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Fe3O4@SiO2-NH2-CMC magnetic nanoparticles(MNPs) could be prepared by covalent modification method via the modification of sodium carboxymethyl cellulose (CMC). IR spectra could be used for the determination of Fe3O4@SiO2-NH2, Fe3O4@SiO2-NH2-CMC, Fe3O4@SiO2-NH2-CMC/MOF5, and Fe3O4@SiO2-NH2-CMC/IRMOF3 nanoparticles. The results showed that the polysaccharide modification and core-shell modification were successful. Knoevenagel condensation experiments exhibited that, as forFe3O4@SiO2-NH2-CMC/IRMOF3, the best conversion rate could be obtained. 相似文献
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SWCNTs-PEG-NH2, SWCNTs-2,3-NH2 and SWCNTs-3,4-NH2 nanoparticles could beprepared by covalent modification method of single-walled carbon nanotubes(SWCNTs). The structure ofSWCNTs-PEG-NH2, SWCNTs-2,3-NH2 and SWCNTs-3,4-NH2 nanoparticles could be determined byXPS(X-ray photoelectron spectroscopy). The results showed that the amidation reactions were successful.Ciprofloxacin(CIP) extraction experiments exhibited that, as for SWCNTs-PEG-NH2, the best adsorptioncould be obtained at pH=4 and pH=6, while elution conditions of 0.1mol/L NaOH and 1% SDS couldachieve better elution effect. As for SWCNTs-2,3-NH 2 and SWCNTs-3,4-NH2 , the best adsorption couldbe obtained at pH=6, while the elution condition of 1% SDS could achieve the best elution effect. The addition of Al3+ions could sensitize the fluorescence of ciprofloxacin. 相似文献
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将γ-Fe2O3作为底物,利用硅酸四乙酯制备出了γ-Fe2O3@SiO2纳米粒子,通过硅烷偶联剂制得了γ-Fe2O3@SiO2-NH2纳米粒子,通过共价修饰利用戊二酸酐合成了γ-Fe2O3@SiO2-NH2-COOH纳米粒子.进而通过Zr-MOFs核壳修饰得到合成的γ-Fe2O3@SiO2-NH2-COOH/Zr-MOFs(包括γ-Fe2O3@SiO2-NH2-COOH/UiO-66,γ-Fe2O3@SiO2-NH2-COOH/UiO-66-NH... 相似文献
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通过不同的修饰方法制备了以γ-Fe2O3为核的四种氨基化的磁性纳米材料分别为γ-Fe2O3@SiO2-cysteamine, γ-Fe2O3@SiO2-PEI, γ-Fe2O3@SiO2-G1.0, γ-Fe2O3@SiO2-APTMS.在吸附时间为0.5, 1, 2,4, 8 h, p H=3, 5, 7, 9, 11的条件下,通过磁固相萃取的方法吸附浓度为2.5×10-6 mol/L的苯丙氨酸,随后用荧光分光光度计检测上清液的荧光强度,荧光强度越低说明纳米材料的吸附效果越优秀.通过试验后发现γ-Fe2O3@SiO2-G1.0磁性纳米粒子在p H=5,吸附时间为8 h的条件下的吸附性最好. γ-Fe2 相似文献
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