Manufacturing method for nanoscale zero-valent iron
A nano-zero-valent iron, a preparation process technology, applied in the field of environmental pollution control and chemical synthesis, can solve the problems of difficult control, small particle size of zero-valent iron, and reduced reactivity, so as to facilitate sampling analysis, convenient access, and avoid Effects of reduced or lost activity
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[0012] Example 1
[0013] Such as figure 1 As shown, the device is placed on a magnetic stirrer, the sealing lid is opened, and 0.7993g FeSO 4 ·7H 2 O, 40mL of distilled water and 0.05g of polyethylene glycol are added to the reaction chamber, and then the sealing cap is sealed with the reaction chamber through the frosted surface interface, the air inlet device, namely the gas pipeline interface, is installed, and the gas pipeline interface is connected to the nitrogen bottle, and open The gas flow control valve continuously introduces nitrogen gas and exhausts it through the exhaust device to replace the air in the reaction chamber. Under vigorous stirring, add dilute HNO through the constant pressure separating funnel of the reaction liquid dropping device 3 Adjust pH=3 0.1mol / L NaBH 4 The solution is 200 mL, and the dripping rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel. The chemical synthesis reaction of nano...
Example Embodiment
[0014] Example 2
[0015] Such as figure 1 As shown, the device was placed on a magnetic stirrer, the sealing lid was opened, and 0.7993g FeSO 4 ·7H 2 O, 40mL distilled water, 1.0g molecular sieve and 0.05g polyethylene glycol were added to the reaction chamber, and then the sealing cap was sealed with the reaction chamber through the frosted surface interface, the air inlet device, namely the gas pipeline interface, was installed, and the gas pipeline interface was connected to the nitrogen bottle Connect, open the gas flow control valve, continuously introduce nitrogen, and exhaust it through the exhaust device to replace the air in the reaction chamber. Under vigorous stirring, add dilute HNO through the constant pressure separating funnel of the reaction liquid dropping device 3 Adjust pH=3 0.1mol / L NaBH 4 The solution is 200mL, and the dripping rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel, and the chemical s...
Example Embodiment
[0016] Example 3
[0017] Such as figure 1 As shown, the device is placed on a magnetic stirrer, the sealing lid is opened, and 0.4996g FeSO 4 ·7H 2 O, 40mL distilled water and 0.05g polyethylene glycol were added to the reaction chamber, and then the sealing cap was sealed with the reaction chamber through the frosted surface interface, and then the gas inlet device, namely the gas pipe interface, was installed, and the gas pipe interface was connected to the nitrogen bottle, and opened The gas flow control valve continuously introduces nitrogen gas and exhausts it through the exhaust device to replace the air in the reaction chamber. Under vigorous stirring, add dilute HNO through the constant pressure separating funnel of the reaction liquid dropping device 3 Adjust pH=3 0.1mol / L NaBH 4 The solution is 200 mL, and the dripping rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel. The chemical synthesis reaction of nan...
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