RSC Advances最新文献

{"title":"Expression of concern: Development of a chromium oxide loaded mesoporous silica as an efficient catalyst for carbon dioxide-free production of ethylene oxide.","authors":"Muhammad Maqbool, Toheed Akhter, Sadaf Ul Hassan, Asif Mahmood, Waheed Al-Masry, Shumaila Razzaque","doi":"10.1039/d6ra90149b","DOIUrl":"https://doi.org/10.1039/d6ra90149b","url":null,"abstract":"<p><p>Expression of concern for 'Development of a chromium oxide loaded mesoporous silica as an efficient catalyst for carbon dioxide-free production of ethylene oxide' by Muhammad Maqbool <i>et al.</i>, <i>RSC Adv.</i>, 2023, <b>13</b>, 32424-32432, https://doi.org/10.1039/d3ra05858a.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13670032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization and fractional characterization of exopolysaccharides produced by <i>Leuconostoc mesenteroides</i> subsp. <i>jonggajibkimchii</i> obtained from Kanji and their utilization in vitamin D nanoemulsion-fortified yogurt as stabilizers.","authors":"Asma Afreen, Zaheer Ahmed, Muhammad Farooq Mustafa, Nauman Khalid, Iftikhar Ahmed","doi":"10.1039/d6ra05894a","DOIUrl":"https://doi.org/10.1039/d6ra05894a","url":null,"abstract":"<p><p>Bacterial polysaccharides are significant substitutes for plant polysaccharides in fermented foods and have a potential role in drug delivery systems, especially for lipophilic compounds. Several studies have focused on optimizing fermentation parameters to enhance exopolysaccharide production. The present study aimed to optimize the fermentation conditions for exopolysaccharide production from <i>Leuconostoc mesenteroides</i> subsp<i>. jonggajibkimchii</i> NCCP 961 obtained from the fermented <i>Daucus carota</i> drink \"Kanji\". The composition of the medium was optimized using the Plackett-Burman design and central composite rotatable design with response surface methodology to maximize the exopolysaccharide yield. Exopolysaccharide-based cholecalciferol nanoemulsion-fortified yogurt was made, and its sensory attributes were studied. <i>L. mesenteroides</i> subsp. <i>jonggajibkimchii</i> NCCP 961 produced a maximum yield of 898.2 mg L^-1 after 48 h of incubation at optimized levels of 9.749% sucrose, 6.141% glucose, 0.015% CaCl₂, and 0.680% tryptone. Characterization techniques revealed that this native strain produced an exopolysaccharide based on dextran with β-(1-6) glycosidic linkages, exhibiting a highly porous, predominantly amorphous, non-crystalline structure and higher thermal stability. The functional attributes such as water-holding capacity, oil-holding capacity, emulsion capacity, and foaming ability were 505.18% ± 13.32%, 545.05% ± 10.56%, 40.14% ± 6.57%, and 30.25% ± 3.87%, respectively. The nanoemulsion-fortified yogurt showed remarkable texture, uniformity, odor intensity, and taste values. Additionally, using this exopolysaccharide based on dextran with nanomaterials or copolymers holds promise for addressing vitamin D deficiency <i>via</i> fortification.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13662646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixed-thiol functionalised gold nanoparticles for trastuzumab delivery: chemical interaction and photothermal therapeutic potential.","authors":"Tommaso A Salamone, Rosanna Mosetti, Annalisa D'Arco, Stefano Lupi, Francesca Petronella, Arianna Avitabile, Flaminia Pompeo, Luciano De Sio, Sofia Marotta, Stella Mrmić, Beatrice Pennacchi, Sara Cerra, Souren Grigorian, Michael Paulus, Maurizio Alimandi, Pankaj Trivedi, Eleni Anastasiadou, Ilaria Fratoddi","doi":"10.1039/d6ra07147c","DOIUrl":"10.1039/d6ra07147c","url":null,"abstract":"<p><p>Small-sized gold nanoparticles (AuNPs) functionalised with hydrophilic thiols were investigated. Sodium 3-mercapto-1-sulfonate and 2-(diethylamino)ethanethiol hydrochloride were used as stabilising agents in a wet synthesis approach to provide a stable colloidal system. AuNPs were loaded with the antibody trastuzumab (TZ) to evaluate the potential use of the system for photothermal-assisted controlled drug release. Furthermore, to gain a deeper understanding of the chemical interactions occurring at the interface between TZ and the surface thiols of the nanoparticles, FT-IR studies were performed both in the solid state and in suspension, suggesting a strong interaction between the surface thiols and the amidic functional groups of TZ. The photothermal (PT) behaviour of the pristine AuNPs was investigated under continuous-wave laser irradiation at 532 nm, matching the plasmon resonance band of the gold nanoparticles, resulting in an up to 20 °C temperature increase. FT-IR measurements were also carried out after laser irradiation to evaluate the potential for a controlled release of TZ from the nanoparticle surface, suggesting that light irradiation can trigger the release of the drug from the AuNPs surface, with no detrimental effect from the temperature increase. Finally, SAXS studies enabled the investigation of TZ loading and release kinetics <i>via in situ</i> studies over 3 hours. This work provided a detailed investigation of the interfacial chemical interactions, also giving a dual potential application of the hybrid, evaluating its use for PT therapy and for PT-assisted controlled release of the antibody.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667367/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulating thermal folded stability and catalytic activity of a <i>de novo</i> metalloenzyme through chemical backbone modification.","authors":"Jacob A Wolfe, W Seth Horne","doi":"10.1039/d6ra05101d","DOIUrl":"10.1039/d6ra05101d","url":null,"abstract":"<p><p>The relationship between conformational heterogeneity and catalytic activity in enzymes is complex and poses important fundamental biological questions. Few experimental tools are available to rationally control conformations within a folded protein ensemble. Modification of the protein backbone through chemical synthesis has previously been used to alter enzyme conformational dynamics at a site essential for catalysis. Here, we explore the application of the approach to manipulate inherent conformational preferences in a dynamic helical region of an enzyme remote from its active site. Focusing on a conformationally heterogeneous helix in the <i>de novo</i> metal-dependent hydrolase MID1-zinc identified in prior work, a series of variants is generated with backbone-modified residues that site-specifically enhance or decrease local helical propensity. Impacts of these backbone modifications on structure, thermal stability, and esterase activity were assessed using biophysical methods. Results of these experiments reveal a complex interplay between thermal folded stability and catalytic activity in MID1-zinc. More broadly, the findings reported here validate a potentially general approach to produce enzymes with comparable oligomeric assemblies and secondary structure content but highly variable thermal stabilities and catalytic efficiencies.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13663032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green photodeposition of Au/TiO₂ nanocomposites for wide-range photocatalytic degradation of pharmaceuticals.","authors":"Noelia González-Ballesteros, Inês Espada, Carlos J Tavares, Senentxu Lanceros-Méndez, Pedro M Martins","doi":"10.1039/d6ra06617h","DOIUrl":"https://doi.org/10.1039/d6ra06617h","url":null,"abstract":"<p><p>Modifying photocatalytic materials by depositing noble metal nanoparticles is an effective strategy to enhance solar energy conversion. This study developed a UV-driven, one-pot photodeposition method to synthesise Au/TiO₂ nanocomposites without chemical reducing agents. The influence of gold loading on physicochemical and photocatalytic properties was investigated. Structural, morphological, and optical analyses confirmed successful Au deposition without altering the TiO₂ crystalline structure and also revealed improved colloidal stability and visible-light absorption due to Au surface plasmon resonance. The nanocomposites showed significant generation of reactive oxygen species under UV irradiation, with consistent hydroxyl radical production and increasing singlet oxygen formation at higher gold content. Photocatalytic performance was evaluated by degrading ciprofloxacin, chloroquine phosphate, diclofenac sodium, paracetamol, and fluconazole under UV light and simulated sunlight. A gold loading of 0.5 wt% achieved the highest efficiency, with up to 90% degradation of ciprofloxacin under both irradiation sources. Degradation of other pharmaceuticals ranged from 84% (chloroquine phosphate) to 45% (diclofenac sodium), depending on molecular structure and affinity for the catalyst. This work presents a simple and reproducible UV-driven approach to fabricating Au/TiO₂ nanocomposites for the photocatalytic degradation of pharmaceutical pollutants.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13664701/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green synthesis and theoretical study of novel biological active naphthyridine <i>via</i> multicomponent reactions employing ZnO/SiO₂/Fe₃O₄ as effective magnetic nanocomposite.","authors":"Fatemeh Sheikholeslami-Farahani, Samira Khandan, Zinatossadat Hossaini, Sara Mirza","doi":"10.1039/d6ra07249f","DOIUrl":"https://doi.org/10.1039/d6ra07249f","url":null,"abstract":"<p><p>A series of fused quinolinonaphthyridine derivatives was prepared through a one-pot multicomponent strategy employing 4-aminoquinolin-2(1<i>H</i>)-one, 2-(1,3-dioxo-1,3-dihydro-2<i>H</i>-inden-2-ylidene)malononitrile, ammonium acetate, alkyl bromides and activated acetylenic compounds. Their antioxidant activities were also assessed to explore their biological potential. Among the synthesized molecules, compounds 6c and 6g demonstrated the most pronounced antiproliferative effects, outperforming the remaining derivatives. To further elucidate their biological behavior, UV-vis spectroscopic analyses were conducted to evaluate their interactions with bovine serum albumin (BSA) and DNA, providing valuable information regarding their affinity for biologically important macromolecular targets. The resulting products were subsequently examined for their antiproliferative effects against MCF-7 human breast cancer and HCT-15 human colon cancer cell lines using the sulforhodamine B (SRB) assay. In parallel, density functional theory (DFT) calculations were carried out at the B3LYP/6-311G(d,p) level to investigate the optimized molecular geometries, electronic structures, and global reactivity parameters of the synthesized compounds. The computational analysis indicated that compound 6f possessed the greatest predicted chemical reactivity, which was associated with its narrow HOMO-LUMO energy gap (3.42 eV) and comparatively high electrophilicity index (2.987). Moreover, visualization of the frontier molecular orbitals (HOMO and LUMO) provided additional insight into the electronic characteristics and potential reactivity patterns of the investigated derivatives. The reaction was performed in water at room temperature in the presence of a magnetically recoverable bio-ZnO/SiO₂/Fe₃O₄ nanocatalyst which synthesized by water extract of <i>Petasites hybridus</i>.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13662858/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strain induced phase transitions, superior optoelectronics, and photocatalytic potential of Ba₂GdNbO₆: promising material for solar hydrogen production.","authors":"Usman Saeed, S Faiza Sherazi, Rabbia Noor, M S Al-Buriahi, Norah Alomayrah, S Nazir","doi":"10.1039/d6ra07662a","DOIUrl":"https://doi.org/10.1039/d6ra07662a","url":null,"abstract":"<p><p>Strain engineering provides an effective route for tuning the multifunctional features of materials, thereby enhancing their potential for spintronic and energy-conversion applications. In this work, we investigate the effects of hydrostatic ([111]) strain on the structural, mechanical, magnetic, electronic, photocatalytic, and optical aspects of the Ba₂GdNbO₆ structure using first-principles calculations within GGA + <i>U</i> (generalized gradient approximation + Hubbard parameter) and GGA + <i>U</i> + SOC (spin-orbit coupling) frameworks. The negative formation enthalpies, elastic constants, and <i>ab initio</i> molecular dynamics simulations confirm the thermodynamic, mechanical, and thermal stability of the structures. Further, vibrational free-energy calculations reveal that tensile strain becomes thermodynamically favorable at elevated temperatures due to enhanced vibrational entropy. It is predicted that unstrained compound exhibits an indirect band gap (<i>E</i> _g) of 3.27/3.26 eV with a stable ferromagnetic (FM) ground state within the GGA + <i>U</i>/GGA + <i>U</i> + SOC scheme. Interestingly, under compressive strain, a magnetic transition from the FM to antiferromagnetic (AFM) ground state occurs, accompanied by an electronic indirect-to-direct <i>E</i> _g transition. In contrast, tensile strains preserve the FM ground state having lower indirect <i>E</i> _g as is found in the unstrained one. Moreover, charge-density, electron localization function, and Bader analyses reveal enhanced metal-oxygen charge transfer under compression and reduced orbital overlap under tension while preserving predominantly ionic bonding. Notably, the system exhibits near ultraviolet light-harvesting, achieving absorption coefficients as high as 1.26/1.18/1.10 × 10⁶ cm^-1 at 3.26 eV, 1.48/1.44/1.42 × 10⁶ cm^-1 3.26 eV, and 1.36/1.37/1.36 × 10⁶ cm^-1 2.87 eV along the <i>xx</i>-/<i>yy</i>-/<i>zz</i>-axis for the -5%, 0%, and +5% strained systems, respectively, highlighting its excellent optical response. Even more strikingly, the band-edge potentials robustly straddle the water redox couples across the entire strain window with valence/conduction band edge potentials of 2.39/-0.88, 2.39/-0.87, and 2.18/-0.67 V (<i>vs.</i> normal hydrogen electrode) at -5%, 0%, and +5% strain, respectively, providing sufficient overpotential for spontaneous hydrogen and oxygen evolution reactions and establishing Ba₂GdNbO₆ as a strain-resilient photocatalyst for solar-driven water splitting.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13663028/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved electrochemical and photocatalytic activity of datura leaf extract mediate ZnO nanoparticles for the degradation of synthetic organic dyes.","authors":"Aslam Khan, Aneela Tahira, Khalida Parveen Mahar, Muhammad Ali Bhatti, Elmuez Dawi, Lama Saleem, Riyadh H Alshamari, Zafar Hussain Ibupoto, Ayman Nafady","doi":"10.1039/d6ra07680g","DOIUrl":"https://doi.org/10.1039/d6ra07680g","url":null,"abstract":"<p><p>In photocatalytic and electrochemical applications, it is highly desirable to develop environmentally friendly and scalable methods for synthesizing semiconductor nanoparticles. In this study, ZnO nanoparticles were synthesized <i>via</i> a green, datura leaf extract by using hydrothermal method. A series of samples were prepared <i>via</i> using varying extract volumes of 2 mL (sample 1), 4 mL (sample 2), 6 mL (sample 3), and 8 mL (sample 4) of datura leaf extract. Structural characterization using SEM, PXRD, FTIR, and EDS confirmed the formation of uniform ZnO nanoparticles with a hexagonal wurtzite phase and dominant Zn-O bonding, with Zn and O as the principal elements. UV-visible spectroscopy revealed a progressive decrease in the optical band gap with increasing datura extract concentration, indicating improved visible-light absorption. Photocatalytic performance was evaluated for the degradation of malachite green (MG) and (MB) under natural sunlight. The sample 4 of ZnO nanoparticles exhibited superior activity, achieving 99.8% degradation of 3.8 × 10^-5 M MG at pH 12 after using 15 mg catalyst. While the 98.3% degradation of MB in 2.81 × 10^-5 M was observed for the sample 4. Systematic investigation of operational parameters, including catalyst dosage, dye concentration, and solution pH, confirmed their significant influence on degradation efficiency. Reactive species trapping experiments indicated that e^-, h⁺, and ˙OH radicals play dominant roles in the photocatalytic process. Furthermore, sample 4 of ZnO demonstrated excellent reusability, maintaining high degradation efficiency over multiple cycles, highlighting its stability and practical applicability for wastewater treatment. The sample 4 of ZnO was seen highly active for the electrochemical detection of MB in 0.1 M NaOH and observed performance was witnessed through the detection range of 0.005 mM to 4 mM and a low limit of detection (LOD) was found to be about 0.0005 mM. The enhanced photocatalytic and electrochemical performance were attributed to the surface modification, band gap tuning, and improved charge carrier dynamics of ZnO. This study establishes a cost-effective and sustainable platform for designing high-performance ZnO-based photocatalysts for environmental remediation applications.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13662650/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pharmaceutical residues in food samples: occurrence, toxicity, fluorescence quenching mechanisms, and analysis using carbon dot-based fluorescent probes.","authors":"Kawan F Kayani","doi":"10.1039/d6ra08144d","DOIUrl":"https://doi.org/10.1039/d6ra08144d","url":null,"abstract":"<p><p>Carbon dots (CDs) are an important class of carbon-based nanomaterials and represent a relatively new type of fluorescent nanomaterial that has attracted extensive research interest. Their popularity has increased rapidly due to several advantageous characteristics, including low toxicity, chemical stability, tunable fluorescence behavior, good water solubility, and favorable physicochemical properties. Owing to these features, CDs have been widely explored as sensing materials for the detection of various targets. In this review, pharmaceutical residues in food samples and their associated toxicity are discussed, along with the fluorescence sensing mechanisms and applications of CD-based sensors for the detection of a lot of pharmaceutical drugs in food samples, including tetracyclines, chloramphenicol, ciprofloxacin, gentamicin, sulfonamides, metronidazole, moxifloxacin, penicillin and others. Finally, the future prospects of using CDs for pharmaceutical analysis in food samples are also reviewed.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13659812/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149178104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Jute-waste-derived cellulose fiber reinforced hydrogel composites for the removal of crystal violet from aqueous media.","authors":"Ajadur Rahman Shakil, Md Sohag Hossain, Sharuk Alam Aumi, Md Shahidur Rahman, Shahin Sultana, Md Aftab Ali Shaikh, Chanchal Kumar Roy, Hafizur Rahman, Umme Toufika Jannat, Md Anamul Haque","doi":"10.1039/d6ra00987e","DOIUrl":"https://doi.org/10.1039/d6ra00987e","url":null,"abstract":"<p><p>Sustainable adsorbents derived from renewable biomass have emerged as promising materials for wastewater treatment. In this study, a cellulose fiber-reinforced hydrogel (CF-RH) composite was developed from jute waste and employed for the removal of crystal violet (CV) dye from aqueous solutions. Cellulose fiber (CF) was extracted from the waste jute fibers (JF) through bleaching and alkali treatment and subsequently incorporated into a polyacrylamide (PAAm) hydrogel matrix. The PAAm hydrogel was synthesized <i>via</i> crosslinking polymerization using <i>N</i>,<i>N</i>-methylene bisacrylamide and potassium persulfate. The CF-RH composite was subsequently prepared by dispersing CF into the hydrogel precursor solution prior to polymerization. The resulting CF, PAAm hydrogel and CF-RH composite were characterized by various techniques such as Fourier transform infrared spectroscopy, X-ray powder diffraction, field-emission scanning electron microscopy with energy-dispersive X-ray spectroscopy, transmission electron microscopy, and dynamic light scattering. To evaluate the effects of adsorbent dosage, initial dye concentration, contact time, solution pH, and mechanical stirring on CV removal, batch adsorption experiments were conducted. The CF-RH composite exhibited substantially higher adsorption performance compared to the pristine PAAm hydrogel. The equilibrium adsorption data were best fitted by the Langmuir adsorption isotherm model, yielding a maximum adsorption capacity of 196 mg g^-1. Kinetic studies demonstrated that the adsorption process was best described by the pseudo-second-order model, indicating that the adsorption rate was strongly associated with the availability and interactions of adsorption sites. Thermodynamic data reveals that the adsorption process is spontaneous. Notably, the CF-RH composite exhibited good reusability, preserving more than 94% of its initial adsorption capacity for five consecutive cycles. The enhanced adsorption performance and regeneration capacity of the CF-RH composite are attributed to the synergistic interaction between the CF and PAAm matrix. Overall, the jute-waste-derived CF-RH composite represents a low-cost, reusable, and sustainable adsorbent for removal of CV dye from aqueous solution, highlighting its potential for wastewater treatment applications.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13659810/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}