“…[22] The graphene-based nanomaterials have found their way into various technological applications such as fuel cells, [23] batteries/capacitors, [24,25] sensor studies, [26][27][28][29][30][31][32][33][34] nanocatalyzer, [35] electronic devices, [36] food, [37] and medicine studies. [38] Recently, electrochemically [39][40][41] or self-ordered [42] modified electrodes [43][44][45][46] are very popular because of its remarkable properties such as high sensitivity, [47][48][49][50][51] simplicity, [52] low cost, and ease. [53] In this study, we developed a different method to determine both Cd (II) and Bi (III) at the same time.…”