Article
Chemistry, Physical
Juan Wu, Hongfei Wang, Jun Qiu, Kefu Zhang, Jingwen Shao, Lifeng Yan
Summary: The electrochemical exfoliation of graphene is an efficient and scalable method with advantages of low cost and environmental friendliness. By simultaneously conducting ion intercalation and microwave irradiation at both the anode and cathode, graphene can be successfully prepared with few-layer features, large sizes, low oxygen content, and minimal defects. The high yields and potential for large-scale production make this method a promising choice for commercial preparation of green and low-cost graphene.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Iman Khakpour, Amin Rabiei Baboukani, Anis Allagui, Ahmed Amine Hachicha, Chunlei Wang
Summary: A novel modified BPE system was designed to investigate the contributions of anodic/cathodic exfoliation and deposition of graphene, revealing that both exfoliation processes could occur regardless of the type of polarization, but the morphology and deposition rate were highly dependent on the polarization. Additionally, graphene produced by anodic exfoliation showed higher levels of oxidation compared to that produced by cathodic exfoliation.
Article
Engineering, Chemical
Yanan Ning, Kai Li, Zekun Zhao, Dong Chen, Yifan Li, Yijie Liu, Qipeng Yang, Bo Jiang
Summary: An electrochemical system was developed for the degradation of organophosphorus pesticide acephate and simultaneous recovery of phosphorus, with increased efficiency at higher current density. Factors such as solution pH, Mg²⁺, bicarbonate, and Cl⁻ all have an impact on phosphorus recovery efficiency.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Environmental
Yuan Zhang, Youlong Xu, Ruizhuo Liu, Yao Niu
Summary: In this study, a fast electrochemical anode and cathode co-exfoliation method was proposed to synthesize high-yield solution-processable graphene with uniform thickness distribution, low defect density, and exceptional electrical conductivity. The scalable process achieved record high production rates and offers great potential applications in wearable electronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Weilu Yang, Nihal Oturan, Jialin Liang, Mehmet A. Oturan
Summary: This study investigated the efficiency of the electro-Fenton (EF) process with a boron-doped diamond (BDD) anode and an electrochemically exfoliated graphene-based cathode (EEGr) for the removal of ofloxacin (OFLO) from contaminated water. The EF-BDD process improved the decay kinetics of OFLO by 1.4-2.6 times and reduced disposal costs by 28%-41% compared to the anodic oxidation (AO) process with BDD anode. The simultaneous generation of homogeneous (center dot OH) and heterogeneous (BDD(center dot OH)) hydroxyl radicals in the EF-BDD process contributed to its superior performance for mineralization of OFLO. The EF-BDD process showed potential for the oxidative degradation of OFLO and other antibiotic organic pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Biotechnology & Applied Microbiology
Bernardino Virdis, Robert D. Hoelzle, Angela Marchetti, Santiago T. Boto, Miriam A. Rosenbaum, Ramiro Blasco-Gomez, Sebastia Puig, Stefano Freguia, Marianna Villano
Summary: The market of biobased products obtained through fermentation processes has been growing steadily due to the demand for a decarbonized economy. However, the economic viability of industrial fermentation is hindered by low product titers and selectivity. Electrofermentation, as an innovative approach, can address these challenges by altering the yield, titer, concentration, or product distribution in traditional fermentation processes. Yet, the molecular and biochemical basis of electrofermentation is still largely unknown.
BIOTECHNOLOGY ADVANCES
(2022)
Article
Energy & Fuels
Allan J. M. Araujo, Francisco J. A. Loureiro, Laura I. Holz, Vanessa C. D. Graca, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: This article analyzes the electrode performance of misfit-layered calcium cobaltite as a cathode and anode for solid oxide fuel cell and solid oxide electrolysis cell, respectively, using electrochemical impedance spectroscopy. The addition of Ce0.8Gd0.2O2-delta as a composite electrode phase significantly improves the electrochemical processes and reduces the polarization resistance. Short-term stability testing demonstrates that the composite material shows stable current density and no observable microstructure delamination at 700°C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Martin Otero-Lema, Pablo Martinez-Crespo, Trinidad Mendez-Morales, Hadrian Montes-Campos, Luis M. Varela
Summary: In this paper, classical Molecular Dynamics simulations were used to study the interfacial structure of two ternary mixtures based on protic and aprotic ionic liquids. The simulations revealed the evolution of density profiles and the adsorption behavior of ions at charged interfaces. The results also showed the formation of a dense layer of solvent molecules at the interface. The influence of hydrogen bonds in differentiating between protic and aprotic mixtures was highlighted.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Ricardo F. Brocenschi, Kallyni Irikura, Naihara Wachter, Greg M. Swain, Romeu C. Rocha-Filho
Summary: This study reports on the electropolishing of boron-doped diamond (BDD) electrodes in the presence of acetic and sulfuric acid. The electropolishing treatment resulted in a smoother diamond surface with reduced non-diamond carbon impurity content and increased surface oxygen content. The combination of electropolishing and cathodic pretreatment further decreased the surface oxygen content and improved the electrochemical reversibility and electron-transfer kinetics of the BDD electrodes. Electropolished BDD electrodes also exhibited a higher oxidation peak potential for ascorbic acid compared to as-received BDD electrodes, indicating a decrease in surface carbon-oxygen functional groups.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Jeanette Veronica Carrera-Cevallos, Dorian Prato-Garcia, Patricio Javier Espinoza-Montero, Ruben Vasquez-Medrano
Summary: The study showed that higher current densities can improve the biodegradability of effluent, but with an increase in glyphosate concentration, the impact of current density or treatment time on biodegradability decreases.
WATER AIR AND SOIL POLLUTION
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Subhadeep Mondal, Philippe Traore, Anandaroop Bhattacharya, Alberto Perez, Pedro Angel Vazquez
Summary: This work focuses on the characterization of subcritical electroconvection instability in two plane layers of miscible dielectric liquids under strong unipolar injection. The study shows that electroconvection is an effective method to increase mixing between the liquids. The Lacey index, which indicates the level of mixing, is directly influenced by the electrical Rayleigh number. Linear and non-linear instability criteria are determined, and a hysteresis loop is observed. Additionally, the study reveals an intriguing phenomenon in the time evolution of the maximum velocity in the domain.
2022 IEEE 21ST INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL)
(2022)
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.