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A novel sensor for sensitive determination of hydroquinone (HQ) and catechol (CC) was proposed using a Fe3O4 microspheres‐graphene oxide (Fe3O4‐GO) composites modified glassy carbon electrode (GCE) which was further encapsulated with chitosan (Chit‐Fe3O4‐GO/GCE). The excellent electrocatalytic performance is probably related to the strong synergistic effect of the composites. The proposed sensor shows...
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