Simultaneous detection of hydroquinone and catechol by Cu/Bi-MOF-derived Cu/Bi@C nanocomposites

Principle of electrochemical sensor: under the action of Cu/Bi@C, HQ and CC molecules interact with nitrogen and oxygen atoms and are oxidised to 1,4-benzoquinone and 1,2-benzoquinone, releasing two electrons and protons at the same time.