Voltammetric determination of 4-nitrophenol using a modified carbon paste electrode based on a new synthetic crown ether/silver nanoparticles

A novel modified carbon-paste electrode (CPE) with a new synthetic ligand: 6,7,9,10,17,18,19, 20,21, 22-decahydrodibenzo[h,r][1,4,7,11,15]trioxadiazacyclonanodecine-16,23dione(DTD)/Ag nanoparticles (AgNP) was employed for 4-nitrophenol measurement in natural water. Various parameters such as pH, modifier, accumulation time and scan rate were optimized. The proposed electrode showed a good response towards 4-nitrophenol determination. Under the optimized conditions the reduction peak current, showed a good linear relationship with the nitrophenol concentration in the range comprised between 1 × 10− 6 mol L− 1 and 1 × 10− 4 mol L− 1. The developed electrode was successfully applied for the determination of 4-nitrophenol in water samples.

► A novel modified carbon-paste electrode (CPE) with a new synthetic ligand: 6,7,9,10,17,18,19,20,21,22-23decahydrodibenzo[h,r][1,4,7,11,15]trioxadiazacyclonanodecine- 16,23dione (DTD)/Ag nanoparticles (AgNP) exhibited high electrocatalytic activitiy towards the determination of 4-NP.
► The peak potential shifts positively from –0.83V in unmodified CPE to –0.77V in DTD modified CPE but in the case of DTD/Ag NP modified electrode, it changes from –0.83V to –0.64 V.
► The developed electrode was successfully applied for the determination of 4-nitrophenol in water samples.