ACS Sustainable Resource Management最新文献

{"title":"Policies and Regulations for Sustainable Resource Management: How Governments Play a Key Role in This International Endeavor","authors":"Say Chye Joachim Loo*,  and , Michael KC Tam, ","doi":"10.1021/acssusresmgt.4c0039410.1021/acssusresmgt.4c00394","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00394https://doi.org/10.1021/acssusresmgt.4c00394","url":null,"abstract":"","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 10","pages":"2168–2169 2168–2169"},"PeriodicalIF":0.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517166","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":"Multifunctional, Novel Zinc-Pyrrole Polymeric MOF as Free Standing, Binder Free Supercapacitor Electrode and Photocatalyst for Organic Pollutant Degradation","authors":"Kaustubh M. Kadam,&nbsp;Mahesh P. Bondarde,&nbsp;Ankita A. Kadam,&nbsp;Kshama D. Lokhande and Surajit Some*,&nbsp;","doi":"10.1021/acssusresmgt.4c0028110.1021/acssusresmgt.4c00281","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00281https://doi.org/10.1021/acssusresmgt.4c00281","url":null,"abstract":"<p >We developed a novel metal-organic framework (MOF) that incorporates a polymeric chain comprising a transition metal and a conducting polymer. It differs from traditional MOFs that rely on rigid organic linkers. Zinc ion was trapped between two pyrrole rings to form a stable complex, which was polymerized, resulting in a polymeric chain-based MOF (ZP-MOF); the conducting polymer served as a ligand. Because of its innovative structure, ZP-MOF functioned as a freestanding, binder-free electrode and exhibited a remarkable specific capacitance of 232.44 F g^–1 at a current density of 1 A g^–1, energy density of 26 Wh kg^–1, and power density of 1807 W kg^–1. The ZP-MOF delivered outstanding electrochemical performance and demonstrated exceptional cyclic stability, retaining 84% of its initial capacitance after over 5000 charge-discharge cycles at 10 A g^–1. The ZP-MOF also showed excellent potential in environmental applications such as degrading dyes, as 50 mg of it removed 98.52% of methylene blue dye from an aqueous solution (50 mL) within 40 min, even at high dye concentrations of 50 mg/L. These findings highlight the dual functionality of the as-developed ZP-MOF as an efficient energy storage material and a promising agent for dye wastewater treatment, underscoring its potential for diverse practical applications and setting new standards for MOF design.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2420–2427 2420–2427"},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736181","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":"MgO Assisted Catalytic Hydrothermal Carbonization Followed by Pyrolysis of Sunflower Stalks for the Determination of Kinetic and Thermodynamic Parameters","authors":"Ahmad Nawaz*,&nbsp; and ,&nbsp;Pradeep Kumar,&nbsp;","doi":"10.1021/acssusresmgt.4c0031110.1021/acssusresmgt.4c00311","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00311https://doi.org/10.1021/acssusresmgt.4c00311","url":null,"abstract":"<p >The current study aimed to produce hydrochar from sunflower stalks using the catalytic hydrothermal carbonization (HTC) technique and to evaluate its effectiveness in the pyrolysis process. The hydrochar was pyrolysed in a thermogravimetric analyser at three different heating rates (10, 20, and 40°C/min) for the evaluation of kinetic, thermodynamics and reaction mechanisms. Characterization methods such as Fourier transform infrared spectroscopy and X-ray diffraction were applied to examine the functional groups and phases, respectively. The isoconversional methods were applied for the estimation of kinetic parameters, which included Kissinger Akahira Sunose (KAS), Vyazovkin (VZK), and Ozawa Flynn Wall (OFW). The average activation energy obtained for the catalytic hydrochar based on the VZK method was 125.81 kJ/mol, significantly lower than those for the raw biomass and sole hydrochar pyrolysis. The <i>z(α)</i> master plot approach was applied to deduce the reaction mechanism. The use of catalytic hydrochar may reduce the total environmental effect and greenhouse gas footprint of solid fuel combustion, easing the transition to low-carbon power generation.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2461–2471 2461–2471"},"PeriodicalIF":0.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736179","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":"Fractionation of Brewer’s Spent Grain Using a Cascade Process for Carbohydrate Release and the Simultaneous Production of Protein and Fiber Fractions Targeting the Food Industry","authors":"Juan Castilla-Archilla,&nbsp;Maria Cermeño,&nbsp;Maria Tuohy,&nbsp;Richard J. FitzGerald and Piet N. L. Lens*,&nbsp;","doi":"10.1021/acssusresmgt.4c0012310.1021/acssusresmgt.4c00123","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00123https://doi.org/10.1021/acssusresmgt.4c00123","url":null,"abstract":"<p >Brewer’s spent grain (BSG) contains a large fraction of proteins, lignin, and carbohydrates. However, its heterogeneous composition limits its use in the food industry. The current work evaluated a cascade process for fractionation of these compounds. Two different thermally diluted acid pretreatments prior to enzymatic hydrolysis steps were evaluated. Condition 1 (C1) corresponded to 0.49% (v/v) HCl at 87.7 °C for 92.7 min, and C2 used 0.80% HCl at 121.0 °C for 142 min. Three different solid fractions were obtained for each condition, a fine solid (FS) (particle size &lt;25μm), a coarse solid (CS) rich in protein and fiber, and an alkaline solid (AS) rich in fiber. The fractions had water retention capacities between 4.0 and 8.8 g_H₂O/g_TS. The highest protein content was obtained for C1-FS (31.5% w/w), and the highest total fiber content for C2-AS (&gt;80%). Some of those fractions have characteristics similar to those of current market ingredients used in the food industry.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2350–2360 2350–2360"},"PeriodicalIF":0.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736178","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":"Mechanical Recycling Process: An Alternative for CF/PA6 Composite Waste from the Automotive Industry","authors":"Maria Eduarda Barbosa dos Santos,&nbsp;Guilherme Ferreira de Melo Morgado,&nbsp;Luis Felipe de Paula Santos,&nbsp;Eduardo Henrique Backes,&nbsp;Juliano Marini,&nbsp;Larissa Stieven Montagna and Fabio Roberto Passador*,&nbsp;","doi":"10.1021/acssusresmgt.4c0024510.1021/acssusresmgt.4c00245","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00245https://doi.org/10.1021/acssusresmgt.4c00245","url":null,"abstract":"<p >The amount of waste generated by the automotive industry from carbon-fiber-reinforced thermoplastic (CFRTP) has been increasing every year due to the rising demand for these materials, as they lead to weight reduction and improved vehicle performance. Carbon-fiber-reinforced polyamide 6 (CF/PA6) is a thermoplastic matrix composite utilized in this sector, typically fabricated through lamination followed by part cutting. This manufacturing process generates waste with high mechanical properties and comes at a high cost. In this work, we suggest a simple and efficient method to recycle this waste. The waste from CF/PA6 composites was cut into small squares of various sizes and dried in an oven. Laminates measuring 300 × 300 mm were then prepared by randomly arranging the waste in an aluminum mold and subjected to hot compression. Laminates with varying proportions of neat PA6 were also prepared. Standardized specimens were cut using a CNC router cutting machine following processing and subsequently inspected via ultrasound. The recycled laminates were characterized by various mechanical properties, including Charpy impact strength, three-point flexural strength, interlaminar shear strength (ILSS), and Shore D hardness. Thermal properties were evaluated through differential scanning calorimetry, thermogravimetric analysis, Vicat softening temperature (VST), and heat deflection temperature (HDT). Morphological characteristics were analyzed via fractography of specimens post-impact test using scanning electron microscopy. Visual inspection and ultrasound analysis confirmed the quality of the processed laminates. The recycled composites exhibited promising mechanical properties, with average Charpy impact values of 878 J/m, a Shore D hardness of 81, flexural strength of 310 MPa, ILSS of 33 MPa, and HDT and VST exceeding 200 °C. Fractographic analysis indicated excellent fiber–matrix interface bonding. Consequently, the feasibility of mechanical recycling of CF/PA6 composite waste, with 40 wt % neat PA6, was demonstrated as a viable solution for manufacturing new laminates suitable for secondary applications.</p><p >The mechanical recycling process of thermoplastic composites reinforced with carbon fibers is essential for minimizing environmental impact and recovering high-value-added waste.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2394–2403 2394–2403"},"PeriodicalIF":0.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssusresmgt.4c00245","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736176","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":"Exploring the Structural, Biochemical, and Functional Diversity of Glycoside Hydrolase Family 12 from Penicillium subrubescens","authors":"Peicheng Sun*,&nbsp;Mao Peng,&nbsp;Sumitha K. Reddy,&nbsp;Laurine Seelt,&nbsp;Ritesh Mewalal,&nbsp;Ian Blaby,&nbsp;Igor V. Grigoriev and Ronald P. de Vries*,&nbsp;","doi":"10.1021/acssusresmgt.4c0021810.1021/acssusresmgt.4c00218","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00218https://doi.org/10.1021/acssusresmgt.4c00218","url":null,"abstract":"<p >Glycoside hydrolases (GHs) play an essential role in plant biomass degradation and modification for the sustainable production of biochemicals. The filamentous Ascomycete fungus <i>Penicillium subrubescens</i> contains a higher number of GH12 candidates compared to related species. Therefore, we aimed to compare <i>P. subrubescens</i> GH12s for their ability and substrate specificity for plant cell wall polysaccharide degradation and species’ potential as a source of novel enzymes for plant biomass valorization. Our re-evaluated phylogenetic analysis of fungal GH12 members showed that the <i>P. subrubescens</i> GH12s were located in different (new) clades. Biochemical characterization marked <i>Ps</i>EglA as an endoglucanase and four other <i>P. subrubescens</i> GH12s (i.e., <i>Ps</i>XegA–D) as xyloglucanases. Interestingly, structural features of <i>Ps</i>XegD and <i>Ps</i>XegE were more comparable to those of Basidiomycete GH12 xyloglucanases with a unique open substrate-binding cleft. <i>Ps</i>UegA displayed dual xyloglucanase and endoglucanase activity and also showed distinct structural features. Comparative transcriptome analysis supported the functional diversity of <i>P. subrubescens</i> GH12s in plant biomass degradation. The gene encoding <i>Ps</i>UegA was expressed under diverse conditions, suggesting a scouting role for this enzyme.</p><p ><i>Penicillium subrubescens</i> GH12 enzymes obtain new and diverse structural features, product profiles, and functions, which supports the species’ potential as a source of novel enzymes for plant biomass valorization.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2372–2383 2372–2383"},"PeriodicalIF":0.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssusresmgt.4c00218","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736177","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":"Microalgae for the Extraction and Separation of Rare Earths: An STXM Study of Ce, Gd, and P","authors":"Maxence Plouviez,&nbsp;Benoit Guieysse,&nbsp;Karla Wolmarans,&nbsp;Andrea Marie E. Matinong,&nbsp;Olivia Buwalda,&nbsp;Karina Thånell,&nbsp;Igor Beinik,&nbsp;J. R. Marius Tuyishime,&nbsp;Valerie Mitchell,&nbsp;Peter Kappen,&nbsp;David Flynn,&nbsp;Thierry Jauffrais and Richard G. Haverkamp*,&nbsp;","doi":"10.1021/acssusresmgt.4c0023710.1021/acssusresmgt.4c00237","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00237https://doi.org/10.1021/acssusresmgt.4c00237","url":null,"abstract":"<p >Rare earth elements (lanthanides) are critical materials for many applications, particularly those involved in new energy. Extracting these elements economically from low-concentration sources may be challenging. This study investigates the interaction of Ce and Gd with microalgae that have been triggered to form phosphate-rich granules. Lanthanides usually occur in nature as phosphates, and therefore, we hypothesized that phosphate accumulation in microalgae may facilitate lanthanide sequestration. Synchrotron-based scanning transmission X-ray microspectroscopy (STXM) was used to map the distribution of Gd, Ce, and P in and around cells of <i>Chlamydomonas reinhardtii</i>. STXM provided X-ray absorption (XAS) spectra at the Gd M_4,5-edge, the Ce M_4,5-edge, and the P K-edge, supported by bulk X-ray absorption spectroscopy at another beamline, and elemental maps from scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS). Gd was associated with P in polyphosphate granules within <i>C. reinhardtii</i> and with P outside the cells. Ce was associated with P outside the microalgal cells but not with the P granules inside the cells. Gd and Ce were found to react with phosphate to form a distinct compound apparent in X-ray absorption near edge spectroscopy (XANES) of bulk samples. However, this compound is not found in the P granules that are coincident with Gd inside the alga. These differences in uptake by the microalga between Ce and Gd may suggest a selective extraction technique and could be generalized to other rare earth elements that are otherwise hard to separate.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 10","pages":"2225–2233 2225–2233"},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142550716","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":"Lessons from the Short-Lived 2021 Fertilizer Import Ban in Sri Lanka Based on Analysis of Nutrient Flows","authors":"Maya J. Fein-Cole,&nbsp;Mohamed Esham,&nbsp;Nilanthi Jayathilake,&nbsp;Miriam Otoo,&nbsp;Christopher Koliba,&nbsp;Gillian L. Galford,&nbsp;Katherine K. Porterfield,&nbsp;Isuru B. Wijethunga and Eric D. Roy*,&nbsp;","doi":"10.1021/acssusresmgt.4c0014910.1021/acssusresmgt.4c00149","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00149https://doi.org/10.1021/acssusresmgt.4c00149","url":null,"abstract":"<p >The Sri Lankan government’s 2021 policy to ban mineral fertilizer imports and shift to green agriculture provides an opportunity to examine the potential for nutrient recycling in a more circular economy. Here, we examined national-level nutrient flows in Sri Lanka to determine the capacity to offset mineral fertilizer with alternative nutrient sources, considering nitrogen (N) and phosphorus (P). Beyond animal manure already applied to croplands, other nutrient sources, including municipal solid waste (MSW) compost and human excreta, have limited potential to offset mineral fertilizer imports. For example, MSW compost and early adoption of nutrient recovery from human excreta could provide N and P equal to only ≤10% of mineral fertilizer use. Furthermore, we used a grid-based resource recovery and distribution model to identify priority areas for the nutrient management transition in Sri Lanka. Reuse of recovered nutrients from MSW compost and human excreta in model scenarios was in urban and peri-urban areas, including home gardens, distant from much of the nation’s agriculture. Our findings reinforce calls for long-term strategic planning for transitions in nutrient management. Future policies should consider fundamental constraints on alternative nutrient sources and emphasize increasing capacity for both effective nutrient recycling and efficient mineral fertilizer use.</p><p >This paper identifies constraints on nutrient availability influencing the outcome of Sri Lanka’s controversial 2021 mineral fertilizer ban and makes broadly applicable recommendations for future agricultural nutrient management transitions.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2361–2371 2361–2371"},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssusresmgt.4c00149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736175","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":"Self-Driven SiO2/C Nanocomposites from Cultured Diatom Microalgae for Sustainable Li-Ion Battery Anodes: The Role of Impurities","authors":"Kesavan Thangaian*,&nbsp;Anders Gaarud,&nbsp;Inger-Emma Nylund and Maria Valeria Blanco*,&nbsp;","doi":"10.1021/acssusresmgt.4c0031210.1021/acssusresmgt.4c00312","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00312https://doi.org/10.1021/acssusresmgt.4c00312","url":null,"abstract":"<p >Nanostructured SiO₂ shells from diatom microalgae are a promising feedstock for the production of high-performance SiO₂ anodes for next-generation lithium-ion batteries (LIBs), and diatom biomass has been proposed as a carbon source for producing SiO₂/C nanocomposites of improved cyclability. A standard approach before implementing diatoms as an anode material involves an acid washing step for removing minor impurities from diatom shells. In this work, we perform the first comprehensive analysis on the effect of minor chemical species present on diatom shells on the electrochemical properties of diatom-SiO₂/C anodes. Unwashed and acid-washed single species cultured diatoms containing their original biomass content were subjected to thermal treatments at 600, 700, 800, and 900 °C, and the resulting SiO₂/C composites were fully characterized by XRD, BET, TGA, Raman, SEM/EDX, and TEM techniques. The electrochemical performance of the resulting anodes reveals the key role of impurities in improving the cycling properties. While acid-washed SiO₂/C composites displayed higher surface area, their electrochemical performance was comparable to non-coated SiO₂. On the other hand, unwashed SiO₂/C anodes exhibited a specific capacity up to twice that of SiO₂. The best-performing SiO₂/C anode was the unwashed diatom-SiO₂ heat-treated at 800 °C, showing a specific capacity of 661 mAh·g^–1 after 100 cycles at a current density of 200 mA·g^–1. Results on the beneficial effects of impurities on SiO₂/C anodes are crucial for an effective implementation of diatoms in LIB technology.</p><p >Nanostructured carbon-coated SiO₂ from biomass-derived diatom microalgae are promising candidates for high-performance next-generation lithium-ion battery anodes.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 10","pages":"2284–2293 2284–2293"},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssusresmgt.4c00312","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142550646","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":"Core/Shell-Like Magnetic Structure and Optical Properties in CuO Nanoparticles Synthesized by Green Route","authors":"Latika Mishra*,&nbsp;Vinod Kumar Dwivedi*,&nbsp;Hanuma Kumar Dara,&nbsp;Vishal Kumar Chakradhary,&nbsp;Sairam Ithineni,&nbsp;Akila G. Prabhudessai and Shamshun Nehar,&nbsp;","doi":"10.1021/acssusresmgt.4c0032510.1021/acssusresmgt.4c00325","DOIUrl":"https://doi.org/10.1021/acssusresmgt.4c00325https://doi.org/10.1021/acssusresmgt.4c00325","url":null,"abstract":"<p >We report a core/shell-like magnetic structure at room temperature in nonstoichiometric CuO nanoparticles (NPs) synthesized by a green route using <i>Phyllanthus niruri</i> whole plant extract over leaf extract. The XRD pattern analyzed by Rietveld refinement confirms single phase formation of CuO NPs crystals in a monoclinic structure with space group C2/C. SEM and TEM microstructures reveal agglomeration of NPs, spherical in shape with an average particle size of 20 nm. The FTIR spectrum confirms the plant derivatives and its biomolecules and functional group associated with the CuO NPs. The core level XPS of Cu-2p and O-1s suggests the presence of oxygen vacancies and coexistence of mixed oxidation states of Cu, i.e., Cu²⁺ and Cu³⁺. UV–visible absorption spectra show enhancement in the optical band gap energy (<i>E</i>_<i>g</i> ∼ 2.9 eV) along with a strong absorption peak at wavelength ∼244 nm, which is not observed in previously reported literature [Kalarani, G.; Lekha, N. C.; Arunkumar, G. <i>Ann. Romanian Soc. Cell Biol.</i> <b>2021</b>, <i>25</i>, 12900; Hemashree, S.; Pruthvi, M. L.; Mahesh, M. K. <i>Int. J. Res. Appl. Sci. Eng. Technol.</i> <b>2023</b>, <i>11</i>, 459]. It is likely due to the surface plasmon resonance. The investigation of magnetization of CuO NPs synthesized by PN extract is entirely missing [Kalarani, G.; Lekha, N. C.; Arunkumar, G. <i>Ann. Romanian Soc. Cell Biol.</i> <b>2021</b>, <i>25</i>, 12900; Hemashree, S.; Pruthvi, M. L.; Mahesh, M. K. <i>Int. J. Res. Appl. Sci. Eng. Technol.</i> <b>2023</b>, <i>11</i>, 459]. M-H results reveal room temperature ferromagnetism at a low field (0.3 T) with a coercive field of 0.02 T along with the absence of saturation magnetization. The M-T result indicates a magnetic transition temperature beyond 350 K with a significant bifurcation between both branches of magnetic susceptibilities χ_<i>FC</i> and χ_<i>ZFC</i>. Overall results suggest a core/shell-like magnetic structure, where the inner part exhibits a strong antiferromagnetic order and the outer surface behaves like a weak disordered ferromagnet due to uncompensated surface spins. The room temperature ferromagnetic ordering is likely due to the virtual hopping of electrons from the Cu²⁺(3d⁹) site to the Cu³⁺(3d⁸) site.</p><p >Eco-friendly and sustainable approach for the synthesis of CuO nanomaterials using whole plant extract of <i>Phyllanthus niruri</i> for the study of its magnetic and optical properties.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"1 11","pages":"2472–2481 2472–2481"},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssusresmgt.4c00325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736035","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}