Next Nanotechnology最新文献

{"title":"Photoelectrochemical CO2 reduction on CuO-Cu2O nanocomposites with noble metal co-catalysts enhances the production of C1 oxygenates and acetate","authors":"Tahereh Mokary Yazdely,&nbsp;Ricard Garcia-Valls,&nbsp;Alberto Puga","doi":"10.1016/j.nxnano.2024.100125","DOIUrl":"10.1016/j.nxnano.2024.100125","url":null,"abstract":"<div><div>Multi-junction copper oxide nanocomposite photocathodes formed by CuO nanowire arrays coated with Cu₂O nanopyramids or stacked nanoprisms, <em>i.e.</em> CuO(NWA)|Cu₂O(NPy), exhibit remarkable electrochemical stability toward reductive corrosion. Whilst bare CuO nanowires are extremely prone to decomposition even at the mildest potentials applied, the core@shell morphology of CuO(NWA)|Cu₂O(NPy) resists cathodic potentials up to −0.7 V (<em>vs</em>. AgCl/Ag). Precisely controlled electrodeposition of silver or gold nanoparticles resulted in Ag nanotrails arranged on flatter surface regions in CuO(NWA)|Cu₂O(NPy)|Ag, whereas Au nanoaggregates were deposited on both flat areas and prominent apexes in CuO(NWA)|Cu₂O(NPy)|Au. Photocurrent measurements demonstrated redox process activation, namely above three-fold current density increases, by light for CuO(NWA)|Cu₂O(NPy). The participation of CO₂ in them was also confirmed by around 70 % photocurrent increases (higher than 0.2 mA cm⁻²) and by sensibly milder cathodic potential onsets (≤ −0.4 V), as recorded by linear sweep voltammetry. Photoelectrochemical CO₂ reduction experiments under simulated sunlight yielded oxygenated products in the liquid phase, chiefly formate, although acetate was also consistently produced, especially in the presence of noble metal co-catalysts. Specifically, acetate yields increased by 30–40 % for CuO(NWA)|Cu₂O(NPy)|Ag and CuO(NWA)|Cu₂O(NPy)|Au up to 56 and 54 μM, respectively. Methanol could be also formed under specific conditions. A mechanistic proposal is postulated to account for all stability and selectivity phenomena observed.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100125"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146333","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":"Effects of micellar media on the bioavailability, solubility, and stability of curcumin","authors":"Jamsheera Anjudikkal ,&nbsp;Alok Shukla ,&nbsp;Ajmal Koya Pulikkal","doi":"10.1016/j.nxnano.2024.100124","DOIUrl":"10.1016/j.nxnano.2024.100124","url":null,"abstract":"<div><div>Curcumin (CUR), a polyphenolic pigment of turmeric, -possess biological and medicinal properties. Regardless of having a wide range of therapeutic applications, CUR’s poor bioavailability, owing to its meagre solubility and stability, limits its application from being used as a promising drug. Several surfactants (nonionic, anionic, and cationic) have been tried to overcome the limitations of CUR. Studies suggest that the incorporation of CUR in micellar media plays a significant role in improving the solubility and stability of CUR. The choice of surfactant depends on the critical micelle concentration and the degree to which the CUR partitions into the micelles. Further, CUR-surfactant interactions can be brought about by various techniques, viz., microencapsulation, solid dispersion, and nanoemulsions. This article focuses on the influence of the micellar media on the stability, solubility, and bioavailability of CUR, along with the different methodologies used to prepare CUR-surfactant systems. Moreover, the medicinal applications of CUR-loaded surfactant systems are also briefly discussed.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100124"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146334","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 liposomal encapsulation and enhanced cytotoxicity of selenium nanoparticles against lung cancer cells","authors":"Dipti Chirakara ,&nbsp;Shriya Lotlikar ,&nbsp;Mahalakshmi Nannan ,&nbsp;Nageswara Rao Dunna ,&nbsp;Sivaramakrishnan Venkatabalasubramanian","doi":"10.1016/j.nxnano.2024.100121","DOIUrl":"10.1016/j.nxnano.2024.100121","url":null,"abstract":"<div><div>Lung cancer is unequivocally the most common cause of cancer-related deaths, surpassing all other types of cancer in terms of mortality rates among both men and women. Although surgery, chemotherapy, and radiation therapy are common treatments, they carry significant risks to healthy cells. The versatile benefits of using lipid-based nanocarrier systems in healthcare, combined with the therapeutic and supportive properties of micronutrients like selenium, have led to the investigation of encapsulating selenium nanoparticles in liposomes (Lip-SeNPs) as a new therapeutic strategy. Using scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDS), dynamic light scattering (DLS), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), the characterisation and stability of the Lip-SeNPs were compared with liposome-free SeNPs. This was followed by their cytotoxicity evaluation against lung cancer cells. The DLS results showed that the synthesised liposome-free SeNPs and Lip-SeNPs were spherical, with size distribution of around 151.2 and 163 nm. The zeta potential values were determined for Lip-SeNPs (-15.7 mV) compared to liposome-free SeNPs (-5.71 mV). FTIR analysis of SeNPs and Lip-SeNPs confirmed valuable information about their surface chemistry and potential structure functionalisation avenues. The augmented results obtained from DLS (homogenous size distribution), Zeta potential (higher negative charge), XRD (no other element interference), and SEM-EDS (53 % selenium encapsulation and negligible agglomeration) further strengthened the stability of the generated Lip-SeNPs compared to liposome-free SeNPs. Furthermore, 74.62 % of the SeNP encapsulation efficiency in liposomes was achieved in this study. In addition, dialysis membrane-based drug release profile studies revealed augmented acidic pH-responsive release profiles of Lip-SeNPs, suggesting a superior bioavailability for drug delivery against lung cancer cells.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100121"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146335","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":"Viscous heating of hybridized hydromagnetic MWCNTs-Fe3O4/water nanomaterial in a moving disk with non-uniform thermal model","authors":"S.O. Salawu ,&nbsp;T.A. Yusuf ,&nbsp;E.O. Fatunmbi ,&nbsp;A.M. Obalalu","doi":"10.1016/j.nxnano.2024.100123","DOIUrl":"10.1016/j.nxnano.2024.100123","url":null,"abstract":"<div><div>The potential usefulness of hybrid nanofluid in biotechnology, medicine, heat exchangers, thermal enhancement, and others is steadily increasing. Meanwhile, the efficiency of nanofluid depends on the based fluid, nanoparticle size and type, and other entrenched dynamical fluid properties. Thus, this research examines the viscous heating of hybridized hydromagnetic MWCNTs-Fe<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>/water (Multi-walled carbon nanotubes-Iron III oxide/water) of nanofluid in a moving disk with a non-uniform thermal model. For the theoretical analysis, 75% of H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O, 20% of Fe<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and 5% of MWCNTs are considered with shape factors <span><math><mrow><msub><mrow><mi>n</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>=</mo><msub><mrow><mi>n</mi></mrow><mrow><mn>2</mn></mrow></msub><mo>=</mo><mn>3</mn><mo>.</mo><mn>0</mn></mrow></math></span>. The Fe<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> and MWCNTs hybridized nanoparticles in water-solvent give a promising approach to augment heat conductivity and magneto-nanofluid properties for advanced thermal distribution systems. A spatial temperature variation of a non-uniform thermal model is assumed to simulate practical phenomena. A similarity transformation of the governing model is done and solved by coupling a numerical shooting technique with a Runge–Kutta scheme. The tabulated and graphically presented results reveal that the thermal propagation rate is improved by 21.34% as 0.25 volume of NWCNTs-Fe<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> nanoparticle is distributed in 0.5 volume of H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O solvent. Hence, the outcomes of this research provide noteworthy insights into the maximization and designing of thermal transport systems contributing to the advancement of thermal management efficiency.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100123"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146337","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":"siRNA therapeutics for effective management of rheumatoid arthritis","authors":"Vishakha R. Chakole ,&nbsp;Tathagata Dutta ,&nbsp;Priyankar Sen","doi":"10.1016/j.nxnano.2025.100135","DOIUrl":"10.1016/j.nxnano.2025.100135","url":null,"abstract":"<div><div>siRNA is a specialized type of RNA that precisely targets a mRNA, and effectively silences the respective genes. This property makes siRNA a valuable tool for developing RNAi therapeutics, particularly for managing conditions like osteoporosis, cancer, genetic disorders, and autoimmune disorders. Rheumatoid arthritis (RA) is a significant autoimmune disorder. Several treatments are available for RA, including analgesics, corticosteroids, DMARDs, biological agents, combinational therapy, epigenetic and cell therapies which play a crucial role in preventing joint function deterioration, inflammation, synovial edema, etc. Besides these numerous advantages, these treatments have several disadvantages like liver cirrhosis, interstitial lung disease, sexual health is impaired in males, neuropsychiatric adverse effects, etc. All these disadvantages engender the need for new therapy. siRNA delivery carriers like liposomes, polymeric nanoparticles, and siRNA polymer bio-conjugates are proving to be particularly effective with less toxicity compared to the traditional treatments. A promising addition to these carriers is wrapsome (WS), which can be used as a favorable carrier for delivery of siRNA to its specific sites, such as inflamed joints or the inflamed synovium. The incorporation of PEG liposomes in the delivery strategy allows WS to evade recognition by the RES, leading to an extended half-life. This extended half-life enables a sustained, slow release of the drug, contributing to superior recovery from pain and inflammation associated with conditions like RA.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100135"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146412","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":"Novel green synthesis of silver nanoparticles from empty fruit bunch waste: Biomedical applications and mechanistic insights","authors":"Bashirat Olamide Yusuf-Salihu ,&nbsp;Shakirat Afodun Abdulmumini ,&nbsp;Toheeb Taiye Bajepade ,&nbsp;Halimah Adekunbi Durosinmi ,&nbsp;Muinat Olanike Kazeem ,&nbsp;Victoria Atinuke Ajayi ,&nbsp;Agbaje Lateef","doi":"10.1016/j.nxnano.2025.100136","DOIUrl":"10.1016/j.nxnano.2025.100136","url":null,"abstract":"<div><div>Agricultural waste, such as empty fruit bunches (EFB) from palm oil production, poses environmental and health risks if not effectively managed. This study addresses this issue by innovatively transforming EFB biomass into high-value silver nanoparticles (AgNPs) via a green synthesis approach, marking the first successful biosynthesis of AgNPs from EFB. UV-Vis, FTIR, TEM, SAED, and EDX studies were used to characterize biosynthesized EFB-AgNPs. Biosynthesized EFB-AgNPs were tested for antibacterial, antioxidant, antidiabetic, anticoagulant, and thrombolytic activities. EFB-AgNPs showed a surface plasmon resonance peak at 477 nm, hydroxyl and amine group stabilization, and a silver content of 75.56 %. TEM and SAED analyses confirmed nanoscale particle diameters ranging from 12.78 nm to 19.10 nm, with a characteristic face-centered cubic (FCC) crystalline structure. EFB-AgNPs inhibited <em>Escherichia coli</em>, <em>Klebsiella oxytoca, Staphylococcus aureus</em>, <em>Proteus mirabilis</em>, and <em>Pseudomonas aeruginosa</em> dose-dependently from 40 % to 80 %, and 100 % of <em>Aspergillus niger</em>, <em>A. fumigatus,</em> and <em>A. flavus</em>. Reactive oxygen species (ROS) may cause cell membrane rupture and oxidative stress. Antioxidant testing demonstrated concentration-dependent activity across multiple assays: DPPH scavenging reached 81.49 % at 160 µg/ml, ferric-reducing activity was 90.05 % at 150 µg/ml, H₂O₂ scavenging achieved 91.00 % at 80 µg/ml, and NO scavenging reached 83.43 % at 150 µg/ml. Furthermore, EFB-AgNPs prevented blood coagulation and dissolved blood clots. In addition, EFB-AgNPs inhibited α-amylase with 74.64 % at 100 µg/ml. This unique approach of transforming EFB trash into high-value AgNPs could help sustain waste management and the circular bioeconomy by enabling medicinal applications.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100136"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146340","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":"OLED-on-silicon (OLEDoS) microdisplays: Technology challenges, design considerations, and adaptation in eXtended Reality (XR) ecosystem – Review","authors":"Rifat Kaçar ,&nbsp;Ramis Berkay Seri̇n ,&nbsp;Esin Uçar ,&nbsp;Murat Artuç ,&nbsp;Alper Ülkü ,&nbsp;Barış Kınacı","doi":"10.1016/j.nxnano.2025.100132","DOIUrl":"10.1016/j.nxnano.2025.100132","url":null,"abstract":"<div><div>Microdisplay technologies include a variety of miniature display solutions designed to specific requirements in various applications, such as near-to-eye (NTE) platforms. Among these solutions, OLED based microdisplays stands out as an advanced micro-display technology that goes beyond the core principles of conventional OLED technology. This review investigates deeply into the landscape of OLED-on-Silicon (OLEDoS) microdisplays, providing a meticulous analysis of both the CMOS backplane and the OLED frontplane technology, along with subsidiary technologies. It thoroughly examines the challenges and potential drawbacks associated with each technology, offering a comprehensive understanding of their limitations. It also sheds light on the advancements and breakthroughs in the field and highlights the design considerations to overcome the outlined limitations. OLEDs are ideal for microdisplays due to their high contrast ratios, deep blacks, and fast response times, all essential for eXtended Reality (XR) experiences. Their self-emissive nature, which eliminates the need for backlighting, enabling thin, light, power-efficient displays with vibrant colors. These features make OLEDoS microdisplays particularly well-suited for NTE platforms. The review also examines the commercial landscape of OLEDoS, covering market trends, major industry players, and the adoption of these technologies across the industry. In conclusion, it provides a forward-looking perspective on the future of OLEDoS microdisplays, outlining emerging trends and opportunities within the rapidly evolving XR ecosystem.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100132"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146411","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":"Citronella oil-loaded electro-spun single and core-shell nano fibers as sustained repellent systems against Aedes aegypti","authors":"Samali Udara Liyanaarachchi ,&nbsp;Sanjeewa K. Rodrigo ,&nbsp;Nilwala Kottegoda ,&nbsp;Veranja Karunaratne ,&nbsp;Menaka Hapugoda ,&nbsp;Tharaka Ranathunge ,&nbsp;Lahiru Udayanga ,&nbsp;Dushmantha Adikari","doi":"10.1016/j.nxnano.2024.100127","DOIUrl":"10.1016/j.nxnano.2024.100127","url":null,"abstract":"<div><div>Devising a natural and an effective repellent system is the challenge that needs to be addressed to meet the current demand among the people, despite the progress made in the mosquito control. The effort towards this goal should constitute; natural repellent, biodegradability, higher repellent loading, sustained release of the repellent. In this work, natural, biodegradable, eco-friendly and long-lasting mosquito repellent has been prepared with higher loading of citronella oil (1 %) in Polyvinyl alcohol (PVA) nanofibers. Uniaxial (CP-U) and coaxial (CP-C) nanofiber-composites were electrospun using non-toxic, biodegradable PVA at 10 % w/w and citronella oil. It was found that maintaining the outer:inner flow rate ratio at 5:2 in coaxial process is imperative to produce good fibers. Average fiber diameter of CP-U fibers was 138.5 ± 62.5 nm and for CP-C fibers it was 367.3 ± 160.1 nm. TEM analysis confirmed the core-shell structure formed in CP-C fibers by coaxial electrospinning. FTIR analysis indicated CEO incorporation in both composites and thermal analyses showed mass losses corresponding to CEO decomposition, with CP-U fibers exhibiting better thermal stability due to stronger interactions between the oil and polymer. Encapsulation efficiency and loading capacity were 20.19 % ± 0.34 and 1.83 % ± 0.03 for CP-U, and 50.25 % ± 0.32 and 14.85 % ± 0.09 for CP-C, respectively. Further, release patterns and release kinetics were studied. CP-C fibers can effectively release 94.14 % of the encapsulated oil providing an extended protection window compared to matrix encapsulation (68.75 %) after 168 hours. Release kinetics followed the Korsmeyer-Peppas model, with CP-U exhibiting Fickian diffusion (n &lt; 0.5) and CP-C showing non-Fickian diffusion (0.5 &lt;n &lt; 1). Mosquito repellent tests showed CP-C fibers were effective (85.4 ± 1.40 %) than CP-U (56.1 ± 2.79 %) and comparable to DEET (28.7 ± 4.94 %) even after 1 week. To the best of our knowledge, this is the first time neat-citronella oil has been encapsulated at the core of multi-layered nanofibers. Multi-layered encapsulation of essential oils turned out to be very effective in sustaining their repelling activity for longer periods. The outcome of this work has a high potential to be developed into an attractive-convenient product for the consumers and it can be more beneficial for infants and babies, adults with sensitive skin and school children.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146409","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":"Ultrasonic-assisted liquid phase exfoliation for high-yield monolayer graphene with enhanced crystallinity","authors":"Kaitong Sun ,&nbsp;Si Wu ,&nbsp;Junchao Xia ,&nbsp;Yinghao Zhu ,&nbsp;Guanping Xu ,&nbsp;Hai-Feng Li","doi":"10.1016/j.nxnano.2024.100131","DOIUrl":"10.1016/j.nxnano.2024.100131","url":null,"abstract":"<div><div>Graphene stands as a promising material with vast potential across energy storage, electronics, etc. Here, we present a novel mechanical approach utilizing ultrasonic high-energy intercalation exfoliation to extract monolayer graphene from graphite, offering a simple yet efficient alternative to conventional methods. Through a comprehensive series of characterizations involving atomic force microscopy, scanning electron microscopy, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, the resulting graphene nanosheets demonstrate superior crystallinity compared to those obtained via the conventional method. The high-crystalline freestanding graphene nanosheets derived from this method not only facilitate easier separation but also significantly enhance the physical performance of the original materials. This method showcases the potential for scalable production of layered materials with increased yield and crystallinity, paving the way for their utilization in various applications.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146338","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":"Efficient adsorption of mercuric ions from an aqueous medium by novel chitosan-coated silica nanoparticles based on Oman’s white sand","authors":"Laila M. Alshandoudi ,&nbsp;Asaad F. Hassan ,&nbsp;Alia Y. Al-Azri ,&nbsp;Bushra M. Al Rushaidi","doi":"10.1016/j.nxnano.2024.100130","DOIUrl":"10.1016/j.nxnano.2024.100130","url":null,"abstract":"<div><div>Two solid adsorbents were synthesized: silica nanoparticles (SNp) and chitosan coated-silica nanoparticles (CSNp) as a novel composite based on Oman’s white sand for the effective adsorption of mercuric ions (Hg^2 +) from water. Solid adsorbents were described via TGA, N₂ adsorption-desorption, X-ray diffraction analysis (XRD), zeta potential, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analysis. These techniques revealed that CSNp has a higher thermal stability with 33.6 % mass loss at 900 °C, higher specific surface area (<em>S</em>_{<em>BET</em>,} 483.2 m²/g), nearly neutral point of zero charge at pH 6.7, rich with surface chemical active groups, and 120 nm as TEM average particle size. The prepared adsorbents were utilized in the batch adsorption process to remove Hg²⁺, with varying application parameters such as adsorbent dose, initial concentration, pH, agitating time, and temperature. The results demonstrated that the CSNp composite had the highest Langmuir adsorption capacity with 497.45 mg/g. The adsorption is well described by nonlinear Langmuir adsorption isotherm (<em>R</em>^<em>2</em> &gt;0.9684, <em>χ</em>^<em>2</em> 0.1043–4<em>.</em>1389) and PSO kinetic models (<em>R</em>^<em>2</em> &gt; 0.9896 and <em>χ</em>^<em>2</em> &gt; 0.3347). The adsorption of Hg²⁺ on the synthesized solid adsorbents was found to be endothermic (<em>∆H</em>^<em>o</em>, 3.007–6.295 kJ/ mol), spontaneous (<em>∆G</em>^<em>o</em>, –6.340 to –8.250 kJ/ mol), fav^<em>o</em>rable (0 &lt;<em>K</em>_<em>L</em> &lt;1, 0.0106–0.0120), and physical adsorption process (<em>b</em>_<em>T</em> &gt; 43.318 J/mol) in nature. With only a 5 % decline in its adsorption capacity, regeneration depicted that CSNp exhibited a high reusability degree even after ten cycles of adsorption-desorption processes using EDTA as an excellent eluent for Hg²⁺ desorption.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146408","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}