Article
Polymer Science
Magdalena Krystyjan, Gohar Khachatryan, Karen Khachatryan, Marcel Krzan, Wojciech Ciesielski, Sandra Zarska, Joanna Szczepankowska
Summary: Nanotechnology is a rapidly developing field with applications in various industries. This article focuses on carbon nanomaterials, particularly graphene, nanotubes, and quantum dots, and their successful use in biotechnology, biomedicine, and environmental applications. The research and development of innovative carbon-based nanomaterials and the potential of nanotechnology in diverse fields are of great interest.
Article
Chemistry, Multidisciplinary
Ali Zolghadr, Nathan Sidhu, Isaac Mastalski, Greg Facas, Saurabh Maduskar, Sundararajan Uppili, Tony Go, Matthew Neurock, Paul J. Dauenhauer
Summary: The continued need for effective solutions for processing and recycling polymer wastes has led to the development of a modified PHASR system for measuring and visualizing plastic pyrolysis, demonstrating fast heating and cooling times and stable temperature control.
Article
Energy & Fuels
Jinxiu Cao, Yun Yu, Hongwei Wu
Summary: This study proposes a new method using tracers to determine the true yields of ejected aerosols and evaporated vapors in condensable volatiles produced from cellulose pyrolysis. The results show the key role of thermal ejection in the formation of condensable volatiles, significantly influencing the yield and composition of tar generated from cellulose pyrolysis.
Article
Chemistry, Multidisciplinary
Miaomiao Zhu, Zhengqi Chai, Ze-Jie Lv, Tianyu Li, Wei Liu, Junnian Wei, Wen-Xiong Zhang
Summary: In this study, we demonstrate the controllable cleavage of active and inert C-C bonds within biphenylene through the reaction with potassium graphite and rare-earth complexes with different metal centers. The Caryl-Caryl single bond is activated, producing 9-scandafluorene, when scandium is used as the reaction center. On the other hand, the aromatic ring in biphenylene undergoes ring contraction to form benzopentalene dianionic lutetium when Lu is the reaction center. The selectivity and reaction mechanism are elucidated by isolating intermediates and conducting DFT calculations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Hong-Gang Zhang, Ya-Qi Zhuo, Xiao-Min Zhang, Leng Zhang, Piao-Yang Xu, Han-Rui Tian, Shui-Chao Lin, Qianyan Zhang, Su-Yuan Xie, Lan-Sun Zheng
Summary: The flash vacuum pyrolysis (FVP) technique is useful for preparing curved polycyclic aromatic compounds (PAHs) and caged nanocarbon molecules. An ultrahigh-temperature FVP (UT-FVP) apparatus with a controllable operating temperature of up to 2500°C has been developed to synthesize fullerene C-60 from nonaromatic single carbon reactants. The improvements in the UT-FVP apparatus allow for the synthesis of fullerene C-60 and potentially larger curved PAHs in the future.
Article
Chemistry, Physical
Linlin Liu, Daitao Kuang, Lizhen Hou, Heng Luo, Lianwen Deng, Shiliang Wang
Summary: C-based microwave absorbers, such as hard carbon-based composites, have been studied for over 80 years and show promise as advanced high-performance microwave absorbers. However, little research has been done on the microwave absorption properties of hard carbon-based composites. In this study, composites composed of layered hard carbon embedded with ZnO nanoparticles were synthesized and found to exhibit excellent microwave absorption properties, which could offer a new insight for the design of high-performance microwave absorbers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yan Guo, Yunwei Wang, Zhenfeng Huang, Xili Tong, Nianjun Yang
Summary: CoP nanoparticles were used as a bridge to deposit Rh nanoparticles on carbon black, achieving controllable size and high dispersion. The Rh nanoparticles with a size of -3.23 nm exhibited excellent HER activity, surpassing other reported Rh-based catalysts. This study provides a facile strategy for the design of advanced HER electrocatalysts.
Article
Chemistry, Multidisciplinary
Lenys Fernandez, Jocelyne Alvarez-Paguay, Gema Gonzalez, Rafael Uribe, Diego Bolanos-Mendez, Jose Luis Pineiros, Luis Celi, Patricio J. Espinoza-Montero
Summary: In this investigation, a hydrogen peroxide (H2O2) electrochemical sensor was evaluated using a modified glassy carbon (GC) electrode. The sensor showed good electrochemical properties and could be tuned by modifying conditions and synthesis method. The coverage of TiO2-ZrO2 nanoparticles on carbon nanotubes significantly affected the immobilization and sensitivity of the electrochemical biosensor. The fabricated sensor exhibited a linear relationship between H2O2 concentration and peak current in whey milk samples.
FRONTIERS IN CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Qizhong Wang, Connor S. Watts, Christos E. Athanasiou, Zhenghong Dai, Mingyu Hu, Brian W. Sheldon, Nitin P. Padture
Summary: The atmosphere significantly affects the flash-sintering process, with the use of argon resulting in a dramatic reduction in the flash-onset furnace temperature for titania nanopowders. This leads to finer, more uniform grain sizes and lower, uniform porosity in the ceramics.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Anamul Hoque Bhuiyan, Takuma Nagakawa, Mohammad Zakaria, Koji Nakane
Summary: An enzyme-immobilized PVB-Zr hybrid tube was developed and shown to exhibit stability and higher activity in different environments compared to free enzymes. The Km value of immobilized enzymes was slightly higher, but they retained activity over multiple reaction cycles. Furthermore, immobilized lipase in organic solvents demonstrated high catalytic conversion efficiency.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Bairui Guo, Zhongtian Du, Xiaoyu Shen, Mengjing Han, Yanbin Zhao, Jingjie Luo, Changhai Liang
Summary: Co-N-C catalysts were prepared by pyrolysis at 250-400°C for efficient oxidation of mono-phenols. 2,3,6-Trimethylphenol could be easily oxidized into 2,3,5-trimethyl-1,4-benzoquinone with dioxygen. Catalytic activity was not observed in CoO, Co3O4, or metallic Co particles, indicating that active Co(ii) species with N/O coordination dispersed on disordered carbonaceous materials.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Shubin Yang, Bunsho Ohtani
Summary: In this study, a Rh-TiO2 composite material was prepared by oxidizing Rh(III) species to Rh(IV) in an aqueous solution, which showed enhanced photocatalytic activity. XPS analysis confirmed the presence of Rh(IV) species in the composite, and the effect of Rh/Ti molar ratio on the photocatalytic activity was studied, demonstrating that Rh doping improved the visible-light absorption and overall performance of the composite.
Article
Energy & Fuels
Yu-Hong Kang, Tao Chen, Juan Gao, Fan Li, Lin Hu, Guang-Hui Liu, Cui-Ying Lu, Yan-Jun Li, Xian-Yong Wei, Ya-Jun Ma, Zhi-Min Zong, Hong-Cun Bai
Summary: The organic macromolecular networks (MMNs) from Hecaogou subbituminous coal (HSBC) were investigated using multiple technical strategies, and the pyrolysis mechanisms of MMNs were effectively investigated. The study provides insights into the structure and distribution of organic species in HSBC and their influence on the release of organic volatile species during pyrolysis.
Article
Chemistry, Physical
Kevin M. Wyss, Jacob L. Beckham, Weiyin Chen, Duy Xuan Luong, Prabhas Hundi, Shivaranjan Raghuraman, Rouzbeh Shahsavari, James M. Tour
Summary: The study demonstrates the direct and facile upcycling of plastic waste-derived pyrolysis ash into high purity turbostratic flash graphene for various applications, including the fabrication of nanocomposites that show improved performance in terms of failure strain and compressive strength.
Article
Polymer Science
S. Klaimy, J-F Lamonier, M. Casetta, S. Heymans, S. Duquesne
Summary: This study demonstrates the importance of aromatic compounds formation in the pyrolysis of plastic waste, whether it is done individually or in mixtures. The mixture pyrolysis results in a higher quantity of aromatic compounds and a decrease in the amount of waxy compounds, suggesting that sorting may not be necessary for effective plastic waste recovery through pyrolysis.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Engineering, Chemical
M. Kawase, K. Sato, R. Mitsui, H. Asonuma, M. Kageyama, K. Yamaguchi, G. Inoue
Article
Energy & Fuels
Satoshi Umemoto, Shiro Kajitani, Saburo Hara, Motoaki Kawase
Article
Chemistry, Physical
Gen Inoue, Motoaki Kawase
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2016)
Article
Chemistry, Physical
Gen Inoue, Motoaki Kawase
JOURNAL OF POWER SOURCES
(2016)
Article
Chemistry, Physical
Gen Inoue, Kouji Yokoyama, Junpei Ooyama, Takeshi Terao, Tomomi Tokunaga, Norio Kubo, Motoaki Kawase
JOURNAL OF POWER SOURCES
(2016)
Article
Chemistry, Applied
Satoshi Umemoto, Shiro Kajitani, Kouichi Miura, Hiroaki Watanabe, Motoaki Kawase
FUEL PROCESSING TECHNOLOGY
(2017)
Article
Chemistry, Physical
Takeshi Terao, Gen Inoue, Motoaki Kawase, Norio Kubo, Makoto Yamaguchi, Kouji Yokoyama, Tomomi Tokunaga, Kazuhiko Shinohara, Yuka Hara, Toru Hara
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
Gen Inoue, Motoaki Kawase
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
H. Ishikawa, Y. Sugawara, G. Inoue, M. Kawase
JOURNAL OF POWER SOURCES
(2018)
Article
Energy & Fuels
Hiroyasu Fujitsuka, Ryuichi Ashida, Motoaki Kawase, Kouichi Miura
Article
Electrochemistry
Yulei Ma, Miho Kageyama, Motoaki Kawase
Summary: For the grand-scale commercialization of PEFCs, their performance needs further improvement, particularly in terms of the distributions of local current density and materials concentration, including oxygen and water. This study evaluates the gas macromixing in PEFCs by using residence time distribution (RTD) analysis from a chemical engineering perspective, and experimentally measures and predicts the cell performance with different active areas and gas flow rates in parallel and serpentine gas channels. The results show that promoting gas macromixing can improve water humidification and cell performance at low oxygen conversion, and computationally inexpensive compartment models have potential applications in system simulation and design procedures.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Proceedings Paper
Electrochemistry
Kazuki Ikeshita, Gen Inoue, Motoaki Kawase
Proceedings Paper
Electrochemistry
Gen Inoue, Kazuki Ikeshit, Minami Iwabu, Yukari Sagae, Motoaki Kawase
SELECTED PROCEEDINGS FROM THE 232ND ECS MEETING
(2017)
Proceedings Paper
Electrochemistry
M. Kawase, K. Yamaguchi, M. Kageyama, K. Sato, G. Inoue
POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16)
(2016)
Proceedings Paper
Electrochemistry
R. Kotoi, G. Inoue, M. Kawase
POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16)
(2016)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)