Huang Wenyan, Komarneni Sridhar, Gorski Christopher, Noh Young Dong, Doroski April, Dong Yan, Ma Jianfeng, Griffin Aron M, Yang Dongjiang, Xue Xiaoqiang, Yang Hongjun, Jiang Bibiao
Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China.
Materials Research Institute and Department of Ecosystem Science and Management, Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
ACS Appl Mater Interfaces. 2020 Mar 4;12(9):11171-11179. doi: 10.1021/acsami.9b20420. Epub 2020 Feb 19.
Here, we coined the term "clayene" for a single layer of clay and "few-layer clayene" for clays with 2-10 layers. Few-layer clayenes, which are Fe-rich and mica-type, were prepared hydrothermally at 200 °C and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM)/high-resolution transmission electron microscopy (HRTEM) to determine the crystalline phases and morphology, respectively. Chemical composition by energy-dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy confirmed the iron-rich mica composition, and the latter also revealed the presence of both Fe and Fe. Mössbauer spectroscopy further confirmed the presence of Fe and Fe and their proportions in the mica-type few-layer clayenes. All of the synthesized mica-type few-layer clayenes except one exhibited high specific surface areas (SSAs) ranging from 94 to 149 m/g as determined by N adsorption-desorption isotherms and the Brunauer-Emmett-Teller (BET) equation. The high surface areas are in conformity with the crystal sizes calculated from XRD peaks and also as revealed by HRTEM. Taking advantage of the interfacial reactions of the high surface area of few-layer clayenes, two potential applications of clayenes were demonstrated in materials and environmental fields.
在此，我们将单层黏土称为“黏土烯”，将具有2至10层的黏土称为“少层黏土烯”。通过水热法在200°C制备了富含铁的云母型少层黏土烯，并分别用X射线衍射（XRD）和扫描电子显微镜（SEM）/高分辨率透射电子显微镜（HRTEM）对其进行表征，以确定其晶相和形态。通过能量色散光谱（EDS）和X射线光电子能谱确定了其化学成分，证实了富含铁的云母成分，后者还揭示了Fe和Fe的存在。穆斯堡尔光谱进一步证实了云母型少层黏土烯中Fe和Fe的存在及其比例。除一种外，所有合成的云母型少层黏土烯通过N吸附-脱附等温线和布鲁诺尔-埃米特-泰勒（BET）方程测定，均表现出94至149 m²/g的高比表面积（SSA）。高表面积与根据XRD峰计算的晶体尺寸一致，HRTEM也显示了这一点。利用少层黏土烯高表面积的界面反应，在材料和环境领域展示了黏土烯的两种潜在应用。
