Papers by Author: Chang Ju

Abstract: A novel reagentless H₂O₂ biosensor based on ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF₆) functionalized nano-gold as the biocompatible interface of Cytochrome C (Cyt c) by self-assembled method was proposed. The immobilized Cyt c showed direct electrochemistry and displayed an excellent electrocatalytic response to the reduction of H₂O₂ without the aid of any electron mediator. Under optimal experimental conditions, the as-prepared biosensor showed a wide linear response to H₂O₂ in the range of 0.23 µM to 3.0 mM with a detection limit of 0.12 µM (S/N = 3). The resulting biosensor can reached 95% of steady-state current within 5 s. The K^app_m value for H₂O₂ was found to be 1.2 mM.

Abstract: Magnetically separable copper phthalocyanine/Fe₃O₄ (CuPc/Fe₃O₄) core–shell nano- composites were prepared by an organic-inorganic complexation technique, which could effectively catalyze photodegradation of the model pollutant methylene blue (MB), using hydrogen peroxide as oxidant under visible light irradiation. Moreover, the as-prepared functional nanocomposites could be easily separated from the photodegradation system by using an external magnetic field, which still kept high photocatalytic activity after 5 time’s continual utilization.