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The oil sorption behaviour investigation of Kapok (Ceiba pentandra (L.)) fiber

AIP Conference Proceedings 2024年第1期2925卷

作者： M. Afiq Daniel Raja Adibah Raja Ahmad R. Hussin M. Adam Bukhori Hamidon Z. Harun M. Z. Yunos A. R. Ainuddin Department of Mechanical Engineering Technology Faculty of Engineering Technology Universiti Tun Hussein Onn Malaysia Hub Pendidikan Pagoh KM 1 Jalan Panchor 84600 Panchor Johor Malaysia Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia Parit Raja Batu Pahat 86400 Johor Malaysia Integrated Material and Process Advanced Manufacturing & Materials Centre (AMMC) Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia Parit Raja 86400 Batu Pahat Johor Malaysia Nano Structure and Surface Modification (NanoSurf) Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Batu Pahat Johor Malaysia

As oil exploration and production activities have risen globally, water contamination from oil spills and the discharge of other oily wastewaters has emerged as one of the primary environmental concerns. Thus, Kapok fiber is considered in this study as it is known as one of the most effective method for cleaning up and collecting oil spills where Kapok is a natural cellulosic fiber with unique characteristics. A critical investigation was conducted to study the potential of kapok fiber as sorbent material, also analyze the surface properties of kapok fiber for the ability of kapok fiber to absorb oil and investigate the sorption mechanisms of kapok fiber. Therefore, the surface properties of kapok fiber were analyzed using SEM, FTIR, TGA and contact angle. To investigate the selectivity nature and the sorption capacity of 5 g kapok fiber, different types of oil and different apparent viscosity were used. The types of oil used are gear oil (low viscosity), vegetable oil-based cooking oil (medium viscosity) and waste oil (high viscosity). Kapok fiber was able to absorb all types of oil, with wasted oil absorbing the most about 17.88 g.g−1. Scanning electron microscopy (SEM) was used to examine the morphology of raw kapok fiber. In this study, kapok fiber was shown to have a porous hollow lumen structure and a waxy coating on the surface. Other than that, for the contact angle analysis, kapok fiber had high water contact angle up to 130˚. The water droplet was stood on the kapok fibers surfaces before and after absorption with contact angles ranging from 130˚ to 145˚. In contrast, the oil droplet had disappeared from the surfaces of kapok fiber within a few seconds.

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Erratum to “Development and characterizations of Ag nanoparticles decorated TiO2-ZrO2 coatings as electrode material for supercapacitors” [Results Surf. Interfaces 10 (2023) 100098]

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Results in Surfaces and Interfaces 2023年 12卷

作者： Sanu Mathew Simon Prakashan V.P. Sajna M.S. Anoop Chandran Gejo George Eric K. Barmiah Gin Jose Biju P.R. Cyriac Joseph Unnikrishnan N.V. School of Pure & Applied Physics Mahatma Gandhi University Kottayam 686 560 India Institute for Integrated Programmes and Research in Basic Sciences Mahatma Gandhi University Kottayam 686 560 India Department of Physics Sree Kerala Varma College Thrissur 680 011 India Centre for Advanced Materials Qatar University P.O. Box 2713 Qatar Department of Physics St. Cyril’s College Adoor India Department of Chemistry St. Berchman’s College Changanassery 686 101 India School of Chemical and Process Engineering University of Leeds Leeds LS2 9JT United Kingdom

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Publisher Correction: Kagomerization of transition metal monolayers induced by two-dimensional hexagonal boron nitride

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Nature communications 2024年第1期15卷 7413页

作者： Hangyu Zhou Manuel Dos Santos Dias Youguang Zhang Weisheng Zhao Samir Lounis Peter Grünberg Institut and Institute for Advanced Simulations Forschungszentrum Jülich & JARA 52425 Jülich Germany. h.zhou@fz-juelich.de. School of Electronic and Information Engineering Beihang University Beijing 100191 China. h.zhou@fz-juelich.de. Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University Beijing 100191 China. h.zhou@fz-juelich.de. Shenyuan Honors College Beihang University Beijing 100191 China. h.zhou@fz-juelich.de. Peter Grünberg Institut and Institute for Advanced Simulations Forschungszentrum Jülich & JARA 52425 Jülich Germany. Faculty of Physics University of Duisburg-Essen and CENIDE 47053 Duisburg Germany. Scientific Computing Department STFC Daresbury Laboratory Warrington WA4 4AD United Kingdom. School of Electronic and Information Engineering Beihang University Beijing 100191 China. Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University Beijing 100191 China. weisheng.zhao@***. Peter Grünberg Institut and Institute for Advanced Simulations Forschungszentrum Jülich & JARA 52425 Jülich Germany. s.lounis@fz-juelich.de. Faculty of Physics University of Duisburg-Essen and CENIDE 47053 Duisburg Germany. s.lounis@fz-juelich.de.

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Out-of-Plane Single-Copper-Site Catalysts for Room-Temperature Benzene Oxidation

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Angewandte Chemie 2024年第20期136卷

作者： Dr. Wei Che Dr. Pai Li Gao-Feng Han Dr. Hyuk-Jun Noh Dr. Jeong-Min Seo Jong-Pil Jeon Changqing Li Dr. Wei Liu Prof. Feng Li Prof. Qinghua Liu Prof. Jong-Beom Baek School of Energy and Chemical Engineering/Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea State Key Laboratory of Integrated Circuit Materials Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 P. R. China State Key Laboratory of Fine Chemicals Frontier Science Center for Smart Materials Department of Chemistry School of Chemical Engineering Dalian University of Technology Dalian 116024 P. R. China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200433 P. R. China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 Anhui P. R. China

Crafting single-atom catalysts (SACs) that possess “just right” modulated electronic and geometric structures, granting accessible active sites for direct room-temperature benzene oxidation is a coveted objective. However, achieving this goal remains a formidable challenge. Here, we introduce an innovative in situ phosphorus-immitting strategy using a new phosphorus source (phosphorus nitride, P 3 N 5 ) to construct the phosphorus-rich copper (Cu) SACs, designated as Cu/NPC. These catalysts feature locally protruding metal sites on a nitrogen (N)-phosphorus (P)-carbon (C) support (NPC). Rigorous analyses, including X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS), validate the coordinated bonding of nitrogen and phosphorus with atomically dispersed Cu sites on NPC. Crucially, systematic first-principles calculations, coupled with the climbing image nudged-elastic-band (CI-NEB) method, provide a comprehensive understanding of the structure-property-activity relationship of the distorted Cu−N 2 P 2 centers in Cu/NPC for selective oxidation of benzene to phenol production. Interestingly, Cu/NPC has shown more energetically favorable C−H bond activation compared to the benchmark Cu/NC SACs in the direct oxidation of benzene, resulting in outstanding benzene conversion (50.3 %) and phenol selectivity (99.3 %) at room temperature. Furthermore, Cu/NPC achieves a remarkable turnover frequency of 263 h −1 and mass-specific activity of 35.2 mmol g −1 h −1 , surpassing the state-of-the-art benzene-to-phenol conversion catalysts to date.

关键词： benzene hydroxylation electron localization geometric feature green chemistry single-atom catalysts

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Fine Pore-Structure engineering by Ligand Conformational Control of Naphthalene Diimide-Based Semiconducting Porous Coordination Polymers for Efficient Chemiresistive Gas Sensing

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Angewandte Chemie 2022年第2期135卷

作者： Dr. Ziqian Xue Dr. Jia-Jia Zheng Dr. Yusuke Nishiyama Dr. Ming-Shui Yao Dr. Yoshitaka Aoyama Zeyu Fan Dr. Ping Wang Prof. Takashi Kajiwara Prof. Yoshiki Kubota Prof. Satoshi Horike Prof. Ken-ichi Otake Prof. Susumu Kitagawa Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced StudyKyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and Technology of China Beijing 100190 China RIKEN-JEOL Collaboration Center Yokohama Kanagawa 230-0045 Japan JEOL Ltd. Musashino Akishima Tokyo 196-8558 Japan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Zhongguancun Beiertiao No. 1 Haidian Beijing 100190 China Department of Physics Graduate School of Science Osaka Metropolitan University 599-8531 Osaka Japan

Exploring new porous coordination polymers (PCPs) that have tunable structure and conductivity is attractive but remains challenging. Herein, fine pore structure engineering by ligand conformation control of naphthalene diimide (NDI)-based semiconducting PCPs with π stacking-dependent conductivity tunability is achieved. The π stacking distances and ligand conformation in these isoreticular PCPs were modulated by employing metal centers with different coordination geometries. As a result, three conjugated PCPs (Co−pyNDI, Ni−pyNDI, and Zn−pyNDI) with varying pore structure and conductivity were obtained. Their crystal structures were determined by three-dimensional electron diffraction. The through-space charge transfer and tunable pore structure in these PCPs result in modulated selectivity and sensitivity in gas sensing. Zn−pyNDI can serve as a room-temperature operable chemiresistive sensor selective to acetone.

关键词： PCPs/MOFs NDI Semiconductors Sensors 3D electron diffraction (3D ED)

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Innenrücktitelbild: integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals (Angew. Chem. 35/2023)

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Angewandte Chemie 2023年第35期135卷

作者： Prof. Ming-Shui Yao Prof. Ken-ichi Otake Jiajia Zheng Masahiko Tsujimoto Dr. Yi-Fan Gu Lu Zheng Dr. Ping Wang Dr. Shivanna Mohana Dr. Mickaele Bonneau Tomoyuki Koganezawa Tetsuo Honma Hirotaka Ashitani Shogo Kawaguchi Prof. Yoshiki Kubota Prof. Susumu Kitagawa Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced Study Kyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Zhongguancun Beiertiao No. 1 Haidian District Beijing 100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Chinese Academy of Sciences No.19(A) Yuquan Road Shijingshan District Beijing 100049 China College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University Siping Road 1239 Shanghai 200092 China Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo 679-5198 Japan Department of Physical Science Graduate School of Science Osaka Prefecture University Osaka Japan Department of Physics Graduate School of Science Osaka Metropolitan University Osaka Japan

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Inside Back Cover: integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals (Angew. Chem. Int. Ed. 35/2023)

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Angewandte Chemie International Edition 2023年第35期62卷

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integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals

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Angewandte Chemie 2023年第35期135卷

A one-stone, two-bird method to integrate the soft porosity and electrical properties of distinct metal–organic frameworks (MOFs) into a single material involves the design of conductive-on-insulating MOF ( c MOF-on- i MOF) heterostructures that allow for direct electrical control. Herein, we report the synthesis of c MOF-on- i MOF heterostructures using a seeded layer-by-layer method, in which the sorptive i MOF core is combined with chemiresistive c MOF shells. The resulting c MOF-on- i MOF heterostructures exhibit enhanced selective sorption of CO 2 compared to the pristine i MOF (298 K, 1 bar, S from 15.4 of ZIF-7 to 43.2–152.8). This enhancement is attributed to the porous interface formed by the hybridization of both frameworks at the molecular level. Furthermore, owing to the flexible structure of the i MOF core, the c MOF-on- i MOF heterostructures with semiconductive soft porous interfaces demonstrated high flexibility in sensing and electrical “shape memory” toward acetone and CO 2 . This behavior was observed through the guest-induced structural changes of the i MOF core, as revealed by the operando synchrotron grazing incidence wide-angle X-ray scattering measurements.

关键词： Conductivity Metal–Organic Frameworks Operando Shape Memory Soft Porosity

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