism of PR on 1.0SiO 2 -CS/CuPc electrode surface in the pH range between 5 and 7 is shown in Scheme 1.…”

A carbon needle microelectrode decorated with TiO 2 nanosheets dominated by reactive facets as a highly electrocatalytic sensing element

“…The oxidation peak current of TiO 2 -CNE is 13.9 times as large as that of CNE, which may have resulted from the larger surface area-to-volume ratio and higher electrocatalytic activity of TiO 2 nanosheets with exposed (001) facets, leading to a large response [49]. The peak potential separation was 78 mV, which is considerably smaller than that of 318 mV at Pd/GO modified GCE [50], indicating the faster DET between the redox-active site of the AP molecule and CNE surface [51].…”

Bimetallic Ag-Pd nanoparticles-decorated graphene oxide: a fascinating three-dimensional nanohybrid as an efficient electrochemical sensing platform for vanillin determination

“…To obtain the Ag-Pd/GO hybrid, GO was first synthesized from natural graphite powders by a modified Hummers' method as mentioned in our previous publication [18,20], and then the as-synthesized GO was dispersed in ultrapure water at a concentration of 1.0 mg mL −1 with the aid of sonication for further use. For green and inexpensive chemical synthesis, polyethylene glycol was employed to reduce Pd 2+ and Ag 2+ in situ without employing any other surfactants and templates.…”

“…Moreover, Yuan et al [17] illustrated that a bimetallic Pd/Cu-decorated 3D graphene hydrogel showed significant electrocatalytic activity toward the glucose oxidation with a wide linear range up to 18 mmol dm −3 and a reproducible sensitivity of 48 µA (mg (mmol dm −3 )) −1 . In our previous reports [18,19], we have demonstrated that the monometallic Ag or Pd nanoparticles-supported graphene oxide (GO) exhibited favorable catalytic and detection performances. However, to the best of our knowledge, there are few reports on the 3D hybrids based on GO encapsulated Ag-Pd bimetallic nanoparticles for electrochemical sensing.…”