ACS Physical Chemistry AuPub Date : 2025-02-11eCollection Date: 2025-03-26DOI: 10.1021/acsphyschemau.4c00106
Mohamed A Morsy, Thomas F Garrison, Michael R Kessler, Mohammad H A Mhareb, Hosny Zahr El-Deen
{"title":"Structural Elucidation of Lithium Borate Glasses Using XRD, FTIR, and EPR Spectroscopy.","authors":"Mohamed A Morsy, Thomas F Garrison, Michael R Kessler, Mohammad H A Mhareb, Hosny Zahr El-Deen","doi":"10.1021/acsphyschemau.4c00106","DOIUrl":"10.1021/acsphyschemau.4c00106","url":null,"abstract":"<p><p>A detailed investigation of the structural changes of lithium borate (LiB) glass 25Li<sub>2</sub>O-(75 - <i>x</i>)B<sub>2</sub>O<sub>3</sub> was conducted in the absence and presence of lead(II) oxide or aluminum oxide (<i>x</i> = 10 mol %) glass modifiers. X-ray diffraction (XRD), Fourier transform infrared (FTIR), and electron paramagnetic resonance (EPR) spectroscopy were used to explore the structural properties of LiB glass by incorporating trace amounts of manganese(III) oxide (0.00-0.25 mol %) as a probe. Differential thermal analysis and XRD results for the glasses and their ceramics confirmed the integration of aluminum atoms into the glass framework by forming a lithium aluminum boron oxide Li<sub>2</sub>(AlB<sub>5</sub>O<sub>10</sub>) crystalline phase. Lead atoms were located interstitially, which disordered the borate glass structure and produced a lithium tetraborate crystalline phase. Semiempirical modeling of the glass structures was conducted to estimate the fundamental vibrational modes of the glass materials using a parametric method 3 (PM3MM) with molecular mechanics corrections to elucidate the geometry of the borate (BO<sub>3</sub>) groups and their possible vibrational modes. Our analysis revised the conventional representation of the tetrahedral BO<sub>4</sub> units, which were not observed, to \"distorted-trigonal\" BO<sub>3</sub> groups and associated with nonbridging oxygen (NBO) atoms. EPR spectroscopy established a link between the NBO in oxides and the well-defined peak at <i>g</i>-factor ∼4.2 in glass materials, which had been assigned to iron(III) ions according to the literature.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"227-238"},"PeriodicalIF":3.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950853/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-11eCollection Date: 2025-03-26DOI: 10.1021/acsphyschemau.4c00111
Linn Katinka Emhjellen, Vincent Thoréton, Wen Xing, Reidar Haugsrud
{"title":"Superior Oxygen Exchange Kinetics on Bi<sub>2</sub>O<sub>3</sub>-Based Mixed Conducting Composites.","authors":"Linn Katinka Emhjellen, Vincent Thoréton, Wen Xing, Reidar Haugsrud","doi":"10.1021/acsphyschemau.4c00111","DOIUrl":"10.1021/acsphyschemau.4c00111","url":null,"abstract":"<p><p>The kinetics of oxygen exchange dictate the rate of redox reactions, which is crucial for electrochemical-based sustainable technologies. In this study, we use isotope exchange pulse responses to elucidate the oxygen exchange mechanism for (Bi<sub>0.8</sub>Tm<sub>0.2</sub>)<sub>2</sub>O<sub>3-δ</sub> (BTM)-(La<sub>0.8</sub>Sr<sub>0.2</sub>)<sub>0.99</sub>MnO<sub>3-δ</sub> (LSM) composites. With an optimized composition and microstructure, these composites can achieve polarization resistances below 0.01 Ω·cm<sup>2</sup> at 700 °C. Analysis of the oxygen exchange rate, , by splitting it into elementary processes using the serial two-step scheme, demonstrates that both the dissociative adsorption and incorporation of oxygen are accelerated in BTM-LSM compared to the parent phases. Dissociative adsorption of molecular oxygen is rate-limiting below 900 °C in the range 0.002-0.05 atm O<sub>2</sub> and below 850 °C in 0.21 atm O<sub>2</sub>. Cation interdiffusion or changes in the electronic structure at the interface between the two materials create an electrocatalytically active region spanning 1-40 nm around the BTM-LSM phase boundary. Oxygen exchange coefficients within this region were estimated to be 2-3 orders of magnitude higher compared to those of the entire composite surface. We propose two potential pathways for oxygen exchange in BTM-LSM, with calculated <i>p</i> <sub>O<sub>2</sub></sub> dependencies for each rate-determining step (<i>rds</i>). The <i>p</i> <sub>O<sub>2</sub></sub> dependency of reveals that molecular oxygen is involved in the <i>rds</i>.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"239-248"},"PeriodicalIF":3.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950862/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-11DOI: 10.1021/acsphyschemau.4c0010610.1021/acsphyschemau.4c00106
Mohamed A. Morsy*, Thomas F. Garrison, Michael R. Kessler, Mohammad H. A. Mhareb and Hosny Zahr El-Deen,
{"title":"Structural Elucidation of Lithium Borate Glasses Using XRD, FTIR, and EPR Spectroscopy","authors":"Mohamed A. Morsy*, Thomas F. Garrison, Michael R. Kessler, Mohammad H. A. Mhareb and Hosny Zahr El-Deen, ","doi":"10.1021/acsphyschemau.4c0010610.1021/acsphyschemau.4c00106","DOIUrl":"https://doi.org/10.1021/acsphyschemau.4c00106https://doi.org/10.1021/acsphyschemau.4c00106","url":null,"abstract":"<p >A detailed investigation of the structural changes of lithium borate (LiB) glass 25Li<sub>2</sub>O-(75 – <i>x</i>)B<sub>2</sub>O<sub>3</sub> was conducted in the absence and presence of lead(II) oxide or aluminum oxide (<i>x</i> = 10 mol %) glass modifiers. X-ray diffraction (XRD), Fourier transform infrared (FTIR), and electron paramagnetic resonance (EPR) spectroscopy were used to explore the structural properties of LiB glass by incorporating trace amounts of manganese(III) oxide (0.00–0.25 mol %) as a probe. Differential thermal analysis and XRD results for the glasses and their ceramics confirmed the integration of aluminum atoms into the glass framework by forming a lithium aluminum boron oxide Li<sub>2</sub>(AlB<sub>5</sub>O<sub>10</sub>) crystalline phase. Lead atoms were located interstitially, which disordered the borate glass structure and produced a lithium tetraborate crystalline phase. Semiempirical modeling of the glass structures was conducted to estimate the fundamental vibrational modes of the glass materials using a parametric method 3 (PM3MM) with molecular mechanics corrections to elucidate the geometry of the borate (BO<sub>3</sub>) groups and their possible vibrational modes. Our analysis revised the conventional representation of the tetrahedral BO<sub>4</sub> units, which were not observed, to “distorted-trigonal” BO<sub>3</sub> groups and associated with nonbridging oxygen (NBO) atoms. EPR spectroscopy established a link between the NBO in oxides and the well-defined peak at <i>g</i>-factor ∼4.2 in glass materials, which had been assigned to iron(III) ions according to the literature.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"227–238 227–238"},"PeriodicalIF":3.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphyschemau.4c00106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-11DOI: 10.1021/acsphyschemau.4c0011110.1021/acsphyschemau.4c00111
Linn Katinka Emhjellen, Vincent Thoréton, Wen Xing and Reidar Haugsrud*,
{"title":"Superior Oxygen Exchange Kinetics on Bi2O3-Based Mixed Conducting Composites","authors":"Linn Katinka Emhjellen, Vincent Thoréton, Wen Xing and Reidar Haugsrud*, ","doi":"10.1021/acsphyschemau.4c0011110.1021/acsphyschemau.4c00111","DOIUrl":"https://doi.org/10.1021/acsphyschemau.4c00111https://doi.org/10.1021/acsphyschemau.4c00111","url":null,"abstract":"<p >The kinetics of oxygen exchange dictate the rate of redox reactions, which is crucial for electrochemical-based sustainable technologies. In this study, we use isotope exchange pulse responses to elucidate the oxygen exchange mechanism for (Bi<sub>0.8</sub>Tm<sub>0.2</sub>)<sub>2</sub>O<sub>3−δ</sub> (BTM)–(La<sub>0.8</sub>Sr<sub>0.2</sub>)<sub>0.99</sub>MnO<sub>3−δ</sub> (LSM) composites. With an optimized composition and microstructure, these composites can achieve polarization resistances below 0.01 Ω·cm<sup>2</sup> at 700 °C. Analysis of the oxygen exchange rate, <span><img></span>, by splitting it into elementary processes using the serial two-step scheme, demonstrates that both the dissociative adsorption and incorporation of oxygen are accelerated in BTM–LSM compared to the parent phases. Dissociative adsorption of molecular oxygen is rate-limiting below 900 °C in the range 0.002–0.05 atm O<sub>2</sub> and below 850 °C in 0.21 atm O<sub>2</sub>. Cation interdiffusion or changes in the electronic structure at the interface between the two materials create an electrocatalytically active region spanning 1–40 nm around the BTM–LSM phase boundary. Oxygen exchange coefficients within this region were estimated to be 2–3 orders of magnitude higher compared to those of the entire composite surface. We propose two potential pathways for oxygen exchange in BTM–LSM, with calculated <i>p</i><sub>O<sub>2</sub></sub> dependencies for each rate-determining step (<i>rds</i>). The <i>p</i><sub>O<sub>2</sub></sub> dependency of <span><img></span> reveals that molecular oxygen is involved in the <i>rds</i>.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"239–248 239–248"},"PeriodicalIF":3.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphyschemau.4c00111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-06eCollection Date: 2025-03-26DOI: 10.1021/acsphyschemau.4c00093
Kamila Závacká, Ľubica Vetráková, Johannes Bachler, Vilém Neděla, Thomas Loerting
{"title":"In Spite of the Chemist's Belief: Metastable Hydrates of CsCl.","authors":"Kamila Závacká, Ľubica Vetráková, Johannes Bachler, Vilém Neděla, Thomas Loerting","doi":"10.1021/acsphyschemau.4c00093","DOIUrl":"10.1021/acsphyschemau.4c00093","url":null,"abstract":"<p><p>In this work, we focus on the low-temperature behavior of concentrated aqueous solutions of cesium chloride and discover two hydrates of CsCl. We employ four different methods, namely, (i) simple cooling at rates between 0.5 and 80 K s<sup>-1</sup>, (ii) simple cooling followed by pressurization, (iii) hyperquenching at 10<sup>6</sup> to 10<sup>7</sup> K s<sup>-1</sup>, and (iv) hyperquenching followed by pressurization. Depending on the method, different types of phase behaviors are observed, which encompass crystallization involving freeze-concentration, pressure-induced amorphization, full vitrification, and polyamorphic transformation. The CsCl hydrates discovered in our work cold-crystallize above 150 K upon heating after ultrafast vitrification (routes iii and iv) and show melting temperatures <i>below</i> the eutectic temperature of 251 K. We determine the composition of these hydrates to be CsCl·5H<sub>2</sub>O and CsCl·6H<sub>2</sub>O and find evidence for their existence in ESEM, calorimetry, and X-ray diffraction. The dominant and less metastable hydrate is the hexahydrate, where the pentahydrate appears as a minority species. We also reveal the birthplace for the CsCl hydrates, namely, the freeze-concentrated solution (FCS) formed upon cold-crystallization of the fully glassy solution (from iii and iv). The spongy FCS produced upon <i>cooling</i> of the liquid (from i and ii) is incapable of crystallizing CsCl-hydrates. By contrast, the FCS produced upon <i>heating</i> the glassy solution (from iii and iv) shows tiny, fine features that are capable of crystallizing CsCl-hydrates. Our findings contradict the current knowledge that alkali chlorides only have hydrates for the smaller cations Li<sup>+</sup> and Na<sup>+</sup>, but not for the larger cations K<sup>+</sup>, Rb<sup>+</sup>, and Cs<sup>+</sup> and pave the way for future determination of CsCl-hydrate crystal structures. The pathway to metastable crystalline materials outlined here might be more generally applicable and found in nature, e.g., in comets or on interstellar dust grains, when glassy aqueous solutions crystallize upon heating.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"195-206"},"PeriodicalIF":3.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950848/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-06DOI: 10.1021/acsphyschemau.4c0009310.1021/acsphyschemau.4c00093
Kamila Závacká, Ľubica Vetráková, Johannes Bachler, Vilém Neděla and Thomas Loerting*,
{"title":"In Spite of the Chemist’s Belief: Metastable Hydrates of CsCl","authors":"Kamila Závacká, Ľubica Vetráková, Johannes Bachler, Vilém Neděla and Thomas Loerting*, ","doi":"10.1021/acsphyschemau.4c0009310.1021/acsphyschemau.4c00093","DOIUrl":"https://doi.org/10.1021/acsphyschemau.4c00093https://doi.org/10.1021/acsphyschemau.4c00093","url":null,"abstract":"<p >In this work, we focus on the low-temperature behavior of concentrated aqueous solutions of cesium chloride and discover two hydrates of CsCl. We employ four different methods, namely, (i) simple cooling at rates between 0.5 and 80 K s<sup>–1</sup>, (ii) simple cooling followed by pressurization, (iii) hyperquenching at 10<sup>6</sup> to 10<sup>7</sup> K s<sup>–1</sup>, and (iv) hyperquenching followed by pressurization. Depending on the method, different types of phase behaviors are observed, which encompass crystallization involving freeze-concentration, pressure-induced amorphization, full vitrification, and polyamorphic transformation. The CsCl hydrates discovered in our work cold-crystallize above 150 K upon heating after ultrafast vitrification (routes iii and iv) and show melting temperatures <i>below</i> the eutectic temperature of 251 K. We determine the composition of these hydrates to be CsCl·5H<sub>2</sub>O and CsCl·6H<sub>2</sub>O and find evidence for their existence in ESEM, calorimetry, and X-ray diffraction. The dominant and less metastable hydrate is the hexahydrate, where the pentahydrate appears as a minority species. We also reveal the birthplace for the CsCl hydrates, namely, the freeze-concentrated solution (FCS) formed upon cold-crystallization of the fully glassy solution (from iii and iv). The spongy FCS produced upon <i>cooling</i> of the liquid (from i and ii) is incapable of crystallizing CsCl-hydrates. By contrast, the FCS produced upon <i>heating</i> the glassy solution (from iii and iv) shows tiny, fine features that are capable of crystallizing CsCl-hydrates. Our findings contradict the current knowledge that alkali chlorides only have hydrates for the smaller cations Li<sup>+</sup> and Na<sup>+</sup>, but not for the larger cations K<sup>+</sup>, Rb<sup>+</sup>, and Cs<sup>+</sup> and pave the way for future determination of CsCl-hydrate crystal structures. The pathway to metastable crystalline materials outlined here might be more generally applicable and found in nature, e.g., in comets or on interstellar dust grains, when glassy aqueous solutions crystallize upon heating.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"195–206 195–206"},"PeriodicalIF":3.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphyschemau.4c00093","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-04DOI: 10.1021/acsphyschemau.4c0009210.1021/acsphyschemau.4c00092
Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis and Daoru Han*,
{"title":"Per- and Polyfluoroalkyl Substance (PFAS) Degradation in Water and Soil Using Cold Atmospheric Plasma (CAP): A Review","authors":"Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis and Daoru Han*, ","doi":"10.1021/acsphyschemau.4c0009210.1021/acsphyschemau.4c00092","DOIUrl":"https://doi.org/10.1021/acsphyschemau.4c00092https://doi.org/10.1021/acsphyschemau.4c00092","url":null,"abstract":"<p >Per- and polyfluoroalkyl substances (PFASs) are persistent organic chemicals found in numerous industrial applications and everyday products. The excessive amounts of PFASs in water and soil, together with their link to severe health issues, have prompted substantial public concerns, making their removal from the environment a necessity. Existing degradation techniques are frequently lacking due to their low efficiency, cost-effectiveness, and potential for secondary contamination. Cold Atmospheric Plasma (CAP) technology has emerged as a promising alternative, utilizing energized reactive species to break down PFASs under ambient conditions. Therefore, this review examines the efficacy and effectiveness of CAP in degrading PFASs by reviewing various CAP setups and examining the key factors involved. This review also aims to further the development of CAP as a viable solution for PFAS degradation by addressing outstanding challenges and future directions in soil and water treatment.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"117–133 117–133"},"PeriodicalIF":3.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphyschemau.4c00092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-04eCollection Date: 2025-03-26DOI: 10.1021/acsphyschemau.4c00096
Dmitri Sokolovski, Dario De Fazio, Elena Akhmatskaya
{"title":"A Transition State Resonance Radically Reshapes Angular Distributions of the <i>F</i> + <i>H</i> <sub>2</sub> → <i>FH</i>(<i>v</i> <sub>f</sub> = 3) + <i>H</i> Reaction in the 62-102 meV Energy Range.","authors":"Dmitri Sokolovski, Dario De Fazio, Elena Akhmatskaya","doi":"10.1021/acsphyschemau.4c00096","DOIUrl":"10.1021/acsphyschemau.4c00096","url":null,"abstract":"<p><p>Reactive angular distributions of the benchmark <i>F</i> + <i>H</i> <sub>2</sub>(<i>v</i> <sub>i</sub> = 0) → <i>FH</i>(<i>v</i> <sub>f</sub> = 3) + <i>H</i> reaction show unusual propensity toward small scattering angles, a subject of a long debate in the literature. We use Regge trajectories to quantify the resonance contributions to state-to-state differential cross sections. Conversion to complex energy poles allows us to attribute the effect almost exclusively to a transition state resonance, long known to exist in the <i>F</i> + <i>H</i> <sub>2</sub> system and its isotopic variant <i>F</i> + <i>HD</i>. For our detailed analysis of angular scattering we employ the package DCS_Regge, recently developed for the purpose [Akhmatskaya E.; Sokolovski D.Comput. Phys. Commun.2022, 277, 108370].</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"219-226"},"PeriodicalIF":3.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950844/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-04eCollection Date: 2025-03-26DOI: 10.1021/acsphyschemau.4c00092
Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis, Daoru Han
{"title":"Per- and Polyfluoroalkyl Substance (PFAS) Degradation in Water and Soil Using Cold Atmospheric Plasma (CAP): A Review.","authors":"Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis, Daoru Han","doi":"10.1021/acsphyschemau.4c00092","DOIUrl":"10.1021/acsphyschemau.4c00092","url":null,"abstract":"<p><p>Per- and polyfluoroalkyl substances (PFASs) are persistent organic chemicals found in numerous industrial applications and everyday products. The excessive amounts of PFASs in water and soil, together with their link to severe health issues, have prompted substantial public concerns, making their removal from the environment a necessity. Existing degradation techniques are frequently lacking due to their low efficiency, cost-effectiveness, and potential for secondary contamination. Cold Atmospheric Plasma (CAP) technology has emerged as a promising alternative, utilizing energized reactive species to break down PFASs under ambient conditions. Therefore, this review examines the efficacy and effectiveness of CAP in degrading PFASs by reviewing various CAP setups and examining the key factors involved. This review also aims to further the development of CAP as a viable solution for PFAS degradation by addressing outstanding challenges and future directions in soil and water treatment.</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"117-133"},"PeriodicalIF":3.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950857/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143754579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Physical Chemistry AuPub Date : 2025-02-04DOI: 10.1021/acsphyschemau.4c0009610.1021/acsphyschemau.4c00096
Dmitri Sokolovski*, Dario De Fazio and Elena Akhmatskaya,
{"title":"A Transition State Resonance Radically Reshapes Angular Distributions of the F + H2 → FH(vf = 3) + H Reaction in the 62–102 meV Energy Range","authors":"Dmitri Sokolovski*, Dario De Fazio and Elena Akhmatskaya, ","doi":"10.1021/acsphyschemau.4c0009610.1021/acsphyschemau.4c00096","DOIUrl":"https://doi.org/10.1021/acsphyschemau.4c00096https://doi.org/10.1021/acsphyschemau.4c00096","url":null,"abstract":"<p >Reactive angular distributions of the benchmark <i>F</i> + <i>H</i><sub>2</sub>(<i>v</i><sub>i</sub> = 0) → <i>FH</i>(<i>v</i><sub>f</sub> = 3) + <i>H</i> reaction show unusual propensity toward small scattering angles, a subject of a long debate in the literature. We use Regge trajectories to quantify the resonance contributions to state-to-state differential cross sections. Conversion to complex energy poles allows us to attribute the effect almost exclusively to a transition state resonance, long known to exist in the <i>F</i> + <i>H</i><sub>2</sub> system and its isotopic variant <i>F</i> + <i>HD</i>. For our detailed analysis of angular scattering we employ the package <span>DCS_Regge</span>, recently developed for the purpose [<contrib-group><span>Akhmatskaya, E.</span>; <span>Sokolovski, D.</span></contrib-group> <cite><i>Comput. Phys. Commun.</i></cite> <span>2022</span>, <em>277</em>, <elocation-id>108370</elocation-id>].</p>","PeriodicalId":29796,"journal":{"name":"ACS Physical Chemistry Au","volume":"5 2","pages":"219–226 219–226"},"PeriodicalIF":3.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphyschemau.4c00096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}