Article
Nanoscience & Nanotechnology
Fei-Xiang Tian, Hu Li, Minghui Zhu, Weifeng Tu, Dehai Lin, Yi-Fan Han
Summary: Different MnO2 polymorphs were studied for their properties in CO oxidation, with beta-MnO2 showing higher activity and stability. The mechanism of CO oxidation over MnO2 was proposed based on in situ spectra and intrinsic kinetic studies.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Environmental Sciences
Zhengshuai Sun, Dingding Yao, Chengyang Cao, Zihang Zhang, Liqi Zhang, Haodong Zhu, Qiaoxia Yuan, Baojun Yi
Summary: Graphite is an important industrial material that has experienced a shortage due to increasing demand and rising costs of raw materials. This study explores a low-cost method of preparing graphite using biomass as the carbon source, and investigates the effects of temperature and iron content on the graphitization process. The results show that increasing the amount of catalyst and temperature can enhance the graphitization of the products.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Hyeonwoo Choi, Yoonseong Choi, Jiho Min, Keonwoo Ko, Yunjin Kim, Sourabh S. Chougule, Davletbaev Khikmatulla, Namgee Jung
Summary: This study focuses on the technical issues of performance degradation in proton exchange membrane fuel cells (PEMFCs), specifically catalyst dissolution and agglomeration. Carbon shell encapsulation is introduced as a promising strategy to address these challenges. The formation of carbon shells on catalyst surfaces using precursor ligands is studied, and insights into the carbon shell formation mechanism are provided through X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The thermal stability and electrochemical durability of carbon shells are investigated using in situ transmission electron microscopy (in situ TEM) and accelerated durability tests.
Article
Chemistry, Physical
Gabriella A. Di Domizio, Lucas T. Alameda, Julian Fanghanel, Robert W. Lord, Jennifer R. Miller, Raymond E. Schaak
Summary: Cation exchange is a common pathway for nanoparticle synthesis, and monitoring reactions with tools such as a laser pointer can differentiate between pathways involving cation exchange and dissolution/reprecipitation. Temperature plays a crucial role in determining the reaction pathway for synthesizing different polymorphs of manganese sulfide.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hongrui Cheng, Xiaofeng Wei, Haijiang Qiu, Wensong Wang, Wenyue Su, Yuanhui Zheng
Summary: A novel in situ fluorescent patterning strategy was developed to achieve covert, chemically stable and solvent-tolerant cellulose-based security labels by UV exposure. The fluorescent emission of cellulose-based materials exhibits excellent stability under various environments, indicating great potential for applications.
Article
Materials Science, Multidisciplinary
Juan Zhang, Jingyi Zhang, Siyang Mei, Jun Zhou, Xiaoming Liu, Chi Wang, Shuwei Cao, Dahai Zhang
Summary: The study found that annealing amorphous silicon nitride fibers at air pressure between 100-1000 Pa resulted in optimal mechanical properties, as the moderate oxygen partial pressure could simultaneously inhibit both active and passive oxidation, maintaining high strength of the fibers. Additionally, annealing time also influenced the thermal behavior of the fibers, ultimately leading to degradation through internal crystallization and formation of nanowires on the outer surface.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Bo Gao, Zeyuan Shi, Zehao Shi, Jiahao Li, Liang Hu, Guanglin Zhu
Summary: Rare earth elements and graphene composites have been shown to possess excellent catalytic properties in energy storage materials. In this study, CeO2/graphene composites were prepared using intercalation exfoliation and in situ electrodeposition methods simultaneously. These composites exhibited good defect levels and acted as a shielding layer to hinder the shuttle of polysulfides, resulting in improved cycling stability and rate performance of the cell. The separator cell with CeG showed an initial discharge specific capacity of 1133.5 mAh/g at 0.5C, excellent rate performance (978.5 mAh/g at 2C), and long cycling life (790 mAh/g after 400 cycles).
Article
Materials Science, Ceramics
Min Wang, Yu Mei, Silu Chen, Sridhar Komarneni, Jianfeng Ma
Summary: In this study, we report a composite catalyst composed of porous N-doped carbon nanospheres encapsulating cobalt nanocrystals, which can activate persulfate (PS) to degrade organic pollutants effectively. The N-doped carbon nanospheres protect the cobalt nanocrystals and N doping helps to fix the Co metal. The composite exhibits a high surface area and rich mesoporous structure, exposing more active sites and facilitating mass transport. The best catalyst composition can efficiently degrade tetracycline in 40 minutes through PS activation involving mediated electron-transfer.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Hu Wang, Bing Li, Yong Chen, Xin Zhong, Zhifeng Yao, Mengnan Zhang, Zunqing Zheng, Mingfa Yao
Summary: The interaction mechanism between polyoxymethylene dimethyl ethers (DMM3) and isooctane during low-temperature oxidation was investigated. It was found that DMM3 can trigger and significantly enhance isooctane's low-temperature reaction, while isooctane inhibits the formation of certain intermediate species of DMM3. The inhibitory effect is weakened at temperatures above 800 K, and blending inactive isooctane accelerates the formation of certain intermediate species in DMM3 during low-temperature oxidation, but to a limited extent compared to the inhibitory effect.
Article
Thermodynamics
Xun Zhang, Bing Lu, Ling Qiao, Cong Ding
Summary: This study investigates the influence of OH free radicals on the reactivity of aromatic rings and their side chain active groups through simulations and experiments. The results show that the reaction energy barriers of OH radicals with aromatic hydrocarbons are low and phenolic hydroxyl and benzene rings further enhance the reactivity of the aromatic ring C-H. It is concluded that OH radicals participate in the formation of the phenolic hydroxyl structure and catalyze the oxidation reaction of coal at low temperatures.
Article
Energy & Fuels
Lulu Fan, Xianliang Meng, Jianqiao Zhao, Yang Zhou, Ruizhi Chu, Shi Yu, Weisong Li, Guoguang Wu, Xiaofeng Jiang, Zhenyong Miao
Summary: In-depth and comprehensive analysis of reaction sites evolution during low-temperature oxidation provides important insights into the chemical reaction sequence. Through the combined use of FT-IR, XPS and C-13 NMR, changes in reaction sites were analyzed. The results show that as the oxidation temperature increases, the reactivity of methylene increases and the ratio of CH3/CH2 also increases. Before the temperature reaches 150 degrees C, the content of C-H slightly decreases while that of C-O increases. Subsequently, C-O gradually transforms into C=O. When the oxidation temperature exceeds 150 degrees C, the ratio of aliphatic carbon decreases significantly, while that of aromatic carbon and carbonyl carbon increase. The study identifies hydroxyl, methyl and methylene groups, especially the hydroxyl in the carboxyl group, as the main active site for coal oxidation at low temperatures.
Article
Energy & Fuels
Lulu Fan, Xianliang Meng, Jianqiao Zhao, Yang Zhou, Ruizhi Chu, Shi Yu, Weisong Li, Guoguang Wu, Xiaofeng Jiang, Zhenyong Miao
Summary: The main active sites for coal oxidation at low temperature are hydroxyl and methylene groups, with the hydroxyl group further oxidizing at higher temperatures and evolving into carboxyl groups.
Article
Materials Science, Multidisciplinary
Mingyu Fan, Ye Cui, Zhongwu Zhang, Liyuan Liu, Qian Li, Qun Luo
Summary: The effect of Ho addition on the oxidation behavior of Mg-Zn-Y-Ho alloys at 500 degrees C in air was investigated. Results showed that the addition of Ho can improve the high-temperature oxidation resistance of Mg-3Y-2Zn-12Ho alloys. With a 12 wt% Ho addition, the parabolic rate constant decreased by 75% compared to alloys without Ho addition. This improvement can be attributed to the formation of dense Ho2O3, which reduces the inward oxygen diffusion coefficient by 3 orders of magnitude compared to Y2O3. Additionally, the addition of Ho in the Mg-Y-Zn alloy maintained excellent tensile properties.
Article
Chemistry, Physical
Nusrat Rashid, Mohsin Ahmad Bhat, Pravin P. Ingole
Summary: This study reveals the influence of morphology, crystal orientation, and electrode/electrolyte interfacial properties on the activity and selectivity of copper electrocatalysts in carbon dioxide reduction reactions, demonstrating that dendritic copper electrocatalysts enhance ethylene production and inhibit parasitic side reactions. Moreover, the morphology of the catalyst is identified as the primary determinant of its catalytic activity.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Thermodynamics
Long Zhu, Qiang Xu, Cheng Xie, Bingzhi Liu, Hong Wang, Snehasish Panigrahy, Henry Curran, Zhandong Wang
Summary: Ozone addition is a promising method to control and enhance combustion and provides a platform to study low-temperature oxidation chemistry. This study investigates ozone-assisted low-temperature oxidation of propane and identifies the initiation of propane reaction by ozone thermal decomposition even at low temperatures. The reactivity of propane shows a maximum at 650 K and decreases in the temperature range of 650 - 740 K. The findings contribute to improving the understanding of the ozone-assisted low-temperature oxidation chemistry of alkanes.
COMBUSTION AND FLAME
(2023)
Article
Materials Science, Multidisciplinary
Boyang Liu, Fuhua Zhang, Qianlin Wu, Junhua Wang, Wenge Li, Lihua Dong, Yansheng Yin
MATERIALS CHEMISTRY AND PHYSICS
(2015)
Article
Materials Science, Multidisciplinary
Fujun Tao, Yuliang Zhang, Fuhua Zhang, Lijun Yang, Yan An, Yansheng Yin
Article
Polymer Science
Ying-jie Zhang, Xiao-feng Li, Yan An, Fu-hua Zhang, Yu-liang Zhang, Tao Liu, Li-hua Dong, Yan-sheng Yin
ACTA POLYMERICA SINICA
(2013)
Article
Chemistry, Organic
Xinfeng Wu, Ying Wang, Pingkai Jiang, Fuhua Zhang, Xiqin Zhang, Kailiang Yang
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2014)
Article
Polymer Science
Xinfeng Wu, Pingkai Jiang, Yun Zhou, Jinhong Yu, Fuhua Zhang, Lihua Dong, Yansheng Yin
JOURNAL OF APPLIED POLYMER SCIENCE
(2014)
Article
Materials Science, Multidisciplinary
Fu-Hua Zhang, Rong-Guo Wang, Xiao-Dong He, Chao Wang, Li-Ning Ren
JOURNAL OF MATERIALS SCIENCE
(2009)
Article
Materials Science, Multidisciplinary
Yuliang Zhang, Wenhua Wang, Yan An, Fuhua Zhang, Yansheng Yin, Lihua Dong
Article
Materials Science, Multidisciplinary
Boyang Liu, Haipeng Huang, Fuhua Zhang, Yun Zhou, Wenge Li, Jingwei Zhang
Article
Materials Science, Multidisciplinary
F. Zhang, Y. Zhang, T. Liu, Y. An, L. Dong, Y. Yin
MATERIALS RESEARCH INNOVATIONS
(2015)
Article
Physics, Condensed Matter
Fuhua Zhang, Lili Yang, Dengteng Ge
PHYSICA B-CONDENSED MATTER
(2009)
Article
Chemistry, Inorganic & Nuclear
X. F. Li, Y. An, Y. L. Zhang, F. H. Zhang, L. H. Dong, Y. S. Yin
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
(2013)
Article
Materials Science, Coatings & Films
T. Liu, Y. Dong, T. He, Na Guo, F. Zhang
SURFACE ENGINEERING
(2014)
Article
Chemistry, Multidisciplinary
Yuliang Zhang, Ting Xia, Kin Man Yu, Fuhua Zhang, Heng Yang, Boyang Liu, Yan An, Yansheng Yin, Xiaobo Chen
Article
Engineering, Manufacturing
Xingkai Chen, Huaiqin Xie, Hui Chen, Fuhua Zhang
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2010)
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.
