Selective Thallium (I)‎ Ion Sensor Based on Functionalised ZnO Nanorods

Abstract EN

Well controlled in length and highly aligned ZnO nanorods were grown on the gold-coated glass substrate by hydrothermal growth method.

ZnO nanorods were functionalised with selective thallium (I) ion ionophore dibenzyldiaza-18-crown-6 (DBzDA18C6).

The thallium ion sensor showed wide linear potentiometric response to thallium (I) ion concentrations (1×10−7 M to 5×10−2 M) with high sensitivity of 36.87 ± 1.49 mV/decade.

Moreover, thallium (I) ion demonstrated fast response time of less than 5 s, high selectivity, reproducibility, storage stability, and negligible response to common interferents.

The proposed thallium (I) ion-sensor electrode was also used as an indicator electrode in the potentiometric titration, and it has shown good stoichiometric response for the determination of thallium (I) ion.