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首页> 外文期刊>RSC Advances >Aloe vera assisted facile green synthesis of reduced graphene oxide for electrochemical and dye removal applications
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Aloe vera assisted facile green synthesis of reduced graphene oxide for electrochemical and dye removal applications

机译：芦荟辅助绿色还原氧化石墨烯的简便绿色合成，用于电化学和染料去除应用

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In the present work, the suitability of Aloe vera (AV) as a ‘green reducing agent’ has been investigated for the reduction of graphene oxide (GO). The extent of reduction was studied by varying the amount of AV. The physical and chemical properties of the GO and reduced graphene oxide (rGO) were investigated using UV-Vis spectrophotometry, FT-IR spectroscopy, High Resolution Transmission Electron Microscopy (HRTEM) and Selected Area Electron Diffraction (SAED). Partially reduced graphene oxide sheets obtained with 7.5 g of AV (rGO-7.5) demonstrated a maximum reduction efficiency of about 73% as evident from FT-IR data. Cyclic voltammetry and electrochemical impedance spectroscopy studies revealed a significant enhancement in current density and a decrease in charge transfer resistance for the rGO-7.5 sample. Moreover, the as prepared rGO-7.5 sample showed a remarkable dye removal ability with a maximum efficiency of ～98%. The enhanced surface area, π–π interaction and strong electrostatic attraction were correlated with the dye removal capability. The adsorption kinetics were also studied and pseudo second order adsorption phenomena were confirmed. The recyclability of the rGO-7.5 sample was further investigated and an excellent desorption capability was established.
机译：在目前的工作中，已经研究了芦荟（AV）作为“绿色还原剂”是否适合还原氧化石墨烯（GO）。通过改变AV的量来研究减少的程度。使用紫外可见分光光度法，傅立叶变换红外光谱，高分辨率透射电子显微镜（HRTEM）和选择区域电子衍射（SAED）研究了GO和还原氧化石墨烯（rGO）的物理和化学性质。从FT-IR数据可以明显看出，用7.5 g AV（rGO-7.5）得到的部分还原的氧化石墨烯片材的最大还原效率约为73％。循环伏安法和电化学阻抗谱研究表明，rGO-7.5样品的电流密度显着提高，电荷转移电阻降低。而且，所制备的rGO-7.5样品显示出显着的染料去除能力，最大效率为〜98％。表面积增加，π-π相互作用和强静电吸引力与染料去除能力相关。还研究了吸附动力学，并证实了伪二级吸附现象。进一步研究了rGO-7.5样品的可回收性，并建立了出色的脱附能力。

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