Article
Chemistry, Multidisciplinary
Lei Zhang, Jia Cui, Yue Zhang, Xiaoguang San, Dan Meng
Summary: To enhance the conversion and selectivity of CO2 hydrogenation to methanol, a novel floral CuO-ZnO@ZIF-8 catalyst was prepared. This catalyst has abundant oxygen vacancies and CO2 adsorption capacity, which activate the reaction intermediate and reduce the energy barrier, thus improving the selectivity of CO2 hydrogenation to CH3OH.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Nikola L. Drenchev, Boris L. Shivachev, Lubomir D. Dimitrov, Konstantin I. Hadjiivanov
Summary: Efficient CO2 capture materials should have high adsorption capacity, suitable CO2 adsorption enthalpy, and resistance to water vapor. This study investigates the effect of water on CO2 adsorption and identifies various mixed ligand complexes formed in the presence of water. The results show that water in moderate amounts does not block CO2 adsorption sites. Evaluation: 8/10
Article
Engineering, Environmental
Jusni Manidar Lumban Gaol, Toyoko Imae
Summary: ZnO of different sizes were synthesized by irradiating femtosecond pulse laser, and physically mixed with CuO to form CuO/ZnO nanocomposites embedded in chitosan film. The CuO/ZnO/CS nanocomposite showed excellent catalytic activity in the photocatalytic conversion of CO2 to methanol. The film-type system consisting of chitosan holds promise as a biocompatible reactor with facile production procedure and efficient catalytic treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
T. Bhowmick, A. Ghosh, S. Nag, S. B. Majumder
Summary: A CuO/ZnO bilayer thin film was developed for sensitive and selective detection of CO2 gas. The adsorption behavior of CO2 on the heterogenous C/Z bilayer thin-film sensor was investigated, and the theoretical analysis of the adsorption model provided insights into the activation energy and heat of adsorption of CO2 gas. The study elucidated the CO2 sensing mechanism based on surface defects for CuO and ZnO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
E. Luevano-Hipolito, Leticia M. Torres-Martinez, A. Fernandez-Trujillo
Summary: The design of an n-p heterojunction based on ZnO/CuO in a zeolitic framework led to improved light absorption, charge transfer efficiency, and availability of active sites for photocatalytic reactions. The resulting ZnO/CuO/NAS composite showed higher H-2 and HCOOH evolution rates, attributed to synergistic effects among ZnO, CuO, and NAS framework. A proposed mechanism for the photocatalytic reaction explains these results.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Physical
Ziluo Ding, Yamei Xu, Qiuchen Yang, Ruijun Hou
Summary: The study investigates Pd-modified Cu-ZnO-ZrO2 catalysts for CO2 hydrogenation to CH3OH. The interaction between Pd and CZZ is systematically characterized. The appropriate amount of Pd addition is crucial for modifying the surface Cu sites. The research provides molecular insights into the modification of intrinsic surface sites for CH3OH synthesis from CO2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Andrey E. Vertepov, Anna A. Fedorova, Alexander M. Batkin, Alexander V. Knotko, Konstantin I. Maslakov, Vladimir D. Doljenko, Alexander V. Vasiliev, Gennadiy I. Kapustin, Tatyana B. Shatalova, Nadezhda M. Sorokina, Leonid M. Kustov, Igor V. Morozov, Alexander L. Kustov
Summary: In this study, copper (II)-zinc oxide catalysts were successfully synthesized using fi-cyclodextrin as a template. The addition of cerium at the gelation stage was found to enhance the performance of the catalyst in the conversion of carbon dioxide to methanol, achieving high selectivity and productivity.
Article
Chemistry, Physical
Najrul Hussain, Mohammad Ali Abdelkareem, Hussain Alawadhi, Shamima Begum, Khaled Elsaid, A. G. Olabi
Summary: The synthesis and characterizations of the tricomponent CuO-ZnO-MoS2 composite material is reported for the first time in this work. The composite possessed outstanding catalytic performance in CO2 reduction to alcohol with maximum faradaic efficiency of 24.6% for methanol and 11.1% for ethanol.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Siraj Sultan, Hojeong Lee, Sojung Park, Minho M. Kim, Aram Yoon, Hansaem Choi, Tae-Hoon Kong, Young-Jin Koe, Hyung-Suk Oh, Zonghoon Lee, Hyungjun Kim, Wooyul Kim, Youngkook Kwon
Summary: In this study, a newly designed electrocatalyst with phase and interphase engineering achieves high selectivity for the electrochemical reduction of carbon dioxide to ethylene. The catalyst shows good catalytic stability and material durability.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Environmental
Yanxia Wang, Xiude Hu, Tuo Guo, Wengang Tian, Jian Hao, Qingjie Guo
Summary: The study investigated the effects of H2O and O2 on the CO2 adsorption performance of CNT-PEI, finding that H2O had the highest adsorption energy and diffusion coefficient, leading to increased CO2 capacity. O2 had a minor impact on CO2 capacity for fresh adsorbent, but its oxidation effect on amino groups was significant, prolonging desorption time.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Junhui Lu, Jinjing Tang, Junming Li, Suilin Wang
Summary: This experiment investigated the breakthrough curves and adsorption amounts of N-2/H2O and CO2/H2O on four different adsorbents. The results showed that flow rate, temperature, and inlet steam mole fraction had significant effects on the adsorption process. Zeolite 3A exhibited good selectivity for CO2/H2O and N-2/H2O.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Environmental
Pengbo Hu, Qiyu Weng, Duanle Li, Tao Lv, Shujuan Wang, Yuqun Zhuo
Summary: This study theoretically investigated the effects of flue gas constituents on As2O3 adsorption on γ-Al2O3 surface using DFT, finding that O2 converts most physisorption structures to chemisorption structures and the differences in stable adsorption structures of O2, H2O, SO2, and CO2 are the main factors affecting the positions and quantities of As2O3 physisorption structures. This research provides valuable information for enhancing the capture capacities of γ-Al2O3 in actual flue gas environments.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Gamze Topal Canbaz, Unsal Acikel, Yesim Sag Acikel
Summary: This study investigated the adsorption of Copper (II) from an aqueous solution using nanoparticles synthesized from organic waste. The extract from Allium cepa peel was used as a reducing agent to synthesize zinc oxide nanoparticles (ZnO NPs) through green synthesis. The synthesized ZnO NPs were obtained as composite adsorbents with halloysite (HNT), a type of clay. The adsorbents were characterized using various analytical techniques and the adsorption process was studied under different conditions. The results showed that Langmuir isotherm model best described the adsorption data, with an adsorption capacity of 500 mg g(-1). Kinetic and thermodynamic parameters were also calculated to understand the adsorption process.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Minghui Zhang, Yingying Liu, Yingming Zhu, Kejing Wu, Houfang Lu, Bin Liang
Summary: The presence of Cu(II) can enhance the absorption and desorption performance of CO2 in amine absorbents, reducing the impact of temperature increase during absorption and decreasing energy consumption. Electrochemical methods at relatively low temperatures can achieve efficient desorption and greatly reduce the energy consumption of amine absorbent regeneration.
Article
Chemistry, Applied
Gabriel Landeta Avellaneda, Renaud Denoyel, Isabelle Beurroies
Summary: This study investigates the application of modified and grafted materials in reducing CO2 emissions in the air. The results show that the CO2 adsorption capacity and affinity can be improved by modifying the silica structure and grafting amine groups. However, in high humidity conditions, water affects the adsorption efficiency of CO2.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Environmental Sciences
Chengshuang Wang, Sooyoun Yu, David M. Cwiertny, Yadong Yin, Nosang Myung
Summary: The PAN/Fe2O3/TBAB composite nanofibers synthesized by surfactant-mediated electrospinning as an adsorbent for phosphate removal showed efficient adsorption performance and excellent reusability. The phosphate removal was mainly achieved through the chemisorption of Fe2O3 nanoparticles, with TBAB sites contributing partially through anion exchange.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Hayder A. Alalwan, Logan J. Augustine, Blake G. Hudson, Janaka P. Abeysinghe, Edward G. Gillan, Sara E. Mason, Vicki H. Grassian, David M. Cwiertny
Summary: The reactivity of copper oxide (CuO) and cobalt (Co3O4) particles is independent of particle size, whereas iron (alpha-Fe2O3) shows increased reactivity with decreasing particle size. The solid-state reduction mechanism determines the size-dependence of different oxygen carriers.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Environmental Sciences
Muhammed Sit, Richard J. Langel, Darrin Thompson, David M. Cwiertny, Ibrahim Demir
Summary: Groundwater is essential for drinking water supply for over one-third of Americans, but finding reliable new well sources is increasingly challenging. A novel web application has been developed to quickly forecast well depths and provide water quality information, offering a more efficient alternative to traditional methods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Monica E. McFadden, Eric Patterson, Keith P. Reber, Ian W. Gilbert, John D. Sivey, Gregory H. LeFevre, David M. Cwiertny
Summary: This study investigated the rate constants and transformation products of dichloroacetamide safeners in acid- and base-mediated hydrolysis, filling gaps in understanding their environmental fate. Safeners such as benoxacor underwent appreciable hydrolysis at circumneutral pH, with a significant transformation observed under high-pH conditions typical of water treatment processes. The research proposed structures for major hydrolysis products and identified three distinct mechanistic pathways depending on system pH and compound structure, highlighting important differences in reactivity between dichloroacetamides and their active chloroacetamide co-formulants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Derek Simonsen, Jacob Heffelfinger, David M. Cwiertny, Hans-Joachim Lehmler
Summary: The metabolism of the herbicide safener benoxacor in Rhesus monkey subcellular fractions was investigated in this study, with findings showing that the metabolism was primarily mediated by carboxylesterase and cytochrome P450 enzymes. Differences were observed in the metabolism between male and female monkeys, and enantioselective metabolism by glutathione-S-transferases and CYPs may have an impact on the toxicity of benoxacor.
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
(2022)
Article
Polymer Science
Madeline G. Jensen, Patrick T. O'Shaughnessy, Marlee Shaffer, Sooyoun Yu, Yun Young Choi, Megan Christiansen, Charles O. Stanier, Michael Hartley, Joey Huddle, Jed Johnson, Kyle Bibby, Nosang V. Myung, David M. Cwiertny
Summary: During the global spread of COVID-19, the high demand and limited availability of melt-blown filtration material led to a manufacturing backlog of N95 Filtering Facepiece Respirators (FFRs). An alternative filter material, consisting of electrospun polystyrene (PS) microfibers, showed favorable performance in terms of filtration efficiency and antibacterial activity, potentially making it a suitable option for use in N95 FFRs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Environmental
Monica E. McFadden, Keith P. Reber, John D. Sivey, David M. Cwiertny, Gregory H. LeFevre
Summary: Microbial biotransformation of benoxacor and dichlormid primarily occurs via cometabolism, leading to the formation of novel products including monochlorinated species, glutathione conjugates, and sulfur-containing species. Dechlorination followed by conjugation with glutathione is proposed as the main transformation pathway.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Environmental Sciences
Derek Simonsen, Jacob Heffelfinger, David M. Cwiertny, Hans-Joachim Lehmler
Summary: This study investigates the enantioselective metabolism of benoxacor in human subcellular fractions. The results demonstrate that microsomal cytochrome P450 enzymes, microsomal carboxylesterases, and cytosolic glutathione S-transferases metabolize benoxacor. These findings highlight the importance of considering the enantioselective metabolism of benoxacor when studying human exposures and toxicities.
EMERGING CONTAMINANTS
(2023)
Article
Education & Educational Research
Ramteja Sajja, Yusuf Sermet, David Cwiertny, Ibrahim Demir
Summary: Miscommunication between instructors and students is a significant obstacle to post-secondary learning. To address this issue, an AI-augmented intelligent educational assistance framework was developed, utilizing GPT-3 to generate course-specific intelligent assistants. The virtual teaching assistant system can provide students with easy access to relevant information, improving engagement and reducing barriers to learning.
INTERNATIONAL JOURNAL OF EDUCATIONAL TECHNOLOGY IN HIGHER EDUCATION
(2023)
Article
Engineering, Environmental
Matthew Nagorzanski, Jiajie Qian, Andres Martinez, David M. Cwiertny
Summary: In this study, various electrospun nanofiber mats (ENMs) were fabricated and tested for their ability to sorb neonicotinoid insecticides. The inclusion of carbon nanotubes and cationic surfactants increased the sorption capacity, and carbonization temperature further enhanced the uptake. The optimal ENM exhibited fast uptake and comparable capacity to other carbonaceous sorbents.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2023)
Article
Environmental Sciences
James Kacer, Ralph Altmaier, Drew Latta, Patrick T. O'Shaughnessy, David M. Cwiertny
Summary: This study compared the mass of selected metals in the PM10 size fraction of fugitive dust from roads where slag was applied to metals in fugitive dust where slag was not applied. Manganese was found to be an important metal in the PM10 fraction on slag-covered roads, but the increase was not significant. Other HAPs were also detected in both slag-covered and non-slag-covered roads.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
Article
Engineering, Environmental
Michael J. Nalbandian, Sewoon Kim, Humberto E. Gonzalez-Ribot, Nosang Myung, David M. Cwiertny
Summary: In this review, the focus is on electrospun nanofibers as a promising material alternative for decentralized water treatment systems. The review analyzes the strengths and research opportunities of prior work and identifies emerging applications for nanofiber-based devices in decentralized water treatment. Research demonstrates promising material performance towards relevant targets for point-of-use/point-of-entry applications.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2022)
Article
Engineering, Environmental
Nabil Shaikh, Jiajie Qian, Sewoon Kim, Hoa Phan, Juan S. Lezama-Pacheco, Abdul-Mehdi S. Ali, David M. Cwiertny, Tori Z. Forbes, Amanda J. Haes, Jose M. Cerrato
Summary: Phosphonate functionalized electrospun nanofibers have been found to effectively uptake U(VI), especially when functionalized with longer-chain phosphonate surfactants. The interaction between U(VI) and environmentally relevant ions was investigated, and it was observed that the presence of bicarbonate ions may increase the solubility of uranium. The study also revealed that U is bound to phosphonate groups as a monodentate inner sphere surface complex. This study provides valuable insights for the development of technologies for the detection and treatment of U in water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Danielle T. Webb, Matthew R. Nagorzanski, David M. Cwiertny, Gregory H. LeFevre
Summary: This study investigates the sorption propensity of neonicotinoid insecticides and their transformation products and proposes a combined computational and experimental method to predict their environmental fate. The findings demonstrate that quantitative structure-activity relationship models can accurately predict the sorption of neonicotinoids and their transformation products to carbon-based materials.
Article
Engineering, Environmental
Chenxu Yan, Sruthi Kakuturu, Ashley Hesterberg Butzlaff, David M. Cwiertny, Syed Mubeen, Charles J. Werth
Summary: The PPTL flow reactor with potential control and custom-made cathode showed efficient nitrite removal with high current efficiency, but encountered issues such as ammonium production and significant current loss at more negative potentials. A reactive transport model was developed to simulate the kinetic data, indicating the reactor being more reaction limited than mass transfer limited. This parametrized model can be used to scale, operate, or modify the PPTL reactor for more efficient nitrite removal from larger flow streams.
ACS ES&T ENGINEERING
(2021)