Pub Date : 2025-07-31DOI: 10.1007/s44442-025-00012-2
Xing Jianjun, Yao Chen, Yingna Xu, Guo‐Yu Yang, Lijun Shi
{"title":"Synthesis, characterization, and antiviral activity of 1,3,5-triazine derivatives as potential PIKfyve inhibitor","authors":"Xing Jianjun, Yao Chen, Yingna Xu, Guo‐Yu Yang, Lijun Shi","doi":"10.1007/s44442-025-00012-2","DOIUrl":"https://doi.org/10.1007/s44442-025-00012-2","url":null,"abstract":"","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"29 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44442-025-00012-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-18DOI: 10.1007/s44442-025-00001-5
Jilai Zhang, Dan Jian, Chenglei Hu, Wenhua Chen, Ming Jiang, Shaofeng Wang, Youbo Su, Naiming Zhang, Zhihao Si, M. Lu
Dissolved organic matter (DOM) strongly influences the geochemical mobility of metal ions, yet little is known about the mechanism of lead (Pb) binding to DOM in the presence of copper (Cu) and zinc (Zn). This research used different types of ultraviolet–visible (UV–vis) spectroscopy analysis technologies, including differential log-transformed spectra coupled with spectral slope calculation, and two-dimensional correlation spectroscopy (2D-COS) analysis to investigate the binding characteristics between Pb and DOM in the presence of Zn and Cu, respectively. The results indicate that the addition both of Zn 2+or Cu 2+can reduce the binding of DOM to Pb 2+, with the effect of Cu 2+being the most obvious. Specifically, significant changes were evident in the differential log-transformed absorbance at higher Zn2+/Cu2+ concentrations, including modified spectral shapes, absorption wavelength fluctuation, and differential absorption intensity changes. The differential log-transformed absorbance spectral slopes (∆S350-400) exhibited a positive correlation with the predicted NICA-Donnan model value in a wavelength range of 350–400 nm. This suggested that ∆S350-400 served as an indicator for assessing the complexation characteristics of Pb and DOM binding in the presence of Zn2+ and Cu2+, respectively. The 2D-COS spectral results showed that the presence of Zn2+/Cu2+ changed the binding order of the DOM functional groups in response to Pb2+. This study revealed that Zn2+ and Cu2+ competed with Pb2+ for complex sites on the DOM surface in different ways, altering the ability of Pb2+ to bind with DOM. The results suggest that using differential log-transformed spectroscopy combined with ∆S350-400 and 2D-COS analyses is a promising approach to understanding the mechanisms of Zn2+/Cu2+ effects on Pb-DOM interactions, which may provide new insights into the prevention, control, and remediation of environmental Pb pollution.
{"title":"Examination the effects of Zn2+ and Cu2+ on the Pb2+ binding with dissolved organic matter using absorbance spectroscopy","authors":"Jilai Zhang, Dan Jian, Chenglei Hu, Wenhua Chen, Ming Jiang, Shaofeng Wang, Youbo Su, Naiming Zhang, Zhihao Si, M. Lu","doi":"10.1007/s44442-025-00001-5","DOIUrl":"https://doi.org/10.1007/s44442-025-00001-5","url":null,"abstract":"Dissolved organic matter (DOM) strongly influences the geochemical mobility of metal ions, yet little is known about the mechanism of lead (Pb) binding to DOM in the presence of copper (Cu) and zinc (Zn). This research used different types of ultraviolet–visible (UV–vis) spectroscopy analysis technologies, including differential log-transformed spectra coupled with spectral slope calculation, and two-dimensional correlation spectroscopy (2D-COS) analysis to investigate the binding characteristics between Pb and DOM in the presence of Zn and Cu, respectively. The results indicate that the addition both of Zn 2+or Cu 2+can reduce the binding of DOM to Pb 2+, with the effect of Cu 2+being the most obvious. Specifically, significant changes were evident in the differential log-transformed absorbance at higher Zn2+/Cu2+ concentrations, including modified spectral shapes, absorption wavelength fluctuation, and differential absorption intensity changes. The differential log-transformed absorbance spectral slopes (∆S350-400) exhibited a positive correlation with the predicted NICA-Donnan model value in a wavelength range of 350–400 nm. This suggested that ∆S350-400 served as an indicator for assessing the complexation characteristics of Pb and DOM binding in the presence of Zn2+ and Cu2+, respectively. The 2D-COS spectral results showed that the presence of Zn2+/Cu2+ changed the binding order of the DOM functional groups in response to Pb2+. This study revealed that Zn2+ and Cu2+ competed with Pb2+ for complex sites on the DOM surface in different ways, altering the ability of Pb2+ to bind with DOM. The results suggest that using differential log-transformed spectroscopy combined with ∆S350-400 and 2D-COS analyses is a promising approach to understanding the mechanisms of Zn2+/Cu2+ effects on Pb-DOM interactions, which may provide new insights into the prevention, control, and remediation of environmental Pb pollution.","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"29 1-2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44442-025-00001-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-11DOI: 10.1007/s44442-025-00002-4
Nabiha Mohd Yussuf, Aznan Fazli Ismail, Muhammad Yasir
{"title":"Revolutionizing thorium capture: g-C3N4 electrodes for enhanced thorium electrosorption","authors":"Nabiha Mohd Yussuf, Aznan Fazli Ismail, Muhammad Yasir","doi":"10.1007/s44442-025-00002-4","DOIUrl":"https://doi.org/10.1007/s44442-025-00002-4","url":null,"abstract":"","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"29 1-2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s44442-025-00002-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-12-09DOI: 10.1016/j.jscs.2024.101956
Tehmeena Ishaq , Rabia Naeem , Ayesha Qayyum , Maryam Yousaf , Zainab Ehsan , Aamal A. Al-Mutairi , Ali Irfan , Sami A. Al-Hussain , Rab Nawaz , Magdi E.A. Zaki
In recent years, carbon dioxide removal has been a hot topic due to increased global warming, and photocatalytic reduction of CO2 can be the best stratagem to reduce its concentration. Among many catalysts, graphitic carbon nitride (g-C3N4) can be the best choice for CO2 removal due to its promising band gap and superior physicochemical stability. The current review explains the thermodynamics of CO2 removal and benchmarks the essential requirements for its improved kinetics. It further highlights recent developments in the g-C3N4-based catalysts, which include morphological adjustments, heterojunctions, defect engineering, doping, and composite fabrication. Moreover, the impact of metal oxides and sulfides on band structure and the catalytic behavior of g-C3N4 is demonstrated. In summary, this review article provides an in-depth analysis of the various endeavors made to improve the photocatalytic tenders of the g-C3N4 for enhancing its CO2 removal activity and can be a worthwhile addition to the literature for its great ideas to address environmental pollution in terms of CO2 reduction.
{"title":"Recent developments in carbon nitride for enhanced photocatalytic carbon dioxide reduction: A review","authors":"Tehmeena Ishaq , Rabia Naeem , Ayesha Qayyum , Maryam Yousaf , Zainab Ehsan , Aamal A. Al-Mutairi , Ali Irfan , Sami A. Al-Hussain , Rab Nawaz , Magdi E.A. Zaki","doi":"10.1016/j.jscs.2024.101956","DOIUrl":"10.1016/j.jscs.2024.101956","url":null,"abstract":"<div><div>In recent years, carbon dioxide removal has been a hot topic due to increased global warming, and photocatalytic reduction of CO<sub>2</sub> can be the best stratagem to reduce its concentration. Among many catalysts, graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) can be the best choice for CO<sub>2</sub> removal due to its promising band gap and superior physicochemical stability. The current review explains the thermodynamics of CO<sub>2</sub> removal and benchmarks the essential requirements for its improved kinetics. It further highlights recent developments in the g-C<sub>3</sub>N<sub>4</sub>-based catalysts, which include morphological adjustments, heterojunctions, defect engineering, doping, and composite fabrication. Moreover, the impact of metal oxides and sulfides on band structure and the catalytic behavior of g-C<sub>3</sub>N<sub>4</sub> is demonstrated. In summary, this review article provides an in-depth analysis of the various endeavors made to improve the photocatalytic tenders of the g-C<sub>3</sub>N<sub>4</sub> for enhancing its CO<sub>2</sub> removal activity and can be a worthwhile addition to the literature for its great ideas to address environmental pollution in terms of CO<sub>2</sub> reduction.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101956"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-10-05DOI: 10.1016/j.jscs.2024.101945
Mohammed Alyami , Samah El-Bashir
The current research proposed innovative photoselective greenhouse cooling films made from PMMA/ITO nanohybrids, incorporating varying concentrations of Indium tin oxide nanocrystals (ITO NCs) and the fluorescent organic dye Lumogen F Red300, utilizing the solvent casting method. The morphology and structure were examined using transmission electron microscopy (TEM) and X-ray diffraction (XRD), demonstrating good homogeneity and amorphous nature. The impact of different ITO NC concentrations on physical properties was examined through differential scanning calorimetry (DSC), optical absorption, transmission, reflection, fluorescence, and Fourier transform infrared (FT-IR) spectroscopy. Integrating ITO NCs into the PMMA matrix showed enhanced thermal insulation capabilities of PMMA films while maintaining their transparency to photosynthetically active radiation (PAR). Maintaining this balance is crucial because it enables the films to selectively filter and reflect infrared radiation leading to lower greenhouse temperatures while still allowing the essential light needed for plant growth to pass through. This research is particularly significant for Sustainable Development Goals (SDGs) 2 and 13, especially in hot, water-scarce regions, as it protects plants from thermal stress, promotes growth, and supports food security in developing countries.
目前的研究提出了创新的光电选择性温室冷却薄膜，该薄膜由 PMMA/ITO 纳米杂化物制成，其中含有不同浓度的氧化铟锡纳米晶体（ITO NCs）和荧光有机染料 Lumogen F Red300，并采用了溶剂浇铸法。利用透射电子显微镜（TEM）和 X 射线衍射（XRD）对其形态和结构进行了检测，结果表明其具有良好的均匀性和无定形性。通过差示扫描量热法（DSC）、光吸收、透射、反射、荧光和傅立叶变换红外（FT-IR）光谱，研究了不同浓度的 ITO NC 对物理性质的影响。将 ITO NCs 集成到 PMMA 基体中可增强 PMMA 薄膜的隔热能力，同时保持其对光合有效辐射 (PAR) 的透明度。保持这种平衡至关重要，因为它能使薄膜有选择性地过滤和反射红外线辐射，从而降低温室温度，同时仍允许植物生长所需的基本光通过。这项研究对于可持续发展目标（SDGs）2 和 13 尤为重要，尤其是在炎热缺水地区，因为它可以保护植物免受热应力影响，促进生长，并为发展中国家的粮食安全提供支持。
{"title":"Enhanced thermal stability photophysical properties of photoselective PMMA/ITO nanohybrid films for greenhouse cooling in hot climates","authors":"Mohammed Alyami , Samah El-Bashir","doi":"10.1016/j.jscs.2024.101945","DOIUrl":"10.1016/j.jscs.2024.101945","url":null,"abstract":"<div><div>The current research proposed innovative photoselective greenhouse cooling films made from PMMA/ITO nanohybrids, incorporating varying concentrations of Indium tin oxide nanocrystals (ITO NCs) and the fluorescent organic dye Lumogen F Red300, utilizing the solvent casting method. The morphology and structure were examined using transmission electron microscopy (TEM) and X-ray diffraction (XRD), demonstrating good homogeneity and amorphous nature. The impact of different ITO NC concentrations on physical properties was examined through differential scanning calorimetry (DSC), optical absorption, transmission, reflection, fluorescence, and Fourier transform infrared (FT-IR) spectroscopy. Integrating ITO NCs into the PMMA matrix showed enhanced thermal insulation capabilities of PMMA films while maintaining their transparency to photosynthetically active radiation (PAR). Maintaining this balance is crucial because it enables the films to selectively filter and reflect infrared radiation leading to lower greenhouse temperatures while still allowing the essential light needed for plant growth to pass through. This research is particularly significant for Sustainable Development Goals (SDGs) 2 and 13, especially in hot, water-scarce regions, as it protects plants from thermal stress, promotes growth, and supports food security in developing countries.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101945"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
SiO2-decorated nano-scale TiO2 composites have been fabricated via hydrothermal technique (high temperature and pressure) as a robust catalyst. The proposed catalyst was characterized to confirm its structure and composite using characteristics tests. 2,3-disubstituted quinazoline-4(3H)-one framework has been successfully prepared through two paths: reflux and probe ultrasound irradiation (US-probe, 40 W). The efficiency of the two various techniques was comparatively studied on the fundamental properties of the proposed catalyst. According to the obtained results, the US-probe method (due to the cavitation effect) provides favorable reaction conditions (saving energy and time). In this comparative study, SiO2-decorated nano-scale TiO2 composites were selected and used as a heterogeneous catalyst in a US-probe-assisted multicomponent reaction of isatoic anhydride, various aryl aldehydes, and amine components (aryl amines, aliphatic amines, and ammonium acetate). In the following, a variety of pharmaceutical 2,3-disubstituted quinazoline-4(3H)-one derivative were prepared under US-probe conditions and obtained excellent yield (90–97 %) within short reaction time (up to 10 min) due to substantial synergic effect between US-probe and SiO2-decorated nano-scale TiO2 composites. Besides, chemical/thermal stability, eco-friendliness, and recoverability of the catalyst (7 runs) are other outstanding advantages of this research. Using the drug design approach and computational chemistry, the antibacterial attributes of prepared products were finally perused and checked. All synthesized products have a molecular mass of less than 500 g/mol. Computational chemistry data revealed that prepared products bind well to the agonist at the active site of the P37432 protein (docking score between −5.044 and −3.625), which shows within the inactivation of this protein throughout ailment therapy. According to this, it was found that the prepared products will have the potential to become an antibacterial drug.
{"title":"Ultrasound probe-assisted fabrication of 2,3-disubstituted quinazoline-4(3H)-one framework in the existence of SiO2-decorated nano-scale TiO2 composite and investigating their antibacterial attributes via molecular docking simulations","authors":"Mohammad Reza Farhang, Manuchehr Fadaeian, Gholam Reza Najafi, Mahboubeh sadat Sharif","doi":"10.1016/j.jscs.2024.101942","DOIUrl":"10.1016/j.jscs.2024.101942","url":null,"abstract":"<div><div>SiO<sub>2</sub>-decorated nano-scale TiO<sub>2</sub> composites have been fabricated via hydrothermal technique (high temperature and pressure) as a robust catalyst. The proposed catalyst was characterized to confirm its structure and composite using characteristics tests. 2,3-disubstituted quinazoline-4(3H)-one framework has been successfully prepared through two paths: reflux and probe ultrasound irradiation (US-probe, 40 W). The efficiency of the two various techniques was comparatively studied on the fundamental properties of the proposed catalyst. According to the obtained results, the US-probe method (due to the cavitation effect) provides favorable reaction conditions (saving energy and time). In this comparative study, SiO<sub>2</sub>-decorated nano-scale TiO<sub>2</sub> composites were selected and used as a heterogeneous catalyst in a US-probe-assisted multicomponent reaction of isatoic anhydride, various aryl aldehydes, and amine components (aryl amines, aliphatic amines, and ammonium acetate). In the following, a variety of pharmaceutical 2,3-disubstituted quinazoline-4(3H)-one derivative were prepared under US-probe conditions and obtained excellent yield (90–97 %) within short reaction time (up to 10 min) due to substantial synergic effect between US-probe and SiO<sub>2</sub>-decorated nano-scale TiO<sub>2</sub> composites. Besides, chemical/thermal stability, eco-friendliness, and recoverability of the catalyst (7 runs) are other outstanding advantages of this research. Using the drug design approach and computational chemistry, the antibacterial attributes of prepared products were finally perused and checked. All synthesized products have a molecular mass of less than 500 g/mol. Computational chemistry data revealed that prepared products bind well to the agonist at the active site of the P37432 protein (docking score between −5.044 and −3.625), which shows within the inactivation of this protein throughout ailment therapy. According to this, it was found that the prepared products will have the potential to become an antibacterial drug.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101942"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-11-24DOI: 10.1016/j.jscs.2024.101954
Iman Abdullah, Patrik Chandra, Yuni Krisyuningsih Krisnandi
Transforming CO2 into more valuable chemicals has gained great interest due to greenhouse gas and climate change related issues. In this study, we performed CO2 hydrogenation using a bimetallic nickel-silver catalyst supported on periodic mesoporous organosilica (NiAg/NH2-pr-Ph-PMO). The NH2pr-Ph-PMO was prepared via a co-condensation method, and NiAg was was incorporated using a simple wet impregnation process. Physicochemical properties of the catalyst were thoroughly characterized using FTIR, XRD, SEM-EDX, TEM, and BET-BJH. The synthesized NiAg/NH2pr-Ph-PMO exhibited excellent properties, including a large surface area (793.5 m2/g) and uniform metal distribution. The optimal conditions for CO2 hydrogenation found in this study were 225 °C, 2 bar, and a CO2/H2 ratio of 1:5. Under these conditions, conversion of CO2 reached 38.34 % with 86.89 % selectivity towards formaldehyde production. Furthermore, NiAg/NH2pr-Ph-PMO exhibits fine catalytic stability with the CO2 conversion maintained above 35 % after 4 reaction cycles. FTIR analysis indicates no significant structural damage on the used catalyst, highlighting its robustness. This study showcases the excellent performance of the novel catalyst in converting CO2 into more valuable chemicals.
{"title":"Bimetallic NiAg supported on aminopropyl-functionalized periodic mesoporous organosilica as a reusable catalyst for CO2 conversion to value-added chemicals","authors":"Iman Abdullah, Patrik Chandra, Yuni Krisyuningsih Krisnandi","doi":"10.1016/j.jscs.2024.101954","DOIUrl":"10.1016/j.jscs.2024.101954","url":null,"abstract":"<div><div>Transforming CO<sub>2</sub> into more valuable chemicals has gained great interest due to greenhouse gas and climate change related issues. In this study, we performed CO<sub>2</sub> hydrogenation using a bimetallic nickel-silver catalyst supported on periodic mesoporous organosilica (NiAg/NH<sub>2</sub>-pr-Ph-PMO). The NH<sub>2</sub>pr-Ph-PMO was prepared via a co-condensation method, and NiAg was was incorporated using a simple wet impregnation process. Physicochemical properties of the catalyst were thoroughly characterized using FTIR, XRD, SEM-EDX, TEM, and BET-BJH. The synthesized NiAg/NH<sub>2</sub>pr-Ph-PMO exhibited excellent properties, including a large surface area (793.5 m<sup>2</sup>/g) and uniform metal distribution. The optimal conditions for CO<sub>2</sub> hydrogenation found in this study were 225 °C, 2 bar, and a CO<sub>2</sub>/H<sub>2</sub> ratio of 1:5. Under these conditions, conversion of CO<sub>2</sub> reached 38.34 % with 86.89 % selectivity towards formaldehyde production. Furthermore, NiAg/NH<sub>2</sub>pr-Ph-PMO exhibits fine catalytic stability with the CO<sub>2</sub> conversion maintained above 35 % after 4 reaction cycles. FTIR analysis indicates no significant structural damage on the used catalyst, highlighting its robustness. This study showcases the excellent performance of the novel catalyst in converting CO<sub>2</sub> into more valuable chemicals.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101954"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-09-06DOI: 10.1016/j.jscs.2024.101929
Hamid Karami , Saeed Soltanali , Mozhdeh Amanati , Weiyu Song , Jian Liu , Khashayar Sharifi
The Cr/Al2O3 catalyst, a prevalent system in commercial applications, plays a significant role in propane dehydrogenation (PDH). Notable improvements in this catalyst’s efficiency are essential for its continued use. In order to examine the effect of alkaline earth metals on the catalyst performances in the propane dehydrogenation reaction, a series of Cr/η-Al2O3 were synthesized by the impregnation method. The synthesized catalysts were designated as Cr-T/η-Al2O3, where T represents Ca, Mg, Sr, and Ba. The supports and the catalysts were studied using the following techniques: XRD, N2 adsorption–desorption, temperature-programmed desorption and reduction, UV–Vis and Raman spectroscopy, and XPS analyses. The findings reveal that the Cr-Ba/η-Al2O3 catalyst exhibits better catalytic performance, with significantly higher propane conversion and propylene selectivity (with initial values of 66 % and 86.2 %, respectively) compared to other catalysts. The enhanced performance is attributed to the increased dispersion of Cr species, stabilization of Cr6+ species, and reducing the total amount of acid sites and strong acid sites, which are crucial for maintaining active sites and minimizing coke deposition. The Ba-modified catalyst also demonstrated excellent stability, with a lower deactivation rate (Ba(0.201 h−1) < Sr(0.213 h−1) < Ca(0.270 h−1) < Mg(0.310 h−1) < parent(0.338 h−1)) and robust regenerative capacity over multiple cycles.
{"title":"The promotion effects of alkaline earth metals on the properties of Cr/η-Al2O3 catalysts for propane dehydrogenation","authors":"Hamid Karami , Saeed Soltanali , Mozhdeh Amanati , Weiyu Song , Jian Liu , Khashayar Sharifi","doi":"10.1016/j.jscs.2024.101929","DOIUrl":"10.1016/j.jscs.2024.101929","url":null,"abstract":"<div><p>The Cr/Al<sub>2</sub>O<sub>3</sub> catalyst, a prevalent system in commercial applications, plays a significant role in propane dehydrogenation (PDH). Notable improvements in this catalyst’s efficiency are essential for its continued use. In order to examine the effect of alkaline earth metals on the catalyst performances in the propane dehydrogenation reaction, a series of Cr/η-Al<sub>2</sub>O<sub>3</sub> were synthesized by the impregnation method. The synthesized catalysts were designated as Cr-T/η-Al<sub>2</sub>O<sub>3</sub>, where T represents Ca, Mg, Sr, and Ba. The supports and the catalysts were studied using the following techniques: XRD, N<sub>2</sub> adsorption–desorption, temperature-programmed desorption and reduction, UV–Vis and Raman spectroscopy, and XPS analyses. The findings reveal that the Cr-Ba/η-Al<sub>2</sub>O<sub>3</sub> catalyst exhibits better catalytic performance, with significantly higher propane conversion and propylene selectivity (with initial values of 66 % and 86.2 %, respectively) compared to other catalysts. The enhanced performance is attributed to the increased dispersion of Cr species, stabilization of Cr<sup>6+</sup> species, and reducing the total amount of acid sites and strong acid sites, which are crucial for maintaining active sites and minimizing coke deposition. The Ba-modified catalyst also demonstrated excellent stability, with a lower deactivation rate (Ba(0.201 h<sup>−1</sup>) < Sr(0.213 h<sup>−1</sup>) < Ca(0.270 h<sup>−1</sup>) < Mg(0.310 h<sup>−1</sup>) < parent(0.338 h<sup>−1</sup>)) and robust regenerative capacity over multiple cycles.</p></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101929"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319610324001248/pdfft?md5=b9e04321a7b244f955cc3a5fe82425e8&pid=1-s2.0-S1319610324001248-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-10-12DOI: 10.1016/j.jscs.2024.101950
Yu Lin Hu, Yan Hui Lei, Yu Tao Zhang
Carbon dioxide as a C1 building block to synthesize α-alkylidene cyclic carbonates is an environmental and sustainable approach. In this work, we designed and synthesized a type of multifunctional magnetic MOF nanocomposite catalysts, which could realize the carboxylic cyclization of CO2 and propargylic alcohols into α-alkylidene cyclic carbonates under solvent-free conditions. Among all the prepared nanocomposites, the MnFe2O4@SiO2@Cu-MOF nanocomposite is the best in catalytic activity combined with the tetrabutylphosphonium acetate ([Bu4P]OAc) ionic liquid cocatalyst. The catalytic system MnFe2O4@SiO2@Cu-MOF/[Bu4P]OAc displayed excellent performance in catalyzing the carboxylic cyclization of CO2 and different propargylic alcohols, and a series of α-alkylidene cyclic carbonates were obtained in high to excellent yields (88 ∼ 98 %) under mild reaction conditions (0.2 MPa, 35 °C). In addition, the two-component catalytic system had high stability and reusability, and can be easily separated and reused up to six consecutive cycles without considerable decrease in catalytic activity. Moreover, using the ionic liquid [Bu4P]OAc as the cocatalyst, the nanocomposite had good substrate adaptability for the catalytic carboxylic cyclization, which opens interesting prospects for the development of new magnetic MOF nanocomposites as efficient heterogeneous catalysts for the chemical transformation of CO2 into value-added chemicals.
以二氧化碳为C1构筑基块合成α-亚烷基环碳酸盐是一种环保且可持续的方法。本研究设计并合成了一种多功能磁性 MOF 纳米复合催化剂，可在无溶剂条件下实现二氧化碳与丙炔醇的羧基环化反应生成α-亚烷基环碳酸盐。在所有制备的纳米复合材料中，MnFe2O4@SiO2@Cu-MOF 纳米复合材料与四丁基醋酸鏻（[Bu4P]OAc）离子液体催化剂结合的催化活性最好。MnFe2O4@SiO2@Cu-MOF/[Bu4P]OAc 催化体系在催化 CO2 和不同丙炔醇的羧基环化反应中表现出优异的性能，在温和的反应条件（0.2 兆帕，35 °C）下，以高至优异的收率（88 ∼ 98 %）获得了一系列α-亚烷基环碳酸盐。此外，该双组分催化体系具有很高的稳定性和重复使用性，可轻松分离并重复使用长达六个连续循环，而不会显著降低催化活性。此外，以离子液体[Bu4P]OAc 为助催化剂，该纳米复合材料对催化羧基环化具有良好的底物适应性，这为开发新型磁性 MOF 纳米复合材料作为将 CO2 化学转化为高附加值化学品的高效异相催化剂开辟了有趣的前景。
{"title":"Novel and reusable magnetic MOF nanocomposite coupled ionic liquid-promoted efficient chemical fixation of CO2 into α-alkylidene cyclic carbonates","authors":"Yu Lin Hu, Yan Hui Lei, Yu Tao Zhang","doi":"10.1016/j.jscs.2024.101950","DOIUrl":"10.1016/j.jscs.2024.101950","url":null,"abstract":"<div><div>Carbon dioxide as a C1 building block to synthesize α-alkylidene cyclic carbonates is an environmental and sustainable approach. In this work, we designed and synthesized a type of multifunctional magnetic MOF nanocomposite catalysts, which could realize the carboxylic cyclization of CO<sub>2</sub> and propargylic alcohols into α-alkylidene cyclic carbonates under solvent-free conditions. Among all the prepared nanocomposites, the MnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>@Cu-MOF nanocomposite is the best in catalytic activity combined with the tetrabutylphosphonium acetate ([Bu<sub>4</sub>P]OAc) ionic liquid cocatalyst. The catalytic system MnFe<sub>2</sub>O<sub>4</sub>@SiO<sub>2</sub>@Cu-MOF/[Bu<sub>4</sub>P]OAc displayed excellent performance in catalyzing the carboxylic cyclization of CO<sub>2</sub> and different propargylic alcohols, and a series of α-alkylidene cyclic carbonates were obtained in high to excellent yields (88 ∼ 98 %) under mild reaction conditions (0.2 MPa, 35 °C). In addition, the two-component catalytic system had high stability and reusability, and can be easily separated and reused up to six consecutive cycles without considerable decrease in catalytic activity. Moreover, using the ionic liquid [Bu<sub>4</sub>P]OAc as the cocatalyst, the nanocomposite had good substrate adaptability for the catalytic carboxylic cyclization, which opens interesting prospects for the development of new magnetic MOF nanocomposites as efficient heterogeneous catalysts for the chemical transformation of CO<sub>2</sub> into value-added chemicals.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101950"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2024-09-24DOI: 10.1016/j.jscs.2024.101944
Yuanlin Shi
In the present study, a novel magnetic heterogeneous copper catalyst was developed by the immobilization of a Cu(II) complex on the surface of magnetic mesoporous nanocomposite (SBA-16@Fe3O4) through post-synthetic method. The synthesized catalyst was analyzed by various characterization methods including FT-IR, EDS, XRD, Nitrogen physisorption, TEM, TGA, VSM, and ICP-OES. After complete characterization, its catalytic efficiency was evaluated in the hydrogenation of nitroarenes to amines. Taking the nitrobenzene reduction of as an example of a reaction, the reaction conditions were optimized by changing diverse parameters like solvent, temperature, time, amount of catalyst, as well as the type and amount of hydrogen source. The catalyst revealed highly efficient catalytic activity in the hydrogenation of numerous nitroarenes to the corresponding aminoarenes in pure water as the solvent with sodium borohydride as a H2 source at room temperature. Additionally, the catalyst could be simply recovered from the mixture of reaction via magnetic separation and was able to mediate the reaction for multiple times with undiminished catalytic performance.
{"title":"Cu(II) complex heterogenized on magnetic mesoporous nanocomposite (SBA-16@Fe3O4) as an efficient catalyst for the reduction of nitro compounds","authors":"Yuanlin Shi","doi":"10.1016/j.jscs.2024.101944","DOIUrl":"10.1016/j.jscs.2024.101944","url":null,"abstract":"<div><div>In the present study, a novel magnetic heterogeneous copper catalyst was developed by the immobilization of a Cu(II) complex on the surface of magnetic mesoporous nanocomposite (SBA-16@Fe<sub>3</sub>O<sub>4</sub>) through post-synthetic method. The synthesized catalyst was analyzed by various characterization methods including FT-IR, EDS, XRD, Nitrogen physisorption, TEM, TGA, VSM, and ICP-OES. After complete characterization, its catalytic efficiency was evaluated in the hydrogenation of nitroarenes to amines. Taking the nitrobenzene reduction of as an example of a reaction, the reaction conditions were optimized by changing diverse parameters like solvent, temperature, time, amount of catalyst, as well as the type and amount of hydrogen source. The catalyst revealed highly efficient catalytic activity in the hydrogenation of numerous nitroarenes to the corresponding aminoarenes in pure water as the solvent with sodium borohydride as a H<sub>2</sub> source at room temperature. Additionally, the catalyst could be simply recovered from the mixture of reaction via magnetic separation and was able to mediate the reaction for multiple times with undiminished catalytic performance.</div></div>","PeriodicalId":16974,"journal":{"name":"Journal of Saudi Chemical Society","volume":"28 6","pages":"Article 101944"},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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