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Vibrational Dynamics and Phase Transitions of Hydrazine to 50 GPa
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c0904710.1021/acsomega.4c09047
Roma Ripani*, Stephen A. Gramsch, Fatemeh Safari, Muhtar Ahart, Zhenxian Liu, Dana M. Dattelbaum and Russell J. Hemley, 
{"title":"Vibrational Dynamics and Phase Transitions of Hydrazine to 50 GPa","authors":"Roma Ripani*,&nbsp;Stephen A. Gramsch,&nbsp;Fatemeh Safari,&nbsp;Muhtar Ahart,&nbsp;Zhenxian Liu,&nbsp;Dana M. Dattelbaum and Russell J. Hemley,&nbsp;","doi":"10.1021/acsomega.4c0904710.1021/acsomega.4c09047","DOIUrl":"https://doi.org/10.1021/acsomega.4c09047https://doi.org/10.1021/acsomega.4c09047","url":null,"abstract":"<p >The high pressure behavior of hydrazine, N<sub>2</sub>H<sub>4</sub>, has been investigated to 50 GPa at room temperature using infrared and Raman spectroscopy to explore pressure induced phase transitions and changes in hydrogen bonding. Three solid–solid phase transitions were detected at 11, 21, and 32 GPa on room temperature compression through dramatic changes in the lattice vibration and N–H stretching regions with increasing pressure in both measurement techniques. The transition to phase IV, which appears at 32 GPa, exhibits increased hydrogen bonding with significant hysteresis, persisting to 9 GPa on decompression. This work presents a detailed analysis of the pressure dependence of mode shifts and calculations of mode Grüneisen parameters as well as a determination of an approximate thermodynamic Grüneisen parameter. We compare these results to the behavior of other small molecular materials such as ammonia and water and explore the evolution of hydrogen bonding in hydrazine toward the symmetrically hydrogen bonded state, which has previously been suggested by theoretical computations.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"7999–8008 7999–8008"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c09047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced Cartilage Regeneration: Chemical, Mechanical, and In Vitro Analysis of Innovative TiO2-Reinforced PVA Implants
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c0702910.1021/acsomega.4c07029
Santosh Kumar B Y, Arun M. Isloor*, G. C. Mohan Kumar*, Srirangam Prashanth and Anoop Penupolu, 
{"title":"Enhanced Cartilage Regeneration: Chemical, Mechanical, and In Vitro Analysis of Innovative TiO2-Reinforced PVA Implants","authors":"Santosh Kumar B Y,&nbsp;Arun M. Isloor*,&nbsp;G. C. Mohan Kumar*,&nbsp;Srirangam Prashanth and Anoop Penupolu,&nbsp;","doi":"10.1021/acsomega.4c0702910.1021/acsomega.4c07029","DOIUrl":"https://doi.org/10.1021/acsomega.4c07029https://doi.org/10.1021/acsomega.4c07029","url":null,"abstract":"<p >This study focuses on developing a synthetic, biocompatible graft for treating cartilage lesions. One-dimensional titanium dioxide nanotubes (TNTs) were incorporated into poly(vinyl alcohol) (PVA) hydrogel and processed using freeze-drying without chemical surfactants. Upon optimization of the composition, it was found that the incorporation of TNT altered the biomechanical properties without causing any adverse physiological effects. Annealing treatment further enhanced mechanical strength and energy dissipation, promoting elasticity. The hydrogel with 2 wt % TNT achieved maximum mechanical strength and the storage modulus values indicated elastic dominance, and biotribological tests showed cartilage-like frictional response via hydrodynamic lubrication. Against the microorganisms <i>Escherichia coli</i>, <i>Staphylococcus aureus</i>, and <i>Candida albicans</i>, grafts showed significant antimicrobial activity. In vitro experiments demonstrated that these nanocomposite hydrogels supported adhesion, proliferation, and upregulation of cartilage-specific gene expression in human mesenchymal stem cells hMSCs. This suggests potential for promoting hMSC chondrogenic differentiation and accelerating cartilage regeneration.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"7672–7682 7672–7682"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pore Size Evolutionary Mechanism of Anthracite Induced from Water–Rock Interactions
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c0628010.1021/acsomega.4c06280
Bo Wang, Bin Gao, Lilong Wang*, Shuo Wang, Caifang Wu, Wensheng Zhang and Guowei Liu, 
{"title":"Pore Size Evolutionary Mechanism of Anthracite Induced from Water–Rock Interactions","authors":"Bo Wang,&nbsp;Bin Gao,&nbsp;Lilong Wang*,&nbsp;Shuo Wang,&nbsp;Caifang Wu,&nbsp;Wensheng Zhang and Guowei Liu,&nbsp;","doi":"10.1021/acsomega.4c0628010.1021/acsomega.4c06280","DOIUrl":"https://doi.org/10.1021/acsomega.4c06280https://doi.org/10.1021/acsomega.4c06280","url":null,"abstract":"<p >The control effect of water–rock interactions on the pore structure strongly influences the extraction efficiency of coalbed methane. In this study, the #3 coal seam in the Fanzhuang block was taken as the research object, and a physical simulation cross experiment involving water–rock interactions was designed with different mineralization rates and different flow rates. The changes in the coal pore structure were compared to and analyzed under different experimental environments. The results show that the water–rock interaction sites are concentrated in the range of meso- and macropores. It can be shifted to micropores and small pores under the action of high mineralization and flow rates. The micropores and small pores gradually merge and transform into mesopores with the dissolution of soluble minerals in the process of water–rock interactions. Macropores undergo a weakening of cementation, causing the cementitious mineral particles to decompose and refill, thereby transforming into mesopores. Moreover, the dissolution of minerals leads to an increase in the ion concentration, pH value, and mineralization in the solution; moreover, the solution is weakly alkaline. In addition, the aqueous solution with a flow rate of 0.30 mL/min and high mineralization had a relatively strong effect on the pore structure. The results of this study can provide a theoretical reference for the optimization of coal-bed methane production systems.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"7635–7647 7635–7647"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c06280","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on a Concentration Detection Method for Turbid Media Based on Multipath Combination
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c0913010.1021/acsomega.4c09130
Zhe Zhao, Yuyan Yang, Xinming Dong, Huiquan Wang, Ruina Zhu, Guang Han and Jinhai Wang*, 
{"title":"Research on a Concentration Detection Method for Turbid Media Based on Multipath Combination","authors":"Zhe Zhao,&nbsp;Yuyan Yang,&nbsp;Xinming Dong,&nbsp;Huiquan Wang,&nbsp;Ruina Zhu,&nbsp;Guang Han and Jinhai Wang*,&nbsp;","doi":"10.1021/acsomega.4c0913010.1021/acsomega.4c09130","DOIUrl":"https://doi.org/10.1021/acsomega.4c09130https://doi.org/10.1021/acsomega.4c09130","url":null,"abstract":"<p >In order to improve the accuracy of concentration detection in turbid media, this study proposes a solution concentration detection method based on a variable-angle wedge-shaped sample cell. Each angle of the wedge-shaped sample cell corresponds to a specific optical path combination. By measuring at multiple wedge angles, we can expand a variety of optical path combinations, providing more information about the turbid media. In this study, transmission light intensity distribution characteristics of phantom solutions were collected at wedge angles ranging from 10 to 45°, with a 5° interval, and a multipath combination detection model was constructed. By analyzing the distribution characteristics of the transmission light intensity along the gradient direction, multipath combination information was fused, and a calibration model was constructed using partial least-squares regression. The results show that, compared to the detection method using a fixed-angle to construct multiple optical paths, the multipath combination method effectively improves the accuracy of concentration detection in turbid media, with a prediction set correlation coefficient (Rp) reaching 0.995. Therefore, this study proposes a new method to enhance the accuracy of turbid media detection by utilizing scattering characteristics through the construction of a multipath combination model by varying the wedge-shaped sample cell angles.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8052–8057 8052–8057"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c09130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effectiveness Evaluation on Network Fracturing in Ultra-Deep and Extremely Thick Reservoirs in Kuqa Piedmont─A Case Study of Well KS2-A
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c0967510.1021/acsomega.4c09675
Jianxin Peng, Zhanwei Yang, Ju Liu, Jueyong Feng, Dengfeng Ren, Ying Gao, Zhaoyang Zhang* and Rui Huang, 
{"title":"Effectiveness Evaluation on Network Fracturing in Ultra-Deep and Extremely Thick Reservoirs in Kuqa Piedmont─A Case Study of Well KS2-A","authors":"Jianxin Peng,&nbsp;Zhanwei Yang,&nbsp;Ju Liu,&nbsp;Jueyong Feng,&nbsp;Dengfeng Ren,&nbsp;Ying Gao,&nbsp;Zhaoyang Zhang* and Rui Huang,&nbsp;","doi":"10.1021/acsomega.4c0967510.1021/acsomega.4c09675","DOIUrl":"https://doi.org/10.1021/acsomega.4c09675https://doi.org/10.1021/acsomega.4c09675","url":null,"abstract":"<p >In the Keshen Gas Field in Kuqa Piedmont, the Cretaceous Bashijiqike formation is the main producing layer. The deepest exploratory wells exceed 8000 m, with reservoir pressures reaching 150 MPa, temperatures peaking at 190 °C, and formation thicknesses ranging from 100 to 300 m. The extreme operating conditions and well-controlled risks limit the testing methods after stimulation. Therefore, it is necessary to get a clear understanding of whether this kind of reservoir can be stimulated by network fracturing and how to determine whether it has been effectively fractured. By summarizing the commonly used network fracturing technologies for the ultra-deep reservoirs in Kuqa Piedmont and based on the geological and mechanical conditions affecting the formation of longitudinal and transverse fracture networks, the geological and engineering factors forming complex fracture network by coupling extension of artificial fractures and natural fractures are analyzed. Theoretical variations in operating curves during successful temporary plugging and diversion are investigated. The actual operating curve and theoretical curve are compared and analyzed after the temporary plugging diversion agent enters the artificial fractures. Combined with the microseismic monitoring and interpretation of wells after network fracturing, the analysis conclusions are mutually verified. Comprehensive research results suggest that, for ultra-deep and extremely thick reservoirs with well-developed natural fractures, theoretically, the transverse fracture network and multilayer stimulation can be achieved through fracturing. Currently, the technologies of temporary plugging diversion inside fractures and temporary plugging layering at the fracture opening are ineffective. Therefore, it is important to research ultra-deep temporary plugging layering and temporary plugging diversion technologies, which can provide strong technical support for exploration breakthroughs and efficient exploration for reservoirs deeper than 8000 m.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8182–8189 8182–8189"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c09675","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evolution of the Pore-Fracture System of Coal: A Case Study of Zhaozhuang Colliery, Qinshui Basin
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-21 DOI: 10.1021/acsomega.4c1061910.1021/acsomega.4c10619
Yanhai Liu, Guangui Zou*, Yuyan Che, Jiasheng She, Bin Li, Xiaodong Wang and Ke Ren, 
{"title":"Evolution of the Pore-Fracture System of Coal: A Case Study of Zhaozhuang Colliery, Qinshui Basin","authors":"Yanhai Liu,&nbsp;Guangui Zou*,&nbsp;Yuyan Che,&nbsp;Jiasheng She,&nbsp;Bin Li,&nbsp;Xiaodong Wang and Ke Ren,&nbsp;","doi":"10.1021/acsomega.4c1061910.1021/acsomega.4c10619","DOIUrl":"https://doi.org/10.1021/acsomega.4c10619https://doi.org/10.1021/acsomega.4c10619","url":null,"abstract":"<p >The structure and evolution of coal are intricately linked to its properties at both nanometer and micrometer scales. The refinement of pores and fractures is crucial for assessing outburst risks, evaluating coalbed methane (CBM) reservoirs, and improving the CBM recovery efficiency. This study involved collecting four different coal-body structure samples from the Zhaozhuang colliery in the southern Qinshui Basin. We conducted laboratory analyses to determine the physical properties of the coal and employed X-ray computed tomography (CT) to quantitatively assess the pore size distribution (PSD), volume contribution, morphology, and connectivity across various coal structures. The evolution and comparative characteristics of these coal structures under different tectonic stresses is discussed. Results reveal that the hysteresis loop type of 3# anthracite primarily aligns with the H3 type as per IUPAC classification, featuring predominantly plate-like and wedge-shaped pores at the nanometer scale. A shape factor was introduced to quantitatively categorize the pore types, highlighting its sensitivity to the coal structure. Spherical and tubular pores are mainly present in the aperture range of 0–25 μm, while larger apertures appeared as prolate spheroids and flat fractures. Primary coal contains more spherical or tubular pores, whereas tectonic coal shows a prevalence of slit pores and flat fractures, suggesting that pores and fractures undergo progressive deformation, either breaking or elongating, under tectonic stress. The elastic property is affected by the multifactor of the increased pore volume and changes in pore morphology. Permeability is influenced by PSD and connectivity, demonstrating a quadratic positive correlation with porosity, aperture, and specific surface area. Granular coal exhibited the most favorable permeability characteristics for CBM extraction. The distribution trend of morphology and comprehensive data highlight an evolutionary pattern of different coal structures. The evolution of the coal structure is mainly shaped by brittle and ductile deformation mechanisms. Cataclastic coal is characterized by an increase in new fractures, and granular coal undergoes rapid new fracture formation and enhanced connectivity under strong stress conditions. Mylonitic coal develops under ductile deformation mechanisms. These insights into the properties of various coal structures can significantly enhance our understanding of the CBM recovery efficiency from both microscopic and mesoscopic perspectives.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8448–8461 8448–8461"},"PeriodicalIF":3.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c10619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Engineering an Electrospun Composite Ureteral Stent Based on PLGA with Antibacterial Properties and Tailored Mechanical Strength
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-20 DOI: 10.1021/acsomega.4c1127810.1021/acsomega.4c11278
Halah Hadi Salih, Nabeel Kadim Abid AlSahib*, Hayder Ismael Jawad and Fatemeh Shokrolahi*, 
{"title":"Engineering an Electrospun Composite Ureteral Stent Based on PLGA with Antibacterial Properties and Tailored Mechanical Strength","authors":"Halah Hadi Salih,&nbsp;Nabeel Kadim Abid AlSahib*,&nbsp;Hayder Ismael Jawad and Fatemeh Shokrolahi*,&nbsp;","doi":"10.1021/acsomega.4c1127810.1021/acsomega.4c11278","DOIUrl":"https://doi.org/10.1021/acsomega.4c11278https://doi.org/10.1021/acsomega.4c11278","url":null,"abstract":"<p >This study aims to assess the feasibility of creating an antibacterial electrospun ureteral stent using biocompatible and biodegradable poly(<span>d</span>,<span>l</span>-lactide-<i>co</i>-glycolide) (PLGA). Two strategies were employed: the incorporation of layered double hydroxide (LDH) nanoparticles with a Zn/Al cation pair as reinforcing agents and the design of a three-layer electrospun structure with different fiber arrangements. LDH nanoparticles were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Mono/three-layer electrospun mats were prepared from pure PLGA and PLGA/LDH (3% LDH) with different fiber orientations to control the usual shrinkage of PLGA mats. A third composite with LDH and 0.5% chitosan was developed to enhance the antibacterial properties of the mats in synergy with Zn ions of LDH. SEM and tensile analyses were used to analyze the mat’s morphology and mechanical properties, and significant improvement in the three-layered mat’s mechanical properties with LDH and chitosan was demonstrated. Biodegradation and mechanical properties of the PLGA/chitosan/LDH sample were studied 2, 4, and 6 weeks after incubation in phosphate-buffered saline. Mechanical properties noticeably decreased after 4 weeks. The designed stent material exhibited excellent in vitro biocompatibility, significant antibacterial activity against <i>Staphylococcus aureus</i> and <i>Escherichia coli</i>, and suitable in vitro biodegradability. To summarize, the designed structure introduced a promising approach for developing advanced ureteral stents with improved mechanical and antibacterial characteristics.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8640–8651 8640–8651"},"PeriodicalIF":3.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c11278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficiency of H2 Production Influenced by CeO2 Content-Dependent Copper–Ceria Interaction
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-20 DOI: 10.1021/acsomega.4c0975110.1021/acsomega.4c09751
Wen-Qing Chen, Kai-Wen Wu, Jun-Hao Hu, Xuan Xu, Wen-Zhu Yu*, Ling-Ling Guo* and Shuai Wei*, 
{"title":"Efficiency of H2 Production Influenced by CeO2 Content-Dependent Copper–Ceria Interaction","authors":"Wen-Qing Chen,&nbsp;Kai-Wen Wu,&nbsp;Jun-Hao Hu,&nbsp;Xuan Xu,&nbsp;Wen-Zhu Yu*,&nbsp;Ling-Ling Guo* and Shuai Wei*,&nbsp;","doi":"10.1021/acsomega.4c0975110.1021/acsomega.4c09751","DOIUrl":"https://doi.org/10.1021/acsomega.4c09751https://doi.org/10.1021/acsomega.4c09751","url":null,"abstract":"<p >The interaction between active sites and the support plays a crucial aspect in the methanol steam reforming (MSR) reaction, which often influences the dispersion states and concentration of surface oxygen vacancies (O<sub>v</sub>). Here we report the fabrication of copper–ceria catalysts that contain different copper–ceria structures by adjusting the metal loading content. The Ce<sub>0.9</sub>Cu<sub>0.1</sub>O<sub><i>x</i></sub> catalyst shows a H<sub>2</sub> production rate as high as 53.2 mL<sub>H<sub>2</sub></sub>·g<sub>cat</sub><sup>–1</sup>·min<sup>–1</sup> at 250 °C, benefiting from the highly dispersed Cu species. When the Ce/Cu molar ratio is reduced further, the H<sub>2</sub> production rate continues to decrease due to the agglomeration of Cu. However, O<sub>v</sub> is another aspect of catalytic performance. The Ce<sub>0.1</sub>Cu<sub>0.9</sub>O<sub><i>x</i></sub> catalyst demonstrates an unexpected rise in the H<sub>2</sub> production rate for its abundant O<sub>v</sub>. Both the dispersion states of Cu species and the concentration of O<sub>v</sub> are significant. Among them, the optimal Ce/Cu ratio is 1/9 for CO-free MSR, which is potentially beneficial in a clean H<sub>2</sub> production area.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8213–8223 8213–8223"},"PeriodicalIF":3.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c09751","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sulfonated Cellulose: A Strategy for Effective Methylene Blue Sequestration
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-20 DOI: 10.1021/acsomega.5c0017910.1021/acsomega.5c00179
Mustafa Toy, Yaşar Kemal Recepoğlu and Özgür Arar*, 
{"title":"Sulfonated Cellulose: A Strategy for Effective Methylene Blue Sequestration","authors":"Mustafa Toy,&nbsp;Yaşar Kemal Recepoğlu and Özgür Arar*,&nbsp;","doi":"10.1021/acsomega.5c0017910.1021/acsomega.5c00179","DOIUrl":"https://doi.org/10.1021/acsomega.5c00179https://doi.org/10.1021/acsomega.5c00179","url":null,"abstract":"<p >This study investigates the sulfonation modification of cellulose for the removal of methylene blue (MB) from aqueous solutions. The prepared biosorbent was characterized, and its sorption capacity, kinetics, and thermodynamics were systematically evaluated. Fourier-transform infrared (FTIR) spectroscopy analyzed structural modifications, while scanning electron microscopy (SEM) examined the surface properties. The optimal sorbent dosage was determined as 0.05 g. MB removal efficiency increased from 11% at pH 1 to 70% at pH 2, reaching 99% within the pH range of 3 to 7. Kinetic studies revealed rapid sorption, achieving 99% removal within 3 min. Among various isotherm models, the Langmuir model provided the best fit (<i>R</i><sup>2</sup> = 0.9989), indicating monolayer sorption with a maximum capacity of 37.65 mg/g. Thermodynamic analysis showed negative Δ<i>G</i>° values, confirming a spontaneous sorption process, while an enthalpy change (Δ<i>H</i>°) of −33.5 kJ/mol indicated exothermic behavior. The entropy change (Δ<i>S</i>°) of −82.6 J mol<sup>–1</sup>·K<sup>–1</sup> suggested decreased disorder during sorption. Regeneration studies demonstrated that 0.2 M HCl combined with ethanol achieved the highest desorption efficiency, and after three cycles, the MB removal efficiency remained above 99%. The presence of −SO<sub>3</sub><sup>–</sup> groups played a crucial role in MB sorption via ion exchange and may also contribute through hydrogen bonding, thereby enhancing MB sorption. These findings highlight sulfonated cellulose as an efficient and regenerable biosorbent for MB removal, offering valuable insights into its sorption mechanisms.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8696–8708 8696–8708"},"PeriodicalIF":3.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.5c00179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retraction of “New Epoxy and Hardener System Based on an Imidazolium Ionic Liquid as an Anticorrosive Coating for Steel in the Marine Environment” 撤回 "基于咪唑离子液体的新型环氧树脂和固化剂系统作为海洋环境中钢铁的防腐涂层 "一文
IF 3.7 3区 化学
ACS Omega Pub Date : 2025-02-20 DOI: 10.1021/acsomega.5c0095810.1021/acsomega.5c00958
Ayman M. Atta*, Eid. M. Azzam, Khalaf M. Alenezi, Hani El Moll, Lassaad Mechi and Walaa El-sofany, 
{"title":"Retraction of “New Epoxy and Hardener System Based on an Imidazolium Ionic Liquid as an Anticorrosive Coating for Steel in the Marine Environment”","authors":"Ayman M. Atta*,&nbsp;Eid. M. Azzam,&nbsp;Khalaf M. Alenezi,&nbsp;Hani El Moll,&nbsp;Lassaad Mechi and Walaa El-sofany,&nbsp;","doi":"10.1021/acsomega.5c0095810.1021/acsomega.5c00958","DOIUrl":"https://doi.org/10.1021/acsomega.5c00958https://doi.org/10.1021/acsomega.5c00958","url":null,"abstract":"","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 8","pages":"8777 8777"},"PeriodicalIF":3.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.5c00958","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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