Article
Chemistry, Multidisciplinary
M. M. Sk, P. Pradhan, B. K. Patra, A. K. Guria
Summary: Electrical double-layer capacitors (EDLCs) could be an alternative solution to meet the increasing demand for power in electric cars and digital electronic devices. The high power density of EDLCs is achieved through the use of porous electrodes that provide a large accessible surface area for ions. Currently, porous carbon-based electrodes are widely used due to their high specific surface area, good electronic conductivity, and reasonable cost. The electrochemical properties of EDLCs are closely related to the chemical and physical properties of carbon materials, particularly activated carbon (AC) is an important electrode material in EDLC applications. The production of AC from inexpensive natural bio-precursors, such as crops and plants, has attracted research interest.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Electrochemistry
Anis Allagui, Mohammed E. Fouda
Summary: This study explores the computation of capacitance from time-domain data, utilizing definitions of capacitance and frequency-domain data analysis. Experimental results demonstrate the effectiveness of the capacitance calculation method in different scenarios.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Songming Yang, Youer Deng, Shiqi Zhou
Summary: The aim of this paper is to investigate the possible use of the dipole dimer water model in describing the electrical double layer capacitor capacitance behaviors. It is confirmed that the dipole dimer water model enables the reproduction of various experimental phenomena, such as the negative correlation between capacitance and temperature, insensitivity to electrolyte concentration, and the shape of the capacitance-voltage curve. The paper emphasizes the indispensable role of the electric dipole in reproducing the confirmed capacitance behaviors and highlights the potential of the dipole dimer water model.
Article
Chemistry, Multidisciplinary
Ju-Hwan Kim, Hye-Min Lee, Sang-Chul Jung, Dong-Chul Chung, Byung-Joo Kim
Summary: A mesoporous activated carbon (PB-AC) was prepared from bamboo, with modifications using phosphoric acid and steam activation to tune the crystal structure and pore characteristics. The PB-AC exhibited high specific surface area and mesopore-rich nature, making it a suitable electrode material for EDLCs.
Review
Chemistry, Physical
Jinjue Zeng, Chenyang Xu, Tian Gao, Xiangfen Jiang, Xue-Bin Wang
Summary: This review discusses the integration of two-dimensional nanosheets into three-dimensional porous monoliths, creating 3D graphene structures that prevent aggregation or restacking of individual graphene sheets and provide pathways for electron/phonon transport and mass transfer. The synthesis methodology and applications of 3D graphene for electric double-layer capacitors are highlighted, along with current challenges and future prospects for manufacturing and application.
Article
Chemistry, Multidisciplinary
Keiko Ideta, Doo-Won Kim, Taegon Kim, Koji Nakabayashi, Jin Miyawaki, Joo-Il Park, Seong-Ho Yoon
Summary: The study investigated the effect of pore size on the response characteristic of an electric double layer capacitor (EDLC), and found that samples with the largest pore size showed superior capacitance and response frequency characteristics. The presence of micropores and mesopores in the activated carbon facilitated low electrolyte-diffusion resistance during the formation of the electric double layer, leading to fast and stable response frequency.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Hyeonji Jang, Yeon Hu Park, Min-Ha Kim, Jungmok You, Jae-Heung Ko, Jung Tae Lee
Summary: Studies have shown that by altering the chemical composition of biomass, it is possible to increase the surface area and oxygen functional groups of porous carbon materials, thereby improving their electrochemical performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Byoung-Min Lee, Beom-Seok Choi, Jang-Yong Lee, Sung-Kwon Hong, Jung-Soo Lee, Jae-Hak Choi
Summary: A facile and template-free strategy was developed to prepare activated porous carbon beads (APCBs) with enhanced pore properties. The APCBs exhibited a large specific surface area and pore area, leading to a good specific capacitance and excellent capacitance retention for electrode applications in electric double-layer capacitors.
Article
Chemistry, Multidisciplinary
Quanzhou Du, Yuhua Zhao, Kelei Zhuo, Yujuan Chen, Lifang Yang, Chunfeng Wang, Jianji Wang
Summary: This study presents a pre-assembly strategy to prepare three-dimensional hierarchical porous carbons as electrode materials for supercapacitors, aiming to investigate the effects of pore volume, pore size, and ratio of mesopores to micropores on the performance of ionic liquid-based supercapacitors. The prepared HPCs exhibit excellent specific capacity and energy density, making them promising materials for high-performance supercapacitors.
Article
Chemistry, Applied
Nisa V. Salim, Xing Jin, Srikanth Mateti, Karamat Subhani
Summary: The study successfully prepared carbon fibers with hierarchical porous designs, high conductivity, and large surface area, showing promising potential for multifunctional applications such as capacitors and adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
He Xu, Yi Zhang, Liyuan Wang, Ye Chen, Shuyan Gao
Summary: A porous carbon framework with optimized structure exhibits outstanding electrochemical performance, high specific capacitance and energy density, as well as excellent capacitance retention after cycles. The relationship between structure optimization and performance enhancement of carbon materials is deeply explored, providing effective guidance for synthesizing high-performance porous biomass-derived carbon materials for supercapacitors.
Article
Energy & Fuels
Karsimran Singh, Raj Kumar, Amarjeet Kaur
Summary: In this study, citrus limetta pulp-derived activated carbon electrodes were used in high-performance symmetric electrical double-layer capacitors. Different amounts of activating agent (KHCO3) were used to activate dried leftover limetta pulp, resulting in various activated carbons. The structure and porosity of the synthesized activated carbons were characterized, and it was found that adding NH4+-salt significantly improved the electrochemical properties of the gel polymer electrolyte system.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Paper & Wood
Xiaodan Yuan, Liwen Xu, Jubing Zhang, Yun Dai, Juguang Meng, Xinye Wang, Changsheng Bu, Changqi Liu, Hao Xie
Summary: In this study, nitrogen self-doped hierarchical porous carbon was synthesized for electrical double-layer capacitors. The carbonization process of bean dregs-based tar with potassium acetate as the template agent was used to control the pore structure and composition. The resulting porous carbons exhibited high specific surface area and unique hierarchical architecture, with the best sample showing excellent specific capacitance and high surface area.
Article
Materials Science, Multidisciplinary
Meng Zhou, Sheng-Xue Yan, Qing Wang, Ming-Xiu Tan, Deng-Yang Wang, Zi-Qi Yu, Shao-Hua Luo, Ya-Hui Zhang, Xin Liu
Summary: This study presents a green method to prepare porous active carbon from walnut septum as electrode materials for supercapacitors. The effects of chemical etching reagent on the microstructure and specific capacitance of the porous carbon are explored. The results show that walnut septum is a promising precursor for activated carbons, and the large mesoporosity after activation effectively boosts the electrochemical properties of supercapacitors.
Article
Chemistry, Physical
Qi-Qi Zhuang, Jing-Pei Cao, Yan Wu, Xiao-Yan Zhao, Yu-Lei Wei, Zhi-Hui Yang, Zhi Zhou, Zi-Meng He, Yun-Peng Zhao, Hong-Cun Bai
Summary: A novel type of oxygen-enriched three-dimensional porous carbons (3DPCs) was prepared using coal tar pitch (CTP) and NaCl as raw materials, showing interconnected 3D structure with large effective specific surface area and high oxygen content. The 3DPCs exhibited the largest specific capacitance and superior cycling stability in 6 M KOH electrolyte, as well as high energy density in EMIMBF4 electrolyte, providing an effective way for the synthesis of 3DPCs and contributing to the development of high value-added carbon materials industry based on CTP.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Sang Jin Kim, Byong Chol Bai, Min Il Kim, Young-Seak Lee
Article
Chemistry, Multidisciplinary
Kyung Hoon Kim, Jong Hoon Cho, Jin Ung Hwang, Ji Sun Im, Young-Seak Lee
Summary: This study introduces a semi-ionic C-F bond on the surface of graphite to enhance the cycling stability of lithium-ion batteries by forming a stable LiF-based solid electrolyte interphase (SEI) layer on the anode. The semi-ionic C-F bond improved the formation of a stable SEI layer and decreased side reactions with HF, resulting in excellent long-term cycling stability. Additionally, the anode with semi-ionic C-F bonds exhibited a lower volume expansion compared to pristine anodes, highlighting the effectiveness of this approach.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Donghae An, Kyung Hoon Kim, Chaehun Lim, Young-Seak Lee
Summary: The influence of process variables in kneading and carbonization/graphitization on the properties of carbon block was systematically studied, optimizing kneading temperature and heat treatment temperature to achieve high fluidity and structural evolution of the carbon block.
Article
Chemistry, Multidisciplinary
Daesup Kim, Kyung Hoon Kim, Chaehun Lim, Young-Seak Lee
Summary: The study found that carbon coating treatment on silicon oxide can improve its performance as an anode material for lithium-ion batteries. Among the carbon-coated SiOx anodes, SiOx@C 200 exhibits the highest reversible capacity and shows good performance under high C-rates and cycling.
Article
Chemistry, Multidisciplinary
Chaehun Lim, Yoonyoung Ko, Cheol Hwan Kwak, Seokjin Kim, Young-Seak Lee
Summary: Polyvinylidene fluoride (PVDF) has attracted much attention as an effective additive for mesophase production in recent years. This study discusses the changes in properties of pitches obtained with different amounts of added PVDF and the influence of PVDF decomposition on mesophase formation. The results show that PVDF is an effective additive for mesophase pitch production.
Article
Chemistry, Multidisciplinary
Chaehun Lim, Cheol Hwan Kwak, Seo Gyeong Jeong, Daesup Kim, Young-Seak Lee
Summary: Nitrogen plasma surface treatment of activated carbon can simultaneously control microporosity and surface functionality, improving CO2 adsorption capacity and selectivity.
Article
Chemistry, Multidisciplinary
Seokjin Kim, Chaehun Lim, Cheol Hwan Kwak, Daesup Kim, Seongmin Ha, Young-Seak Lee
Summary: In this study, direct fluorination was used to make the surface of an amphiphilic melamine sponge (MS) hydrophobic. The fluorinated MS (F-MS) showed excellent oil absorption capacity, recyclability, and long-term stability, making it a very promising absorbent for separation purification in industrial applications.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Chemical
Sangmin Park, Junghoon Yang, Hye-Min Lee, Young-Seak Lee, Yoon Kyeung Lee, Yasuhiro Yamada, Nodo Lee, Jungpil Kim
Summary: CO2 separation from CO2/CH4 and CO2/H2 mixtures is crucial for H2 production from biogas. Amine-functionalized carbon materials show promising CO2 adsorption performance, but the impact of amine edge positions needs clarification. In this study, the adsorption abilities of 19 graphene nanoflakes (GNFs) with two amines at different edge positions were evaluated. All structures exhibited superior CO2 adsorption compared to CH4 and H2. The CO2 adsorption in GNFs with isolated amines was influenced by charge transfer, while GNFs with adjacent amines showed stronger hydrogen bonding. The presence of methyl groups on the nitrogen hindered CO2 adsorption, and the interaction between amines and CO2 was affected by the presence of H2O.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Kyung-Soo Kim, Cheol-Hwan Kwak, Seong-Min Ha, Jae-Chun Ryu, Young-Seak Lee
Summary: Recently, there has been a lot of attention on semiconductor wastewater treatment due to environmental issues. Acid-resistant coatings are necessary for metal pre-filters used in this process. Perfluoroalkoxy alkane (PFA) is commonly used as an acid-resistant coating agent, but its superhydrophobicity hinders water permeability. To address this issue, a surface modification method using oxyfluorination was applied on the PFA-coated metal mesh. The treatment effectively converted the superhydrophobic surface to a hydrophobic one, improving the filtration performance of SiO2 microparticles in the PFA-coated stainless-steel mesh.
Article
Chemistry, Multidisciplinary
Soon Hyeong So, Seongmin Ha, Chung Gi Min, Young-Seak Lee, Chong Rae Park
Summary: A technology enabling safe storage and transport of large amounts of hydrogen is crucial for the commercialization of hydrogen energy. Porous materials have potential as hydrogen storage materials, but their gravimetric hydrogen storage capacity at room temperature is insufficient for practical use. In this study, we present a nitrogen-doped microporous carbon that exhibits the highest total gravimetric hydrogen storage capacity at room temperature, and compare its hydrogen storage capacities with those of metal alloys, highlighting the advantages and disadvantages of different materials.
Article
Chemistry, Multidisciplinary
Seongmin Ha, Seo Gyeong Jeong, Chaehun Lim, Chung Gi Min, Young-Seak Lee
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) were thermally fluorinated to improve their dispersibility with Li4Ti5O12 (LTO) and compensated for the low electronic conductivity of LTO. By controlling the fluorination time, the structure and surface functional group changes in the MWCNTs were determined. The strong electronegativity of fluorine improved the homogeneous dispersion in LTO.
Article
Chemistry, Multidisciplinary
Chaehun Lim, Seo Gyeong Jeong, Seongmin Ha, Naeun Ha, Seongjae Myeong, Young-Seak Lee
Summary: In this study, the functionality transition of pine needle biochar based activated carbon for CO2 adsorption was induced by modulating activation conditions. Different CO2 adsorption mechanisms based on surface functionality and porosity were clearly defined. The modulation of functional groups and porosity enables utilizing pine needles for effective CO2 removal.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Yun-Jeong Choi, Young-Seak Lee, Ji-Hong Kim, Ji-Sun Im
Summary: In this study, reassembly techniques were used to create high-efficiency, high-rate anode materials for lithium-ion batteries using fine graphite particles. By mixing different sizes of graphite particles and controlling the porosity, the electrochemical characteristics of the assembled graphite were improved.
Correction
Chemistry, Multidisciplinary
Soon Hyeong So, Seongmin Ha, Chung Gi Min, Young-Seak Lee, Chong Rae Park
Article
Nanoscience & Nanotechnology
Sangmin Park, Hye-Min Lee, Young-Seak Lee, Sangmin An, Junghoon Yang, Jungpil Kim
Summary: The CO2 adsorption performance of nanoporous graphene is influenced by the pore size and the type of nitrogen-containing functional groups introduced. Introducing nitrogen groups into graphene with appropriate pore size enhances CO2 adsorption through additional hydrogen bonds and Lewis acid-base interactions. Different nitrogen groups exhibit varying adsorption performances, with decreasing performance as pore size increases. This study emphasizes the importance of introducing nitrogen groups into the inner edges of nanoporous graphene.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)