Microporous and Mesoporous Materials最新文献

{"title":"Waste glass as a source for green synthesis of mesoporous adsorbent for efficient removal of heavy metals","authors":"Jean-Baptiste Mawulé Dassekpo ,&nbsp;Haiying Zhong ,&nbsp;Chonkei Iong ,&nbsp;Zhijun Dong ,&nbsp;Ningning Shao ,&nbsp;Innocent Sègla Dassekpo ,&nbsp;Dongmin Wang ,&nbsp;Jianqiao Ye","doi":"10.1016/j.micromeso.2024.113393","DOIUrl":"10.1016/j.micromeso.2024.113393","url":null,"abstract":"<div><div>Mesoporous analcime Adsorbent (MaA) was cogently synthesized in a hydrothermal reaction where a waste silica glass powder was mixed into NaOH solution. The satisfactory reaction properties were achieved by regulating the conditioning time (<em>Ct</em>), reaction temperature (<em>Rt</em>), and relative ratio of the reactants (<em>Rr</em> = SiO₂:Na₂O). XRF, XRD, SEM, BET, FTIR, AFM, TG and TEM analysis formed part of the selected samples. The prepared MaA adsorbent was then applied to treat Pb²⁺, Cd²⁺ and Cu²⁺ ions, thus effectively allowing the physicochemical properties (pH, temperature and contact duration), on the adsorption amount to be examined. Upon completion, the results indicated that the initial pH as well as the contact duration had notable effect on the adsorption amount. Conversely, the temperature change had an insignificant effect on the equilibrium adsorption amount. In addition, a dosage of 0.1 g of MaA, concentration of 1000 mg/L, pH ranging from 6 to 8, and temperature of about 25 °C were found to be the optimum process conditions for the adsorption of the examined heavy metals, whereas difference in contact time was recorded as follows: 1 h for Pb²⁺ and Cu²⁺ ions with adsorption amounts of 75.081 mg/g and 74.054 mg/g, respectively; and 3 h for Cd²⁺ ion with adsorption equal to 75.530 mg/g. In the analysis of the trend, the coefficients of correlation (R² = 0.99) of the Langmuir isotherm model were increasingly consistent compared to Freundlich isotherm model (R² from 0.10 to 0.55), thus indicating that the process to be a homogeneous monomolecular layer adsorption. Moreover, the kinetic aspects were similarly consistent in relation to quasi-secondary kinetic equation, which then further established that the process was primarily controlled by ion exchange, extra-particle, intra-particle, and liquid film diffusion. In addition, research on the potential reusability of MaA adsorbent after being employed to treat heavy metals was also performed. The crystalline phase of the composite after subjected to high temperature indicated wollastonite (CaSiO₃) and gregoryite (Na₂CO₃) as the main mineralogical phases. These minerals are beneficial in the preparation of functional building materials by promoting a sustainable solution for the full recycling of waste glass and contributing to efficient solid waste management and environment protection.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"383 ","pages":"Article 113393"},"PeriodicalIF":4.8,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structure determination of as-made zeolite ITQ-52 by three-dimensional electron diffraction","authors":"Juan I. Tirado ,&nbsp;Partha Pratim Das ,&nbsp;Jose L. Jorda ,&nbsp;Lukas Palatinus ,&nbsp;Sergi Plana-Ruiz ,&nbsp;Jorge Simancas ,&nbsp;Raquel Simancas ,&nbsp;Stavros Nicolopoulos ,&nbsp;Susana Valencia ,&nbsp;Fernando Rey","doi":"10.1016/j.micromeso.2024.113392","DOIUrl":"10.1016/j.micromeso.2024.113392","url":null,"abstract":"<div><div>The complete crystal structures of two as-made zeolites with the ITQ-52 structure (IFW framework type), where an alkylphosphonium and an aminophosphonium dications have been used as their respective organic structure-directing agents, have been solved by three-dimensional electron diffraction. Both organic cations have also been located within the 10-ring that connects the cavities of the IFW framework using the diffraction data.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113392"},"PeriodicalIF":4.8,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553781","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":"Optimization of surface silanol groups in mesoporous SBA-15 and KIT-6 materials: Effects on APTES functionalization and CO2 adsorption","authors":"Analía Natalí Arias ,&nbsp;Ana Laura Páez Jerez ,&nbsp;Álvaro Yamil Tesio ,&nbsp;Melisa Romina Serrano ,&nbsp;Norberto Alejandro Bonini ,&nbsp;Mónica Liliana Parentis","doi":"10.1016/j.micromeso.2024.113394","DOIUrl":"10.1016/j.micromeso.2024.113394","url":null,"abstract":"<div><div>Hybrid mesoporous silicas are potentially reusable promising adsorbents for CO₂ capture. Here SBA-15 and KIT-6 mesoporous silicas were synthetized by the sol-gel technique using a lower calcination temperature than the conventional one: 300 °C <em>vs.</em> 550 °C. This strategy aimed to maximize the surface hydroxyl group density and consequently, to improve functionalizing agent-loading performed by the post-synthesis grafting method. The as-obtained silica-based samples were then characterized and applied to CO₂ capture. A correlation between chemical-textural properties and adsorption capacities of pure and modified materials was discussed. The calcined at 300 °C silica supports, SBA-15-300-1 and KIT-6-300-1, with high silanol group densities showed better adsorption capacities overall pressure range. It is worth highlighting that the KIT-6-300-1: APTES adsorbent had a good stability performance, showing a drop of around 8 % over the aging time of a year. While, the SBA-15-300-1: APTES solid presented an excellent recycled performance after 10 adsorption-desorption cycles, maintaining about 95 % of its initial capacity.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113394"},"PeriodicalIF":4.8,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective remediation of toxic metal ions (Cd(II), Pb(II), Hg(II), and Ba(II)) using mesoporous glauconite-based iron silicate nanorods: Experimental and theoretical studies","authors":"Aya Fadl Allah ,&nbsp;Mohamed Shaban ,&nbsp;Haifa A. Alqhtani ,&nbsp;May Bin-Jumah ,&nbsp;Noof A. Alenazi ,&nbsp;Ahmed A. Allam ,&nbsp;Mostafa R. Abukhadra","doi":"10.1016/j.micromeso.2024.113390","DOIUrl":"10.1016/j.micromeso.2024.113390","url":null,"abstract":"<div><div>Glauconite minerals underwent an advanced exfoliation and scrolling process, yielding novel iron silicate nanorods (GRs) with increased surface area, reactivity, and improved physicochemical properties. These structures were introduced as superior adsorbents for the highly efficient adsorption of various toxic metal ions, such as Cd(II), Pb(II), Hg(II), and Ba(II). The GRs exhibited maximum adsorption capacities of 283 mg/g for Cd(II), 247 mg/g for Pb(II), 132.3 mg/g for Hg(II), and 165.2 mg/g for Ba(II). The adsorption properties of the GRs during the adsorption of these four metal ions were elucidated through traditional (Langmuir model) and advanced (monolayer model of single energy site) isotherm analyses. Advanced isotherm modeling revealed that the GR surface was saturated with numerous effective adsorption sites, with densities of 125 mg/g for Cd(II), 68.8 mg/g for Pb(II), 40.9 mg/g for Hg(II), and 57.9 mg/g for Ba(II). Moreover, each site could accommodate approximately four ions of the studied metals, which are vertically oriented and participate in multi-ionic adsorption reactions. Energetic analyses, whether based on classical models (Gaussian energy &lt;8 kJ/mol) or advanced models (adsorption energy &lt;40 kJ/mol), indicated that the adsorption processes are governed by physical mechanisms, including electrostatic attractions, van der Waals forces, and hydrogen bonding. Furthermore, thermodynamic assessments confirmed that the adsorption of these ions occurs through exothermic and spontaneous reactions.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113390"},"PeriodicalIF":4.8,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and characterization of Santa Barbara Amorphous-15 particles functionalized with mercaptopropyl groups and of their composites with poly(lactic acid)","authors":"Tamara M. Díez-Rodríguez ,&nbsp;Enrique Blázquez-Blázquez ,&nbsp;João P. Lourenço ,&nbsp;Juan C. Martínez ,&nbsp;María L. Cerrada ,&nbsp;Ernesto Pérez","doi":"10.1016/j.micromeso.2024.113391","DOIUrl":"10.1016/j.micromeso.2024.113391","url":null,"abstract":"<div><div>Santa Barbara Amorphous-15 (SBA-15) particles functionalized with mercaptopropyl groups (named as SBASH) have been prepared by a synthetic one-pot approach, and then have been incorporated into poly(lactic acid) (PLA), comparing their characteristics with those shown by composites attained with neat SBA-15 (PLASBA). The silica including the mercaptopropyl groups exhibits a certain loss of regularity because of its functionalization, although displays a better interaction with PLA than the pristine SBA-15 particles in the resulting materials. These composites (PLASBASH and PLASBA) also show a thermal stability slightly higher than neat PLA. An important nucleation effect of SBASH silica in the crystallization of PLA has been deduced from cooling experiments as well as from the cold crystallization in heating runs and from the degree of crystallinity reached. Small Angle X-ray Scattering (SAXS) profiles show that the PLA long spacings are rather similar for the different composites and the neat PLA. Thus, crystal size is rather similar in all samples. Microhardness values show an evident effect of reinforcement in all the composites compared with that shown by neat PLA. Nevertheless, the increase in rigidity is smaller in the biobased PLASBASH composites, those containing the modified silica, than in the PLASBA materials with the pristine SBA-15 particles.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113391"},"PeriodicalIF":4.8,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regioselective encapsulation of Pd clusters in hollow polycrystalline shell","authors":"Hongyan Wang ,&nbsp;Xinyue Sun ,&nbsp;Jingpei Cao ,&nbsp;Yajie Tian ,&nbsp;Bofeng Zhang","doi":"10.1016/j.micromeso.2024.113389","DOIUrl":"10.1016/j.micromeso.2024.113389","url":null,"abstract":"<div><div>Zeolite catalysts have been widely applied in petroleum and chemical industries. Nano/hierarchical structure could improve the utilization efficiency of active sites, especially for metal species encapsulated in zeolites. However, the uniformity of zeolite surface and crystallinity would decrease, leading to low stabilization effect. Herein, we developed a seed-directed method to prepare Pd clusters (∼1.3 nm) regioselectively encapsulated in hollow polycrystalline shell of Silicalite-1 zeolite. In nitrobenzene hydrogenation reaction, the optimized Pd@S-1-hp showed a high conversion of 92.2 % at 110 °C, which is 40 % higher than that of Pd clusters in bulk zeolite. Sub-nano Pd species in polycrystalline shell could significantly shorten the diffusion length on the basis of strong microporous confinement effect. Catalytic hydrogenation activity remained stable after six cycles. This structure could be extended to heterogeneous reactions suffering from diffusion limitation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113389"},"PeriodicalIF":4.8,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inherent porosity of Zeolitic Imidazolate Framework-62 melt leading to formation of the porous melt-quenched glass","authors":"Renjith B. Nelliyil ,&nbsp;Jaideep Mor ,&nbsp;Maciej Oskar Liedke ,&nbsp;Maik Butterling ,&nbsp;Eric Hirschmann ,&nbsp;Andreas Wagner ,&nbsp;V.B. Jayakrishnan ,&nbsp;Sandeep Kumar Sharma","doi":"10.1016/j.micromeso.2024.113387","DOIUrl":"10.1016/j.micromeso.2024.113387","url":null,"abstract":"<div><div>Porous glasses produced through melt-quenching of some selective metal organic frameworks like Zeolitic Imidazolate Framework-62 (ZIF-62) and ZIF-4 belong to the advanced functional materials because of their inherent porosity, ease of processing, high gas adsorption capacity and gas separation selectivity. We have delineated thermal induced modifications in the porosity features (pore size, size-distribution and pore density) of crystalline ZIF-62 from room temperature (RT) to its melt-state (&gt; melting point, <em>T</em>_m) followed by its quenching, back to RT, carrying out the depth sensitive positron annihilation lifetime spectroscopy (PALS) measurements <em>in-situ</em> at varying temperatures (RT−<em>T</em>_m). On heating under vacuum, the pores' size as well as size-distribution of crystalline ZIF-62 increases up to ∼473 K as a consequence of removal of entrapped solvent molecules and nonuniform thermal expansion. At higher temperatures (∼473 −573 K), a reduction in pores’ size and size-distribution is observed due to the loss of long range ordering and volume collapse. On melting, ZIF-62 turns into a porous liquid having ∼1.4 times larger pores compared to its crystalline form. The quenching of this porous melt is fully irreversible, and results in the formation of a porous glass having the pores larger than its crystalline counterpart. The <em>in-situ</em> PALS investigation provides the first experimental evidence of inherent porosity in ZIF-62 melt existing at high temperature that has been predicted before through molecular dynamics simulation of the ZIFs-based melts.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113387"},"PeriodicalIF":4.8,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximizing methane production in adsorptive nitrogen removal from natural gas: The impact of dehydration temperature on Ba-ETS-4 separation performance","authors":"Hafez Maghsoudi,&nbsp;Mohammad Azadi Tabar,&nbsp;Mohsen Gholami,&nbsp;Joeri F.M. Denayer","doi":"10.1016/j.micromeso.2024.113375","DOIUrl":"10.1016/j.micromeso.2024.113375","url":null,"abstract":"<div><div>Ba-ETS-4 is a promising adsorbent for nitrogen removal from low-grade natural gas. However, the Ba-ETS-4 adsorption characteristics, i.e., both adsorption kinetics and equilibrium capacity, change by dehydration temperature owing to structural shrinkage and pore contraction which finally impact the separation performance of the adsorption bed. In this paper, experimental breakthrough data are provided for N₂/CH₄ separation at various Ba-ETS-4 dehydration temperatures (250°C-450 °C) followed by a separation performance analysis in generating methane as the main product. Additionally, isotherm data at different temperatures (20 °C, 40 °C, 60 °C and 80 °C) are presented for selected dehydration temperatures (250 °C, 350 °C, 400 °C and 440 °C). The results revealed that an increase in dehydration temperature leads to a decrease in adsorption capacity but a better separation by providing more hindrance for CH₄ diffusion, while not affecting the N₂ breakthrough wavefront. At a dehydration temperature of 250 °C, the N₂ breakthrough time is the highest, indicating the ability to process a larger feed. However, this also leads to the least CH₄ production (0.037 mmol/g), as most of the fed CH₄ is adsorbed onto the bed. Interestingly, an increase in dehydration temperature leads to an increase in CH₄ production up to 420 °C (0.140 mmol/g), after which the CH₄ production decreases sharply.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113375"},"PeriodicalIF":4.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface-enhanced CO2 capture in ionic liquid-silica nanocomposites via sol-gel synthesis in the low partial pressure range","authors":"Marieke van Leeuwen ,&nbsp;Nina Plankensteiner ,&nbsp;Rahul Maity ,&nbsp;Jesus Gandara Loe ,&nbsp;Joeri F.M. Denayer ,&nbsp;Rob Ameloot ,&nbsp;Philippe M. Vereecken","doi":"10.1016/j.micromeso.2024.113374","DOIUrl":"10.1016/j.micromeso.2024.113374","url":null,"abstract":"<div><div>Ionic liquid-containing silica nanocomposites enable the capture of carbon dioxide from gas mixtures containing nitrogen, oxygen, and methane. Synthesis methods explored for such nanocomposites include impregnating porous silica and one-pot synthesis via a sol-gel process. This research investigates a non-hydrolytic sol-gel route for nanocomposite materials enabling CO₂ capture at low partial pressures (0.1–0.4 bar). The tetraethyl orthosilicate (TEOS) precursor condensation resulted in a silica matrix formed around ionic liquid domains, for bis(trifluorosulfonylimide) (TFSI⁻)-based ionic liquids with 1-butyl-1-methylpyrrolidinium (BMP⁺), 1-butyl-3-methylimidazolium (BMI⁺), 1-ethyl-3-methylimidazolium (EMI⁺) and 1-hexyl-3-methylimidazolium (HMI⁺) cations. Using a one-pot synthesis method enables exploring CO₂ sorption in such nanocomposites for ionic liquid-to-silica contents up to fourteen times higher than in previously reported studies. Moreover, the selected synthesis method provides greater tunability in deposition methods and their control. The silica host matrix was characterized by N₂ adsorption isotherms at 77 K after solvent extraction and supercritical drying of the material for ionic liquid removal. The pore size distribution of the freestanding silica network was observed via Scanning Electron Microscope (SEM) imaging and assessed with the Barrett-Joyner-Halenda (BJH) method for nanocomposites of different [BMP][TFSI]-to-silica ratio. The CO₂ uptake at pressures down to 0.1 bar was evaluated from CO₂ adsorption isotherms at 303 K. The confinement of [BMP][TFSI] resulted in a beneficial effect for the CO₂ uptake at lower partial pressures, with an uptake five times higher than the sum of the individual uptake expected from the contained ionic liquid and silica. The reported results show the advantage of a one-pot synthesis method for broader tunability of the nanocomposite, both regarding its content and application, as well as increased performance at lower partial pressures compared to the nanocomposite's individual constituents.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113374"},"PeriodicalIF":4.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional nanoplatforms based on alumina-coated mesoporous silica with potential for cancer theranostics applications","authors":"Jéssica de Lara Andrade ,&nbsp;Angélica Gonçalves de Oliveira ,&nbsp;Cezar Augusto Moreira ,&nbsp;Carlos Eduardo Scanferla ,&nbsp;Sandro Marcio Lima ,&nbsp;Luis Humberto da Cunha Andrade ,&nbsp;Paulo Rodrigo Stival Bittencourt ,&nbsp;Daniela Martins Fernandes de Oliveira","doi":"10.1016/j.micromeso.2024.113373","DOIUrl":"10.1016/j.micromeso.2024.113373","url":null,"abstract":"<div><div>Multifunctional nanoplatforms based on mesoporous silica coated with alumina were successfully and sustainably synthesized using sodium silicate extracted from rice husk ash (RHA), demonstrating the potential for cancer theranostics. The hybrid nanostructures produced (C2-600 and C4-600) from two different calcination times exhibited distinct morphologies, textural parameters, and degrees of mesoscopic organization. As expected, the Al₂O₃ coating on the mesoporous silica nanoparticles (MSNs) reduced the specific surface area from 720 m²/g to 122 m²/g (C2-600) and 57 m²/g (C4-600), while preserving their mesoporous structure. Additionally, both C2-600 and C4-600 showed relatively good stability across a wide pH interval, with a zeta potential of ζ = −15 mV and hydrodynamic diameter (D_h) ranging from 160 to 670 nm, depending on the pH of the medium. These peculiar characteristics resulted in high encapsulation efficiency (EE ≈ 90 %) for the doxorubicin (DOX) anticancer drug, as well as sustained drug release in simulated gastric fluid (SGF, pH 1.2) and simulated intestinal fluid (SIF, pH 7.4). Appreciably, C4-600-DOX released approximately 83 % of the drug over 96 h and demonstrated significant biodegradation in simulated biological media. Furthermore, the hybrid nanoplatforms exhibited strong optical absorption between 250 and 420 nm, along with broad and intense photoluminescence (PL) in the near-infrared (NIR) region (680–900 nm), which is highly desirable for NIR-fluorescence diagnostic imaging. Notably, the hybrid nanoplatforms without DOX were non-cytotoxic to fibroblast and Caco-2 cells, while the DOX-loaded nanoplatforms exhibited selectivity and potent anticancer activity, inhibiting approximately 80 % of Caco-2 colorectal cancer cells after 72 h. These findings demonstrate that C2-600 and C4-600 are innovative, multifunctional and biodegradable nanoplatforms with powerful potential as drug carriers and fluorescence imaging agents, making them promising candidates for cancer theranostics.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113373"},"PeriodicalIF":4.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}