Nonenzymatic amperometric dopamine sensor based on a carbon ceramic electrode of type SiO2/C modified with Co3O4 nanoparticles

Recent Advances in Carbon-Silica Composites: Preparation, Properties, and Applications

“…Meanwhile, transition metals have also been employed as sensing materials due to their electroactivity. Abdur et al [117] developed an amperometric non-enzymatic dopamine sensor, which was based on the uniform dispersion of Co 3 O 4 nanoparticles in mesoporous carbon-silica composites synthesized using the sol-gel method. According to the results of the textural tests, the pore volume of the material was 0.98 cm 3 /g and the specific surface area reached 421 m 2 /g.…”

Hemin-doped metal–organic frameworks based nanozyme electrochemical sensor with high stability and sensitivity for dopamine detection

“… 1 Abnormal DA level is an indication of neurological disorders such as Parkinson's disease, senile dementia, and schizophrenia etc. 2 The detection and quantification of DA is very important for the diagnosis, monitoring, prevention and treatment of these neurological diseases. Therefore, sensitive and accurate analytical method for the detection of DA is essential in the clinical diagnosis of neurological diseases.…”

Graphene oxide quantum dots immobilized on mesoporous silica: preparation, characterization and electroanalytical application

“…25 Various materials have been used as working electrodes in such devices: conductive glasses, 26 screen-printing, 27 glassy carbon, 28 ceramic carbon, 29 and carbon paste. 30,31 To increase the electroactive area and facilitate the kinetics of the electrode/solution interface, the electrodes have usually been modied with metal/ metal oxide nanoparticles, 32,33 carbon nanotubes, 34 graphene or GO, 18,35 or with hybrid silica-based materials. 36 For example, it was found that the addition of mesoporous silica (SBA-15) to a carbon paste electrode (CPE) can considerably enhance its sensitivity toward diethylstilbestrol, 37 by as much as immobilization of graphene on glassy carbon electrode.…”