In view of the low photocatalytic activity of Cu2O,the difficulty of recycling and the poor reuse of powder photocatalyst,NFC/PAN photocatalytic fiber is prepared by electrospin-ning.By introducing a layered double hydroxide that can contain anions in its interlayer,Cu2 O is modified by NiFe-LDH and loaded on PAN fiber.The testing methods are used to evaluate the effect of different amount of Ni3Fe1-LDH@Cu2O on the properties of photocatalytic fibers,such as scanning electron microscope,energy spectrometer,universal testing machine,UV-VIS absorption spectroscopy,etc.It is pointed out that Ni3 Fe1-LDH@Cu2O/PAN with 5％NFC mass percentage has the best degradation effect on methylene blue after 60 min of visible light irradi-ation,reaching 91.7％,with a specific surface area of 76.3 cm2/g,showing certain mechanical st-ability.The degradation rate is still above 85％after repeated use for five times.Moreover,the photocatalytic effect of 5％Ni3Fe1-LDH@Cu2O/PAN can achieve high efficiency in a short time,and the degradation rate constant of the photocatalytic fiber is the highest,which is 0.022 6,and the tensile breaking strength is increased by 3.35 times.
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