Nanoscale Advances最新文献

{"title":"Facet-controlled growth and soft-chemical exfoliation of two-dimensional titanium dioxide nanosheets","authors":"Christian Harito, Munawar Khalil, Leanddas Nurdiwijayanto, Ni Luh Wulan Septiani, Syauqi Abdurrahman Abrori, Budi Riza Putra, Syed Z. J. Zaidi, Takaaki Taniguchi, Brian Yuliarto and Frank C. Walsh","doi":"10.1039/D4NA00442F","DOIUrl":"10.1039/D4NA00442F","url":null,"abstract":"<p >TiO<small>₂</small> remains one of the most popular materials used in catalysts, photovoltaics, coatings, and electronics due to its abundance, chemical stability, and excellent catalytic properties. The tailoring of the TiO<small>₂</small> structure into two-dimensional nanosheets prompted the successful isolation of graphene and MXenes. In this review, facet-controlled TiO<small>₂</small> and monolayer titanate are outlined, covering their synthesis route and formation mechanism. The reactive facet of TiO<small>₂</small> is usually controlled by a capping agent. In contrast, the monolayer titanate is achieved by ion-exchange and delamination of layered titanates. Each route leads to 2D structures with unique physical and chemical properties, which expands its utilisation into several niche applications. We elaborate the detailed outlook for the future use and research studies of facet-controlled TiO<small>₂</small> and monolayer titanates. Advantages and disadvantages of both structures are provided, along with suggested applications for each type of 2D TiO<small>₂</small> nanosheets.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00442f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718641","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":"Application of MIL-101(Cr) for biofuel dehydration and process optimization using the central composite design method","authors":"Parya Parak, Ahmad Nikseresht, Masoud Mohammadi and Mohammad Saeid Emaminia","doi":"10.1039/D4NA00315B","DOIUrl":"10.1039/D4NA00315B","url":null,"abstract":"<p >Nowadays, researchers from various fields are aiming to replace petro-based and other fossil fuels with green and renewable alternatives. One of the potential candidates, requiring a highly pure reactant, is biofuel. The use of alcohol-containing water as a reactant can lead to different types of problems including the generation of side reactions, hydrolysis, equilibrium shifts, catalyst deactivation and process complexity. A metal–organic framework, MIL-101(Cr), was successfully synthesized using the hydrothermal method and subsequently employed for the dehydration of a standard biofuel. With this goal in mind, we aimed to optimize the effects of operational parameters—specifically, initial water concentration, adsorbent dosage, and temperature—using the central composite design (CCD) method, while also analyzing their behaviors by applying variance analysis. To predict the process behavior, we propose a refined quadratic equation under various conditions, achieving an <em>R</em><small>²</small> value of 95.26. The results showed that the process was more influenced by temperature variations than the other two parameters. The optimal conditions were predicted with an initial concentration of 1.41, catalyst dosage of 0.14, and a temperature of 302.5 K, resulting in a capacity of 1349.72 and a desirability value of 0.95. Additionally, the synthesized MIL-101(Cr) was characterized using XRD, SEM, DSC/TGA, and N<small>₂</small> physisorption techniques. The results indicated that the particles possessed microporous windows and mesoporous cages, exhibiting a uniform octahedral shape with an average size ranging between 200 and 500 nm.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00315b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718643","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":"Nanocomposites based on Cu2O coated silver nanowire networks for high-performance oxygen evolution reaction†","authors":"Sergio Battiato, Abderrahime Sekkat, Camilo Sanchez Velasquez, Anna Lucia Pellegrino, Daniel Bellet, Antonio Terrasi, Salvo Mirabella and David Muñoz-Rojas","doi":"10.1039/D4NA00364K","DOIUrl":"10.1039/D4NA00364K","url":null,"abstract":"<p >The development of highly active, low-cost, and robust electrocatalysts for the oxygen evolution reaction (OER) is a crucial endeavor for the clean and economically viable production of hydrogen <em>via</em> electrochemical water splitting. Herein, cuprous oxide (Cu<small>₂</small>O) thin films are deposited on silver nanowire (AgNW) networks by atmospheric-pressure spatial atomic layer deposition (AP-SALD). AgNW@Cu<small>₂</small>O nanocomposites supported on conductive copper electrodes exhibited superior OER activity as compared to bare copper substrate and bare AgNWs. Moreover, a relationship between Cu<small>₂</small>O thickness and OER activity was established. Notably, the most effective catalyst (AgNW@50nm-thick Cu<small>₂</small>O) demonstrated very high OER activity with a low overpotential of 409 mV to deliver a current density of 10 mA cm<small>⁻²</small> (<em>η</em><small>₁₀</small>), a Tafel slope of 47 mV dec<small>⁻¹</small>, a turnover frequency (TOF) of 4.2 s<small>⁻¹</small> at 350 mV, and good durability in alkaline media (1 M KOH). This highlights the potential of AgNWs as a powerful platform for the formation of highly efficient copper oxide catalysts towards OER. This work provides a foundation for the development of nanostructured Cu-based electrocatalysts for future clean energy conversion and storage systems.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00364k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718642","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":"Synergistic augmentation and fundamental mechanistic exploration of β-Ga2O3-rGO photocatalyst for efficient CO2 reduction†","authors":"Hye-In Jung, Hangyeol Choi, Yu-Jin Song, Jung Han Kim and Yohan Yoon","doi":"10.1039/D4NA00408F","DOIUrl":"10.1039/D4NA00408F","url":null,"abstract":"<p >We explore the novel photodecomposition capabilities of β-Ga<small>₂</small>O<small>₃</small> when augmented with reduced graphene oxide (rGO). Employing real-time spectroscopy, this study unveils the sophisticated mechanisms of photodecomposition, identifying an optimal 1 wt% β-Ga<small>₂</small>O<small>₃</small>-rGO ratio that substantially elevates the degradation efficiency of Methylene Blue (MB). Our findings illuminate a direct relationship between the photocatalyst's composition and its performance, with the quantity of rGO synthesis notably influencing the catalyst's morphology and consequently, its photodegradation potency. The 1 wt% β-Ga<small>₂</small>O<small>₃</small>-rGO composition stands out in its class, showing a notable 4.7-fold increase in CO production over pristine β-Ga<small>₂</small>O<small>₃</small> and achieving CO selectivity above 98%. This remarkable performance is a testament to the significant improvements rendered by our novel rGO integration technique. Such promising results highlight the potential of our custom-designed β-Ga<small>₂</small>O<small>₃</small>-rGO photocatalyst for critical environmental applications, representing a substantial leap forward in photocatalytic technology.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00408f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722230","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":"Magnetically recoverable Fe3O4@SiO2@SBA-3@2-ATP-Cu: an improved catalyst for the synthesis of 5-substituted 1H-tetrazoles†","authors":"Zahra Heidarnezhad, Arash Ghorbani-Choghamarani and Zahra Taherinia","doi":"10.1039/D4NA00414K","DOIUrl":"10.1039/D4NA00414K","url":null,"abstract":"<p >Functionalization of Fe<small>₃</small>O<small>₄</small>@SiO<small>₂</small>@SBA-3 with double-charged 3-chloropropyltrimethoxysilane (CPTMS) and 2-aminophenol, followed by mechanical mixing of the solid product with copper(<small>I</small>) chloride produces a new, greener and efficient Fe<small>₃</small>O<small>₄</small>@SiO<small>₂</small>@SBA-3@2-ATP-Cu catalyst for the synthesis of 5-substituted 1<em>H</em>-tetrazoles. XRD, SEM, atomic absorption, TGA, N<small>₂</small> adsorption–desorption, and VSM analyses were performed for the characterization of the Fe<small>₃</small>O<small>₄</small>@SiO<small>₂</small>@SBA-3@2-ATP-Cu structure. Nitrogen adsorption–desorption analysis revealed that Fe<small>₃</small>O<small>₄</small>@SiO<small>₂</small>@SBA-3@2-ATP-Cu has a surface area of 242 m<small>²</small> g<small>⁻¹</small> and a total pore volume of 55.72 cm<small>³</small> g<small>⁻¹</small>. In synthesizing 5-substituted 1<em>H</em>-tetrazoles, Fe<small>₃</small>O<small>₄</small>@SiO<small>₂</small>@SBA-3@2-ATP-Cu shows superior yields in short reaction times at 120 °C. This catalyst also showed high thermal stability and recyclability at least for 4 runs without apparent loss of efficiency.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00414k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718645","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":"Development of a magnified sunlight responsive shape memory bio-composite: effects of titanium nitride (TiN) nanoparticles on a bio-based benzoxazine/epoxy copolymer†","authors":"Anandraj Joseph, Ibrahim Lawan, Krittapas Charoensuk, Panuwat Luengrojanakul, Phattarin Mora, Cheol-Hee Ahn and Sarawut Rimdusit","doi":"10.1039/D4NA00360H","DOIUrl":"10.1039/D4NA00360H","url":null,"abstract":"<p >This study uniquely explored the effects of loading titanium nitride (TiN) nanoparticles in a bio-based benzoxazine/epoxy copolymer on the shape memory performance of the resulting composite using normal and magnified sunlight irradiation stimuli scenarios. Additionally, the effects of loading the TiN nanoparticles in the copolymer on light absorbance capacity, thermal stability, visco-elastic properties, and tensile properties of the composites were analysed. Results reveal that the different loading amounts (1 to 7 wt%) of TiN dispersed well within the copolymer matrix and produced excellent composite samples (TiN-1(wt%), TiN-3(wt%), TiN-5(wt%), and TiN-7(wt%)). Interestingly, the obtained samples were found to exhibit improved light absorbance in the wavelength range of 200–900 nm, giving the samples greater sunlight absorbing capacity. Moreover, the thermal stability of the composites increases with an increase in the loading amount; for instance, the initial degradation temperature increased from 316 °C to 324 °C. Meanwhile, visco-elastic and tensile properties increased and reached the optimum for TiN-5(wt%), where 3.1 GPa and 10.4 MPa were recorded as storage modulus and tensile stress, respectively. Consequent to these improvements in the properties of the composites, the shape memory performance of the composites was positively impacted. For instance, average shape fixity ratio, shape recovery ratio, and recovery time of 95%, 96%, and 38 seconds, respectively, were achieved with TiN-7(wt%), which represents 19%, 17%, and 38% improvements, respectively, compared to when the neat copolymer (TiN-0(wt%)) was used using magnified sunlight irradiation stimulus. Overall, this finding provides the basis for the utilization of magnified sunlight irradiation stimulus to achieve excellent shape memory performance with TiN-filled polymer composites.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00360h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612813","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":"Frontiers in stimuli-responsive nanoplatforms: pioneering drug delivery in nanobiotechnology","authors":"Juan C. Cruz and Luis H. Reyes","doi":"10.1039/D4NA90074J","DOIUrl":"10.1039/D4NA90074J","url":null,"abstract":"<p >A graphical abstract is available for this content</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na90074j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141612874","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":"Colloidal spherical stibnite particles via high-temperature metallo-organic synthesis†","authors":"Maximilian Joschko, Christina Malsi, John Rapier, Paolo Scharmann, Sören Selve and Christina Graf","doi":"10.1039/D4NA00020J","DOIUrl":"10.1039/D4NA00020J","url":null,"abstract":"<p >Antimony trisulfide (Sb<small>₂</small>S<small>₃</small>) is an emerging semiconductor with a high absorption coefficient and a bandgap in the visible range. This makes it a promising material for various electronic and optoelectronic applications. However, one of the main challenges is still the synthesis of the material, as it is usually obtained either as a nanomaterial in its amorphous form with inferior optical properties or in crystalline rod-like structures in the micrometer or sub-micrometer range, which leads to application-related difficulties such as clogging in inkjet printing or spraying processes or highly porous layers in film applications. In this study, a one-pot synthesis of highly crystalline, spherical Sb<small>₂</small>S<small>₃</small> sub-micron particles is presented. The particles are growing encapsulated in a removable, wax-like matrix that is formed together with an intermediate from the precursors SbCl<small>₃</small> and <small>L</small>-cysteine. Both substances are insoluble in the reaction mixture but well-dispersable in the solvent 1-octadecene (ODE). The intermediate forms a complex crosslinked architecture whose basic building block consists of an Sb atom attached to three cysteine molecules <em>via</em> Sb–S bonds. Embedded in the matrix consisting of excess cysteine, ODE, and chlorine, the intermediate decomposes into amorphous Sb<small>₂</small>S<small>₃</small> particles that crystallize as the reaction proceeds at 240 °C. The final particles are highly crystalline, spherical, and in the sub-micron range (420 ± 100 nm), making them ideal for further processing. The encapsulation method could not only provide a way to extend the size range of colloidal particles, but in the case of Sb<small>₂</small>S<small>₃</small>, this method circumvents the risk of carbonization of ligands or insufficient crystallization during the annealing of amorphous material.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00020j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586218","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":"Finite element modeling of plasmonic resonances in photothermal gold nanoparticles embedded in cells†","authors":"Marina París Ogáyar, Rosalía López-Méndez, Ignacio Figueruelo-Campanero, Tamara Muñoz-Ortiz, Claire Wilhelm, Daniel Jaque, Ana Espinosa and Aida Serrano","doi":"10.1039/D4NA00247D","DOIUrl":"10.1039/D4NA00247D","url":null,"abstract":"<p >The use of plasmonic nanoparticles in performing photothermal treatments in cancer cells requires a full knowledge about their optical properties. The surface plasmon resonance is easily foreseen and measurable in colloidal suspensions, however it can be strongly modified when located inside cells. Assessing the optical behavior of plasmonic nanoparticles in cells is essential for an efficient and controlled treatment. This requires the combination of experimental data and computational models to understand the mechanisms that cause the change in their optical response. In this work, we investigate the plasmonic response of Au nanospheres (AuNSs) internalized into cancer cells (MCF-7). Experimental data are compared to the simulations provided by a 3D model based on a finite element method. We demonstrate the impact of physical parameters such as the type of NS assembly, the surrounding medium and the interparticle gap, in the photothermal efficiency of AuNSs. Results open the avenue to predict, by numerical calculations, the optical properties of plasmonic nanoparticles inside cells to minimize treatment costs and times in photothermal therapies.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na00247d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586216","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":"Introduction to Photocatalytic Materials for Clean Energy, Renewable Chemicals production, and Sustainable Catalysis","authors":"Rajeev Ahuja and Rajendra Srivastava","doi":"10.1039/D4NA90075H","DOIUrl":"10.1039/D4NA90075H","url":null,"abstract":"<p >A graphical abstract is available for this content</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":null,"pages":null},"PeriodicalIF":4.6,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/na/d4na90075h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571633","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}