Article
Chemistry, Physical
Guangwu Yang, Hao Liu, Madi Arsakay, Jingshun Shen, Yanfeng Shen, Alisher Fatkhulloev, Rodney S. Ruoff
Summary: We achieved the synthesis of an ordered 3D microporous graphene architecture via chemical vapor deposition using zeolite as the template. The introduction of Ca2+ effectively catalyzed the growth of ZTC and reduced the growth temperature. Various synthetic parameters were investigated to improve the ZTC growth, resulting in high-quality samples with continuous single-layer carbon structures.
Article
Chemistry, Applied
Hiroyuki Itoi, Yuto Kasai, Keita Morishita, Ryutaro Suzuki, Yuka Gotoh, Chika Matsuoka, Masahiro Miyaji, Rikuto Hirade, Yuichiro Tanabe, Hiroyuki Iwata, Yoshimi Ohzawa
Summary: The use of NaY zeolite as a template allows for the efficient synthesis of porous ZTC with a high surface area, providing a simpler and more feasible method compared to previous approaches.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Ying Liu, Jiaxin Wang, Mohamed A. Serageldin, Tao Wang, Wei-Ping Pan
Summary: The study investigated the impact of CVD time and temperature on the structure of pyrolytic carbon in ZCP synthesis, confirming that pyrolytic carbon is mainly connected by C-C and C--C bonds, while some graphitic carbon forms on the zeolite surface. The experimental results from TGA and mass spectrometer analysis provided valuable insights for designing and optimizing CVD processes for ZCP synthesis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Ying Liu, Tao Wang, Jiawei Wang, Wei-Ping Pan
Summary: Reducing the particle size of the zeolite template enhances both inward and outward mass transport during zeolite-templated CVD, improving the structural properties of ZTC. Inward diffusion of the carbon precursor is enhanced in smaller zeolite particles, leading to more uniform deposition of pyrolytic carbon inside the zeolite.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Shuang Tan, Chunxu Wang, Yann Foucaud, Michael Badawi, Hailing Guo, Kun Sun, Ge Yang, Svetlana Mintova
Summary: A zeolite-templated carbon material with outstanding properties was synthesized using a vapor phase impregnation method. The properties of the material were optimized through controlled deposition, and it exhibited excellent performance in a sodium battery setup.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Peng-Xiang Hou, Feng Zhang, Lili Zhang, Chang Liu, Hui-Ming Cheng
Summary: The FCCVD is an important technique for synthesizing high-quality CNTs with various morphologies, offering advantages of simplicity, controllability, and scalability. Researchers review the controlled growth, properties, and applications of CNTs, discussing key challenges and prospects for the future.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Daniil A. Ilatovskii, Evgeniia P. Gilshtein, Olga E. Glukhova, Albert G. Nasibulin
Summary: This article analyzes the latest research achievements in the optoelectronic performance of transparent conducting films (TCFs) based on single-walled carbon nanotubes (SWCNTs), and briefly reviews various methods for evaluating the performance of transparent electrodes. The article also describes a roadmap for further research and development of transparent conductors using rational design.
Article
Chemistry, Physical
Kaicheng Jia, Ziteng Ma, Wendong Wang, Yongliang Wen, Huanxin Li, Yeshu Zhu, Jiawei Yang, Yuqing Song, Jiaxin Shao, Xiaoting Liu, Qi Lu, Yixuan Zhao, Jianbo Yin, Luzhao Sun, Hailin Peng, Jincan Zhang, Li Lin, Zhongfan Liu
Summary: Chemical vapor deposition is a promising method for controlled growth of high-quality graphene films. Cold-wall CVD system has the potential for industrial-scale production, but the quality of graphene is still limited. This study presents an efficient method for batch synthesis of high-quality graphene films with millimeter-sized domains.
Article
Nanoscience & Nanotechnology
Kishan Thodkar, Fabian Gramm
Summary: The high field-effect mobility and two-dimensional nature of graphene films make it a promising material for developing sensitive sensors with low power consumption. The chemical vapor deposition process allows scalable production of high-quality graphene films. This study presents a simplified fabrication process to develop suspended chemical vapor deposition graphene devices with enhanced field-effect mobility operating at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yajuan Xie, Chengwen Tan, Xiaodong Yu, Zhihua Nie, Zhichao Liu
Summary: In this study, tungsten coatings were deposited at 300-610 degrees C from WF6 and H-2 by atmospheric pressure chemical vapor deposition (APCVD). It was found that regardless of the density of the coating, tungsten powders adhered to the furnace walls. These powders were produced by homogeneous reactions in the gas phase near the substrate and adhered to the inner wall of the furnace as they moved with the fluid. The study discussed the kinetics, structure, and growth mode of tungsten coatings in the APCVD system, highlighting the contributions of homogeneous reactions to the growth of dense tungsten coatings.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Ali Mazaheri, Mohammad Javadi, Yaser Abdi
Summary: Use of diborane pyrolysis as a boron source enabled growth of atomic-thickness borophene sheets through chemical vapor deposition. Systematic studies on temperature, deposition rate, and pressure effects on 2D boron sheets growth were conducted, along with detailed analyses on morphology and crystalline phase. CVD-grown borophene layers exhibited an average thickness of 4.2 angstrom, chi(3) crystalline structure, and metallic conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Agricultural Engineering
Cao Tu, Weihua Luo, Yuting Peng, Peng Yu, Chuangqi Shi, Zhiping Wu, Lishu Shao, Peng Zhan
Summary: In this study, a feasible method for the preparation of lignin-based carbon nanotubes (L-CNTs) using lignin as the carbon source based on mobile chemical vapor deposition is proposed. Lignin-based micelles were used as a soft template to prepare a catalyst, and then L-CNTs were synthesized from gaseous products generated by lignin pyrolysis. By adjusting the reaction conditions, L-CNTs with diameters ranging from 10 to 110 nm and lengths ranging from 1 to 6 & mu;m were obtained. The synthesized L-CNTs were mainly multi-walled carbon nanotubes, of which the crystal layer spacing was 0.35 nm, with a good graphitization degree and thermal stability, providing a new method for the high-value utilization of lignin.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Jinghan Yuan, Yoshimasa Amano, Motoi Machida
Summary: The mesoporous activated carbon derived from moso biomass was modified to efficiently remove aqueous phase nitrate ions, showing excellent adsorption capacity and rate. The optimal modified activated carbon exhibited rapid adsorption equilibrium within 8 minutes, with a high nitrate adsorption capacity at pH 3, as analyzed using pseudo-first-order and pseudo-second-order models.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Applied
J. Jahandideh, A. Hafizi, M. R. Rahimpour
Summary: This study investigates the optimal procedure for template-free synthesis of zeolite Y using inexpensive sources by exploring various synthesis parameters. The obtained catalysts show significant activity and selectivity for the production of linear alkylbenzenes, with the HY catalyst achieving the highest 1-decene conversion and selectivity.
TOPICS IN CATALYSIS
(2021)
Article
Engineering, Environmental
Dongliang Wu, Zhiqiang Yao, Xiuying Sun, Xiaodong Liu, Lei Liu, Ruliang Zhang, Chengguo Wang
Summary: The study investigated the distribution of metal catalyst on carbon fiber surface using the Platform effect of polydopamine (PDA). Through PDA-based carbon coating, directional Carbon nanotubes (CNTs) were grown on high strength carbon fibers, enhancing mechanical properties and developing interface theory of Carbon fiber reinforced plastic (CFRP).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Yinan Lu, Yinpei Zhu, Youhong Zhang, Kean Wang
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2019)
Article
Engineering, Chemical
Shaihroz Khan, Kean Wang, Xianshe Feng, Ali Elkamel
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Engineering, Chemical
Zhou He, Kheng Lim Goh, Xianshe Feng, Kean Wang
Summary: A novel time-lag technique has been developed to measure the permeation properties of gas mixtures by selectively depositing one gas component in a binary mixture using a liquid nitrogen cold trap. The true permeation properties of binary mixtures were found to be significantly different from ideal values, and the method is efficient for gas mixtures with large differences in boiling points.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Xiaotong Cao, Kean Wang, Xianshe Feng
Summary: This study focused on the removal of phenolic compounds from water using perstraction, with PEBA membranes showing excellent permeability to phenolics. The research revealed that the membrane had significant resistance to phenol desorption, which could be reduced with the use of an alkaline stripping agent. Enhancement in mass transfer rate was affected by the alkaline concentration, particularly significant with thin membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xiaotong Cao, Kean Wang, Xianshe Feng
Summary: This study focused on the separation of phenolic compounds using a PEBA membrane, showing that permeation flux increased with higher feed concentrations, but the increase was less than proportional, leading to a decrease in enrichment factor. Additionally, both permeation flux and enrichment factor increased with higher temperatures. Different phenolic compounds exhibited varying permeabilities in the membrane.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Applied
Taofeeqah A. Agbaje, Swati Singh, K. Suresh Kumar Reddy, Kyriaki Polychronopoulou, Lourdes F. Vega, Maryam Khaleel, Kean Wang, Georgios N. Karanikolos
Summary: The Cu-BTC (HKUST-1) metal-organic framework prepared using a copper mesh as the metal source exhibits high CO2 adsorption capacity and efficiency, with potential for cost-effective and environmentally-friendly scaled-up production of highly efficient porous materials for gas adsorption applications in the future.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Youhong Zhang, Yinpei Zhu, Leslie S. Loo, Jianguo Yin, Kean Wang
Summary: Molecularly imprinted polymer beads imprinted with vitamin E were synthesized using a two-step swelling polymerization method, showing excellent adsorption performance.
Review
Environmental Sciences
Yang Yang, Xiaofeng Jiang, Kheng Lim Goh, Kean Wang
Summary: This paper reviewed the recent progress on utilizing various natural/biomass materials for the separation of oily water mixtures/emulsions and demonstrated that natural sand filtration technology is promising with high separation efficiency and stability.
Review
Engineering, Chemical
Taofeeqah A. Agbaje, Lourdes F. Vega, Maryam Khaleel, Kean Wang, Georgios N. Karanikolos
Summary: C4 hydrocarbons are important fractions in the oil and gas processing industry, and traditional methods for their separation face challenges. Therefore, new technologies such as membranes and adsorption are being actively explored as efficient, economical, and energy-saving alternatives for the separation of C4 hydrocarbons.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Engineering, Chemical
Fahmi Anwar, Maryam Khaleel, Kean Wang, Georgios N. Karanikolos
Summary: Ethylene, a crucial feedstock for key compounds like polymers, is mainly produced from naphtha steam cracking, but unwanted traces of ethane are present. Energy-intensive methods are used to obtain pure ethylene, making the development of materials for ethylene-ethane separation by adsorption important yet challenging due to the compounds' similar properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Xiaotong Cao, Kean Wang, Xianshe Feng
Summary: In this study, zeolitic imidazolate framework (ZIF-71) crystals were incorporated into poly(ether-block-amide) (PEBA) to form mixed matrix membranes (MMMs) for the pervaporative removal of phenol and aniline from their aqueous solutions. The results showed that the ZIF-71/PEBA MMMs exhibited good compatibility and enhanced selectivity for phenol and aniline separation. The study highlights the potential application of ZIF-71/PEBA MMMs as organophilic membranes for efficient removal of aromatic contaminants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Maryam Khaleel, Zhou He, Georgios N. Karanikolos, Xianshe Feng, Kean Wang
Summary: This paper investigates the permeation properties of binary gas mixtures through a carbon molecular sieve membrane and finds a significant correlation between the permeation properties and gas composition. The study also reveals that the 'true' permeation properties of the membrane deviate from 'ideal' values and exhibit concentration-dependent selectivity. This dependence can be modeled and analyzed using the Maxwell-Stefan Equation.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Engineering, Environmental
Baosong Li, Fatima Mumtaz, Xuan Li, Maryam R. Al Shehhi, Kean Wang
Summary: A highly flexible and crosslinked chitosan film embedded with g-C3N4@Ag (CN@Ag) nanosheets and AgCl nanoparticles was prepared as an efficient adsorbent for removing iodide ions (I-) in nuclear wastewater. The adsorption performance of the composite film for 127I anions (to mimic radioactive iodine) was investigated in detail. The adsorbent showed high I-removal efficiency over a wide range of pH, and the adsorption capacity was more than doubled compared to the crosslinked pristine chitosan film. The adsorption mechanism involved physisorption, chemisorption, and chemical reaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Fahmi Anwar, K. Suresh Kumar Reddy, Anish Mathai Varghese, Maryam Khaleel, Kean Wang, Georgios N. Karanikolos
Summary: Paraffin-selective adsorbents for ethane/ethylene separation were developed using surface-functionalized mesoporous silica adsorbents. The adsorbents exhibited reverse selectivity, becoming paraffin-selective due to enhanced van der Waal's interactions between the grafted ionic liquids and ethane. Various silica-based adsorbents functionalized with different loadings, anion, and cation types were synthesized and characterized. The adsorbents showed stable performance in pressure swing adsorption and breakthrough cyclic testing, with a breakthrough ethylene productivity of up to 1.2 mmol/g and a breakthrough selectivity of 2.4.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Chenfeng Ku, Youhong Zhang, Guohong Zhou, Kean Wang
Summary: Molecularly imprinted polymers (MIPs) were synthesized via precipitation polymerization for selective adsorption of morphine. The MIP with optimal performance was obtained by adjusting synthesis conditions. It showed high adsorption capacity, reusability, and stability in acetonitrile solution.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
