Article
Chemistry, Physical
Fang Zhang, Shuang Zong, Yue Zhang, Haijun Lv, Xinying Liu, Juan Du, Aibing Chen
Summary: By utilizing mesoporous silica template to prepare N-doped HCS, direct carbon formation can be achieved, simplifying the preparation process. The thickness of the HCS shell, morphology, and surface properties can be adjusted, leading to high electrochemical performance as an active electrode material in supercapacitors.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Zhibo Zhao, Bo Kang, Jia Xu, Chunling Zhu, Xiaoli Zhang, Xitian Zhang, Yujin Chen
Summary: The study developed a simple method to prepare Ni@NCNT/NCHSs, which have hierarchical and hollow features and exhibit high-efficiency electromagnetic wave absorption performance.
Article
Chemistry, Multidisciplinary
Mengna Fan, Zhonghu Yang, Zhihua Lin, Xunhui Xiong
Summary: A simplified method is proposed in this study to improve the electronic conductivity and ion diffusion rate of TiO2 anodes by using a special coating structure and carbon layer. The results demonstrate that the material prepared by this method exhibits high reversible capacity and cycling performance.
Article
Chemistry, Multidisciplinary
Panyong Kuang, Yaru Wang, Bicheng Zhu, Fanjie Xia, Ching-Wei Tung, Jinsong Wu, Hao Ming Chen, Jiaguo Yu
Summary: This study demonstrates the tailoring of the electronic structure of Pt single atoms supported on N-doped mesoporous hollow carbon spheres through strong EMSI engineering, leading to the Pt-1/NMHCS composite exhibiting higher activity and stability in catalyzing the electrocatalytic hydrogen evolution reaction compared to Pt-NP and commercial Pt/C. The strong EMSI effect in a unique N-1-Pt-1-C-2 coordination structure significantly modifies the electronic structure of Pt 5d states, enhancing the reduction of adsorbed proton and facilitating H-H coupling for Pt-like HER activity.
ADVANCED MATERIALS
(2021)
Article
Polymer Science
Periyasamy Thirukumaran, Raji Atchudan, Asrafali Shakila Parveen, Madhappan Santhamoorthy, Vanaraj Ramkumar, Seong-Cheol Kim
Summary: This study focuses on producing porous carbons with enhanced performance by using different activation temperatures and Polybenzoxazine (Pbz) as a precursor. Nitrogen-doped porous carbons (NRPCs) were successfully obtained with high specific capacitance at an activation temperature of 900 degrees C. The results demonstrate that the NRPC prepared at 900 degrees C show excellent electrochemical performance attributed to their high surface area, suitable pore structure, and presence of heteroatoms.
Article
Chemistry, Physical
Yihua Tang, Xiao Wang, Jingjing Chen, Xinxin Wang, Dajian Wang, Zhiyong Mao
Summary: Highly nitrogen-doped hollow carbon spheres (HCSs) were successfully synthesized using solid graphitic carbon nitride (g-C3N4) precursor as carbon and nitrogen sources, showing promising lithium ion storage performances as anode materials in lithium ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jinyuan Liu, Shumin Zhu, Bin Wang, Ruizhe Yang, Rong Wang, Xingwang Zhu, Yanhua Song, Junjie Yuan, Hui Xu, Huaming Li
Summary: In this work, nitrogen-doped hollow carbon spheres assembled with cobalt nanoparticles (Co@NHC) were synthesized by electrostatic adsorption to serve as a star cocatalyst for photocatalysis. The photocatalytic activity of Co@NHC material was evaluated and showed significantly higher hydrogen evolution rate compared to pure carbon nitride sheet (MCNS) material. The excellent charge transport properties of the carbon material effectively facilitated charge transfer, leading to improved photocatalytic performance. This study provides a feasible and promising approach for doping transition metals to enhance photocatalytic activity.
CHINESE CHEMICAL LETTERS
(2023)
Article
Materials Science, Ceramics
Chunjian Xue, Jinlian Zhao, Yinpeng Liu, Xiying Li, Jiwei Zhang, Jingwei Zhang
Summary: The shell thickness of hollow carbon spheres (HCs) has a significant impact on the electrochemical performance due to its effect on lithium ion transport kinetics. A simple one-pot method was developed to synthesize Ndoped hollow carbon nanospheres (NHCs) with different shell thickness (6, 10, and 13 nm) while keeping other parameters almost the same. The NHCs-1 sample with a shell thickness of 6 nm exhibited higher initial charge capacity and better cycle stability compared to NHCs-2 and NHCs-3 with thicker shells of 10 nm and 13 nm, respectively. The capacity dependence on shell thickness was explained by changes in the mass transfer coefficient of Li-ion across the wall. The outstanding electrochemical properties of NHCs were attributed to their unique hollow structure, N-doping, and high specific surface area. The strategy for preparing hollow carbon spheres with different shell thickness provides a promising alternative for developing superior electrode materials for energy storage.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Sunghee Ahn, Kwangho Park, Kyung Rok Lee, Arsalan Haider, Canh Van Nguyen, Haneul Jin, Sung Jong Yoo, Sungho Yoon, Kwang-Deog Jung
Summary: Atomically dispersed Ru(III) catalysts on hierarchical and porous supports show high catalytic activity and stability for the hydrogenation of CO2 to formate. The N-doped mesoporous carbon hollow spheres (N-MCHS) supported Ru(III) catalysts were synthesized at different temperatures, and the dominant N species on the catalysts were found to be pyrrolic and pyridinic N at low pyrolysis temperatures, and graphitic N at high pyrolysis temperatures. The highest catalytic activities were achieved on the catalysts with predominant Ru-N-graphitic active sites. The Ru/N-MCHS-700 catalyst exhibited excellent stability in both batch and continuous reactors, without noticeable deactivation even after 72 hours of continuous hydrogenation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xiangjun Lu, Jie Wang, Tao Li, Bing Ding, Shude Liu, Joel Henzie, Mohammed A. Amin, Brian Yuliarto, Yoshiyuki Sugahara, Yusuke Yamauchi
Summary: In this work, hollow ordered mesoporous carbon (HOMC) materials were prepared using a self-templating method, and their superior electrochemical performance for supercapacitors was demonstrated. This strategy provides a new avenue for designing and constructing hollow carbon materials for various applications in electrochemical energy storage devices.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Velayutham Sudha, Velu Duraisamy, Natarajan Arumugam, Abdulrahman I. Almansour, Terence Xiaoteng Liu, Venkataraman Dharuman, Sakkarapalayam Murugesan Senthil Kumar
Summary: The spinel type of metal oxide decoration with a heteroatom-doped mesoporous carbon hollow sphere has been developed as an excellent electrocatalyst in sensor applications. The single-step hard template strategy utilizing cobalt precursor cobalt phthalocyanine enables the effective detection of dopamine. The Co3O4/NDHCS-0.2 material exhibits remarkable sensing performance due to its stable mesoporous hollow carbon sphere, high Co content, and presence of pyridine N centers.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Juan Du, Yue Zhang, Haijun Lv, Aibing Chen
Summary: The N/B-co-doped ordered mesoporous carbon spheres were developed using an ionothermal strategy, showing enhanced electrochemical performance and potential as novel electrode materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Ming Xu, Yuheng Liu, Qiang Yu, Shihao Feng, Liang Zhou, Liqiang Mai
Summary: The N-doped hollow carbon spheres, with ultrahigh surface area and capacitance, demonstrate impressive performances in symmetric supercapacitors, making them a promising candidate electrode material.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Thangaian Kesavan, Raja Murugan, Kothandaraman Ramanujam
Summary: In this study, nitrogen and phosphorous co-doped ordered mesoporous carbon (NPMC) was successfully synthesized and its charge storage capacity in aqueous and non-aqueous electrolytes was explored. The results showed that NPMC exhibited high specific capacitance and remarkable capacitance retention in water medium, and impressive energy density and power density in non-aqueous medium.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Orlette Mkhari, Themba D. Ntuli, Neil J. Coville, Edward N. Nxumalo, Manoko S. Maubane-Nkadimeng
Summary: A systematic study on the effects of N-Cdots supported on different carbon spheres (HCSs, SCSs) and silica spheres (SSs) surfaces was conducted, with morphological analysis done through TEM, TGA, XRD, FTIR, UV-vis, and PL techniques. The data suggested different interactions between Cdots and the supports, leading to varying photoluminescence quantum yields.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.