Article
Chemistry, Inorganic & Nuclear
Xinxin Hang, Yadan Xue, Meng Du, Rui Yang, Jiawei Zhao, Huan Pang
Summary: This study presents a strategy to synthesize Co-MOF-based hierarchical micro/nanospheres with ultrathin nanosheet subunits, which exhibit exposed active sites and abundant channels for fast electron and electrolyte transport. The optimized sample Co-MOF/M2 shows high specific capacitance and excellent rate performance.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Mingqi Wang, Shixin Fa, Guoxian Zhang, Jiate Yu, Qiuyu Zhang
Summary: A novel nanosphere (MS@PTL-g-PNIPAM) is designed, which is temperature and pH responsive and can dynamically reversibly crosslink/de-crosslink. With the help of this technology, the nanospheres can be repeatedly programmed into protein imprinted nanospheres towards different target proteins. This study achieves the specific separation of different target proteins from protein mixture and real bovine blood, providing convenience for protein imprinted materials to be used in various applications.
Article
Chemistry, Multidisciplinary
Abdul Hoque, Artur Huseinov, Chaminda P. Nawarathne, Noe T. Alvarez
Summary: Bimetallic aluminum oxide (AlOx)-iron oxide (FeOx) nanoparticles with different shapes and elemental compositions were synthesized by tuning the low-temperature solvothermal reaction conditions. The shape evolution of bimetallic oxide nanoparticles was influenced by the concentration of the iron oleate precursor in the reaction medium. Various techniques, including TEM, XRD, and XPS, were used to characterize the synthesized nanoparticles.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hyeongyun Song, Dong Hwan Kim, Cheol Woo Park, Jungho Jae, Seungki Hong, Jaegeun Lee
Summary: This study systematically investigated the robustness of carbon nanotubes (CNTs) synthesis by wet-impregnated catalyst for catalytic chemical vapor deposition (CCVD). The research focused on four factors that could potentially affect the robustness of CNT synthesis system. The results showed that vacuum baking process, batch-to-batch variation of catalysts, spatial non-uniformity, and multi-step heating process all had significant impacts on CNT synthesis.
Article
Materials Science, Multidisciplinary
Xinxin Yuan, Chen Liang, Chao Ruan, Yi Chang, Lele Xu, Hailu Huang, Minghai Chen, Zhenzhong Yong
Summary: In this study, low-cost red soil was successfully used as a catalyst for the synthesis of high-quality multi-walled carbon nanotubes. The composition characteristics of red soil, rich in iron and aluminum oxide but lacking alkali and alkaline earth metals, contributed to its high catalyzation efficiency. The porous structure formed after calcination also played a positive role in the catalytic growth of MWCNTs, improving catalyst utilization by facilitating gas phase diffusion.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Applied
Xiaoqi Zhao, Yami Ling, Hao Suo, Zhiyu Zhang, Jiangrui Bai, Chongfeng Guo
Summary: In this work, cubic-phased CeO2:18 mol%Yb3+/2 mol%Er3+ nanospheres were prepared by coprecipitation method. The size of nanosphere was precisely controlled by regulating the amount of co-precipitator urea. The morphology evolution of CeO2:18%Yb3+/2%Er3+ samples that vary from nano-sphere to nano-flower with extending the reaction time was investigated. The influence of non-radiative relaxation (NR) processes and surface quenching on up-conversion emission output of CeO2:18%Yb3+/2%Er3+ was explored.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Multidisciplinary
Michal Korenek, Tatiana Ivanova, Veronika Svacinova, Miroslav Maslan
Summary: The phase composition and comparison of iron-based catalysts used for carbon nanotube synthesis were investigated. The composition of the prepared samples differed depending on the synthesis temperature, catalyst, and precursor. Alpha-Fe and Fe3C were present in all samples, and gamma-Fe and iron oxides were identified under certain conditions. Electron microscopy confirmed the morphology of carbon nanotubes/nanofibers and the presence of iron species.
Article
Chemistry, Multidisciplinary
Kaier Wu, Yuye Bai, Dewei Chen, Lu Chen, Yubing Huang, Shuli Bai, Yibiao Li
Summary: Heterocyclic compounds are widely found in nature and drug molecules, with many nitrogen-containing heterocyclic compounds exhibiting unique activity. 1,4-dihydropyridines, for example, have good antitumor and antibacterial effects and can be used as calcium channel blockers in the treatment of cardiovascular diseases. This study successfully designed cobalt carbon nanotubes as a catalyst for the efficient synthesis of 1,4-dihydropyridines under mild conditions, with advantages including high yields, low catalyst loading, short reaction time, and recyclability.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Wasim Ullah Khan, Ahmed Al Shoaibi, Srinivasakannan Chandrasekar, Mohammad M. Hossain
Summary: Nickel and cobalt-based titania-supported bimetallic catalysts with varying metal loading were synthesized. High-loading catalysts showed higher activity and stability, with 25NCT catalyst exhibiting the highest methane conversion and carbon yield. The catalyst's enhanced activity can be attributed to its higher specific surface area and the formation of carbon nanotubes through tip-growth and base-growth mechanisms.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Peiyuan Mao, Yong Wang, Wenbin Guo, Wen Zhang, Tong He, Suyu Dong, Pandeng Xiao, Shun Rao
Summary: In this study, two kinds of SnO2@C@MoS2 hollow nanospheres with different morphologies were designed by adjusting solvents, exhibiting outstanding lithium storage properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Thuan Minh Huynh, Sura Nguyen, Ngan Thi Kim Nguyen, Huan Manh Nguyen, Noa Uy Pham Do, Danh Cong Nguyen, Luong Huu Nguyen, Cattien V. Nguyen
Summary: The synthesis of carbon nanotubes using methane as a carbon source via chemical vapor deposition on a stainless-steel foil catalyst revealed that the catalyst pretreatment temperature significantly influences the formation of CNTs and their diameter. A shorter pretreatment time results in the growth of semiconducting CNTs, while a longer pretreatment time leads to the formation of metallic CNTs, providing insights for improving the quality of CNTs grown on steel foil catalysts.
Article
Chemistry, Physical
Cornelia Broicher, Malte Klingenhof, Marvin Frisch, Soeren Dresp, Nikolas Mao Kubo, Jens Artz, Joerg Radnik, Stefan Palkovits, Anna Katharina Beine, Peter Strasser, Regina Palkovits
Summary: The design of stable and active catalysts for large-scale hydrogen generation through water electrolysis remains a key challenge. A novel MnCo based cubic particle catalyst exhibits excellent oxygen evolution reaction activity and stability in 1.0 M KOH, showing superior performance compared to reference catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Helen Uchenna Modekwe, Messai Adenew Mamo, Kapil Moothi, Michael Olawale Daramola
Summary: This study investigated the effect of different metal oxide supports on a bimetallic NiMo catalyst during the catalytic growth of carbon nanotubes from waste polypropylene. The results showed that the stabilizing role of supports is fundamental in preventing nanoparticle agglomeration and aggregation, thereby resulting in improved yield and quality of CNTs. Supported NiMo catalysts produced better aligned graphitic and high-quality CNTs, indicating the important role of catalyst support in the yield and quality of CNTs produced.
Article
Engineering, Environmental
V. L. Kuznetsov, S. I. Moseenkov, A. V. Zavorin, G. V. Golubtsov, V. V. Goidin, O. S. Rabinovich, A. I. Malinouski, M. Yu. Liakh
Summary: The problem of the loss of homogeneous fluidization and the formation of large clumps of MWCNTs during their catalytic synthesis in a fluidized bed reactor has been studied experimentally and theoretically. The study found that high-performance catalysts with the ability to produce agglomerates of MWCNTs with high cohesion, together with a high concentration of catalyst particles in the fluidized bed volume, play a crucial role in the formation of large clumps of MWCNTs. A relationship between the chemical components of the catalyst and the cohesive properties of the MWCNT agglomerates formed on it has been established. An approximate semi-analytical scheme for calculating the formation and growth of large fractal agglomerates (clumps) of MWCNTs during their catalytic synthesis in a fluidized bed has been developed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Marlen Gonzalez-Reyna, Aaron Rodriguez-Lopez, Juan Francisco Perez-Robles
Summary: Carbon nanostructures with metal support are commonly used in electrochemical processes for their high surface area, chemical stability, and catalytic performance. Encapsulating individual metallic nanoparticles can protect them from corrosion. Among carbon nanostructures, graphene, carbon nanotubes, and carbon nanospheres are popular choices, with carbon nanospheres showing better catalytic activity. However, the synthesis process for carbon nanospheres with metal inside can be time-consuming and expensive. A one-step chemical vapor deposition process has been proposed for the advantageous synthesis of carbon nanospheres encapsulating an iron-nickel alloy. This material shows potential applications in environmental and energy processes, with improved catalytic activity and specific capacitance compared to other materials like graphene decorated with FeNi alloys.
Article
Multidisciplinary Sciences
Xiaoguang Liu, Shuai Zhang, Xin Wen, Xuecheng Chen, Yanliang Wen, Xiaoze Shi, Ewa Mijowska
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Multidisciplinary
Xueying Mu, Yunhui Li, Xiaoguang Liu, Changde Ma, Hanqing Jiang, Jiayi Zhu, Xuecheng Chen, Tao Tang, Ewa Mijowska
Article
Chemistry, Physical
Xiaoguang Liu, Changde Ma, Yanliang Wen, Xuecheng Chen, Xi Zhao, Tao Tang, Rudolf Holze, Ewa Mijowska
Summary: The combined catalyst of ferrocene and sulfur has successfully achieved the highly efficient carbonization of waste polypropylene into carbon nanosheets, resulting in high carbon yield and thin thickness. The activated carbon nanosheets exhibit a well-defined hierarchical porous structure with large specific surface area and pore volume, delivering excellent electrode performance and high energy density in the fabricated symmetric supercapacitor.
Article
Chemistry, Applied
Shuai Zhang, Maciej Galinski, Xiaoguang Liu, Krzysztof Sielicki, Xuecheng Chen, Paul K. Chu, Rudolf Holze, Ewa Mijowska
Summary: The study shows that selectively sintering single Al-MOF crystals at high temperature to form an interconnect nanoporous carbon structure can improve the performance of supercapacitors. The NPC-950 sample exhibits excellent capacitance performance, while nanoporous carbon without the interconnect structure shows lower performance. Proper ion size and solvent can enhance capacitive performance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Thermodynamics
Elisa Thauer, Xiaoze Shi, Shuai Zhang, Xuecheng Chen, Lukas Deeg, Ruediger Klingeler, Karolina Wenelska, Ewa Mijowska
Summary: This study introduces a facile method for preparing graphene coated core-shell Mn3O4 nanoparticles encapsulated in hollow carbon spheres. The high temperature preparation of HCSs led to good electrical conductivity and the Mn3O4 filling exhibited characteristic ferrimagnetic ordering. Electrochemical studies showed that the encapsulated Mn3O4 nanoparticles had superior properties, providing new choices for electrode materials.
Article
Chemistry, Physical
Martyna Trukawka, Karolina Wenelska, Lennart Singer, Ruediger Klingeler, Xuecheng Chen, Ewa Mijowska
Summary: Hollow carbon spheres functionalized with copper oxide demonstrate fully reversible conversion as an anode material for lithium ion batteries, providing a stable electron transport pathway and volume change buffering effect. The uniformly distributed Cu2O nanoparticles inside HCSs contribute to enhanced specific capacity and cycling performances in comparison with pure HCSs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jiakang Min, Xiaodong Xu, J. Justin Koh, Jiang Gong, Xuecheng Chen, Jalal Azadmanjiri, Feifei Zhang, Xin Wen, Chaobin He
Summary: By utilizing renewable biomass branched poly(L-lysine), nitrogen-doped porous carbon materials were successfully synthesized through a metal-free process, achieving high carbon yield and nitrogen doping content. These carbon materials exhibited excellent performance in the oxygen reduction reaction, showing superior stability and endurance compared to Pt/C in basic conditions.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Ronghua Yu, Xin Wen, Jie Liu, Yanhui Wang, Xuecheng Chen, Karolina Wenelska, Ewa Mijowska, Tao Tang
Summary: A green and high-yield route has been developed to recycle waste masks into CNTs/Ni hybrids with superior microwave absorption capabilities. The mechanism of the as-fabricated hybrids was mainly attributed to the synergistic effects of CNTs and Ni on conduction and magnetic losses, polarization, and impedance matching, providing a scalable and cost-effective strategy for recycling waste masks into valuable carbon nanomaterials.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Tomasz Kedzierski, Daria Baranowska, Damian Beben, Beata Zielinska, Xuecheng Chen, Ewa Mijowska
Summary: Researchers have proposed a novel type of unsupported and non-active-material thin film as working electrodes for batteries, prepared via vacuum-assisted filtration method, showing good cyclic stability and reversible capacity. The addition of TiO2 and MnO2 improved the film's capacity.
Article
Chemistry, Physical
Karolina Wenelska, Martyna Trukawka, Wojciech Kukulka, Xuecheng Chen, Ewa Mijowska
Summary: Mesoporous hollow carbon spheres functionalized with iron oxide nanoparticles and manganese oxide nanorods showed significant improvement in electrochemical performance as an anode material in lithium-ion batteries.
Article
Chemistry, Physical
Shiyun Li, Yuqiong Guo, Lina Liu, Jiangang Wang, Luxi Zhang, Weilong Shi, Malgorzata Aleksandrzak, Xuecheng Chen, Jie Liu
Summary: FeTCPP@CNNS composites with g-C3N4 nanosheet and FeTCPP as sensitizers were fabricated using in situ hydrothermal self-assembly. The composites exhibited a stacked lamellar structure with uniformly introduced FeTCPP. Compared to pure CNNS, the FeTCPP@CNNS composites showed significantly improved photocatalytic performance in the degradation of 4-NP. The optimal content of FeTCPP to CNNS (3 wt%) achieved a photodegradation activity of 92.4% within 1 hour.
Article
Biochemistry & Molecular Biology
Lu Liu, Risong Na, Lianjuan Yang, Jixiang Liu, Yingjia Tan, Xi Zhao, Xuri Huang, Xuecheng Chen
Summary: The drug development process faces challenges of low success rates and high costs. The traditional one drug-one target approach is inadequate for treating multifactorial diseases. This study developed a pipeline combining machine learning, interpretative models, and molecular dynamics simulations to predict active compounds and fragments for the treatment of B-cell lymphoma. The results identified a potential multitarget inhibitor with acceptable drug properties.
Review
Biochemistry & Molecular Biology
Xuecheng Chen, Yuping Wu, Rudolf Holze
Summary: The most significant advantage of supercapacitors is their high stability in terms of lifetime, charge/discharge cycles, and other stability-related properties, along with their high current capability. However, actual devices often experience a deterioration in performance parameters over time and use. This review comprehensively addresses the causes at material, component, and device levels, while also discussing modeling approaches and suggestions for slowing down aging and degradation.
Article
Chemistry, Physical
Changde Ma, Jiang Gong, Shuang Zhao, Xiaoguang Liu, Xueying Mu, Yanhui Wang, Xuecheng Chen, Tao Tang
Summary: The study introduces a green and one-pot method to produce heteroatom-doped hierarchical porous carbon materials without toxic reagents. The nitrogen-doped porous carbon obtained has high specific surface area and abundant heteroatom dopants, with the potassium carbonate template being recyclable. The material exhibits high specific capacitance and excellent rate capability, making it suitable for various research fields.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Shiyun Li, Ling Zhang, Luxi Zhang, Jiaoxia Zhang, Haijun Zhou, Xuecheng Chen, Tao Tang
Summary: Three-dimensional core-shell-structured TiO2@PPy/rGO nanocomposites were successfully constructed via polymerization, exhibiting superior electrochemical performance and cycling stability compared to TiO2@PPy nanospheres.
NEW JOURNAL OF CHEMISTRY
(2021)
