A method of attenuating the oxidation of metal nanoparticles
A technology of metal nanoparticles and polymers, applied in the direction of coating, etc., can solve the problem of weakening the oxidation of metal nanoparticles, and achieve the effects of easy realization, prevention of agglomeration, and weakening of oxidation
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Embodiment 1
[0020] 1% APAM, CPAM, NPAM, PAA, PEG and 200 mL deionized water were added to five beakers, and the G value was 800 s -1 Stir, then add 5 mg / L nanometer zero-valent iron, continue to stir and react for 2 h, after the reaction is completed, centrifuge to separate the solid matter in the suspension, and the supernatant is filtered through a 0.45 um filter membrane and then passed through an inductively coupled plasma emission spectrometer (ICP -Agilent720ES) to measure the concentration of iron ions in the supernatant ( figure 1 ), while the underlying solid matter was reserved for determination of XRD characterization ( figure 2 ). It can be seen from Table 1 that among different types of polyacrylamide, the concentration of supernatant iron ions in the APAM mixed solution is the smallest, indicating that the corrosion degree of nano-zero-valent iron is low, but there is no corrosion of nano-zero-valent iron in polyacrylamide solution To the greatest extent, the concentratio...
Embodiment 2
[0022] Add APAM, CPAM, NPAM, PAA and PEG with a mass fraction of 1% in five beakers containing sodium borohydride solutions, and gradually add the sodium borohydride solution containing polymer electro-organic electrolytes to the three beakers with a peristaltic pump. In ferric chloride solution, the value of G is 800 s -1 Stir, continue to stir and react for 30 min after the dropwise addition, let stand and centrifuge to separate the solid matter in the suspension, and make the solid matter into a suspension of 5 g / L, at room temperature with a G value of 800 s -1 Stir the reaction for 10 min, and centrifuge to separate the solid matter for XRD characterization ( image 3 ). From image 3 It can be seen that in the absence of polymer electrolytes, the ratio of the peak value of the formed iron oxide to the peak value of zero-valent iron increases significantly after the nano-zero-valent iron reacts with the aqueous solution for 10 min, while in the presence of polymer elect...
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