A method for preparing photocatalytic zno/ag composite nanofibers by electrospinning
A composite nanofiber, photocatalytic technology, applied in the directions of electrospinning, fiber processing, fiber chemical characteristics, etc., can solve the problems of ZnO photocatalytic efficiency reduction, easy compounding, etc., and achieve the effect of continuous preparation and low cost.
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Embodiment 1
[0015] (1) 0.6g PVP K90, 0.6g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 6g DMF, its volume was 6.2mL, and then 134μL was added to it with a concentration of 2mol L -1 AgNO 3 solution to obtain mixed solution A.
[0016] (2) Take A as the spinning solution, under the conditions of 30°C temperature and 20% humidity, control the spinning voltage to 29kV, the receiving distance to 12cm, and the feed rate to 1ml h -1 , to prepare precursor fibers by electrospinning.
[0017] (3) Place the precursor fibers in a blast drying oven, dry at 80 °C for 1 h, and then place them in a muffle furnace, at 1 °C min -1 The temperature was raised to 500°C at a certain rate, kept at a temperature of 4 hours, and then cooled to room temperature with the furnace to obtain ZnO / Ag composite nanofibers. See the SEM photo of figure 1 , XRD pattern see figure 2 .
[0018] (4) Take 10ml respectively and the concentration is 10mg·L -1 The methyl orange solution was placed in 4 reaction tubes, and 10 m...
Embodiment 2
[0021] (1) 6g PVP K90, 6g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 60g DMF, its volume was 62mL, and then 753μL was added to it with a concentration of 2mol L -1 AgNO 3 solution to obtain mixed solution A.
[0022] (2) Take A as the spinning solution, under the conditions of 30°C temperature and 20% humidity, control the spinning voltage to 29kV, the receiving distance to 12cm, and the feed rate to 1ml h -1 , to prepare precursor fibers by electrospinning.
[0023] (3) Place the precursor fibers in a blast drying oven, dry at 80 °C for 1 h, and then place them in a muffle furnace, at 1 °C min -1 The temperature was raised to 500°C at a certain rate, kept at a temperature of 4 hours, and then cooled to room temperature with the furnace to obtain ZnO / Ag composite nanofibers. See the SEM photo of Figure 5 .
[0024] (4) as described in implementation example 1 step (4), with the prepared ZnO / Ag as the photocatalyst, the light intensity is 5.1mW cm -2 A high-pressure mercury ...
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