Article
Chemistry, Multidisciplinary
Antonia Herzog, Arno Bergmann, Hyo Sang Jeon, Janis Timoshenko, Stefanie Kuehl, Clara Rettenmaier, Mauricio Lopez Luna, Felix T. Haase, Beatriz Roldan Cuenya
Summary: Covering Cu2O nanocubes with Ag nanoparticles can enhance the Faradaic efficiency of CO2 electrochemical reduction reaction for C2+ liquid products. Partial reduction of Cu2O and reaction-driven redispersion of Ag on CuOx were observed during CO2RR, indicating the importance of Ag-Cu sites for C-C coupling and enhanced liquid product yield.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Hui Xu, Justin Easa, Sarah G. Pate, Renxi Jin, Casey P. O'Brien
Summary: This work describes a new operando surface enhanced Raman spectroscopy (SERS) platform that enables the direct correlation of membrane structure to its performance under realistic operating conditions. It also establishes the mechanism of CO2 facilitated transport across polyvinylamine (PVAm) and provides a new operando SERS platform for a wide range of polymer membrane systems.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Lei Ouyang, Tobias Meyer-Zedler, Kel-Meng See, Wei-Liang Chen, Fan-Cheng Lin, Denis Akimov, Sadaf Ehtesabi, Martin Richter, Michael Schmitt, Yu-Ming Chang, Stefanie Grafe, Jurgen Popp, Jer-Shing Huang
Summary: This study investigates the enhancement effect of plasmonic gratings in nonlinear surface-enhanced coherent anti-Stokes Raman scattering (SECARS) using the platform of plasmonic Doppler grating (PDG). The PDGs spatially separate the input and output enhancement, allowing for observation and comparison of overall enhancement from different combinations of individual input and output beams. The results indicate that enhancement in the pump and anti-Stokes beams plays a more critical role in the overall enhancement than that in the Stokes beam.
Article
Chemistry, Physical
Kevin Wonner, Steffen Murke, Serena R. Alfarano, Pouya Hosseini, Martina Havenith, Kristina Tschulik
Summary: This study aims to investigate the influence of capping agents on nanoparticle reactions, focusing on the commonly used capping agents citrate and polyvinylpyrrolidone (PVP). The results reveal the changes in the surface properties of silver nanoparticles (AgNPs) caused by the different behavior of the capping agents, and demonstrate the use of spectro-electrochemical surface-enhanced Raman spectroscopy (SERS) to track nanoparticle conversions in liquid media. The study highlights the importance of understanding the fate of nanoparticles in complex liquid environments.
Article
Chemistry, Multidisciplinary
Qiong Liu, Xia-Guang Zhang, Zi-Yu Du, Can-Jun Zou, Huan-Yu Chen, Yu Zhao, Jin-Chao Dong, Ping-Ping Fang, Jian-Feng Li
Summary: Electrochemical conversion of CO2 into liquid fuels is an efficient way to store renewable energy, but converting CO2 to ethanol remains challenging due to low activity and selectivity. This study demonstrates that partially oxidized Ag nanowires can achieve a high Faradaic efficiency of 85% for CO2 electroreduction, surpassing Cu. The presence of CO intermediates on the partially oxidized Ag nanowires promotes ethanol formation.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Fabiane C. Ballotin, Thomas Hartman, Joris Koek, Robin G. Geitenbeek, Bert M. Weckhuysen
Summary: The study utilized operando SHINERS with on-line mass spectrometry to investigate the reaction mechanism and product formation over Rh-based catalysts, revealing the tunable selectivity under different reaction conditions and the absence of reaction products in the absence of Rh catalyst.
Article
Biochemistry & Molecular Biology
Eric Boateng Osei, Liliia Paniushkina, Konrad Wilhelm, Juergen Popp, Irina Nazarenko, Christoph Krafft
Summary: Extracellular vesicles (EVs) ranging in size from 60 to 800 nm were isolated from plasma of control and prostate cancer patients using differential centrifugation and ultrafiltration techniques. Spontaneous Raman and surface-enhanced Raman spectroscopy (SERS) were employed to identify fractions that best discriminate between control and cancer patients, with results showing that EV12 and EV120 fractions provide the most effective separation.
Article
Multidisciplinary Sciences
Likun Gao, Xun Cui, Zewei Wang, Christopher D. Sewell, Zili Li, Shuang Liang, Mingyue Zhang, Jian Li, Yingjie Hu, Zhiqun Lin
Summary: The study demonstrates the utilization of spinel nanoparticles for enhanced oxygen evolution reaction activity through photothermal effect, providing a promising platform for future advances in electrocatalysis. Operando Raman and DFT studies confirm the surface reconstruction into electrocatalytically active sites, reducing the kinetics barrier and allowing for lower overpotentials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Shu Hu, Jingyu Wang, Yue-Jiao Zhang, Bao-Ying Wen, Si-Si Wu, Petar M. Radjenovic, Zhilin Yang, Bin Ren, Jian-Feng Li
Summary: In this study, the shell and structural effect of shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) were investigated. It was found that the field enhancement loss due to the shell could be overcome by optimizing the coupling geometry of the shell-isolated nanoparticles (SHINs), and signal enhancement could be further optimized by altering the aggregation geometries of the nanoparticles.
Article
Physics, Applied
Christoph Baeumer
Summary: Interface science is crucial for understanding and optimizing energy and information technologies. Detailed operando characterization is necessary as interface properties change during operation. Interface-sensitivity remains a major concern in available techniques.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Gary Sean Cooney, David Talaga, Vicky Ury-Thiery, Yann Fichou, Yuhan Huang, Sophie Lecomte, Sebastien Bonhommeau
Summary: In this study, TERS was used to visualize the spatial distribution of adenine, protein secondary structure, and amino acids in single polyadenosine-induced tau fibrils. The findings provide insights into the incorporation of the polyadenosine cofactor in the fibril structure and its interaction with amino acids. TERS proves to be a powerful technique for studying cofactors in individual tau fibrils and their mode of interaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Engineering, Environmental
Lifang Xie, Kedong Gong, Yangyang Liu, Liwu Zhang
Summary: Nanoplastics, at sizes smaller than 1000 nm, are found ubiquitously in various environmental media and pose a potential health risk due to their ability to easily enter cells. In this review, we summarize the prevalent analytical techniques for identifying nanoplastics, with a focus on the advantages and disadvantages of surface-enhanced Raman spectroscopy (SERS). We discuss the principles of SERS, advances in nanoplastic detection using SERS, and the application of SERS in real environmental samples. Furthermore, we highlight the importance of efficient SERS substrates and pretreatment methodologies to enable practical nanoplastic detection and identify future research needs in this field.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Damien A. Lieber, Christopher P. Goyne, Robert D. Rockwell, Clayton M. Geipel, Harsha K. Chelliah
Summary: This study presents the design, additive manufacturing, and testing of a small-scale cavity flameholder for high-speed premixed ethylene combustion. The effects of flow compressibility and heat release on turbulent flame structures and stabilization mechanisms are comprehensively studied. The final design allows for sustained ethylene flame for over an hour of repeated cycles.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Limei Liu, Pablo Martinez Pancorbo, Ting-Hui Xiao, Saya Noguchi, Machiko Marumi, Hiroki Segawa, Siddhant Karhadkar, Julia Gala de Pablo, Kotaro Hiramatsu, Yasutaka Kitahama, Tamitake Itoh, Junle Qu, Kuniharu Takei, Keisuke Goda
Summary: Over the past two decades, wearable sensor technology has experienced significant growth. One recent breakthrough is the development of wearable chemical sensors based on surface-enhanced Raman spectroscopy (SERS), which can universally and noninvasively detect molecular fingerprints. However, these sensors are not scalable due to their complex fabrication process and limited multifunctional sensing capabilities. A highly scalable, wearable SERS sensor based on a low-cost, ultrathin, flexible, stretchable, adhesive, and biointegratable gold nanomesh is demonstrated in this study. It can be worn on any surface and used for label-free, large-scale, in situ sensing of diverse analytes. To showcase its practical utility, the sensor is tested for the detection of sweat biomarkers, drugs of abuse, and microplastics. This wearable SERS sensor represents a significant step towards the generalizability and practicality of wearable sensing technology.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Yumin Zhang, Ruoyu Chen, Fugang Liu, Peng Miao, Li Lin, Jian Ye
Summary: The detection of deep-seated lesions is challenging due to the strong photon absorption and scattering of biological tissues. In this work, the combination of ultra-bright SERS nanotags and TRS is used to achieve non-invasive and photosafe detection of phantom lesions hidden in biological tissues. The results demonstrate the potential of transmission Raman-guided identification and non-invasive imaging for clinically safe cancer diagnoses.
Article
Chemistry, Applied
Sepideh Badehbakhsh, Nooshin Saadatkhah, Mohammad Jaber Darabi Mahboub, Olga Guerrero-Perez, Gregory S. Patience
Summary: Vanadyl pyrophosphate (VPP) is an active catalyst for the conversion of n-butane to maleic anhydride. The DuPont's circulating fluidized bed (CFB) uses the Mars van-Krevelen reaction mechanism, but requires oxygen to maintain high activity and selectivity. However, the high temperature and oxygen concentration in the CFB lead to catalyst deactivation and formation of new bonds.
Article
Chemistry, Physical
Abdulaziz Aldureid, Francisco Medina, Gregory S. Patience, Daniel Montane
Summary: Hydrogenation of furfural is an important process in the synthesis of bio-based chemicals, and copper-based catalysts show good activity and stability in converting furfural to alcohols. In this study, Ni-Cu/Al2O3 hydrogenation catalysts derived from layered double hydroxides (LDHs) were prepared and their activity and selectivity were evaluated under different conditions.
Review
Engineering, Chemical
Kaiqiao Wu, Federico Galli, Jacopo de Tommaso, Gregory S. Patience, J. Ruud van Ommen
Summary: Pressure and temperature are crucial variables for monitoring physicochemical processes, detecting anomalies, and verifying flow parameters. Pressure fluctuations can indicate regime changes and flow anomalies, and pressure signals are used for alarms and safety interlocks. Precise installation and calibration of pressure gauges maximize information acquisition.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Engineering, Chemical
Yanfa Zhuang, Nooshin Saadatkhah, Mahdi Salehi Morgani, Tianhuai Xu, Charlie Martin, Gregory S. Patience, Abdellah Ajji
Summary: Reactive extrusion (REX) is a manufacturing technique that combines melt extrusion with chemical reactions. It offers the advantage of operating solvent-free in a single step, simplifying downstream separation and reducing costs. However, the short residence times of extruders limit their applications to fast reactions.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Engineering, Chemical
Laurens Van Hoecke, Dieter Boeye, Arturo Gonzalez-Quiroga, Gregory S. Patience, Patrice Perreault
Summary: Computational fluid dynamics (CFD) is the application of numerical methods to solve fluid flow problems. It is widely used in chemical engineering for various applications such as heat transfer, mass transfer, and combustion. This article reviews the basic theoretical concepts of CFD and demonstrates a simulation example using the open-source software OpenFOAM. The simulation results can be improved by increasing the number of cells.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Nanoscience & Nanotechnology
Ewelina Wyrzykowska, Alicja Mikolajczyk, Iseult Lynch, Nina Jeliazkova, Nikolay Kochev, Haralambos Sarimveis, Philip Doganis, Pantelis Karatzas, Antreas Afantitis, Georgia Melagraki, Angela Serra, Dario Greco, Julia Subbotina, Vladimir Lobaskin, Miguel A. Banares, Eugenia Valsami-Jones, Karolina Jagiello, Tomasz Puzyn
Summary: This Review discusses the importance of a comprehensive system for defining nanomaterial descriptors in enabling a safe-and-sustainable-by-design concept for engineered nanomaterials. The unique nanoscale properties of engineered nanomaterials can pose risks to human health and the environment, making it crucial to design new nanomaterials with safety and sustainability in mind. Physicochemical characteristics, such as chemical composition and size, play a key role in the biological activity of nanomaterials, and nanodescriptors can be used to optimize their functionality and minimize health and environmental hazards. The successful integration of experimental data and computational models is essential for the safe adoption of nanomaterials on a large scale.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Ana Serrano-Lotina, Karen Cruz, Miguel A. Banares, Marco Daturi, Pedro Avila
Summary: Bimetallic shaped catalysts were prepared by wet equilibrium impregnation, where MnO2 was the main component and a second metal oxide (Co, Fe and Ce oxides) was added. The Ce-promoted catalyst showed the highest catalytic activity in the selective reduction of NOx with NH3 (88% NO conversion at 170 degrees C) due to its ability to adsorb NOx even in the presence of water. However, the Fe-promoted catalyst exhibited lower NOx conversion with NH3-SCR in the presence of water (65% NO conversion at 170 degrees C) due to the absence of NOx adsorbed species.
APPLIED SURFACE SCIENCE
(2023)
Review
Engineering, Chemical
Yu-Xiang Song, Alexandra Furtos, Domenico Fuoco, Yacine Boumghar, Gregory S. Patience
Summary: Projected revenues of cannabis concentrates and extracts in Canada will reach $5 billion, with infused products accounting for half of the total. Optimizing cannabis processing techniques is necessary to develop cost-effective drug formulations. Recent advancements in green solvent extraction methods, such as supercritical fluid extraction, provide safer and more efficient ways to extract and isolate the active metabolites of Cannabis sativa L.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Olga V. Chub, Jean-Luc Dubois, Gregory S. Patience
Summary: The depolymerization of PMMA to MMA is costly due to the separation of byproducts, so the hydrolysis of MMA to MAA is a more economical alternative. Zeolites, with their Bronsted acidity, can catalyze the gas-phase route to acids. In this study, the hydrolysis kinetics of MMA to MAA over a Y/SiO2 zeolite were investigated. The MMA conversion was high, especially when operating the reactor in excess water vapor.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Chemical
Emilie Thibault, Moncef Chioua, Maxime McKay, Milan Korbel, Gregory S. Patience, Paul R. Stuart
Summary: Industrial facilities collect, store, and interpret large volumes of data for decision-making. This data is often contaminated by various errors, especially from unreliable instruments, which can be corrected using signal processing methods. In this study, experts in the pulp and paper industry were interviewed to understand the application of signal processing in decision-making, highlighting the value of process data, their usage, and the barriers preventing their full utilization. The interviews revealed that decisions in industry are primarily based on steady-state process data, and challenges include resource limitations, cultural barriers, and limited access to advanced technology. In practice, experts focus on interpreting steady-state process models that facilitate better decision-making.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
M. Olga Guerrero-Perez, Olga B. Lapina, Soren B. Rasmussen, Miguel A. Banares
Summary: Nanoscaled-VPO catalysts were prepared on an alumina support to achieve high surface-to-volume ratio of the active phase. Surface species transformations were studied using these nanoscaled catalysts, with minimized signal from the bulk. The chemical environment and oxidation state of the species were determined by NMR, ESR, and XANES spectroscopies. The results optimized V + P coverage and V/P molar ratio to minimize isolated vanadium oxide species and maximize V4+ concentration. The distribution of phosphorus islands greatly influenced the structure of the catalytic material for the desired partial oxidation reaction.
TOPICS IN CATALYSIS
(2023)
Article
Engineering, Chemical
Gregory S. Patience, Yanet Villasana, Bruno Blais
Summary: Poster sessions are popular informal forums for sharing emerging scientific results and encouraging discussions on methodology, problems, and solutions. However, when there are too many posters, cognitive overload occurs and attendance is lower compared to presentations. Poster competitions, scoring schemes, and motivated judges are needed to identify the top posters.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Engineering, Chemical
Dalma Schieppati, Nicolas A. Patience, Federico Galli, Pierre Dal, Insa Seck, Gregory S. Patience, Domenico Fuoco, Xavier Banquy, Daria C. Boffito
Summary: This review focuses on the chemical and biological extraction methods for lignin to promote its utilization. A range of extraction methods are discussed, including sulfite pulping, Kraft, Organosolv, ozonolysis, steam-explosion, ionic-liquids and supercritical CO2 extraction, and microwave- and ultrasound-assisted extraction. Biological methods, such as bacterial, fungal, and enzymatic delignification, are also explored. The review aims to provide insights to tailor extraction methods to individual needs and promote the sustainable utilization of lignocellulosic biomass.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Mahdi Sharifian, Federico Galli, Bill Timbers, Nicolas Hudon, Gregory S. Patience
Summary: Laboratory hydrogen generators, medical oxygen, and micro-breweries are successful examples of modular and micro technologies. The operation of these facilities requires different levels of expertise, with more complex processes needing highly qualified personnel. Applying a method known as Failure Mode Risk Decision (FMRD), this study proposes a comprehensive hazards analysis to evaluate the risks of a micro-refinery unit (MRU) converting wasted natural gas. Combining a systematic methodology and numerical risk assessment, the proposed approach provides a comprehensive evaluation of hazardous conditions and a direct correlation between the magnitude of a potential hazard and the risk level.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Engineering, Chemical
Hinane Boumghar, Mathieu Sarrazin, Xavier Banquy, Daria C. Boffito, Gregory S. Patience, Yacine Boumghar
Summary: Research on cannabis oil has expanded to include its potential use in the pharmaceutical industry for treating diseases such as Alzheimer's, auto-immune disorders, and cancer. Cannabinoids such as THC, CBG, and CBN have shown promise in relieving neuropathic pain and boosting the immune system. By using supercritical CO2 extraction, we obtained a total yield of approximately 26%, with THC and CBG reaching maximum yields after 2 hours at specific parameters, and CBN reaching a yield of 2.4g/100g after an additional 2 hours of extraction. The regression analysis identified pressure and time as significant factors for total yield, while pressure was the only significant factor for THC and CBG, and time, temperature, pressure, and flow rate were significant factors for CBN.