ACS Sustainable Chemistry & Engineering最新文献_第5页

Mechanochemical Recycling of Acid Anhydride-Cured Epoxy Resin for Functional Applications

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-23 DOI: 10.1021/acssuschemeng.4c09039

Fujie Wang, Qi Wang, Shuangqiao Yang

{"title":"Mechanochemical Recycling of Acid Anhydride-Cured Epoxy Resin for Functional Applications","authors":"Fujie Wang, Qi Wang, Shuangqiao Yang","doi":"10.1021/acssuschemeng.4c09039","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c09039","url":null,"abstract":"Epoxy resin (EP) is a widely used thermosetting resin. However, its cross-linked structure poses a big challenge for recycling into value-added products. This study advanced the recycling of acid anhydride-cured epoxy using solid-state shear milling (S3M) technology. Through this process, the C–C backbone and C–O cross-linking bonds in epoxy resins were destroyed, generating C═O and −OH reactive groups in the reactive epoxy resin powder (REP). When REP-20 (number of milling cycles) is incorporated as an active filler into the original curing system, the tensile strength of the epoxy resin increased from 34.2 to 51.6 MPa, and the flexural strength increased from 57.1 to 82.3 MPa, which were 50.1 and 44.1% enhancement, respectively, compared to REP-1. Futhermore, REP powder can serve as an active filler into epoxy resin with other curing agents, such as curing agent 593 and 4,4-Diaminodiphenylmethane (DDM). By employing REP powder to enhance surface roughness in hydrophobic coating, a contact angle increased 144.1°. Additionally, when REP was utilized in a filter column, it effectively separated water and oil with a separation efficiency of up to 99%. After 10 cycles of operation, the flux and filtration efficiency of the devices remained unchanged, demonstrating excellent stability and reusability. This study provided a new way to recycle thermosetting resins to produce value-added functional fillers for applications such as hydrophobic coatings and oil–water separation.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reverse Electron Transfer-Induced SnS2 Phase Transition for Efficient Photocatalytic CO2–C2H6 Conversion

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-23 DOI: 10.1021/acssuschemeng.4c06819

Qifan Wu, Yaqi Liu, Yichen Liu, Zuozheng Xu, Guicheng Luo, Guangqing Liu, Yun Shan, Shuyi Wu, Lizhe Liu, Zhimin Liu

{"title":"Reverse Electron Transfer-Induced SnS2 Phase Transition for Efficient Photocatalytic CO2–C2H6 Conversion","authors":"Qifan Wu, Yaqi Liu, Yichen Liu, Zuozheng Xu, Guicheng Luo, Guangqing Liu, Yun Shan, Shuyi Wu, Lizhe Liu, Zhimin Liu","doi":"10.1021/acssuschemeng.4c06819","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c06819","url":null,"abstract":"Two-dimensional metal sulfides such as SnS2 play a pivotal role in the field of environmental energy due to their suitable optical bandgap and high specific surface area. However, the steady-state 2H-phase SnS2 suffers from rapid charge recombination and low CO2 catalytic activity, limiting its practical application in photocatalytic CO2 reduction. In this work, we designed a CuPd/SnS2 heterojunction system by loading CuPd nanoparticles onto SnS2 nanosheets (NSs). Under illumination, the hot electrons excited in CuPd nanoparticles induce a 2H-1T-phase transition of SnS2, effectively improving the photogenerated carrier dynamics of the material. Additionally, the post-transition energy level structure facilitates more efficient injection of photogenerated electrons into highly catalytic CuPd particles, achieving the goal of photocatalytic reduction of CO2 to C2H6. Resultingly, the CuPd/SnS2 photocatalytic system achieves a C2H6 production rate of 255.6 μmol g–1 h–1, which is approximately 24.4 times and 3.9 times higher than that of Cu/SnS2 and Pd/SnS2, respectively. Moreover, it boasts a remarkable product selectivity of up to 90.4% for C2H6. This study provides a valuable approach for modulating photogenerated carrier dynamics and enhancing catalytic activity in two-dimensional metal sulfides.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"31 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2-Switchable High Internal Phase Pickering Emulsions Stabilized by Small-Molecular Surfactants and Hydrophilic Silica Nanoparticles

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-23 DOI: 10.1021/acssuschemeng.4c09490

Wanqing Zhang, Miao Lv, Jin Shi, Jianzhong Jiang

{"title":"CO2-Switchable High Internal Phase Pickering Emulsions Stabilized by Small-Molecular Surfactants and Hydrophilic Silica Nanoparticles","authors":"Wanqing Zhang, Miao Lv, Jin Shi, Jianzhong Jiang","doi":"10.1021/acssuschemeng.4c09490","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c09490","url":null,"abstract":"High internal phase Pickering emulsions (HIPPEs) have received increasing attention recently due to their unique viscosity and rheological characteristics. Nevertheless, their high viscosity might limit their applications in the transportation field. Developing HIPPEs with adjustable stability, controllable viscosity, and easy preparation remains a challenge. Here, we reported an O/W HIPPEs costabilized by a novel CO2-switchable nonionic surfactant (NCOEO3) and hydrophilic silica nanoparticles with low concentrations, facilitated by the adsorption of NCOEO3 onto the nanoparticles through hydrogen bonding. Upon increasing the NCOEO3 concentration to 1 mM, the oil volume fraction of the emulsions can be adjusted to 92%. The HIPPEs demonstrate remarkable CO2 responsiveness due to the reversible transformation of the surfactant structure between nonionic (NCOEO3) and cationic-nonionic (N+COEO3) forms triggered by CO2. This responsiveness enables efficient demulsification at room temperature as well as the recycling and recovery of the surfactant within the aqueous phase. More importantly, the inverted highly viscous HIPPEs could be reversibly converted into flowable low viscous HIPPEs through the CO2 trigger. This research offers an effective method for preparing intelligent HIPPEs with adjustable properties, such as stability, viscosity, and an aqueous recyclable emulsifier, which can meet various practical application needs.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"31 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142873953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bamboo Self-Bonding Composites with Superior Water Resistance and Mechanical Performance Prepared with High-Consistency Mechano-Enzymatic Pretreated Bamboo Powders

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-23 DOI: 10.1021/acssuschemeng.4c05613

Peng Cheng, Tuhua Zhong, Xuan Liu, Hong Chen

{"title":"Bamboo Self-Bonding Composites with Superior Water Resistance and Mechanical Performance Prepared with High-Consistency Mechano-Enzymatic Pretreated Bamboo Powders","authors":"Peng Cheng, Tuhua Zhong, Xuan Liu, Hong Chen","doi":"10.1021/acssuschemeng.4c05613","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c05613","url":null,"abstract":"The development of bamboo self-bonding composites (BSBC) has gained growing momentum due to its formaldehyde-free nature and environmental friendliness. However, the inferior mechanical properties and poor water resistance of BSBC have hindered their practical applications. Here, we manufactured BSBC using bamboo processing residue powders as raw materials through high-consistency mechano-enzymatic (HCME) pretreatment, followed by hot pressing. Microscopic examination revealed that HCME pretreatment facilitated bamboo fiber defibrillation, generating subfibrous branches and fragmented parenchyma cells with increased specific surface areas. The mechanical interlocking structure enabled BSBC to achieve a combination of mechanical reinforcement and densification. After 8 h of HCME pretreatment, the porosity of BSBC was only 3.27%, which was 57.1% lower than that without pretreatment. BSBC also demonstrated superior water resistance and mechanical performance. It exhibited a low thickness swelling rate (5.1%), which is a 50.5% reduction compared with BSBC manufactured without HCME pretreatment. Moreover, BSBC exhibited high flexural strength (37.8 MPa) and high internal bonding strength (1.84 MPa) after 8 h of HCME pretreatment, significantly surpassing the industry standard for furniture-grade medium-density fiberboards. Environmentally friendly BSBC, based on HCME pretreatment, is anticipated to be a promising alternative to traditional fiberboards in the furniture industry.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"87 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishing Komagataella phaffii as a Cell Factory for Efficient Production of Cholesterol Sulfate

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-22 DOI: 10.1021/acssuschemeng.4c06112

Feng Xiao, Dongfang Li, Yingjia Pan, Binying Lv, Jucan Gao, Yimeng Zuo, Lei Huang, Jiazhang Lian

{"title":"Establishing Komagataella phaffii as a Cell Factory for Efficient Production of Cholesterol Sulfate","authors":"Feng Xiao, Dongfang Li, Yingjia Pan, Binying Lv, Jucan Gao, Yimeng Zuo, Lei Huang, Jiazhang Lian","doi":"10.1021/acssuschemeng.4c06112","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c06112","url":null,"abstract":"Cholesterol sulfate (CS), a sulfated derivative of cholesterol, has important applications in the medical field, because of its extensive biological and pharmacological activities. As the supply of CS heavily relies on chemical conversion of cholesterol extracted from wool grease, there is growing interest in engineering microbial cell factories for large-scale production of CS. This study reports microbial production of CS in the yeast, Komagataella phaffii (also known as Pichia pastoris), for the first time. Through combinatorial metabolic engineering strategies, including blocking the competing branches, overexpressing the rate-limiting mevalonate pathway genes, manipulating lipid metabolism, and enhancing the supply of key cofactor 3′-phosphoadenosine-5′-phosphosulfate (PAPS), CS production was increased more than 6.8-fold when compared with the parent strain. The optimal strain (CHS0505) produced CS with titers reaching 249 mg/L in a shake flask and 545 mg/L in a fed-batch fermenter, highlighting the potential of K. phaffii as a cell factory for steroid production. More importantly, the development of a CS-producing cell factory will advance microbial production of glycosaminoglycans and other sulfated natural products via synthetic biology.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"24 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142873954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient Hyperbranched Flame Retardant Derived from Quercetin for Use in Epoxy Resin with Well-Balanced Comprehensive Performance

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-22 DOI: 10.1021/acssuschemeng.4c08829

Yun Zhao, Chengshu Yan, Jiatao Cao, Shuai He, Zhenfeng Huang, Nanlan Shen, Zongmin Zhu, Hai-Bo Zhao, Wenhui Rao

{"title":"Efficient Hyperbranched Flame Retardant Derived from Quercetin for Use in Epoxy Resin with Well-Balanced Comprehensive Performance","authors":"Yun Zhao, Chengshu Yan, Jiatao Cao, Shuai He, Zhenfeng Huang, Nanlan Shen, Zongmin Zhu, Hai-Bo Zhao, Wenhui Rao","doi":"10.1021/acssuschemeng.4c08829","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c08829","url":null,"abstract":"Traditional flame retardants, often derived from petrochemical sources, pose significant environmental and health concerns due to their potential toxicity and persistence in the environment. In this study, a biobased hyperbranched polymer flame retardant named QB was synthesized using quercetin and phenylphosphoryl dichloride by a one-step method. The QB copolymer was characterized via Fourier transform infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography, revealing its high thermal stability and polymeric nature, with a weight-average molecular weight of 78 299 g/mol. QB was subsequently incorporated into bisphenol A-type epoxy resins using 4–4 diamino diphenylmethane as a curing agent to prepare the flame-retardant epoxy composite. With additions of only 1 wt % QB, EQB-1 achieved a UL 94 V-0 rating in the vertical burning test and an impressive limiting oxygen index (LOI) value of 28.2%. Moreover, the addition of the 3 wt % QB in EP resulted in a maximum reduction of 32.9% in the peak of heat release rate and a 37.4% reduction in the smoke produce rate, indicating its outstanding flame-retardant and smoke suppression properties, which are attributed to a mainly condensed-phase flame-retardant mechanism. Furthermore, the impact and flexural strength of the composite were maintained and a slight improvement was observed. The findings of this research are expected to contribute to the development of environmentally friendly flame-retardant epoxy systems that meet industry standards while promoting the use of renewable materials. This work supports sustainability by replacing petrochemical flame retardants with renewable quercetin-based materials, reducing toxicity and environmental impact.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"287 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142873955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aqueous and Biphasic Coupling of Furfural and Cyclopentanone for the Synthesis of Bio-Jet Fuel Precursors

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-22 DOI: 10.1021/acssuschemeng.4c09269

Rick Baldenhofer, Jean-Paul Lange, Sascha R. A. Kersten, M. Pilar Ruiz

{"title":"Aqueous and Biphasic Coupling of Furfural and Cyclopentanone for the Synthesis of Bio-Jet Fuel Precursors","authors":"Rick Baldenhofer, Jean-Paul Lange, Sascha R. A. Kersten, M. Pilar Ruiz","doi":"10.1021/acssuschemeng.4c09269","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c09269","url":null,"abstract":"We report on the aldol condensation of furfural and cyclopentanone in aqueous and biphasic mediums as a promising step for producing sustainable aviation fuel. Key parameters, including catalyst concentration, reactant concentration, temperature, and solvent, were found to significantly influence conversion and product selectivity. Alkaline conditions were essential for aldol coupling, with significant conversion observed at pH 12 and higher. The activation energies for the formation of the dimeric and trimeric aldol adducts were similar at 74 and 76 kJ/mol, respectively. Biphasic conditions were employed to prevent product precipitation, leading to reactor and equipment fouling. For biphasic conditions, the extraction of the reactants and dimeric intermediates to the organic phase affected rate and selectivity, resulting in the dilemma. Good product extraction leads to inevitable reactant extraction. Based on these findings, an integrated biphasic process design was proposed, utilizing process-owned solvents to optimize the separation and recycling of aqueous streams and improve the overall process efficiency.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"24 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142873912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Step Synthesis of PtPb Alloy Nanoparticles Via Wet Chemical Method for the Upgraded Recycling of PLA Plastic

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-21 DOI: 10.1021/acssuschemeng.4c06032

Wenlong Pang, Bin Li, Yufeng Wu, Yu Zhang, Jun Yang, Zhongxun Tian, Shaonan Tian, Jianjun Li

{"title":"One-Step Synthesis of PtPb Alloy Nanoparticles Via Wet Chemical Method for the Upgraded Recycling of PLA Plastic","authors":"Wenlong Pang, Bin Li, Yufeng Wu, Yu Zhang, Jun Yang, Zhongxun Tian, Shaonan Tian, Jianjun Li","doi":"10.1021/acssuschemeng.4c06032","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c06032","url":null,"abstract":"Biodegradable plastics such as polylactic acid (PLA) have been extensively applied in numerous fields. Although PLA is degradable in natural environments, its decomposition postdisposal leads to resource wastage. Herein, we first employ enzymatic hydrolysis to degrade PLA. Subsequently, PtPb alloy nanoparticles are synthesized in a single step via a wet chemical method, catalyzing the reformation of the PLA enzymatic hydrolysis products into higher-value chemicals (pyruvic acid). Under conditions of an oxygen flow rate of 60 mL/min, a reaction temperature of 90 °C, and a reaction duration of 60 min, the conversion rate of lactic acid catalytic oxidative dehydrogenation to pyruvic acid reaches an impressive 96.86%, with a selectivity of 95.69%. Moreover, this catalyst exhibits satisfactory stability. Experimental and density functional theory (DFT) calculations are combined to ascertain the active state changes of PtPb and the reaction pathways for the catalytic oxidative dehydrogenation of lactic acid to pyruvic acid, as well as the free energy changes of different catalysts in this transformation. In this work, we employ a simple synthetic strategy to specifically investigate the impact of PtPb alloy nanoparticles under various conditions on the catalytic oxidative dehydrogenation of lactic acid to pyruvic acid, offering a new research avenue for the waste treatment and resource utilization of biodegradable plastics in the future.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"26 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Substrate-Binding Cavity Engineering of the Lipoxygenase from Pseudomonas aeruginosa to Produce 8S- and 11S-Hydroxyeicosatetraenoic Acids

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-21 DOI: 10.1021/acssuschemeng.4c05400

Eun-Ji Seo, Hyo-Ran Lee, Se-Yeun Hwang, Deok-Kun Oh, Yong-Uk Kwon, Katharina Köchl, Bettina Nestl, Jin-Byung Park, Uwe T. Bornscheuer

{"title":"Substrate-Binding Cavity Engineering of the Lipoxygenase from Pseudomonas aeruginosa to Produce 8S- and 11S-Hydroxyeicosatetraenoic Acids","authors":"Eun-Ji Seo, Hyo-Ran Lee, Se-Yeun Hwang, Deok-Kun Oh, Yong-Uk Kwon, Katharina Köchl, Bettina Nestl, Jin-Byung Park, Uwe T. Bornscheuer","doi":"10.1021/acssuschemeng.4c05400","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c05400","url":null,"abstract":"Lipoxygenases catalyze the dioxygenation of polyunsaturated fatty acids. Notably, most microbial lipoxygenases including the lipoxygenase from Pseudomonas aeruginosa (Pa-LOX) catalyze oxygenation of linoleic acid and arachidonic acid into 13S-hydroperoxyoctadecenoic acid (13S-HPODE) and 15S-hydroperoxyeicosatetraenoic acid (15S-HPETE), respectively. Therefore, this study has focused on modification of positional specificity or regioselectivity of Pa-LOX. The linoleic acid oxygenations and substrate-docking simulations suggested that the regioselectivity of Pa-LOX might depend on the geometry of the hydrocarbon tail-binding cavity. Therefore, the interior end of the substrate-binding cavity was enlarged to make C10 instead of C13 face the iron active site. Remarkably, the M434G mutation led to alteration of the oxygenation products from 15S-hydroxyeicosatetraenoic acid (15S-HPETE) to 11S-HPETE as the major product from arachidonic acid. On the other hand, the Y609G substitution allowed the formation of 8S-HPETE from arachidonic acid. 8S-HPETE was recovered after reduction by tris(2-carboxyethyl)phosphine hydrochloride with an isolated yield of 62% with a purity of 94% via Escherichia coli-based whole-cell biocatalysis, solvent extraction, and silica gel chromatography. This is the first report of the production of 11S-HPETE and 8S-HPETE from arachidonic acid at high conversions. Therefore, this study contributes to the preparation of biologically active oxylipins from renewable fatty acids in a sustainable way.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"31 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transparent, Fluorophore-Doped Cellulose Nanocrystal Films Prepared from Crop Residue: Superior Radiative Cooler and Organic Photodetector

IF 8.4 1区化学

ACS Sustainable Chemistry & Engineering Pub Date : 2024-12-20 DOI: 10.1021/acssuschemeng.4c08984

Utsav Mishra, Md. Arman Ansari, Akash Chaurasiya, Abhishek Kumar Singh, Debashis Panda

{"title":"Transparent, Fluorophore-Doped Cellulose Nanocrystal Films Prepared from Crop Residue: Superior Radiative Cooler and Organic Photodetector","authors":"Utsav Mishra, Md. Arman Ansari, Akash Chaurasiya, Abhishek Kumar Singh, Debashis Panda","doi":"10.1021/acssuschemeng.4c08984","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c08984","url":null,"abstract":"Carbon-neutral nanomaterials derived from lignocellulosic biomass remain the most preferred choice for lowering down the fossil-fuel-based energy consumption for indoor cooling and metal mining purposes. In this work, the synthetic methodologies for yielding a transparent, conducting cellulose nanocrystal (CNC) film from a highly abundant crop residue, rice straw (Oryza sp. Stems), have been presented. The self-assembly of CNC generates a predominant structural green color. Even the encapsulation of organic fluorophores in CNC films retains a chiral nematic order and a photonic band gap. The highly crystalline nature of the hydroxyl groups present in CNC regulates the excited-state dynamics of Rhodamine B encapsulated in the film. Nevertheless, the transreflective property of the CNC film has been demonstrated owing to its low solar light absorption and high mid-infrared (MIR) emissivity at the atmospheric transmission window (8–13 μm). The CNC film can bring down the temperature of the insulated box by ∼6 °C kept under solar simulator illumination, suggesting an effective radiative cooler. Further, the amine functionalization of CNC has resulted in a remarkable increase in current and mobility, improving the film’s conductivity by several folds. The photoresponsivity of the RhB-encapsulated-amine-functionalized CNC photodetector shows a peak response of ∼6.3 mA/W at ∼665 nm under zero bias. The external quantum efficiency of fabricated devices is about 1%. The CNC derived from the crop residue has multidimensional applications ranging from passive cooling to organic electronics.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"23 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0