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In this work, N‐doped hollow porous carbon spheres (N‐HPCSs) were synthesized by silicon dioxide template‐assisted polybenzoxazine (PB) coating strategy. The prepared N‐HPCSs have a smooth hollow ball structure surrounded by a well‐defined porous shell. Combining with in‐situ plating of Bi film, the N‐HPCSs were further fabricated a sensitive electrochemical platform for determination trace levels...
A new voltammetric sensor for matrine was fabricated via the polymerization of L‐cysteine on graphene oxide, which served as templates. The fabricated electrode can improve the oxidation of matrine intensively, and enable the determination of matrine in the range from 4×10−6 to 1×10−4 mol L−1, with a detection limit of 2×10−6 mol L−1. The oxidation process of matrine was studied and some dynamic parameters...
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