The role silica pore structure plays in the performance of modified carbon paste electrodes

Magnetic Mesoporous Silica for Targeted Drug Delivery of Chloroquine: Synthesis, Characterization, and In Vitro Evaluation

“…The synthesis of mesoporous silica containing iron oxide was based on previously reported syntheses for MCM-41 silica [ 28 , 29 ]. The surfactant CTAB (1.2 g, 3.3 mmol) was dissolved in water (120 mL) at 50 °C.…”

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

“…As discussed earlier, the integration of mesoporous silica into a graphite paste electrode can enhance its electrochemical response due to areal enlargement of the electroactive sites over the electrode surface. 36 It seems that immobilisation of GOQDs on the silica surface can further enhance such a response thanks to the amplied affinity of the resulting modied electrode to the analytes. The higher affinity of CPE/SiO 2 -GOQDs towards the analytes reveals itself in a decrease in the oxidation potential of the analytes on 65-155 mV, compared with CPE.…”

“…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. 38 Application of GOQDs as an individual modier, as well as part of a hybrid material is under intensive electrochemical study.…”

2-Mercaptopyrimidine-functionalized mesostructured silicas to develop electrochemical sensors for a rapid control of scopolamine in tea and herbal tea infusions

“…The SBA-15-MPY material showed the lower reversibility, because it presented the Ipa/Ipc less closed to 1 and the higher ΔEp value. This fact can be attributed to the large pore wall thickness of SBA-15-MPY in relation to the other materials (Table 1), which could increase the resistance for electron transfer [27].…”