Deep eutectic solvents (DESs) have emerged as promising alternatives to hazardous catalysts and solvents in various chemical transformations. This study presents a facile, green, and simple approach for the synthesis of azlactones using a novel DES system. The reaction between hippuric acid and substituted heterocyclic/aromatic aldehydes in the DES medium efficiently yields 4-arylidene-2-phenyl-5(4H)-oxazolones with excellent purity and high yields in short reaction times. The novel DES consists of lithium perchlorate (LiClO4) as the hydrogen bond acceptor and urea as the hydrogen bond donor. This solvent system is cheap, commercially available, and easy to prepare through a simple, straightforward method. This strategy offers several key advantages, including mild reaction conditions, avoiding harsh reagents and extreme temperatures, and a simple, efficient work-up, minimizing purification steps. It ensures a high-yield economy, consistently achieving 73–97 % yields, while being environmentally friendly, offering a sustainable and non-toxic alternative. The approach demonstrates broad applicability, including pharmaceutically relevant molecules, and enhances DES reusability, improving cost-effectiveness and sustainability.
{"title":"A sustainable approach for the Erlenmeyer synthesis of azlactones in deep eutectic solvents","authors":"Fatemeh Mohammad , Najmedin Azizi , Zohreh Mirjafari , Javad Mokhtari","doi":"10.1016/j.crgsc.2025.100464","DOIUrl":"10.1016/j.crgsc.2025.100464","url":null,"abstract":"<div><div>Deep eutectic solvents (DESs) have emerged as promising alternatives to hazardous catalysts and solvents in various chemical transformations. This study presents a facile, green, and simple approach for the synthesis of azlactones using a novel DES system. The reaction between hippuric acid and substituted heterocyclic/aromatic aldehydes in the DES medium efficiently yields 4-arylidene-2-phenyl-5(4H)-oxazolones with excellent purity and high yields in short reaction times. The novel DES consists of lithium perchlorate (LiClO<sub>4</sub>) as the hydrogen bond acceptor and urea as the hydrogen bond donor. This solvent system is cheap, commercially available, and easy to prepare through a simple, straightforward method. This strategy offers several key advantages, including mild reaction conditions, avoiding harsh reagents and extreme temperatures, and a simple, efficient work-up, minimizing purification steps. It ensures a high-yield economy, consistently achieving 73–97 % yields, while being environmentally friendly, offering a sustainable and non-toxic alternative. The approach demonstrates broad applicability, including pharmaceutically relevant molecules, and enhances DES reusability, improving cost-effectiveness and sustainability.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100464"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100480
Sooraj S. Nayak , Arun M. Isloor , Somasekhara Rao Todeti , Ahmad Fauzi Ismail
Water pollution caused by industrialization poses a great threat to the living organisms mainly due to the release of dye wastewater and pollutants into the water bodies. Ingestion of such polluted water has detrimental effects on living organisms. To address the issue, the present study focuses on the synthesis of poly-m-aminophenol functionalized graphitic carbon nitride (FCNs) using inexpensive graphitic carbon nitride and m-aminophenol. The synthesized FCNs were characterized with FTIR, XPS, XRD, TGA, DTA, Zeta potential, Particle size, TEM and BET analysis. These FCNs were further incorporated into the hollow fiber membrane and subsequently analyzed using SEM, AFM, Zeta potential, Hydrophilicity, and performance studies. Among the fabricated membranes, the optimized CN-AP 50 membrane exhibited enhanced an average water permeability of 150 Lm-2 h−1 bar −1 and a Flux recovery ratio of 49.9 % with 11.9 % of reversible fouling. Furthermore, the membrane also displayed excellent dye rejection capacity of >99 % for Congo red, >98 % for Reactive black 5, and 86 % for Reactive orange 16. Additionally, it showed impressive heavy metal ion removal capability of 99 % for lead ions and 60 % for mercury ions in the presence of humic acid. These enhanced rejection and water permeability are due to the various effects such as improved hydrophilicity, electrostatic interaction between functional groups, π-π interaction with the dye molecules. These effects also modify the membrane morphology thereby enhancing size exclusion and adsorption capabilities. The present study discusses a strategy for incorporating poly-m-aminophenol functionalized graphitic carbon nitride as an additive in membrane fabrication. The functionalized material improves water permeability, antifouling performance, and membrane selectivity, thus offering a scalable route for advanced wastewater treatment technologies.
{"title":"Engineering hollow fiber membranes with poly-m-aminophenol functionalized graphitic carbon nitride for efficient water purification","authors":"Sooraj S. Nayak , Arun M. Isloor , Somasekhara Rao Todeti , Ahmad Fauzi Ismail","doi":"10.1016/j.crgsc.2025.100480","DOIUrl":"10.1016/j.crgsc.2025.100480","url":null,"abstract":"<div><div>Water pollution caused by industrialization poses a great threat to the living organisms mainly due to the release of dye wastewater and pollutants into the water bodies. Ingestion of such polluted water has detrimental effects on living organisms. To address the issue, the present study focuses on the synthesis of poly-<em>m</em>-aminophenol functionalized graphitic carbon nitride (FCNs) using inexpensive graphitic carbon nitride and <em>m</em>-aminophenol. The synthesized FCNs were characterized with FTIR, XPS, XRD, TGA, DTA, Zeta potential, Particle size, TEM and BET analysis. These FCNs were further incorporated into the hollow fiber membrane and subsequently analyzed using SEM, AFM, Zeta potential, Hydrophilicity, and performance studies. Among the fabricated membranes, the optimized CN-AP 50 membrane exhibited enhanced an average water permeability of 150 Lm<sup>-2</sup> h<sup>−1</sup> bar <sup>−1</sup> and a Flux recovery ratio of 49.9 % with 11.9 % of reversible fouling. Furthermore, the membrane also displayed excellent dye rejection capacity of >99 % for Congo red, >98 % for Reactive black 5, and 86 % for Reactive orange 16. Additionally, it showed impressive heavy metal ion removal capability of 99 % for lead ions and 60 % for mercury ions in the presence of humic acid. These enhanced rejection and water permeability are due to the various effects such as improved hydrophilicity, electrostatic interaction between functional groups, π-π interaction with the dye molecules. These effects also modify the membrane morphology thereby enhancing size exclusion and adsorption capabilities. The present study discusses a strategy for incorporating poly-<em>m</em>-aminophenol functionalized graphitic carbon nitride as an additive in membrane fabrication. The functionalized material improves water permeability, antifouling performance, and membrane selectivity, thus offering a scalable route for advanced wastewater treatment technologies.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100480"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100474
Le Thi Kim Loan , Le Thi Nhu Thao , Bui The Vinh , Chaiyut Mansamut , Ngo Van Tai
This study is the first application of a combined sonication and enzyme extraction technique as green technology to recover biological compounds from the peel of red-fleshed dragon fruit, utilizing Response Surface Methodology (RSM) and Artificial Neural Network-Genetic Algorithm (ANN-GA). The peel of dragon fruit had sonication pretreatment for 10–30 min (X1), followed by hydrolysis using 0.1 % Pectinex Ultra SP-L enzyme at temperatures ranging from 30 to 60 °C (X2) for a duration of 60–120 min (X3). The Box-Behnken design was employed to structure the experiment. The levels of polyphenol, betacyanin, and antioxidant activity in the extract were utilized to assess the efficacy of the extraction method. The research demonstrated a substantial enhancement in efficiency by the application of ultrasound pretreatment during the enzymatic hydrolysis of dragon fruit peel. The study identified the ideal parameters for the extraction process using the ANN-GA approach, which include an ultrasonic duration of 27.5 min, an enzyme incubation temperature of 47.1 °C, and an enzyme incubation duration of 135.1 min. Under these conditions, the extract exhibited a total phenolic content of 165.34 mg GAE/g peel weight, betacyanin content of 131.87 mg/100 g peel weight, and an antioxidant activity of 0.92 mg TE/100 g by using DPPH radical scavenging activity assay. The research demonstrated that dual treatment enhances the extraction process of chemicals from by-products, particularly dragon fruit peel. The study established a foundation for future research on the utilization and integration of effective extraction technologies to enhance the quality of extracts for use in the food sector.
{"title":"Enhancing antioxidant extraction efficiency from red dragon fruit peel by green approach using novel optimization technique","authors":"Le Thi Kim Loan , Le Thi Nhu Thao , Bui The Vinh , Chaiyut Mansamut , Ngo Van Tai","doi":"10.1016/j.crgsc.2025.100474","DOIUrl":"10.1016/j.crgsc.2025.100474","url":null,"abstract":"<div><div>This study is the first application of a combined sonication and enzyme extraction technique as green technology to recover biological compounds from the peel of red-fleshed dragon fruit, utilizing Response Surface Methodology (RSM) and Artificial Neural Network-Genetic Algorithm (ANN-GA). The peel of dragon fruit had sonication pretreatment for 10–30 min (X<sub>1</sub>), followed by hydrolysis using 0.1 % Pectinex Ultra SP-L enzyme at temperatures ranging from 30 to 60 °C (X<sub>2</sub>) for a duration of 60–120 min (X<sub>3</sub>). The Box-Behnken design was employed to structure the experiment. The levels of polyphenol, betacyanin, and antioxidant activity in the extract were utilized to assess the efficacy of the extraction method. The research demonstrated a substantial enhancement in efficiency by the application of ultrasound pretreatment during the enzymatic hydrolysis of dragon fruit peel. The study identified the ideal parameters for the extraction process using the ANN-GA approach, which include an ultrasonic duration of 27.5 min, an enzyme incubation temperature of 47.1 °C, and an enzyme incubation duration of 135.1 min. Under these conditions, the extract exhibited a total phenolic content of 165.34 mg GAE/g peel weight, betacyanin content of 131.87 mg/100 g peel weight, and an antioxidant activity of 0.92 mg TE/100 g by using DPPH radical scavenging activity assay. The research demonstrated that dual treatment enhances the extraction process of chemicals from by-products, particularly dragon fruit peel. The study established a foundation for future research on the utilization and integration of effective extraction technologies to enhance the quality of extracts for use in the food sector.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100474"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100449
Giuseppe Timpanaro, Vera Teresa Foti
This study investigates the economic viability of extracting bioproducts from discarded cactus pear (Opuntia ficus-indica) waste in Sicily, where the cactus pear industry is well-established. The focus is on employing green extraction technologies, such as microwave-assisted methods, to produce valuable compounds like seed oil, pectin, and bioactive substances for use in the cosmetic, nutraceutical, and pharmaceutical industries. The results demonstrate that increasing the scale of production from 200 to 400 tons significantly enhances the financial performance of the operation, reducing the payback period from 6.5 to 4 years and yielding positive Net Present Value (NPV) and Internal Rate of Return (IRR) values, reaching up to 35.7 %. However, challenges such as the seasonality of raw material availability and the high energy requirements of green technologies are noted. These findings suggest that while the project is economically feasible, managing supply chain variability and optimising energy consumption are critical for long-term sustainability. Additionally, the increasing consumer demand for sustainable and functional products provides a strong market opportunity for these bioproducts, though competition from international players leveraging economies of scale could pose a threat. This study highlights the importance of integrating green technologies in bioeconomy projects and offers insights for policymakers and industry leaders. Policymakers can support these initiatives through incentives and regulations, while businesses in the cosmetic and nutraceutical sectors may find competitive advantages in the quality and sustainability of these bioproducts. Further research should explore alternative biomass sources and innovations in extraction efficiency to ensure continuous production and cost reductions.
{"title":"Sustainable extraction of bioproducts from cactus pear waste: Economic viability and market opportunities in a green economy","authors":"Giuseppe Timpanaro, Vera Teresa Foti","doi":"10.1016/j.crgsc.2025.100449","DOIUrl":"10.1016/j.crgsc.2025.100449","url":null,"abstract":"<div><div>This study investigates the economic viability of extracting bioproducts from discarded cactus pear (Opuntia ficus-indica) waste in Sicily, where the cactus pear industry is well-established. The focus is on employing green extraction technologies, such as microwave-assisted methods, to produce valuable compounds like seed oil, pectin, and bioactive substances for use in the cosmetic, nutraceutical, and pharmaceutical industries. The results demonstrate that increasing the scale of production from 200 to 400 tons significantly enhances the financial performance of the operation, reducing the payback period from 6.5 to 4 years and yielding positive Net Present Value (NPV) and Internal Rate of Return (IRR) values, reaching up to 35.7 %. However, challenges such as the seasonality of raw material availability and the high energy requirements of green technologies are noted. These findings suggest that while the project is economically feasible, managing supply chain variability and optimising energy consumption are critical for long-term sustainability. Additionally, the increasing consumer demand for sustainable and functional products provides a strong market opportunity for these bioproducts, though competition from international players leveraging economies of scale could pose a threat. This study highlights the importance of integrating green technologies in bioeconomy projects and offers insights for policymakers and industry leaders. Policymakers can support these initiatives through incentives and regulations, while businesses in the cosmetic and nutraceutical sectors may find competitive advantages in the quality and sustainability of these bioproducts. Further research should explore alternative biomass sources and innovations in extraction efficiency to ensure continuous production and cost reductions.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100449"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509883","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}
This study explores the adsorption kinetics and capacity of Fe(III) ions from aqueous solutions onto activated carbon synthesized from coconut shells. The carbonization process was conducted at 700 °C for 1 h, followed by activation with zinc chloride (ZnCl2) as the activating agent. The resulting activated carbon was characterized using nitrogen adsorption isotherms, X-ray diffraction (XRD), and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The absorbance of Fe(III) solutions was quantitatively analyzed using UV–Vis spectroscopy. Activated carbon derived from coconut shells was employed as an adsorbent for Fe(III) Nitrate solutions. The study systematically investigated several parameters influencing the adsorption process, including initial ion concentration, contact time, and varying weights of activated carbon. Characterization results indicated a specific surface area of 490.29 m2/g, with a predominately amorphous aromatic carbon structure and a carbon content of approximately 86.41 % by weight. The maximum adsorption capacity for Fe(III) Nitrate was observed to be 60.95 mg/g for a carbon weight of 0.005 g and 50.95 mg/g for a carbon weight of 0.01 g. Notably, the highest removal efficiency reached 83.81 % with an activated carbon weight of 0.5 g.
{"title":"Absorbance study on the adsorptive removal of Fe(III) ions using activated carbon from coconut shells","authors":"Otong Nurhilal , Adam Bagaskara , Aufa Haritsah Sihite , Sahrul Hidayat , Setianto Setianto","doi":"10.1016/j.crgsc.2025.100458","DOIUrl":"10.1016/j.crgsc.2025.100458","url":null,"abstract":"<div><div>This study explores the adsorption kinetics and capacity of Fe(III) ions from aqueous solutions onto activated carbon synthesized from coconut shells. The carbonization process was conducted at 700 °C for 1 h, followed by activation with zinc chloride (ZnCl<sub>2</sub>) as the activating agent. The resulting activated carbon was characterized using nitrogen adsorption isotherms, X-ray diffraction (XRD), and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The absorbance of Fe(III) solutions was quantitatively analyzed using UV–Vis spectroscopy. Activated carbon derived from coconut shells was employed as an adsorbent for Fe(III) Nitrate solutions. The study systematically investigated several parameters influencing the adsorption process, including initial ion concentration, contact time, and varying weights of activated carbon. Characterization results indicated a specific surface area of 490.29 m<sup>2</sup>/g, with a predominately amorphous aromatic carbon structure and a carbon content of approximately 86.41 % by weight. The maximum adsorption capacity for Fe(III) Nitrate was observed to be 60.95 mg/g for a carbon weight of 0.005 g and 50.95 mg/g for a carbon weight of 0.01 g. Notably, the highest removal efficiency reached 83.81 % with an activated carbon weight of 0.5 g.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100458"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100456
Farzaneh Mohamadpour
Cetyltrimethylammonium bromide (CTAB) is used as a catalyst in a green process to produce pyrano[2,3-d]pyrimidine scaffolds using green chemistry techniques. This is achieved by employing an aqueous micellar medium to combine barbituric acid/1,3-dimethylbarbituric acid, malononitrile, and aryl aldehydes in an environmentally friendly manner at 50 °C. This environmentally friendly process is associated with a one-pot, easy accessibility, affordable reaction media, safe reaction conditions, no need for column chromatography for separation, and effective resource use.
{"title":"Green synthesis of pyrano[2,3-d]pyrimidine scaffolds in cetyltrimethylammonium bromide (CTAB) micellar media","authors":"Farzaneh Mohamadpour","doi":"10.1016/j.crgsc.2025.100456","DOIUrl":"10.1016/j.crgsc.2025.100456","url":null,"abstract":"<div><div>Cetyltrimethylammonium bromide (CTAB) is used as a catalyst in a green process to produce pyrano[2,3-<em>d</em>]pyrimidine scaffolds using green chemistry techniques. This is achieved by employing an aqueous micellar medium to combine barbituric acid/1,3-dimethylbarbituric acid, malononitrile, and aryl aldehydes in an environmentally friendly manner at 50 °C. This environmentally friendly process is associated with a one-pot, easy accessibility, affordable reaction media, safe reaction conditions, no need for column chromatography for separation, and effective resource use.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100456"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Platinum (Pt) and palladium (Pd) -based catalysts have sparked intense research interest for many important reactions in green energy and sustainable technologies such as key industrial petrochemical processes, fine chemical synthesis, environmental protection, renewable energy conversion and microbial, as their specific activity, stability and selectivity are greatly higher. However, the availability of low-cost electrodes/catalysts with high activity and stable electrochemical performance is crucial for the development of long-term and cost-effective green energy, environmental and sustainable technologies. In response to the growing demand for these products, the development of strategies to produce various materials is being intensified. This review summarizes the recent research efforts to develop advanced noble metal-based electrocatalysts with excellent performance for water splitting catalysis, CO2 reduction, electrochemical sensors and antimicrobial applications. Pt and Pd co-catalysts in photocatalytic water splitting are examined for their contributions to clean hydrogen production, with a focus on bandgap adjustment, reduced recombination time, and enhanced charge carrier separation. The electrochemical reduction of carbon dioxide is also explored, highlighting the selectivity and efficiency of Pt and Pd systems, addressing both carbon capture and the generation of valuable chemicals. Similarly, their role as co-catalysts in photocatalytic carbon dioxide reduction is discussed for improved efficiency and selectivity. The review also addresses Pt- and Pd-based electrochemical sensors, emphasizing their catalytic roles in medical diagnostics and gas sensing. Further, the antimicrobial properties of Pt and Pd nanoparticles are explored, showcasing their potent inhibition of bacterial growth, disruption of biofilm formation, and effectiveness against multidrug-resistant bacteria. Additionally, the unique attributes of metal nanoclusters for biomedical sensing and imaging applications are discussed. Finally, a personal outlook is given to highlight the challenges and opportunities for the development of novel electrocatalysts suitable for a wide range of commercial applications in fostering advancements in sustainable technologies and materials.
{"title":"Advancement of Pt and Pd-based catalysis for green, sustainable energy and bio-medical applications","authors":"Nithyadharseni Palaniyandy , Sekhosana Kutloano , Lakshmi Devaraj , Xolile Fuku , Sathish Sundar Dhilip Kumar","doi":"10.1016/j.crgsc.2025.100446","DOIUrl":"10.1016/j.crgsc.2025.100446","url":null,"abstract":"<div><div>Platinum (Pt) and palladium (Pd) -based catalysts have sparked intense research interest for many important reactions in green energy and sustainable technologies such as key industrial petrochemical processes, fine chemical synthesis, environmental protection, renewable energy conversion and microbial, as their specific activity, stability and selectivity are greatly higher. However, the availability of low-cost electrodes/catalysts with high activity and stable electrochemical performance is crucial for the development of long-term and cost-effective green energy, environmental and sustainable technologies. In response to the growing demand for these products, the development of strategies to produce various materials is being intensified. This review summarizes the recent research efforts to develop advanced noble metal-based electrocatalysts with excellent performance for water splitting catalysis, CO<sub>2</sub> reduction, electrochemical sensors and antimicrobial applications. Pt and Pd co-catalysts in photocatalytic water splitting are examined for their contributions to clean hydrogen production, with a focus on bandgap adjustment, reduced recombination time, and enhanced charge carrier separation. The electrochemical reduction of carbon dioxide is also explored, highlighting the selectivity and efficiency of Pt and Pd systems, addressing both carbon capture and the generation of valuable chemicals. Similarly, their role as co-catalysts in photocatalytic carbon dioxide reduction is discussed for improved efficiency and selectivity. The review also addresses Pt- and Pd-based electrochemical sensors, emphasizing their catalytic roles in medical diagnostics and gas sensing. Further, the antimicrobial properties of Pt and Pd nanoparticles are explored, showcasing their potent inhibition of bacterial growth, disruption of biofilm formation, and effectiveness against multidrug-resistant bacteria. Additionally, the unique attributes of metal nanoclusters for biomedical sensing and imaging applications are discussed. Finally, a personal outlook is given to highlight the challenges and opportunities for the development of novel electrocatalysts suitable for a wide range of commercial applications in fostering advancements in sustainable technologies and materials.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100446"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167772","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}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100487
Reza Soleimani , Bayramali Mohammadnezhad , Seyed Abbas Hosseini
Given the scarcity of water resources and the irreversible environmental impact of wastewater discharge, metal-organic frameworks (MOFs) have been studied using an environmentally friendly approach known as solvent-free or green synthesis. In this study, ZIF-8 crystals embedded with nickel metal (ZnNi/ZIF-8) were synthesized using a green approach to enhance their performance, promote synergistic effects, and improve environmental friendliness. The crystal structure, functional groups, surface area, and morphology of ZIF-8 and ZnNi/ZIF-8 nanocomposites were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N2 adsorption-desorption isotherms (BET), and scanning electron microscopy (SEM). These nanocomposites were employed to remove Acid Blue 92, an anionic dye, from aqueous solutions. The adsorption kinetics of Acid Blue 92 followed a pseudo-second-order model, with a high correlation coefficient of 0.99. The adsorption isotherms of ZIF-8 and the nanocomposite (ZnNi/ZIF-8) were described by the Langmuir model, with maximum adsorption capacities of 403 and 458 mg/g, respectively. Under optimal conditions, including an initial concentration of 25 mg/L, a pH of 3, a contact time of 120 min, and a dose of 6 mg, the ZnNi/ZIF-8 nanocomposite exhibited an adsorption capacity of 387 mg/L and a removal efficiency of 93.6 %. Due to its environmentally friendly nature, the prepared ZnNi/ZIF-8 nanocomposite is a promising candidate for efficient treatment of anionic wastewater. The adsorption mechanism primarily involves hydrogen bonds, dipole-induced dipole bonds, π-π donor-acceptor interactions, and the hydrophobic effect.
{"title":"Green synthesis of ZnNi/ZIF-8 composites for efficient anionic dye removal: A sustainable approach to wastewater treatment","authors":"Reza Soleimani , Bayramali Mohammadnezhad , Seyed Abbas Hosseini","doi":"10.1016/j.crgsc.2025.100487","DOIUrl":"10.1016/j.crgsc.2025.100487","url":null,"abstract":"<div><div>Given the scarcity of water resources and the irreversible environmental impact of wastewater discharge, metal-organic frameworks (MOFs) have been studied using an environmentally friendly approach known as solvent-free or green synthesis. In this study, ZIF-8 crystals embedded with nickel metal (ZnNi/ZIF-8) were synthesized using a green approach to enhance their performance, promote synergistic effects, and improve environmental friendliness. The crystal structure, functional groups, surface area, and morphology of ZIF-8 and ZnNi/ZIF-8 nanocomposites were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N<sub>2</sub> adsorption-desorption isotherms (BET), and scanning electron microscopy (SEM). These nanocomposites were employed to remove Acid Blue 92, an anionic dye, from aqueous solutions. The adsorption kinetics of Acid Blue 92 followed a pseudo-second-order model, with a high correlation coefficient of 0.99. The adsorption isotherms of ZIF-8 and the nanocomposite (ZnNi/ZIF-8) were described by the Langmuir model, with maximum adsorption capacities of 403 and 458 mg/g, respectively. Under optimal conditions, including an initial concentration of 25 mg/L, a pH of 3, a contact time of 120 min, and a dose of 6 mg, the ZnNi/ZIF-8 nanocomposite exhibited an adsorption capacity of 387 mg/L and a removal efficiency of 93.6 %. Due to its environmentally friendly nature, the prepared ZnNi/ZIF-8 nanocomposite is a promising candidate for efficient treatment of anionic wastewater. The adsorption mechanism primarily involves hydrogen bonds, dipole-induced dipole bonds, π-π donor-acceptor interactions, and the hydrophobic effect.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100487"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100501
Olusegun K. Abass , Gbemi F. Abass , Yaoyin Lou , Oluwasegun E. Ajayi , Wright J. Onyia , Peace H. Bassey , Oluwaseun T. Faloye , David Bala
- Nucleophilic substitution-based synthesis is gaining prominence as it imparts unique properties on hybrid organic–inorganic nanomaterials and is playing an increasingly important role in catalysis and solar energy conversion process. Herein, we report a novel, three-steps green synthesis of magnesio-thermically synthesized silicon carbide (SiC) nanoparticles nucleophilically grafted on piperazine-modified reduced graphene oxide (PZ-rGO) nanosheets. This method yielded 20–200 nm SiC nanoparticles decorated on several nano-thin layers of PZ-rGO nanosheets. Subsequently, the interfacial and optical properties of SiC/PZ-rGO nanoheterostructure (NHS) were investigated via electronic and structural characterization techniques. The SiC/PZ-rGO NHS exhibits a narrower band gap than its constituent components, with an energy gap of 3.10 eV, in contrast to the individual band gaps of 4.01 eV for SiC and 3.97 eV for PZ-rGO. The reconstruction of the Fermi level to 0.09 eV in the SiC/PZ-rGO NHS indicates charge transfer and band bending at the interface, which is attributed to the formation of type-II (staggered) heterostructure following band alignment at the SiC/PZ-rGO interface. Moreover, for the two heterostructures (SiC and PZ-rGO), the electron transitions predominantly occur between the distinct components, significantly enhancing the effective separation of photogenerated charge carriers. This study not only demonstrates that the SiC/PZ-rGO NHS is a promising photocatalyst but also provides valuable insights into the underlying mechanisms governing the photocatalytic behavior of SiC/PZ-rGO hybrid semiconductor nanomaterials.
{"title":"Green synthesis and investigation of novel SiC/PZ-rGO nanoheterostructure as promising photocatalyst via empirical analysis","authors":"Olusegun K. Abass , Gbemi F. Abass , Yaoyin Lou , Oluwasegun E. Ajayi , Wright J. Onyia , Peace H. Bassey , Oluwaseun T. Faloye , David Bala","doi":"10.1016/j.crgsc.2025.100501","DOIUrl":"10.1016/j.crgsc.2025.100501","url":null,"abstract":"<div><div>- Nucleophilic substitution-based synthesis is gaining prominence as it imparts unique properties on hybrid organic–inorganic nanomaterials and is playing an increasingly important role in catalysis and solar energy conversion process. Herein, we report a novel, three-steps green synthesis of magnesio-thermically synthesized silicon carbide (SiC) nanoparticles nucleophilically grafted on piperazine-modified reduced graphene oxide (PZ-rGO) nanosheets. This method yielded 20–200 nm SiC nanoparticles decorated on several nano-thin layers of PZ-rGO nanosheets. Subsequently, the interfacial and optical properties of SiC/PZ-rGO nanoheterostructure (NHS) were investigated via electronic and structural characterization techniques. The SiC/PZ-rGO NHS exhibits a narrower band gap than its constituent components, with an energy gap of 3.10 eV, in contrast to the individual band gaps of 4.01 eV for SiC and 3.97 eV for PZ-rGO. The reconstruction of the Fermi level to 0.09 eV in the SiC/PZ-rGO NHS indicates charge transfer and band bending at the interface, which is attributed to the formation of type-II (staggered) heterostructure following band alignment at the SiC/PZ-rGO interface. Moreover, for the two heterostructures (SiC and PZ-rGO), the electron transitions predominantly occur between the distinct components, significantly enhancing the effective separation of photogenerated charge carriers. This study not only demonstrates that the SiC/PZ-rGO NHS is a promising photocatalyst but also provides valuable insights into the underlying mechanisms governing the photocatalytic behavior of SiC/PZ-rGO hybrid semiconductor nanomaterials.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100501"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145620716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01DOI: 10.1016/j.crgsc.2024.100398
Fereshteh Norouzi, Amir Abdolmaleki
In a one-pot tandem condensation reaction, three functional ionic liquids (ILs) derived from pyridinium were employed as green, reusable, and efficient catalysts for the synthesis of important medicinal chemistry derivatives such as 2-amino-4H-chromenes. Additionally, benzimidazoles and benzothiazoles were synthesized using these catalysts. The ILs were favored for their easy set-up, high yields, and short synthesis times for the desired products. Moreover, the ILs could be easily recovered and reuse multiple times without significant loss of catalytic activity. Characterization of the synthesized compound was achieved through FT-IR, 1H NMR, 13C NMR, TGA and melting point analysis. The compounds were prepared with good to excellent isolated yields under mild conditions, while the synthesis of benzimidazoles and benzothiazole derivatives was successful at both reflux and room temperature conditions. Finally, each class of compound was described along with its corresponding synthesis mechanism.
{"title":"Facile protocol, metal-free, one-pot synthesis of 2-amino-4H-chromenes, benzimidazoles, and benzothiazoles via acidic ionic liquids based on pyridinium","authors":"Fereshteh Norouzi, Amir Abdolmaleki","doi":"10.1016/j.crgsc.2024.100398","DOIUrl":"https://doi.org/10.1016/j.crgsc.2024.100398","url":null,"abstract":"<div><p>In a one-pot tandem condensation reaction, three functional ionic liquids (ILs) derived from pyridinium were employed as green, reusable, and efficient catalysts for the synthesis of important medicinal chemistry derivatives such as 2-amino-4<em>H</em>-chromenes. Additionally, benzimidazoles and benzothiazoles were synthesized using these catalysts. The ILs were favored for their easy set-up, high yields, and short synthesis times for the desired products. Moreover, the ILs could be easily recovered and reuse multiple times without significant loss of catalytic activity. Characterization of the synthesized compound was achieved through FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, TGA and melting point analysis. The compounds were prepared with good to excellent isolated yields under mild conditions, while the synthesis of benzimidazoles and benzothiazole derivatives was successful at both reflux and room temperature conditions. Finally, each class of compound was described along with its corresponding synthesis mechanism.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"8 ","pages":"Article 100398"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086524000031/pdfft?md5=63bc02acf9dcc2ffd1ae6f3d8b230897&pid=1-s2.0-S2666086524000031-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140066970","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}
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