Current Research in Green and Sustainable Chemistry最新文献

{"title":"Selective electro-oxidation of cumene utilizing a flow reactor equipped with diamond electrodes","authors":"Shogo Nihongi ,&nbsp;Riyako Matsuoka ,&nbsp;Tsuyoshi Saitoh ,&nbsp;Yasuaki Einaga ,&nbsp;Takashi Yamamoto","doi":"10.1016/j.crgsc.2023.100378","DOIUrl":"10.1016/j.crgsc.2023.100378","url":null,"abstract":"<div><p>Although oxidation of benzylic C(sp³)−H bonds is an important process for synthesizing biologically active compounds, the reactions generically require hazardous reagents, catalysts, and harsh conditions. Since electro-organic synthesis utilizes electricity itself as a reagent, reactions can proceed well even under ambient conditions. Herein, we report a selective oxidation of cumene in an electrochemical flow reactor. Cumyl alcohol was selectively obtained under optimum amount of charge and current density. The selective oxidation of cumene to cumyl alcohol was achieved because overoxidation of cumyl alcohol into acetophenone was suppressed by the electrochemical flow reactor.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100378"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086523000243/pdfft?md5=a92a72c5191a466f5a29d2f767d0a427&pid=1-s2.0-S2666086523000243-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135909360","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}

{"title":"Comparative study of anti-ulcer drugs with benzimidazole ring as green corrosion inhibitors in acidic solution: Quantum chemical studies","authors":"Nushrat Jahan Rinky,&nbsp;Md Mayeedul Islam,&nbsp;Jewel Hossen,&nbsp;Md Al-Amin-Al-Azadul Islam","doi":"10.1016/j.crgsc.2023.100385","DOIUrl":"10.1016/j.crgsc.2023.100385","url":null,"abstract":"<div><p>The corrosion of metals in acidic environments is a grave concern, with the conventional use of commercial corrosion inhibitors leading to environmental toxicity. To address this issue, non-toxic, cost-effective drugs that have a minimal impact on the environment have the potential to replace traditional toxic inhibitors. This study aims to evaluate the molecular orbital properties of benzimidazole-containing drugs such as omeprazole, esomeprazole, and pantoprazole, through density functional theory (DFT), to assess their ability to act as corrosion inhibitors and explore their mechanism of inhibition. The study found that all three compounds have the ability to form a barrier film on the metal surface, with omeprazole being slightly more reactive than the others. Omeprazole and esomeprazole were found to be softer than pantoprazole, indicating that they are more reactive towards the metal surface. The study also found that the active sites of all compounds are located in the benzimidazole ring along with the methyl and methoxy groups. Additionally, the inhibitor molecules are adsorbed onto the metal surface through the active sites by transferring their electrons towards the metal surface. The adsorption energy calculation indicates that Omeprazole and Pantoprazole, with more negative adsorption free energy, exhibit superior corrosion inhibition ability compared to Pantoprazole. Overall, the study provides valuable insights into the potential use of these drugs as effective corrosion inhibitors.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100385"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086523000310/pdfft?md5=dbd1a73eed805551d6a346826f83ba44&pid=1-s2.0-S2666086523000310-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135604271","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}

{"title":"Green trimellitic anhydride and hemimellitic anhydride from malic acid","authors":"Aleksei Ananin,&nbsp;William Bradley,&nbsp;George A. Kraus","doi":"10.1016/j.crgsc.2023.100357","DOIUrl":"https://doi.org/10.1016/j.crgsc.2023.100357","url":null,"abstract":"<div><p>A direct synthesis of trimellitic anhydride (TMA) and hemimellitic anhydride (HMA) has been reported in which all the carbons of TMA and HMA are derived from malic acid. Acetoxy succinic anhydride represents a convenient in situ equivalent of maleic anhydride.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"6 ","pages":"Article 100357"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2701722","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}

{"title":"A comparison of nano-celluloses prepared with various terms of time and sulfuric acid concentration from bagasse derived cellulose: Physicochemical characteristics and process optimization","authors":"Nabiha I. Abdo ,&nbsp;Yasser M. Tufik ,&nbsp;Sohier M. Abobakr","doi":"10.1016/j.crgsc.2023.100365","DOIUrl":"https://doi.org/10.1016/j.crgsc.2023.100365","url":null,"abstract":"<div><p>Cellulose in nano-meter domain or aka nano-cellulose (NC) has enticed much attention from researchers. Segregated cellulose from sugarcane bagasse (SCB) was used in this study, and then hydrolyzed with 40, 50 and 60% sulfuric acid at 45 °C for 90, 30, and 20 min. The impact of the different treatment conditions was evaluated regarding nano-product yields and morphology aspects. The current study discusses the surface morphology, structural and elemental properties of nano-celluloses (NCs). Morphological; X-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and elemental analysis; energy dispersive x-ray diffraction (EDX). Morphological characterization showed the figuration of stick-shaped rods and bundles of NCs with size in the ambit of about 34–49 nm. Elemental analysis (EDX) showed multiple elements in NCs with other major compositions. X-ray diffraction appeared that NCs have diverse crystallinity indices at different nanoscales. We have achieved the main challenges based on; The high concentration of acid used, the short reaction time needed and the smallest size using a 60% concentration of acid in a time of 20 min compared to other concentrations used in this study. Extracted NCs presupposed to have a high potency in many applications. Therefore, NCs are considered a modified biomass with great potential to meet global energy demand and encourage environmental sustainability.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"6 ","pages":"Article 100365"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1515344","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}

{"title":"Additive manufacturing technologies applied to the electrochemical valorization of biomass","authors":"Gianluca Palmara,&nbsp;David Carvajal,&nbsp;Marcileia Zanatta,&nbsp;Elena Mas-Marza,&nbsp;Victor Sans","doi":"10.1016/j.crgsc.2023.100386","DOIUrl":"https://doi.org/10.1016/j.crgsc.2023.100386","url":null,"abstract":"<div><p>Biomass valorization is gaining recognition as a sustainable and easily accessible renewable option to produce fuels and chemicals non-derived from fossil fuels, thus contributing to the decarbonization of the energy and chemical industries. Electrosynthesis represents a potent and advantageous method to transform biomass-based compounds into added-value products, surpassing conventional synthetic pathways in various aspects. Nevertheless, technical and geometrical constraints preclude its widespread implementation and development. Within this context, additive manufacturing has the potential to emerge as a disruptive technology in the field of electrochemical reactions, enabling the creation of custom-designed cells and reactors with intricate geometry. This perspective article delves into the applications of this innovative and widely accessible technology in organic electrosynthesis for biomass valorization, highlighting its potential to enhance performance, optimize mass transport phenomena, and facilitate the design of efficient and scalable electrochemical systems for various applications.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100386"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086523000322/pdfft?md5=2259f2446b06627145afdb9caef31bef&pid=1-s2.0-S2666086523000322-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134651491","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}

{"title":"Strategic development of metal doped TiO2 photocatalysts for enhanced dye degradation activity under UV–Vis irradiation: A review","authors":"Marzia Sultana ,&nbsp;Atol Mondal ,&nbsp;Sumon Islam ,&nbsp;MOST. Afroza Khatun ,&nbsp;Md. Hafezur Rahaman ,&nbsp;Ashok Kumar Chakraborty ,&nbsp;Md. Shahedur Rahman ,&nbsp;Md Mahfuzur Rahman ,&nbsp;Alam S.M. Nur","doi":"10.1016/j.crgsc.2023.100383","DOIUrl":"10.1016/j.crgsc.2023.100383","url":null,"abstract":"<div><p>This review article discusses the potential of using metal-doped TiO₂ as a photocatalyst for dye degradation in water. TiO₂ is a promising photocatalyst but is limited due to its fast electron-hole recombination rate and vast bandgap energy. Metal dopants have enhanced the photocatalytic activity of TiO₂, especially noble metal doping, due to the synergistic effects between the metal dopants and TiO₂. The review summarizes experimental studies on photocatalytic dye degradation using metal-doped TiO₂ and compares the degradation performance between doped and undoped TiO₂. The authors emphasize the importance of understanding the interaction between metal dopants and TiO₂ to improve the dye degradation activity and stability of metal-doped TiO₂. The article highlights the optimum dopant concentration and preparation methods that can improve the textural or surface properties of doped TiO₂ and enhance dye degradation capacity.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100383"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086523000292/pdfft?md5=819606c40582dddda50f482adbed02b5&pid=1-s2.0-S2666086523000292-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135566108","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}

{"title":"Effect of cathode material on electrochemical reduction of levulinic acid to γ-valerolactone and valeric acid in aqueous and organic media","authors":"Galina V. Burmakina ,&nbsp;Dmitry V. Zimonin ,&nbsp;Tatyana A. Kenova ,&nbsp;Victor V. Verpekin ,&nbsp;Valentin V. Sychev ,&nbsp;Nikolay A. Zos'ko ,&nbsp;Oxana P. Taran","doi":"10.1016/j.crgsc.2023.100379","DOIUrl":"10.1016/j.crgsc.2023.100379","url":null,"abstract":"<div><p>The electrochemical conversion of biobased levulinic acid (LA) into renewable chemicals and biofuel precursors represents an important and reasonable alternative to the high temperature conventional catalytic processes of great importance for the development of a sustainable and cost-effective biorefinery. The establishment of the mechanism of levulinic acid reduction is a promising strategy in choosing the optimal electrocatalyst for the redox-transformation of biobased substrates. Herein, we report a new approach to study an electrochemical reduction mechanism of levulinic acid using of proton-deficient non-aqueous reaction media. The electrochemical reduction of levulinic acid to γ-valerolactone (GVL) and valeric acid (VA) in aqueous and organic solutions on various electrodes (glassy carbon, graphite, Al, Pb) was studied. The mechanism of LA electrochemical reduction and major reaction products significantly was found to depend on the solvent, the presence of proton donors, the material of cathode, and the magnitude of the applied potential. In an aqueous solution the process proceeded with the formation of valeric acid on all the electrodes studied. In acetonitrile in the presence of protons, the electrochemical reduction of LA proceeded by various mechanisms, both with the participation of atomic hydrogen and the protonated form of LA, and led to the formation of GVL and/or VA. The difference (ΔE_1/2) between the reduction half-wave potential of protons and levulinic acid was found to play an important role in the reduction pathway of LA carbonyl group. At a large ΔE_1/2, as in the case of the GC electrode, the LA reduction resulted in the GVL formation. LA can be completely reduced to VA by transferring four electrons due to the close reduction potentials of protons and LA (a low ΔE_1/2), as on a Pb electrode. The pathway depends on the conditions of the reduction process and can be estimated based on electrochemical data obtained in the study of reaction products in organic media.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100379"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666086523000255/pdfft?md5=2b96a251984cf9e2e6e77a2a895997ae&pid=1-s2.0-S2666086523000255-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135843480","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}

{"title":"Chromium adsorption from water using mesoporous magnetic iron oxide-aluminum silicate adsorbent: An investigation of adsorption isotherms and kinetics","authors":"Mumtaz Khan ,&nbsp;Islamud Din ,&nbsp;Fazli Aziz ,&nbsp;Imdad Ullah Qureshi ,&nbsp;Muhammad Zahid ,&nbsp;Ghulam Mustafa ,&nbsp;Aroosa Sher ,&nbsp;Said Hakim","doi":"10.1016/j.crgsc.2023.100368","DOIUrl":"https://doi.org/10.1016/j.crgsc.2023.100368","url":null,"abstract":"<div><p>One of the prominent issues of the environment is water quality deterioration due to release of industrial wastewater containing heavy metals. This research work focused on the synthesis of mesoporous magnetic iron oxide-aluminum silicate (Fe₃O₄-Al₂SiO₅) adsorbent via deposition-precipitation method and to assess its efficiency for chromium (VI) adsorption. The study demonstrated that the prepared mesoporous adsorbent exhibit large surface area (476.0 m²g^-1) and mesoporous structure, which enhances the adsorbate adsorption. From the results it was noticed that maximum removal (99.9%) was occurring at neutral pH and the adsorption data was find in best fitting to both Langmuir isotherm as well as with pseudo-second-order kinetic models. The study further concluded that the mesoporous adsorbent can be reused following several cycles and that very slight effect of coexisting competitive ions was noticed. The study recommends that after further modification and activation, the desired mesoporous adsorbent material could be utilized for water purification at industrial level.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"7 ","pages":"Article 100368"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1515342","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}

{"title":"Correlation between morphology and performance of cellulose nanofibril-based films","authors":"Liqing Wei ,&nbsp;Huiyang Bian ,&nbsp;Umesh P. Agarwal ,&nbsp;Ronald C. Sabo ,&nbsp;Laurent M. Matuana ,&nbsp;Nicole M. Stark","doi":"10.1016/j.crgsc.2023.100363","DOIUrl":"https://doi.org/10.1016/j.crgsc.2023.100363","url":null,"abstract":"<div><p>Cellulose nanofibrils (CNFs) were produced from bleached eucalyptus kraft pulp using microfluidization varying the number of passes through the microfluidizer. CNFs were processed into dry films to elucidate the effect of CNFs morphology on the physical, optical and barrier properties of the films. As the number of passes through the microfluidizer increased, the fibril diameter and degree of polymerization decreased. A higher number of passes produced CNFs with smaller diameter resulting in CNF films with smaller root mean surface (RMS) roughness, higher tensile strength and Young's modulus, and higher transparency. CNF films with lower porosity had lower water vapor permeability (WVP) at 50% RH (better barrier properties), but the number of passes did not significantly affect water vapor permeability at 90% RH or oxygen permeability at 50% RH or 90% RH. Increasing the number of microfluidization passes resulted in CNF films with higher density, lower crystallinity, and higher water accessibility. The results suggest that the physical properties, such as density, of the film were more dominant for the mechanism of WVP compared with crystallinity and water accessibility. A model of water vapor transmission through the CNF film was proposed. By establishing a relationship between CNFs morphology and performance characteristics of corresponding films, especially for barrier properties, insights were obtained that would be beneficial for food packaging applications.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"6 ","pages":"Article 100363"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1515345","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}

{"title":"Effects of acidity, number of hydroxyl group, and carbon chain length of carboxylic acids on starch cross-linking","authors":"Gerezgiher Alula Gebresas,&nbsp;Tamás Szabó,&nbsp;Kálmán Marossy","doi":"10.1016/j.crgsc.2022.100354","DOIUrl":"https://doi.org/10.1016/j.crgsc.2022.100354","url":null,"abstract":"<div><p>Corn starch film samples cross-linked using malic, malonic, and succinic acids, and thermoplastic starch were characterized and tested for their water absorption, surface morphology, structural change, and thermomechanical properties. The acids vary in acidity, number of hydroxyl groups, and carbon chain length. The presence of an additional hydroxyl group has helped malic acid form more hydrogen bonding between starch molecules. The relatively higher acidity in malic acid compared to succinic acid is found to be another factor for its better cross-linking potential. The additional carbon chain in succinic acid, which reduces its solubility and acidity; has negatively affected its cross-linking potential. Among the three variables studied, number of hydroxyl group has highly influenced the cross-linking potential, followed by acidity and carbon chain length, respectively. Consequently, the elongation at break and water absorption resistance of thermoplastic starch were improved from 108.63 ​MPa to 175.72 ​MPa and from 140% to 80%, respectively, cross-linking corn starch with malic acid.</p></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"6 ","pages":"Article 100354"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2699608","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}