journal article·2020-03-04

Few-Layer Clayenes for Material and Environmental Applications

Wenyan Huang, Sridhar Komarneni, Christopher Gorski, Young Dong Noh, April Doroski, Yan Dong, Jianfeng Ma, Aron M. Griffin, Dongjiang Yang, Xiaoqiang Xue, Hongjun Yang, Bibiao Jiang

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Abstract

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 Fe2+-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 Fe2+ and Fe3+. Mössbauer spectroscopy further confirmed the presence of Fe2+ and Fe3+ 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 m2/g as determined by N2 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.
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Research context

OpenAlex topics: Clay minerals and soil interactions · Polymer Nanocomposites and Properties · Recycling and utilization of industrial and municipal waste in materials production

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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

Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

School of Environment and Safety Engineering, Changzhou University, Changzhou 213164, China

School of Environmental Science and Engineering, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China

Funding

College of Agricultural Sciences, Pennsylvania State University · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Top-notch Academic Programs Project of Jiangsu Higher Education Institutions · Natural Science Foundation of Jiangsu Higher Education Institutions

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