Article
Physics, Multidisciplinary
Siqi Shan, Yequan Chen, Yongda Chen, Wenzhuo Zhuang, Ruxin Liu, Xu Zhang, Rong Zhang, Xuefeng Wang
Summary: We present a universal approach to transfer freestanding La0.7Sr0.3MnO3 membranes onto target substrates. The transferred 4-unit-cell-thick membranes demonstrate enhanced ferromagnetism, conductivity, and out-of-plane magnetic anisotropy, overcoming the nonmagnetic/antiferromagnetic and insulating behavior induced by intrinsic epitaxial strain. This work enables promising applications of ultrathin freestanding correlated oxide membranes in electronics and spintronics.
Article
Chemistry, Physical
Jie Shen, Yichen Cai, Chenhui Zhang, Wan Wei, Cailing Chen, Lingmei Liu, Kuiwei Yang, Yinchang Ma, Yingge Wang, Chien-Chih Tseng, Jui-Han Fu, Xinglong Dong, Jiaqiang Li, Xi-Xiang Zhang, Lain-Jong Li, Jianwen Jiang, Ingo Pinnau, Vincent Tung, Yu Han
Summary: Carbon nanomaterials like graphene have interesting molecular transport properties, but achieving regular channels over a large area requires perfect alignment. In this study, we developed a large-area two-dimensional conjugated-polymer-framework with regular pore distribution, resulting in 99.5% salt rejection by forward osmosis. The design and fabrication of these membranes provide a promising route for developing carbon-based membranes for precise molecular separation.
Article
Materials Science, Multidisciplinary
Md Saidul Islam, Hitomi Ohmagari, Mohammad Atiqur Rahman, Yuta Shudo, Masahiro Fukuda, Junya Yagyu, Yoshihiro Sekine, Leonard F. Lindoy, Shinya Hayami
Summary: The study found that unreduced GO/CNT membranes exhibit good thermoelectric properties, suitable for use as flexible thermoelectric materials. Compared to traditional thermoelectric materials, the inherent flexibility of GO-based thermoelectric materials could lead to improved performance and efficiency.
MATERIALS ADVANCES
(2021)
Article
Engineering, Chemical
Tobias Foller, Xinyue Wen, Yee Yee Khine, Dali Ji, Tarakranjan Gupta, Matthew Muller, Cristina Scret, Rakesh Joshi
Summary: This study demonstrates that graphene oxide (GO) membranes can remove chlor(am-)ine from tap water, with permeate chlor(am-)ine concentration of < 0.1 ppm regardless of feed concentrations. Both flat sheet and hollow fibre GO membranes effectively filter out chlor(am-)ine over days of continuous operation, with the hollow fibre membranes offering easy scalability. This highlights the filtration properties of GO membranes and their potential as next-generation membrane technology.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Vanesa Quintano, Alessandro Kovtun, Fabio Biscarini, Fabiola Liscio, Andrea Liscio, Vincenzo Palermo
Summary: By triggering with an electric bias, we demonstrated ion transport on graphene oxide membranes (GOMs) at the centimeter scale, as well as the aggregation of selected ions in salt crystals within the GOM channels. This highlights the difference between the chemical environment in the 2D channels and in bulk solutions.
NANOSCALE ADVANCES
(2021)
Article
Engineering, Chemical
Shi Yuan, Yang Li, Ruosang Qiu, Yun Xia, Cordelia Selomulya, Xiwang Zhang
Summary: Reduced graphene oxide (rGO) membranes are widely used for desalination and ionic sieving applications, but they often suffer from low permeability due to high transport resistance. This study shows that non-selective defects in ultrathin rGO membranes can be effectively minimized by surface-deposition of graphene quantum dots (GQDs), resulting in a good balance between water permeance and NaCl rejection. This work provides new insights into designing high quality ultrathin 2D laminar membranes for various separation applications.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Zhenyang Han, Xiao Xiao, Huaijiao Qu, Menglei Hu, Christian Au, Ardo Nashalian, Xiao Xiao, Yanxin Wang, Liu Yang, Fengchun Jia, Tianmei Wang, Zhi Ye, Peyman Servati, Linjun Huang, Zhijun Zhu, Jianguo Tang, Jun Chen
Summary: Researchers reported an embedded graphene oxide membrane with unzipped carbon nanotubes (CNTs) that have wide applicability in molecular separation and water purification techniques. The study investigated the effects of different bandwidths of unzipped CNTs on their properties and prepared four composite membranes with varying bandwidths through a vacuum-assisted filtration process. One of the membranes exhibited good stability in different pH solutions and showed increased water permeability with the increase of inserted CNT's bandwidth.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Yuqing Sun, Dean Xu, Shilong Li, Lele Cui, Yongxiang Zhuang, Weihong Xing, Wenheng Jing
Summary: The multidimensional MXene-carbon nanotube (CNT) ultrathin membranes were successfully assembled by loading a MXene intercalated with CNTs onto a tubular ceramic membrane, which considerably improved the permeability and rejection performance of the membranes. The membranes exhibited a distinct suppressed swelling property via a facile thermal crosslinking process and showed promising anti-swelling property and stability in long-term operation studies. This assembly and thermal crosslinking strategy represents a new avenue for developing high-performance membranes for water purification based on MXene and other 2D materials.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Su Liu, Xin Tong, Lei Huang, Chengchao Xiao, Kaihang Zhang, Yongsheng Chen, John Crittenden
Summary: Utilizing graphene oxide membranes with improved selectivity, lithium-ion extraction and recovery from unconventional aqueous sources can be achieved. By incorporating sulfonate groups into the membrane matrices, the selectivity of lithium over other monovalent ions is enhanced, allowing for concentration and recovery of lithium from solutions containing competing ions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Changhong Wang, Ruizhi Yu, Hui Duan, Qingwen Lu, Qizheng Li, Keegan R. Adair, Danni Bao, Yang Liu, Rong Yang, Jiantao Wang, Shangqian Zhao, Huan Huang, Xueliang Sun
Summary: This study successfully fabricated representative SE membranes with thin thickness and high room-temperature ionic conductivity using PTFE fibrilization technology. The all-solid-state pouch cells prepared with this technology exhibited high capacity and cycling stability.
ACS ENERGY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Roman M. Wyss, Markus Parzefall, Karl-Philipp Schlichting, Cynthia M. Gruber, Sebastian Busschaert, Carin Rae Lightner, Emanuel Lortscher, Lukas Novotny, Sebastian Heeg
Summary: This study introduces freestanding porous gold membranes as reliable and effective substrates for surface-enhanced Raman spectroscopy (SERS). The membranes exhibit mechanical stability under pressure and show surface-enhanced Raman scattering with high enhancement factors. Numerical simulations reveal that individual nanoscale pores in the membrane act as optical slot antennas.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Faizal Soyekwo, Changkun Liu, Wei Huang, Hao Wen
Summary: Research on the structural stability and high permeability of membranes based on 2D materials is important for separation membranes. Anti-swelling approaches have been explored to mitigate the instability caused by aqueous-induced swelling, and 2D lamellar membranes with ion selective capabilities have been developed. The modified graphene oxide membranes exhibit durability against swelling in aqueous media, showcasing high water fluxes and effective ion permeation rates for selective separation of organic contaminants.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Engineering, Environmental
Jian Ye, Yi Wang, Zhanguo Li, Dayi Yang, Chunxiang Li, Yongsheng Yan, Jiangdong Dai
Summary: Introducing membrane filtration into advanced oxidation processes for environmental remediation shows promising potential. The fabricated FeCo@GCTs/GO composite membrane exhibited excellent performance in degrading pollutants and could be a new direction for wastewater purification.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Jiawei Liu, Zhen Wang, Wenwen Li, Xuliang Wang, Yanlei Su
Summary: This work reported a significant improvement of nanofiltration (NF) membranes for desalination with high separation performance. The graphene quantum dots (GQDs) enhanced polyamide (PA) composite membranes (GPA) consisted of porous substrates and nanofilms. The nanofilms, fabricated by support-free interfacial polymerization, had an ultrathin thickness below 8.0 nm. The synergistic strategy of GQDs regulation on PA nanofilm structure and arginine post-treatment modification may provide a reliable and efficient technique for the design of NF membranes.
Article
Multidisciplinary Sciences
Muchun Liu, Paula J. Weston, Robert H. Hurt
Summary: The utilization of van der Waals gaps in layered materials as nanofluidic channels has sparked great interest. An approach using compressive instability in Zr-doped GO thin films is demonstrated to rotate nanosheets to high angles, creating wrinkle patterns that result in near-vertically aligned nanochannels. These robust nanofluidic devices significantly reduce fluid path-length while maintaining high selectivity for water over non-polar molecules characteristic of GO interlayer nanochannels.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Chansol Kim, Kyeong Min Cho, Kangho Park, Kyoung Hwan Kim, Issam Gereige, Hee-Tae Jung
Article
Nanoscience & Nanotechnology
Mihye Wu, Ju Ye Kim, Hyunsoo Park, Do Youb Kim, Kyeong Min Cho, Eunsoo Lim, Oh B. Chae, Sungho Choi, Yongku Kang, Jihan Kim, Hee-Tae Jung
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Kyeong Min Cho, Yujin So, Seung Eun Choi, Ohchan Kwon, Hyunjin Park, Jong Chan Won, Hanim Kim, Hee-Tae Jung, Yun Ho Kim, Dae Woo Kim
Article
Chemistry, Physical
Ju Ye Kim, Woonghyeon Park, Changhyeok Choi, Gukbo Kim, Kyeong Min Cho, Jinkyu Lim, Seon Joon Kim, Ahmed Al-Saggaf, Issam Gereige, Hyunjoo Lee, Woo-Bin Jung, Yousung Jung, Hee-Tae Jung
Summary: The study successfully synthesized a wrinkled Cu catalyst with high facets using graphene as a guiding material, achieving high ethanol selectivity and productivity. The unique atomic arrangement of the wrinkled Cu film, particularly the (310) facet, played a key role in facilitating ethanol production with a low C-C coupling barrier and preferred reaction path.
Article
Chemistry, Multidisciplinary
Chansol Kim, Kyeong Min Cho, Kangho Park, Ju Ye Kim, Geun-Tae Yun, Francesca M. Toma, Issam Gereige, Hee-Tae Jung
Summary: The study introduced a novel porous Cu/Cu2O aerogel network to achieve high ethanol productivity by electrocatalytic CO2RR, showing promising potential for ethanol production. Experimental results demonstrated that the aerogel produced ethanol as the major product and exhibited excellent electrosynthesis performance.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Jaeheon Lee, Dongwon Ka, Heesoo Jung, Kyeongmin Cho, Youngho Jin, Minkun Kim
Summary: In this study, UiO-66-NH2/zeolite-templated carbon composites with high specific surface areas and broad pore size distributions were synthesized for the adsorption and decomposition of nerve agents. Among the composites, U(0.8)Z(0.2) showed the best degradation performance and protection against the nerve agents due to the additional adsorption and degradation sites provided by beta-ZTC. The results highlight the optimal composition of U(0.8)Z(0.2) for utilizing the degradation performance of pristine UiO-66-NH2 and the adsorption performance of pristine beta-ZTC.
Article
Chemistry, Physical
Claudio Adrian Ruiz-Torres, Junhyeok Kang, Kyoung Min Kang, Kyeong Min Cho, Yoon Tae Nam, Chan Byon, Yoon-Young Chang, Dae Woo Kim, Hee-Tae Jung
Summary: Two-dimensional materials-based membranes show promise for nanofiltration applications due to their ultrafast permeance and effective molecular sieving. However, assessing the long-term filtration performance remains challenging, as observed in the case of an ultrafast graphene oxide membrane. The membrane exhibited high permeance for various solvents, but experienced significant flux and rejection rate decline during filtration of dye solutions, likely due to concentration polarization and cake formation.
Article
Multidisciplinary Sciences
Ji-Yoon Song, Chansol Kim, Minki Kim, Kyeong Min Cho, Issam Gereige, Woo-Bin Jung, Hyeonsu Jeong, Hee-Tae Jung
Summary: The research developed a method for creating high surface coverage nanoparticles using cellulose defect sites, successfully fabricating Cu NPs with high surface coverage and polyelemental alloy NPs, demonstrating high selectivity and stability in electrochemical CO2 reduction reaction.
Article
Nanoscience & Nanotechnology
Jaeheon Lee, Jinah Seo, Kyeong Min Cho, Jiwoong Heo, Heesoo Jung, Sohyeon Park, Jaekyung Bae, Sangmin Lee, Jinkee Hong, Min-Kun Kim, Youngho Jin
Summary: In this study, a water vapor-permeable polyacrylonitrile membrane was prepared via electrospinning, which can prevent aerosol penetration and adsorb chemical and biological warfare agents, exhibiting high performance and processability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Moonhyun Choi, Sohyeon Park, Woojin Choi, Youna Kim, Kyeong Min Cho, Jiwoong Heo, Min-Kun Kim, Heesoo Jung, Youngho Jin, Sangmin Lee, Jinkee Hong
Summary: This study presents the design and fabrication of an in-and-out coating material for modifying porous activated carbon fabric (ACF) to improve oil-water separation efficiency and bactericidal properties. The fabricated coating exhibited excellent hydrophobic properties, anti-scratch performance, oil-water separation performance, and bacterial penetration blocking efficiency.
Article
Nanoscience & Nanotechnology
Kyubo Kim, Heesoo Jung, Kyeong Min Cho
Summary: A hybrid membrane combining an oxygen-rich small-flake graphene oxide layer with a continuous and thin zeolitic imidazolate framework (ZIF-8) layer was successfully developed in this study. This membrane is highly breathable and selectively permeable, and it effectively separates chemicals while permitting water vapor to pass through. It shows promising potential for use in next-generation personal protective equipment with enhanced comfort and functionality.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Kyubo Kim, Heesoo Jung, Kyeong Min Cho
Summary: In this study, a hybrid membrane consisting of a continuous and thin zeolitic imidazolate framework (ZIF)-8 layer on an oxygen-rich small-flake graphene oxide layer was developed. The membrane demonstrated high selectivity for water vapor over nerve agent simulants, with a high water vapor transmittance rate. This protective barrier layer shows promise for next-generation protective clothing with enhanced comfort and operability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hyunsook Jung, Jihyun Kwon, Heesoo Jung, Kyeong Min Cho, Seung Jung Yu, Sang Myeon Lee, Mingyu Jeon, Sung Gap Im
Summary: In this study, a copolymeric coating with short-chain fluorinated groups was synthesized and directly coated onto a textile fabric via initiated chemical vapor deposition. The coating shows excellent nonwetting ability against hazardous chemical warfare agents and retains its performance even after abrasion and exposure to harsh chemicals.
Article
Chemistry, Physical
Kyeong Min Cho, Woo-Bin Jung, Donggyu Kim, Ju Ye Kim, Yesol Kim, Geun-Tae Yun, Seunghwa Ryu, Ahmed Al-Saggaf, Issam Gereige, Hee-Tae Jung
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Multidisciplinary
Mihye Wu, Do Youb Kim, Hyunsoo Park, Kyeong Min Cho, Ju Ye Kim, Seon Joon Kim, Sungho Choi, Yongku Kang, Jihan Kim, Hee-Tae Jung
