Results in Chemistry最新文献

{"title":"Visible-light assisted photo-Fenton degradation of textile dye effluents using NiFe2O4/biochar nanocomposite","authors":"Hozefa Dhila, Abhishek Bhapkar, Shekhar Bhame","doi":"10.1016/j.rechem.2026.103770","DOIUrl":"10.1016/j.rechem.2026.103770","url":null,"abstract":"<div><div>The rapid growth in industrialization increases the water pollution and impacts ecosystem and human health. The increasing dye pollutants discharged from textile industrial wastewater consistently accumulated in large amount in fresh water bodies. In recent years, biochar based nanocomposites have been utilized as eco-friendly materials for remediation of dye pollutants. In the present work, biochar derived from wood residues of sawmill (WRB) was utilized as support for the fabrication of NiFe<sub>2</sub>O<sub>4</sub>/WRB nanocomposites and investigated for photo-Fenton degradation of textile dye effluents, methylene blue (MB) and Acid Red 27 (AR27). Different wt% of WRB (25%, 50% & 75%) loaded over NiFe<sub>2</sub>O<sub>4</sub> to prepare NiFe<sub>2</sub>O<sub>4</sub>/WRB nanocomposites that shows higher degradation efficiency than pure NiFe<sub>2</sub>O<sub>4</sub>. These magnetic nanocomposites (NiFe<sub>2</sub>O<sub>4</sub>/WRB) were synthesized via hydrothermal method and characterized by comprehensive analytical techniques to study the structural, morphological and optical properties. X-ray diffraction (XRD) analysis revealed the average crystallite size of 7.35 nm while Brunauer-Emmett-Teller (BET) studies confirmed a mesoporous surface with high specific surface area of 187.63 m<sup>2</sup>/g, 0.25 cm<sup>3</sup>/g pore volume, and 3.85 nm average pore diameter for NiFe<sub>2</sub>O<sub>4</sub>/WRB3. FE-SEM analysis revealed high degree of particle agglomeration, while EDX analysis confirmed the presence of Ni, Fe, and O atoms, further confirming the absence of impurity elements. FT-IR spectra examined the presence of surface functional groups and chemical interactions between NiFe<sub>2</sub>O<sub>4</sub> and WRB while Raman spectrum shows the phase purity. UV–vis spectroscopy revealed the increase in band gap with increasing wt% ratio of WRB from 1.68 eV for pure NiFe<sub>2</sub>O<sub>4</sub> to 1.94 eV for NiFe<sub>2</sub>O<sub>4</sub>/WRB3 nanocomposite. The magnetic properties of pure NiFe<sub>2</sub>O<sub>4</sub> and optimized NiFe<sub>2</sub>O<sub>4</sub>/WRB3 were investigated by Vibrating Sample Magnetometry (VSM) at room temperature confirms the magnetic nature of composite by the obtained (M-H) hysteresis loop. Under the optimized conditions, the photo-Fenton reaction against MB, AR27 and real industrial effluent (RIE) using NiFe<sub>2</sub>O<sub>4</sub>/WRB3 revealed 95% for 5 ppm MB and 91.43% for 10 ppm AR27 degradation on exposure to visible irradiation within 90 min, while 64.52% of RIE and 87.6% of mixed dyes degraded in 90 min. Various operational parameters such as catalyst loading, pH of the dye solution, initial amount of H<sub>2</sub>O<sub>2</sub> critically influenced the photo-Fenton degradation process. All degradation reactions followed first-order kinetics (R<sup>2</sup> > 0.95), and the NiFe<sub>2</sub>O<sub>4</sub>/WRB3 demonstrated excellent stability over five cycles by maintaining >80% d","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103770"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854597","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":"Magnetically recoverable WS2/SnO2/graphite/Fe3O4 nanocomposite for sonophotocatalytic degradation of cefalexin: optimization via RSM-CCD and mechanistic insights","authors":"Afsaneh Pezhhan,&nbsp;Payam Arabkhani,&nbsp;Hossein Esmaeili,&nbsp;Arash Asfaram,&nbsp;Parham Rohi Najafabadi","doi":"10.1016/j.rechem.2026.103767","DOIUrl":"10.1016/j.rechem.2026.103767","url":null,"abstract":"<div><div>The widespread occurrence of antibiotic residues in aquatic environments has increased the demand for efficient and sustainable water treatment technologies. In this study, a magnetically recoverable tungsten disulfide/tin dioxide/graphite/magnetite nanocomposite (WS₂/SnO₂ /graphite/Fe₃O₄, WSGF) was successfully synthesized and applied as a sonophotocatalyst for cefalexin degradation under simultaneous ultraviolet (UV) irradiation and ultrasonic (US) irradiation. The effects of solution pH, initial cefalexin concentration, catalyst dosage, and reaction time were optimized using response surface methodology (RSM) based on a central composite design (CCD). The results demonstrated a pronounced synergistic effect between UV irradiation, ultrasound, and WSGF nanocomposite, while the individual processes showed considerably lower degradation efficiencies. Under the optimum conditions of pH 7.0, an initial cefalexin concentration of 150 mg L⁻¹, a catalyst dosage of 40 mg, and a reaction time of 120 min, the experimental degradation efficiency of 98.43 ± 1.32 was achieved, which was in close agreement with the value predicted by the CCD-RSM model. Radical scavenging experiments identified ^•OH radicals and photogenerated holes (h⁺) as the dominant reactive species, whereas carbonate ions showed the strongest inhibitory effect because of their radical scavenging behavior. Furthermore, the magnetic Fe₃O₄ component enabled rapid catalyst recovery and repeated reuse with minimal loss of activity, while XRD analysis confirmed excellent structural stability after multiple cycles. High degradation efficiencies were also obtained in river water, hospital effluent, and municipal wastewater, demonstrating the robustness of the developed system in complex water matrices. In addition, LC-MS analysis confirmed the formation of lower-molecular-weight oxidation intermediates during cefalexin degradation. Overall, the WSGF-based sonophotocatalytic system offers an efficient, reusable, and practical approach for the treatment of antibiotic-contaminated wastewater.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103767"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854599","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":"Catalytic valorization of oriented polystyrene waste into high-grade liquid fuel: Kinetic and thermodynamic insights into an energy-efficient reaction pathway","authors":"Selpiana Selpiana,&nbsp;Dino Dewantara,&nbsp;Nina Haryani,&nbsp;Susi Susanti,&nbsp;Abidah Khairunniswah,&nbsp;Muhammad Rendana","doi":"10.1016/j.rechem.2026.103782","DOIUrl":"10.1016/j.rechem.2026.103782","url":null,"abstract":"<div><div>The growing accumulation of Oriented Polystyrene (OPS) waste necessitates efficient catalytic technologies that support resource recovery within a circular economy. This study investigates the thermal-catalytic conversion of OPS into high-grade liquid fuel using a defect spinel γ-Al₂O₃ solid acid catalyst. Isothermal cracking experiments were conducted at 350–500 °C with catalyst loadings ranging from 0 to 20 wt%, and the reaction mechanism was elucidated through solid-state kinetic modeling coupled with activated complex thermodynamic analysis.</div><div>The optimum condition (450 °C, 5 wt% γ-Al₂O₃) produced a high-quality liquid fuel with a gasoline-equivalent fraction of 73.9–75.6% and a high heating value of approximately 40.3 MJ/kg. Kinetic analysis revealed that this optimum catalyst loading fundamentally altered the rate-determining step, shifting the reaction from diffusion-controlled degradation to first-order kinetics dominated by catalytic C<img>C bond cleavage. This transition resulted in a massive surge in the apparent pre-exponential factor (<em>A</em> = 146.49 min⁻¹), which effectively offset the apparent activation energy barrier. This interplay reflects a significantly enhanced apparent molecular collision frequency, which thermodynamically yields a lower Gibbs free energy of activation (Δ<em>G</em>^‡). In contrast, excessive catalyst loadings (15–20 wt%) promoted steric hindrance and pore blockage arising from the bulky phenyl structure of OPS, restricting reactant accessibility and shifting the reaction back toward a diffusion-controlled regime. These findings demonstrate that optimizing γ-Al₂O₃ loading not only maximizes liquid fuel production but also improves the energetic efficiency of catalytic depolymerization through favorable kinetic and thermodynamic pathways. The mechanistic insights provide a scientific basis for designing energy-efficient catalytic processes for plastic waste valorization and advancing the fundamental development of low-carbon waste-to-fuel technologies.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103782"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854554","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 mechanochemical synthesis of bis-imine derivatives: Multi-target docking, MD simulations, and in silico evaluation as potential antibacterial agents","authors":"HemanthKumar Dharmapuri,&nbsp;György Marcell Tokaji,&nbsp;R. Udaya Rajesh,&nbsp;Béla Fiser,&nbsp;A. Singhal","doi":"10.1016/j.rechem.2026.103762","DOIUrl":"10.1016/j.rechem.2026.103762","url":null,"abstract":"<div><div>This study reports a green, solvent-free mechanochemical synthesis of novel bis-imine derivatives, offering a rapid and sustainable alternative to conventional thermal methods. The target compounds were obtained in 10 to 15 min via grinding, compared to 60 to 90 min under reflux. Although mechanochemical method yields (48–64%) were moderately lower than conventional yields (53–83%), the approach significantly reduces reaction time and eliminates the use of organic solvents. All the synthesized compounds were structurally characterized using ¹H NMR, ¹³C NMR, HR-MS, FT-IR, and CHN analysis. Molecular docking against four bacterial targets (DNA Gyrase, Topoisomerase IV, Dihydropteroate Synthetase, and tRNA Synthetase) identified tRNA Synthetase and DNA Gyrase as the most promising ones based on docking scores. To further validate the stability of the protein-ligand interactions, 100 ns molecular dynamics (MD) simulations were performed on all the ligands in complexed with tRNA Synthetase and DNA Gyrase using GROMACS. Additional ADMET predictions have been done to describe toxicity and pharmacological properties of the synthesized bis-imines. This work combines synthetic and computational approaches to highlight the potential of mechanochemically synthesized bis-imines to identify promising candidates that may be useful for developing new antibacterial agents against resistant bacteria.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103762"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854572","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":"Fluorescent aptasensor based on nitrogen-boron co-doped carbon nano dots (NB-CNDs) for detection of organophosphate pesticides","authors":"Sriati Wahyudi,&nbsp;Ivan Rizoputra,&nbsp;Anas,&nbsp;Camellia Panatarani,&nbsp;Ayi Bahtiar","doi":"10.1016/j.rechem.2026.103761","DOIUrl":"10.1016/j.rechem.2026.103761","url":null,"abstract":"<div><div>Organophosphate pesticides pose significant threats to human health and environmental safety, highlighting the need for rapid and sensitive detection technologies. In this study, a nitrogen–boron co-doped carbon nanodot (NB-CNDs)-based fluorescent aptasensor was developed for the detection of diazinon, malathion, and ethion. NB-CNDs were synthesized from <em>Moringa oleifera</em> leaf extract via a hydrothermal method, yielding NB-CNDs with enhanced photoluminescence properties. Diazinon and malathion aptamers served as molecular recognition elements. Owing to the structural similarity between malathion and ethion, the malathion aptamer was also employed to evaluate the fluorescence response toward ethion. Nitrogen and boron co-doping contributed to the favorable optical properties of NB-CNDs, enabling fluorescence recovery toward the target pesticides. The developed fluorescent aptasensor exhibited linear responses toward diazinon, malathion, and ethion over the concentration range of 1–100 nM, with corresponding limits of detection (LOD) of 76.76, 86.46, and 98.38 nM, respectively. Individual calibration curves were established for each pesticide. These findings demonstrate that the proposed NB-CNDs-based fluorescent aptasensor represents a simple, rapid, and effective fluorescence sensing platform for the detection of organophosphate pesticides, with promising potential for food safety monitoring and environmental analysis.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103761"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854594","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":"Eco-friendly copper oxide nanoparticles (CuO NPs) synthesized from aqueous Arachis hypogaea seed extract with enhanced antioxidant and antibacterial activities","authors":"Aderaw Anteneh Belew,&nbsp;Melesse Ababay Assege,&nbsp;Aychal Arega Belete,&nbsp;Endalew Yaze Muluneh,&nbsp;Gebru Neda Gebremariam,&nbsp;Bogale Damtew Amera,&nbsp;Adissu Getahun Adugna,&nbsp;Getu Alemayehu Legesse","doi":"10.1016/j.rechem.2026.103771","DOIUrl":"10.1016/j.rechem.2026.103771","url":null,"abstract":"<div><div>Using plant extracts for the green synthesis of metal oxide nanoparticles offers a sustainable, cost-effective, and environmentally friendly alternative to conventional chemical and physical methods. Copper oxide nanoparticles (CuO NPs) were produced in this study using the aqueous extract of <em>Arachis hypogaea</em> (peanut) seeds as a natural reducing and stabilizing agent, where the presence of flavonoids, alkaloids, phenols, tannins, and saponins was revealed in the extracts of <em>Arachis hypogaea</em> seeds. The formation, crystalline structure, morphology, and functional groups of the biosynthesized CuO NPs were verified using UV–vis spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The XRD analysis revealed a monoclinic crystal structure with an average crystallite size of approximately 23.54 nm, while SEM images indicated a quasi-spherical morphology and average size 2.27 nm. Antioxidant activity was evaluated by DPPH radical scavenging assay, which showed scavenging activity in a concentration dependent manner with IC50 value of 80.83 μg/mL (<em>Arachis hypogaea</em> extract) and 100.7 μg/mL (CuO-NPs). The antibacterial activity was evaluated against Gram-positive and Gram-negative bacterial strains using the agar well diffusion method. The synthesized CuO NPs showed significant inhibition zones, especially for <em>S. aureus, E. coli</em>, and <em>S. typhi</em>, with 22 mm, 20 mm, and 17 mm, respectively. These findings highlight the promising potential of <em>A. hypogaea</em> seed extract as an effective bioresource for the green synthesis of CuO NPs with promising antioxidant and antibacterial properties for biomedical and pharmaceutical applications.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103771"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854476","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":"Electrochemical treatment of a wet-air oxidized authentic spent caustic waste streams for safe disposal","authors":"Saleh Al-Ageel,&nbsp;Bassam Tawabini,&nbsp;Konstantinos Plakas,&nbsp;Basim Abussaud,&nbsp;Abdullah Basaleh","doi":"10.1016/j.rechem.2026.103669","DOIUrl":"10.1016/j.rechem.2026.103669","url":null,"abstract":"<div><div>Spent caustic (SC) waste streams generated by oil refineries and petrochemical plants are odorous and difficult to manage due to their high organic load. Wet-air oxidation (WAO) is commonly used to reduce COD; however, the treated effluent typically exceeds the discharge limit of 50 mg L⁻¹, requiring further treatment. This study evaluated the effectiveness of electrochemical oxidation as a cost-effective and environmentally friendly post-treatment technique to further enhance the removal of organic components from WAO-pretreated spent caustic. An authentic WAO-treated ethylene-plant spent caustic effluent was studied using an advanced electrochemical pilot system equipped with Boron Doped Diamond (BDD) and Gas Diffusion Electrodes (GDE). The effects of specific treatment parameters on process efficiency were investigated, including initial COD concentration, pH, current density, liquid flow rate, iron dosage, air flow rate, and contact time. Results showed that more than 90% COD removal was achieved at pH 4, an electric current density of 150 mA cm⁻², and a circulation rate of 0.2 m³ h⁻¹ with a treatment time of 3 h. The estimated cost of electrochemical treatment of WAO-treated spent caustic was approximately $0.96 per cubic meter. This work demonstrated that electrochemical oxidation is an efficient, cost-effective, and environmentally friendly technique for treating WAO-treated spent caustic.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103669"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854477","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":"Qingre Lidan decoction suppresses cholangiocarcinoma progression and enhances CD8+ T cell-mediated immunity by targeting the STAT3/NF-κB/PD-L1 axis","authors":"Zehan Liu,&nbsp;Xiaojun Sui,&nbsp;Jing Xun,&nbsp;Shixin Yan,&nbsp;Yuanchuan Zhang,&nbsp;Qi Zhang","doi":"10.1016/j.rechem.2026.103780","DOIUrl":"10.1016/j.rechem.2026.103780","url":null,"abstract":"<div><div><strong>Background</strong>: Cholangiocarcinoma (CCA) is a highly aggressive malignancy with limited therapeutic options and poor prognosis. Qingre Lidan Decoction (QRLD), a traditional Chinese medicine formula, has been widely used for treating hepatobiliary diseases. However, its anti-tumor efficacy and underlying mechanisms in CCA remain largely unknown.</div><div><strong>Methods:</strong> The therapeutic effects and molecular mechanisms of QRLD in CCA were investigated using a combination of network pharmacology analysis, in vitro experiments with human CCA cell lines, and in vivo studies in a mouse xenograft model. Key pathways and core targets were identified through bioinformatics.</div><div><strong>Results:</strong> Network pharmacology analysis identified 148 potential targets of QRLD in CCA, with core targets involved in cancer progression and immune regulation, such as AKT1, TP53, and TNF. Both in vitro and in vivo experiments demonstrated that QRLD significantly inhibited CCA cell proliferation and tumor growth. Mechanistic studies revealed that QRLD exerted its anti-tumor effects primarily by inducing apoptosis and inhibiting migration. Importantly, QRLD suppressed PD-L1 expression in CCA cells via downregulation of the STAT3 and NF-κB signaling pathways, and enhanced CD8⁺ T cell activation, chemotaxis, and cytotoxicity against CCA cells.</div><div><strong>Conclusions:</strong> This study provides evidence that Qingre Lidan Decoction suppresses cholangiocarcinoma progression. The anti-tumor and immunomodulatory effects are mediated through multi-target actions, including suppression of PD-L1 expression via the STAT3/NF-κB axis and enhancement of CD8⁺ T cell-mediated anti-tumor immunity. These findings support the potential of QRLD as a novel therapeutic strategy for CCA and warrant further clinical investigation.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103780"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854556","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":"Ligand-induced modulation of the Cu2+/Cu+ redox couple by β-hydroxybutyrate in aqueous solution at screen-printed electrodes","authors":"Grecia Moreno-Grijalva,&nbsp;Christian Romero-Soto,&nbsp;Valentín Miranda-Soto,&nbsp;Luis Jesús Villarreal-Gómez,&nbsp;Mercedes Teresita Oropeza-Guzmán,&nbsp;Ana L. Iglesias","doi":"10.1016/j.rechem.2026.103773","DOIUrl":"10.1016/j.rechem.2026.103773","url":null,"abstract":"<div><div>Interactions between biologically relevant ligands and metal ions in solution can modulate metal-centered electrochemical behavior and are relevant to non-enzymatic electrochemical sensing approaches. The electrochemical interaction between Cu²⁺ and β-hydroxybutyrate (3HB) was investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at bare screen-printed electrodes. In the absence of Cu²⁺, 3HB exhibited no electrochemical response under the experimental conditions, confirming its electrochemical inactivity. Upon addition of Cu²⁺, a well-defined redox process corresponding to the Cu²⁺/Cu⁺ couple was observed. The presence of 3HB resulted in a concentration-dependent increase in the anodic peak current and a positive shift in the peak potential, indicating a ligand-induced alteration in copper redox behavior.</div><div>These changes result from an interaction in solution between 3HB and Cu²⁺, likely mediated by the carboxylate group, which influences the solution-phase speciation of copper and facilitates ligand-mediated dissolution of electrodeposited copper during the anodic scan. The effect is pH-dependent, with a more pronounced response at neutral pH, consistent with increased availability of the deprotonated form of 3HB.</div><div>The results support a dynamic Cu²⁺-3HB interaction that influences the electrochemical behavior of the Cu²⁺/Cu⁺ redox couple without being dominated by a single, high-affinity coordination complex. These findings demonstrate how biologically relevant ligands can modulate copper redox behavior in solution and provide a foundation for developing non-enzymatic β-hydroxybutyrate sensing strategies.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103773"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854598","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":"Ag-decorated porous PEG-ZnO coin photocatalyst for efficient dye degradation","authors":"Reza Dadashi,&nbsp;Nima Mostafazadeh,&nbsp;Masoud Faraji,&nbsp;Sinella Sarkez Lelham,&nbsp;Morteza Bahram","doi":"10.1016/j.rechem.2026.103730","DOIUrl":"10.1016/j.rechem.2026.103730","url":null,"abstract":"<div><div>The release of dye-laden industrial effluents into natural water bodies poses a substantial ecological threat, highlighting the need for effective, affordable, and sustainable remediation technologies. In this study, a porous coin-shaped Ag/ZnO photocatalyst was successfully fabricated through a simple and low-cost approach using commercial ZnO powder, polyethylene glycol (PEG) as a porogen, and electroless Ag deposition. FESEM observations demonstrated that the material possessed a well-developed porous morphology, with Ag nanoparticles distributed homogeneously across the ZnO framework. Consistently, BET measurements indicated that silver incorporation enhanced the specific surface area of the resulting composite. XRD patterns verified the coexistence of crystalline ZnO and metallic Ag phases. The photocatalytic activity of the fabricated photocatalyst was evaluated through the degradation of methylene blue (MB) under UV irradiation. The Ag/porous ZnO-PEG photocatalyst exhibited significantly enhanced photocatalytic performance compared with bare ZnO and porous ZnO-PEG, achieving 96.8% MB degradation after 75 min of UV irradiation. The enhanced performance was attributed to the synergistic effects of PEG-induced porosity and Ag-assisted charge separation. In addition, the coin-shaped photocatalyst demonstrated good structural stability and reusability over multiple cycles. These findings demonstrate that the Ag-modified porous ZnO–PEG material has strong potential as an efficient and applicable photocatalytic platform for the remediation of contaminated wastewater.</div></div>","PeriodicalId":420,"journal":{"name":"Results in Chemistry","volume":"29 ","pages":"Article 103730"},"PeriodicalIF":5.8,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148854551","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}