School of Chemical Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China E-mail:
Henan Key Laboratory of Green Manufacturing of Biobased Chemicals, Puyang, Henan 457000, China.
Water Sci Technol. 2022 Feb;85(4):1202-1217. doi: 10.2166/wst.2022.029.
A green and facile pathway was described using Viburnum odoratissimum leaf extract in the presence of sodium thiosulfate for the synthesis of sulfidated iron oxide nanocomposites (S-Fe NCs) adsorbents. The prepared S-Fe NCs can be used for the efficient removal of Malachite Green (MG) and Rhodamine B (RhB) from aqueous solution. Analytical techniques by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) were applied to understand the morphologies and compositions of S-Fe NCs. The stability of the adsorption capacity on S-Fe NCs was studied. Results from the characterization studies showed that S-Fe NCs were mainly composed of iron oxides, iron sulfides and biomolecules. The S-Fe NCs displayed high adsorption capacity for a wide range of pH values. The Koble-Corrigan isotherm model and Elovich model well described the adsorption process. The maximum adsorption capacity for MG and RhB was 4.31 mmol g and 2.88 mmol g at 303 K, respectively. The adsorption mechanism may be attributed to the electrostatic interaction, the hydrogen bonding, the π-π stacking interactions, the inner-sphere surface complexation or the cation bridging among the S-Fe NCs and dye molecules.
采用水栒子叶提取物在硫代硫酸钠存在下合成了硫化铁纳米复合材料（S-Fe NCs）吸附剂，描述了一种绿色简便的途径。所制备的 S-Fe NCs 可用于从水溶液中有效去除孔雀石绿（MG）和罗丹明 B（RhB）。通过扫描电子显微镜（SEM）、能谱（EDS）、透射电子显微镜（TEM）、X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）等分析技术，研究了 S-Fe NCs 的形貌和组成。研究了吸附容量对 S-Fe NCs 的稳定性。表征研究结果表明，S-Fe NCs 主要由氧化铁、硫化铁和生物分子组成。S-Fe NCs 在很宽的 pH 值范围内表现出高吸附容量。Koble-Corrigan 吸附等温线模型和 Elovich 模型很好地描述了吸附过程。在 303 K 时，MG 和 RhB 的最大吸附容量分别为 4.31 mmol g 和 2.88 mmol g。吸附机制可能归因于 S-Fe NCs 与染料分子之间的静电相互作用、氢键、π-π 堆积相互作用、内球表面络合或阳离子桥接。
