Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer a...Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer and multilayer films on pre-modified gold electrode. The performance of this modified electrode was studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV curve indicates that modified electrode 3(Ag-MPA)/2PDDA/4-ATP/Au was more active and steady than the others, and the EIS implies that the electrochemical impedance increased. The CV current of multilayer modified electrode was obviously higher than monolayer modified electrode in 0.5 mmol·L-1 K3 Fe(CN)6 solution.展开更多
MgO nanobelts were successfully synthesized via a co-precipitation synthetic way by employing ammonia and salvolatile as co-precipitator. TEM characterization showed that these nanobelts were composed of uniform hexag...MgO nanobelts were successfully synthesized via a co-precipitation synthetic way by employing ammonia and salvolatile as co-precipitator. TEM characterization showed that these nanobelts were composed of uniform hexagonal shaped MgO nanocrystals. The formation of this new-type nanostructures was attributed to the crystal structures of the MgCO3·3H2O precursor. TG was adopted to show the gradual conversion process of from MgCO3·3H2O to MgO. Due to the large surface areas and the largely exposed (100) surfaces, these nanobelts may find their applications in catalysis fields.展开更多
文摘Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer and multilayer films on pre-modified gold electrode. The performance of this modified electrode was studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV curve indicates that modified electrode 3(Ag-MPA)/2PDDA/4-ATP/Au was more active and steady than the others, and the EIS implies that the electrochemical impedance increased. The CV current of multilayer modified electrode was obviously higher than monolayer modified electrode in 0.5 mmol·L-1 K3 Fe(CN)6 solution.
文摘MgO nanobelts were successfully synthesized via a co-precipitation synthetic way by employing ammonia and salvolatile as co-precipitator. TEM characterization showed that these nanobelts were composed of uniform hexagonal shaped MgO nanocrystals. The formation of this new-type nanostructures was attributed to the crystal structures of the MgCO3·3H2O precursor. TG was adopted to show the gradual conversion process of from MgCO3·3H2O to MgO. Due to the large surface areas and the largely exposed (100) surfaces, these nanobelts may find their applications in catalysis fields.
