通过Aldol反应合成了四种新型吸电子/供电子基团-氧化石墨烯-氧化多壁碳纳米管(EWG/EDG-GO-o-MWCNTs)纳米复合材料。将 EWG 和 EDG 成功接枝到 GO-o-MWCNTs 上,通过傅里叶变换红外光谱 (FT-IR) 和元素分析 (EDX) 对其进行了研究。通过电化学测试和静态吸附实验研究了EWG和EDG对GOπ体系尺寸的影响。EDG-GO-o-MWCNTs的电荷转移电阻(RCT)显着小于电化学阻抗谱(EIS)的EWG-GO-o-MWCNTs,这表明EDG增强了GO的π系统的电子密度,增加了GO 的电子密度,提高了 GO 的电子转移速率。EWG消除了GO的π系统的电子密度,这导致电子转移减慢。静态吸附表明呋塞米具有不同的吸附容量 (2, 4DMOA-GO-o-MWCNTs (26.16 μg/mL) > 3, 4, 5TFPh-GO-o-MWCNTs (22.61 μg/mL) > 4MPh-GO-o -MWCNTs (18.30 μg/mL) > 4AcPh-GO-o-MWCNTs (10.66 μg/mL) > GO (4.39 μg/mL))。结果表明,EWG/EDG-GO-o-MWCNTs 纳米复合材料可以通过氢键和 π-π 相互作用轻松吸附呋塞米。电化学测试和静态吸附实验表明,EWG和EDG可以改变GO的π体系。39 μg/mL))。结果表明,EWG/EDG-GO-o-MWCNTs 纳米复合材料可以通过氢键和 π-π 相互作用轻松吸附呋塞米。电化学测试和静态吸附实验表明,EWG和EDG可以改变GO的π体系。39 μg/mL))。结果表明,EWG/EDG-GO-o-MWCNTs 纳米复合材料可以通过氢键和 π-π 相互作用轻松吸附呋塞米。电化学测试和静态吸附实验表明,EWG和EDG可以改变GO的π体系。
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Electron-withdrawing/donating groups (EWG/EDG) modified graphene oxide-oxidized-multiwalled carbon nanotubes and these performances in electrochemistry and adsorption
Four novel electron-withdrawing/donating groups-graphene-oxide-oxidized-multiwalled carbon nanotubes (EWG/EDG-GO-o-MWCNTs) nanocomposites were synthesized via Aldol reaction. The EWG and EDG were successfully grafted onto GO-o-MWCNTs, which were investigated by fourier transform infrared spectroscopy (FT-IR) and element analysis (EDX). The effect of EWG and EDG on the size of the π system of GO was investigated by electrochemical test and static adsorption experiment. The charge transfer resistance (RCT) of EDG-GO-o-MWCNTs was significantly smaller than EWG-GO-o-MWCNTs from electrochemical impedance spectroscopy (EIS), which indicated that EDG enhanced the electron density to the π system of GO, increased the electron density of GO and improved the electron transfer rate of GO. EWG eliminated the electron density of the π system of GO, which resulted in the slowed down of electron transfer. The static adsorption showed the different adsorption capacities for furosemide (2, 4DMOA-GO-o-MWCNTs (26.16 μg/mL) > 3, 4, 5TFPh-GO-o-MWCNTs (22.61 μg/mL) > 4MPh-GO-o-MWCNTs (18.30 μg/mL) > 4AcPh-GO-o-MWCNTs (10.66 μg/mL) > GO (4.39 μg/mL)). The results indicated that EWG/EDG-GO-o-MWCNTs nanocomposites could easily adsorb furosemide by hydrogen bonding and π-π interactions. Electrochemical tests and static adsorption experiment indicated that the π system of GO could be changed by EWG and EDG.