Preparation method of trace oxygen modified Pd-coated CNFs catalyst
A catalyst and trace oxygen technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of small specific surface area, metal leaching loss, etc., and achieve improvement Selectivity, enhanced ability to activate hydrogen, and improved loading effect
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Embodiment 1
[0037] 1. Pd@CNFs catalyst preparation
[0038] (1) Preparation of electrospun PAN nanofibers
[0039] Disperse 1 g of PAN in 10 mL of DMF o Stir at C for 12 h until the solution turns into a yellow transparent viscous liquid, and prepare an electrospinning solution. Then, the electrospinning solution was injected into a syringe with a 22-gauge stainless steel needle. The electrospinning operating conditions were set as follows: the working voltage was 14 kV, the syringe bolus was 1 mL / h, the translation distance was 60 mm, the receiver receiving distance was 15 cm, and the receiving speed was 80 rpm. Thus, a white PAN nanofiber membrane was prepared and cut into a 10*10cm sheet for use.
[0040] (2) Preparation of ZIF-L-Co / PAN nanofibers
[0041] The Co(NO 3 ) 2 ·6H 2 O-methanol solution (0.1 mol / L, 20 mL) was quickly poured into 2-methylimidazole-methanol solution (0.8 mol / L, 20 mL), at 30 o C, magnetic stirring at 100 rev / min for 60s to obtain ZIFs mother liquor. T...
Embodiment 2
[0067] (1) Preparation of electrospun PAN nanofibers
[0068] Disperse 0.8g PAN evenly in 10mL DMF, and put it at 60 o Stir at C for 12 h until the solution turns into a yellow transparent viscous liquid, and prepare an electrospinning solution. Then, the electrospinning solution was injected into a syringe with a 22-gauge stainless steel needle. The electrospinning operating conditions were set as follows: working voltage 13kV, syringe bolus 0.75mL / h, translation distance 100mm, receiver receiving distance 17cm, and receiving speed 100rpm. Thus, a white PAN nanofiber membrane was prepared and cut into a 10*10cm sheet for use.
[0069] (2) Preparation of ZIF-L-Co / PAN nanofibers
[0070] The Co(NO 3 ) 2 ·6H 2 O-methanol solution (0.05mol / L, 20mL) was quickly poured into 2-methylimidazole-methanol solution (0.24mol / L, 20mL), and at 40 o C, magnetic stirring at 80 rpm for 50 s. The trimmed PAN nanofiber membranes were then immersed in ZIFs mother solution for 8 h. After ...
Embodiment 3
[0079] (1) Preparation of electrospun PAN nanofibers
[0080] 1.4g PAN was uniformly dispersed in 10mL DMF, and the o Stir at C for 12 h until the solution turns into a yellow transparent viscous liquid, and prepare an electrospinning solution. Then, the electrospinning solution was injected into a syringe with a 21-gauge stainless steel needle. The electrospinning operating conditions were set as follows: working voltage 16 kV, syringe bolus 1.5 mL / h, translation distance 80 mm, receiver receiving distance 13 cm, and receiving speed 85 rpm. Thus, a white PAN nanofiber membrane was prepared and cut into a 10*10cm sheet for use.
[0081] (2) Preparation of ZIF-L-Co / PAN nanofibers
[0082] The Co(NO 3 ) 2 ·6H 2 The O-methanol solution (0.2mol / L, 20mL) was quickly poured into 2-methylimidazole-methanol solution (4.8mol / L, 20mL), and the solution was heated at 20 o C, magnetic stirring at 150 rpm for 80 s. The trimmed PAN nanofiber membranes were then immersed in ZIFs moth...
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