Mohamed Masri, Girisha K B, Abdo Hezam, Khaled Alkanad, Talal F Qahtan, Qasem A Drmosh, Kalappa Prashantha, Manjunath S H, Sanaa Mohammed Abdu Kaid, K Byrappa, Faten Masri
{"title":"Synergetic efficiency: <i>in situ</i> growth of a novel 2D/2D chemically bonded Bi<sub>2</sub>O<sub>3</sub>/Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> S-scheme heterostructure for improved photocatalytic performance and stability.","authors":"Mohamed Masri, Girisha K B, Abdo Hezam, Khaled Alkanad, Talal F Qahtan, Qasem A Drmosh, Kalappa Prashantha, Manjunath S H, Sanaa Mohammed Abdu Kaid, K Byrappa, Faten Masri","doi":"10.1039/d4na01047g","DOIUrl":"10.1039/d4na01047g","url":null,"abstract":"<p><p>Adverse reactions caused by waterborne contaminants constitute a major hazard to the environment. Controlling the pollutants released into aquatic systems through water degradation has been one of the major concerns of recent research. Bismuth-based perovskites have exhibited outstanding properties in the field of photocatalysis. Nonetheless, many proposed bismuth-based perovskites still suffer from stability problems. The present study investigated a unique bismuth-based metal-co-sharing composite of 2D Bi<sub>2</sub>O<sub>3</sub>/Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanosheet perovskite synthesized <i>via</i> a modified anti-solvent reprecipitation method. Several samples were prepared using different ratios of Bi<sub>2</sub>O<sub>3</sub> and Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>. The optimal composite sample was found to be BO/CBB 28%, where 2D stacked nanosheets of Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> showed remarkable interaction with Bi<sub>2</sub>O<sub>3</sub> due to its optimal Bi co-sharing, as displayed in the FE-SEM and HRTEM images. However, further increasing the percentage led to greater agglomeration, hindering the photocatalytic degradation efficiency. The average size and optical band gap energy of the optimal sample were 42.5 nm and 2.46 eV, respectively. The photocatalytic degradation of MB using the optimal sample reached ∼92% within 60 min with a catalyst dosage of 10 mg L<sup>-1</sup>. With an increase in catalyst concentration to 40 mg L<sup>-1</sup>, MB removal reached almost ∼96% within 60 min under visible light owing to the enhanced stability, facilitating efficient charge separation. This paper presents an improved composite with optimal ratios of 2D Bi<sub>2</sub>O<sub>3</sub>/Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanosheets that demonstrated good stability and enhanced photocatalytic performance in comparison with pure Bi<sub>2</sub>O<sub>3</sub> and Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>. This study also sheds light on the significance of metal co-sharing and the pivotal role it plays in enhancing the S-scheme charge transfer and the internal electric field between the two components.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11775581/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Shape-tailored semiconductor dot-in-rods: optimizing CdS-shell growth for enhanced chiroptical properties <i>via</i> the rationalization of the role of temperature and time.","authors":"Junjie Hao, Peizhao Liu, Ziming Zhou, Haochen Liu, Wei Chen, Peter Müller-Buschbaum, Jiaji Cheng, Kai Wang, Xiao Wei Sun, Jean-Pierre Delville, Marie-Helene Delville","doi":"10.1039/d4na01003e","DOIUrl":"10.1039/d4na01003e","url":null,"abstract":"<p><p>Colloidal chemistry provides an assortment of synthetic tools for tuning the shape of semiconductor nanocrystals. To fully exploit the shape- and structure-dependent properties of semiconductor nanorods, high-precision control on growth and design is essential. However, achieving this precision is highly challenging due to the high temperatures (>350 °C) and short reaction times (<8 minutes) often required for these reactions. In this study, we performed the first investigation on the impact of temperature and time on the CdS-shell growth of CdSe/CdS quantum rods. Our findings demonstrate that temperature plays a pivotal role in achieving ultra-thin shell dot-in-rods, which are crucial for enhancing chiroptical properties. The two-step process proposed here explains the shell growth of CdSe/CdS dot-in-rods (DRs). It involves finely-tuned isotropic shell growth in the first stage, followed by anisotropic length growth along the [0001] rod axis in the second step. This approach has two advantages: a systematic control of the shell thickness for different aspect ratios (ARs) and batch monodispersity. These DRs, with an ultra-thin CdS shell and a high AR, after modification with l/d cysteine molecules, exhibit significant enhancement of their ligand-induced chirality, with circular dichroism (CD) <i>g</i>-factor values as high as 10<sup>-3</sup>.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11777706/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuta Goto, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
{"title":"Chemical etching of silicon assisted by graphene oxide under negative electric bias.","authors":"Yuta Goto, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura","doi":"10.1039/d4na00825a","DOIUrl":"https://doi.org/10.1039/d4na00825a","url":null,"abstract":"<p><p>Chemical etching of silicon assisted by graphene oxide (GO) has been attracting attention as a new method to fabricate micro- or nano-structures. GO promotes the reduction of an oxidant, and holes are injected into silicon, resulting in the preferential dissolution of the silicon under GO. In the conventional etching method with GO, the selectivity of the etching was low due to the stain etching caused by nitric acid. We developed an etching method that applies a negative bias to the p-type silicon substrate. The silicon under GO was more selectively etched in an etchant consisting of hydrofluoric acid and nitric acid than the silicon uncovered by GO. We assume that this is attributed to the difference in hole concentration in the silicon under GO and in the bare silicon. In addition, the in-plane diffusion of holes in silicon is suppressed by this method, resulting in the formation of highly anisotropic pores. From this study, we found that GO-assisted silicon etching occurs with a similar principle to metal-assisted chemical etching. The negative-bias etching with GO has the potential to be a simple and highly anisotropic microfabrication method.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11774252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Emerging engineered nanozymes: current status and future perspectives in cancer treatments.","authors":"Jiajia Zheng, Weili Peng, Houhui Shi, Jiaqi Zhang, Qinglian Hu, Jun Chen","doi":"10.1039/d4na00924j","DOIUrl":"https://doi.org/10.1039/d4na00924j","url":null,"abstract":"<p><p>Composite nanozymes are composed of enzymes with similar or different catalytic capabilities and have higher catalytic activity than a single enzyme. In recent years, composite nanozymes have emerged as novel nanomaterial platforms for multiple applications in various research fields, where they are used to produce oxygen, consume glutathione, or produce toxic reactive oxygen species (ROS) for cancer therapy. The therapeutic approach using composite nanozymes is known as chemo-dynamic therapy (CDT). Some composite nanozymes also show special photothermal conversion effects, enabling them to be combined with pioneering cancer treatments, such as photodynamic therapy (PDT), photothermal therapy (PTT) and sonodynamic therapy (SDT), and enhance the anti-cancer effects. In this study, the classification and catalytic performances of composite nanozymes are reviewed, along with their advantages and synthesis methods. Furthermore, the applications of composite nanozymes in the treatment of cancers are emphasized, and the prospective challenges in the future are discussed.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11774201/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Komal Farooq, Maida Murtaza, Laraib Kiran, Kashf Farooq, Waqas Ali Shah, Amir Waseem
{"title":"Construction of an MXene/MIL Fe-53/ZIF-67 derived bifunctional electrocatalyst for efficient overall water splitting.","authors":"Komal Farooq, Maida Murtaza, Laraib Kiran, Kashf Farooq, Waqas Ali Shah, Amir Waseem","doi":"10.1039/d4na00936c","DOIUrl":"10.1039/d4na00936c","url":null,"abstract":"<p><p>Research on water splitting is paramount for developing low-carbon alternative energy sources. Nevertheless, creating an efficient, cost-effective, and bifunctional electrocatalyst that facilitates both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) remains an elusive goal. In this work, we report a novel hybrid nanostructured electrocatalyst by combining and pyrolyzing MXene, MIL-53(Fe), and ZIF-67. Comprehensive characterization of the synthesized nanocomposites was conducted using XRD, FESEM, TEM, EDX, and XPS. Notably, among the synthesized electrocatalysts, M3 demonstrated exceptional performance, achieving 10 mA cm<sup>-2</sup> at 237 mV and 50 mA cm<sup>-2</sup> at 292 mV for the OER, and 10 mA cm<sup>-2</sup> at 307 mV and 50 mA cm<sup>-2</sup> at 481 mV for the HER. The Tafel slope values were 64 mV dec<sup>-1</sup> for the OER and 185 mV dec<sup>-1</sup> for the HER at 10 mA cm<sup>-2</sup>. Moreover, M3 exhibited excellent stability, with negligible current density loss over 12 hours, and showed good mass activity of 57.5 and 54.6 A g<sup>-1</sup> and TOFs of 1.56 and 2.97 s<sup>-1</sup>, for the OER and HER, respectively. This study highlights the efficacy of integrating MXene (Ti<sub>3</sub>C<sub>2</sub>T <sub><i>x</i></sub> ) with MIL-53(Fe) and ZIF-67, creating a potent bifunctional OER and HER electrocatalyst. The synergistic combination enhances electrical conductivity, active site availability, and structural stability, yielding superior performance. The findings of this investigation underscore the importance of strategic design and optimization of bifunctional electrocatalysts for energy conversion applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11770592/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neela Mohan Chidambaram, Palanisamy Rajkumar, P Arul Prakash, G M Rathika, K Prabhu, Senthil Muthu Kumar Thiagamani, M Khalid Hossain, Manikandan Ayyar, Lalitha Gnanasekaran, Jinho Kim
{"title":"Fabrication of water-dispersible dye/polymer matrix-stabilized β-FeOOH (Rh-B/F127@β-FeOOH) nanoparticles: synthesis, characterization and therapeutic applications.","authors":"Neela Mohan Chidambaram, Palanisamy Rajkumar, P Arul Prakash, G M Rathika, K Prabhu, Senthil Muthu Kumar Thiagamani, M Khalid Hossain, Manikandan Ayyar, Lalitha Gnanasekaran, Jinho Kim","doi":"10.1039/d4na00595c","DOIUrl":"10.1039/d4na00595c","url":null,"abstract":"<p><p>In this study, dye/polymer matrix-stabilized β-FeOOH nanomaterials were fabricated for therapeutic applications. Rh-B/F127@β-FeOOH nanomaterials were synthesized using two different methods: co-precipitation (CoP) and hydrothermal (HT) methods. The as-synthesized nanoparticles were characterized using various spectroscopic techniques, including FT-IR, UV-Vis, PL, XRD, HR-TEM, and XPS analysis. The functional groups and optical properties were confirmed by FT-IR spectroscopy, UV-Vis and fluorescence spectroscopy. The Rh-B/F127@β-FeOOH nanomaterials exhibited both rod-like and sphere-like morphology, as confirmed by HR-TEM analysis. Unlike the nanorods, the nanospheres produced multi-colored emissions at 407, 446, 482 and 520 nm. The oxidative states and elements were confirmed by XPS spectroscopy. MTT assays were used to analyze the cytotoxicity of the nanospheres against A549 cells. The reactive oxygen species (ROS) generation and apoptotic cell death caused by the β-FeOOH nanospheres were evaluated by flow cytometry. Cell cycle analysis indicated that the treatment of nanospheres-induced S-phase cell cycle arrest in A549 cells. The synthesized nanospheres induced late-stage apoptosis in the A549 cell line, with a cell death rate of up to 30.37% at the IC<sub>50</sub> concentration. Additionally, the antioxidant activities of the synthesized nanorods showed a high scavenging activity against free radicals, as examined by different assays such as such as DPPH, RP, and FRAP. The above results suggest that the synthesized nanorods and nanospheres are promising and efficient material for therapeutic applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11758863/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Band structure and magnetism engineering of InSe monolayers through doping with IVA- and VA-group atoms: role of impurities.","authors":"Nguyen Thi Han, J Guerrero-Sanchez, D M Hoat","doi":"10.1039/d4na01013b","DOIUrl":"10.1039/d4na01013b","url":null,"abstract":"<p><p>In this work, we investigate the electronic and magnetic properties of the InSe monolayer enriched by doping with IVA-group (Si and Ge) and VA-group (P and As) atoms. Both In and Se sublattices are considered as doping sites to realize n- and p-type doping (X<sub>In</sub>@InSe and X<sub>Se</sub>@InSe systems, X = Si, Ge, P, and As), respectively. The pristine InSe monolayer is an indirect gap semiconductor with a band gap of 1.41 eV. n-Doping processes preserve the monolayer's nonmagnetic nature. IVA-group impurities lead to monolayer metallization, while a considerable band gap reduction is induced by doping with VA-group atoms. The band gap also decreases considerably when realizing p-type doping with IVA-group atoms. In contrast, monolayer magnetization is achieved by p-type doping when replacing Se atoms with P and As atoms, leading to the formation of new 2D magnetic semiconductors. In these cases, VA-group impurities mainly produce the system's magnetism. Furthermore, our calculations also provide evidence for the emergence of magnetism in the InSe monolayer through doping with pair impurities (pX@InSe systems), where Si2/Ge2 (incorporated at the Se sublattice) and P1/As1 (incorporated at the In sublattice) dopant atoms play a key role in determining the electronic and magnetic properties of respective pair-atom-doped systems. Herein, the magnetic semiconductor nature of pSi@InSe and pGe@InSe systems is confirmed, while pAs@InSe is found to be a half-metallic system. Our results suggest the usefulness of doping with IVA- and VA-group atoms that can serve as an effective strategy to functionalize the InSe monolayer, providing insights into the role of impurities.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11756556/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Attia, Yael Levi-Kalisman, Ronit Bitton, Rachel Yerushalmi-Rozen
{"title":"Gum Arabic induced assembly of cellulose nanocrystals in aqueous media.","authors":"David Attia, Yael Levi-Kalisman, Ronit Bitton, Rachel Yerushalmi-Rozen","doi":"10.1039/d4na00981a","DOIUrl":"10.1039/d4na00981a","url":null,"abstract":"<p><p>Entropy-driven assembly of nematic liquid-crystal phases of cellulose nanocrystals (SCNCs) in aqueous suspensions results in the emergence of a cholesteric liquid crystalline phase (N* phase). We report that a solvated, non-adsorbing, highly branched natural polysaccharide, Gum Arabic (GA), strongly affects the assembly of the SCNCs and modifies the phase diagram: GA leads to significant crowding of the SCNC rods and induces a new liquid-liquid phase transition, where SCNC-rich and GA-rich droplets coexist. The solvated GA does not induce coagulation or gelation of the suspended SCNCs (at low concentrations of 1-3 wt% of GA). In the SCNC-rich droplets, finite-sized nematic nano-islands assemble and further evolve into cholesteric tactoids and nucleate the formation of the N* phase at significantly lower concentration (about 1.5 wt%) than in GA-free suspensions. We observe that the inter-particle distance and the chiral pitch of the N* phase are determined by the concentration of GA (for a given SCNC concentration). The resulting mesophases are characterized <i>via</i> transmission electron microscopy at cryogenic temperatures (cryo-TEM), small-angle X-ray scattering (SAXS), and polarized optical microscopy (POM). Our findings indicate that GA can be used to tune the phase diagram and optical properties of SCNC suspensions, and overcome kinetic barriers that lead to gelation or kinetic arrest.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11775582/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143066778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improving the aqueous solubility and antibacterial activity of triclosan using re-dispersible emulsion powder stabilized with gold nanoparticles.","authors":"Arathy J Nair, Dakrong Pissuwan","doi":"10.1039/d4na01022a","DOIUrl":"10.1039/d4na01022a","url":null,"abstract":"<p><p>Triclosan (TCS) is used as an antibacterial agent in various products. One of the major issues associated with TCS is its limited solubility in aqueous media, which can reduce its effectiveness against bacteria. In this study, we enhanced the aqueous solubility and antibacterial activity of TCS by using a re-dispersible emulsion powder stabilized with gold nanoparticles (GNPs). The developed formulation (TCS/PEG-B/GNPs) demonstrated the ability to dissolve in aqueous media and provided good stability. An antibacterial investigation was conducted using drug-resistant bacterial strains, <i>Escherichia coli</i> (<i>E. coli</i>) BAA-1161 and methicillin-resistant <i>Staphylococcus aureus</i> (MRSA), as model bacteria. The results showed that TCS/PEG-B/GNPs had the highest antibacterial activity. The MRSA strain demonstrated greater susceptibility to TCS (both TCS alone and TCS in the formulation) than <i>E. coli</i> BAA-1161. The cytotoxicity assay was also conducted in THP-1 cells and it was found that the viability of THP-1 cells treated with a 5× dilution of TCS/PEG-B/GNPs was higher than 80%. Altogether, our study proposes a novel approach to overcome the solubility concerns of TCS. These results demonstrated an increase in TCS's solubility and efficacy, which holds great promise for future applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11750016/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143024061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Magnetic resorcinol-formaldehyde supported isatin-Schiff-base/Fe as a green and reusable nanocatalyst for the synthesis of pyrano[2,3-<i>d</i>]pyrimidines.","authors":"Fatemeh Kiani, Dawood Elhamifar, Shiva Kargar","doi":"10.1039/d4na00775a","DOIUrl":"10.1039/d4na00775a","url":null,"abstract":"<p><p>Herein, a novel magnetic resorcinol-formaldehyde-supported isatin-Schiff-base/Fe complex (Fe<sub>3</sub>O<sub>4</sub>@RF-ISB/Fe) is prepared and characterized and its catalytic performance is investigated in the synthesis of pyrano[2,3-<i>d</i>]pyrimidines. The Fe<sub>3</sub>O<sub>4</sub>@RF-ISB nanomaterial was prepared through the chemical immobilization of (3-aminopropyl)trimethoxysilane over the Fe<sub>3</sub>O<sub>4</sub>@RF composite, followed by treatment with isatin. The Fe<sub>3</sub>O<sub>4</sub>@RF-ISB was then reacted with FeCl<sub>3</sub>·6H<sub>2</sub>O to afford the Fe<sub>3</sub>O<sub>4</sub>@RF-ISB/Fe nanocatalyst. Characterization through FT-IR, EDX, PXRD, VSM, SEM and ICP techniques confirmed that the magnetite surface was successfully modified with RF/ISB-Fe while preserving its crystalline structure. The SEM image revealed spherical particles with an average size of 44 nm for the designed nanocomposite. Various aromatic aldehydes were used as substrates in the presence of 0.01 g of Fe<sub>3</sub>O<sub>4</sub>@RF-ISB/Fe to give the corresponding pyranopyrimidines in high yields (88-95%) within short reaction times (30-55 minutes) at RT. The designed magnetic catalyst maintained its activity for nine runs.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11770588/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143059640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}