Bi2O3@MWCNT@g-C3N4 ternary nanocomposite for the efficient electrochemical determination of Riboflavin in pharmaceutical samples.

Herein, we present a novel ternary nanocomposite Bi 2 O 3 @MWCNT@g-C 3 N 4 decorated glassy carbon electrode (GCE) for electrochemical detection of Riboflavin (RF). The electrocatalyst Bi 2 O 3 @MWCNT@g-C 3 N 4 was prepared by a simple route; given by ultrasonicated the mixture of Bi 2 O 3 , MWCNT and g-C 3 N 4 in a single pot and then refluxing it to 80 °C. The as-synthesized electrocatalyst showed improved and impressive electrochemical performance due to the synergistic effect of g-C 3 N 4 , MWCNT, and Bi 2 O 3. Additionally, the electrocatalytic response of the prepared Bi 2 O 3 @MWCNT@g-C 3 N 4 /GCE towards RF determination was examined using Cyclic voltammetry (CV) and linear sweep voltammetry (LSV). It has been depicted that in comparison to other prepared materials the Bi 2 O 3 @MWCNT@g-C 3 N 4 /GCE exhibited an impressive electrocatalytic response towards the determination of RF, within a broad linear range (0.02–70 μM) having lower detection limit (1.032 μM). Furthermore, the Bi 2 O 3 @MWCNT@g-C 3 N 4 /GCE also offered improved stability, anti-inference ability, remarkable repeatability and good sensitivity. Finally, the prepared electrocatalyst showed satisfactory results in the real sample analysis of three different pharmaceutical samples containing RF namely Neurobion forte, Supradyn daily and Becosules capsules. [Display omitted] • Bi 2 O 3 @MWCNT@g-C 3 N 4 as a new ternary nanocomposite was synthesized. • Bi 2 O 3 @MWCNT@g-C 3 N 4 modified GCE for Riboflavin electrochemical monitoring. • An impressive linear concentration range and low limit of detection for Riboflavin. [ABSTRACT FROM AUTHOR]