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Journal of porous materials
Kluwer Academic Publishers
Journal of porous materials

Kluwer Academic Publishers

季刊

1380-2224

Journal of porous materials/Journal Journal of porous materialsSCIISTPCCR
正式出版
收录年代

    Acetylated narrow micropores carbon for CO2 and CH4 adsorption

    Honglong XieDailiu HuNian HeE. Yang...
    797-807页
    查看更多>>摘要：Abstract In this study, a series of microporous carbon bead adsorbents were prepared via the hydrothermal activation of acetyl-rich cellulose acetate with potassium hydroxide at elevated temperatures. The adsorbents were characterized through the use of a range of analytical techniques, including scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FT-IR), X-ray diffraction (XRD), HCS thermodynamic software, and Raman spectroscopy (Raman). The results showed that the surface pores of carbon microspheres were uniformly distributed with homogeneous narrow microporous structure (0.50–1.14 nm) when the acetyl group content was 54.5%, and the narrow micropores pore volume of the adsorbent increased with the increase of the acetyl group content, so that the CAC-54.5–700 had the highest V0.50–1.14 nm (0.47 m3/g), which provided an excellent adsorption site for the adsorption of CH4 and CO2, and at the same time The acetyl group provides more oxygen-containing functional groups (C–O), which improves the adsorption capacity and regeneration ability of the adsorbent. The carbon material CAC-54.5–700 showed excellent selectivity for CO2 and CH4 adsorption up to 6.05 mmol/g and 3.18 mmol/g, as well as for CH4/N2 (21.6), and the adsorption process conformed to the Freundlich model. After several adsorption–desorption cycles, the adsorption penetration time of CH4 was stabilized at 804 s/g, and the dynamic adsorption amount of CO2 was stabilized at 1.6 mmol/g, indicating that the prepared acetylated porous carbon has good potentials for application in CH4 and CO2 enrichment.
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    • Springer Nature

    Alkylsilyl protected amino acid based versatile organogelator for potential oil spillage recovery and waste water treatment

    Subhra Kanti MandalPiya SethTanmoy Kar
    809-820页
    查看更多>>摘要：Abstract The present work reports the synthesis of L-3,4-dihydroxyphenylalanine (L-DOPA) based small molecule organogelator 1 where the two phenolic –OH groups are protected by tertiary-butyldimethylsilyl (TBDMS) moiety. The amphiphile 1 exhibits excellent gelation properties in wide range of solvents ranging from aromatic solvents, alcohols, chlorinated solvents, petroleum fractions and crude oil. The minimum gelation concentration (MGC) varies from 0.25 to 1.5% (w/v) in these solvents. Formations of these gels are instantaneous and are thermoreversible in nature. Various spectroscopic and microscopic studies such as field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) etc. confirmed the crucial role of non-covalent interactions in gel formation. Rheological experiments confirmed the mechanical stability and viscoelastic nature of the prepared gels. Interestingly, gelator 1 exhibits selective gelation of various petroleum fractions like petrol, diesel, and kerosene from a biphasic mixture of oil-water. Gelator 1 also exhibits selective gelation of crude oil having high and low sulphur content from a biphasic mixture of oil-sea water. Additionally, the xerogels from 1 are useful in removing various toxic dyes from wastewater. Additionally, the xerogels from 1 are useful in removing various toxic dyes from wastewater having adsorption capacity of 6.8–19.0 mg of dye per 1 g of xerogel in 24 h.
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    Advanced Mn3O4/Fe3O4-carbon molecular sieve composite: a robust catalyst for heterogeneous photo-fenton oxidation of organic dyes

    Thanh Duong NguyenXuan Minh VuT. F. KouznetsovaThi Lan Pham...
    821-841页
    查看更多>>摘要：Abstract The development of an efficient and sustainable heterogeneous Fenton catalyst holds significant potential for improving wastewater treatment technologies. This study introduces a novel composite material integrating Fe₃O₄ and Mn₃O₄ nanoparticles into carbon molecular sieves (CMS). By combining these components, the research aims to enhance the degradation of organic dyes and address challenges related to catalyst recovery and stability. Mn₃O₄/Fe₃O₄/CMS composite materials were synthesized and evaluated for their photo-Fenton catalytic performance. The materials were characterized using PL spectroscopy, XRD, FE-SEM, TEM, TGA, UV-Vis DRS, EDX, and VSM, which demonstrated effective interaction and synergy between the Mn₃O₄, Fe₃O₄, and CMS components. TEM analysis revealed that in the Mn₃O₄/Fe₃O₄/CMS composite, the Fe₃O₄ nanoparticles exhibited an average size of approximately 50 nm, while the Mn₃O₄ nanoparticles were relatively smaller, with an average size of around 10 nm. VSM results showed a saturation magnetization of 32.63 emu/g, facilitating easy magnetic recovery. Systematic investigations revealed that Mn₃O₄/Fe₃O₄/CMS exhibited superior photo-Fenton activity with a degradation efficiency of 99.8% for methylene blue (MB) under optimal conditions (pH 3, catalyst dosage 0.3 g/L, initial MB concentration 25 mg/L, H₂O₂ concentration 0.03 mol/L, and temperature 30 °C), surpassing its individual components and binary composites. Kinetic studies showed the highest rate constant for Mn₃O₄/Fe₃O₄/CMS at 0.047 min⁻¹. Reusability tests indicated a slight decrease in degradation efficiency from 99.8 to 84.6% after four cycles, demonstrating good stability. Mechanistic investigations confirmed that hydroxyl radicals are the primary reactive species, with metal ions and electrons also contributing significantly. These findings contribute to the advancement of advanced oxidation processes and offer valuable insights for designing next-generation catalysts for environmental applications.
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    • Springer Nature

    Superhydrophobic porous organic cage decorated melamine sponge for efficient oil-water separation

    Rui LiQinghua ZhangZhanao LvNing Xu...
    843-854页
    查看更多>>摘要：Abstract Frequent oil spills generate large amounts of oily wastewater, which severely harms the environment. The development of efficient oil-water separation materials is of great significance for both ecological environment management and resource recycling. Herein, a hydrophobic sponge composite (MS@POCs) with the water contact angle of 142° was successfully prepared by in-situ growth of trifluoromethyl-functionalized porous organic cage (CPOC-302-CF3) on the surface of melamine sponge. The oil absorption capacity of MS@POCs for different oil substances was determined to be 62–123 mg/mg, and the adsorption performance remained unchanged after 15 adsorption-desorption experiments, demonstrating its good recoverability. More importantly, MS@POCs could effectively separate various oil-water mixtures and surfactant-stabilized water-in-oil emulsions with a maximum separation efficiency of 99.8%. This work presents a simple and effective method for fabricating hydrophobic sponges, which may also serve as a reference for designing other porous materials with high hydrophobicity.
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    Study on the direct introduction of titanium and niobium into silica-pillared magadiite

    Rafael C. LimaLeon F. FeitosaChristian W. LopesSibele B. C. Pergher...
    855-865页
    查看更多>>摘要：Abstract Transition metal-containing solids have been extensively studied due to the various properties that metals can offer in catalysis, electrochemical, and adsorption processes. Titanium-containing silicates have been investigated as catalysts for oxidation reactions. Despite receiving minimal attention, niobium-containing silicates show significant potential for catalyzing reactions involving biomass. In this study, titanium and novel niobium-containing pillared magadiites were obtained by a single route, with modifications achieved using pillaring sols from different metal sources, including alkoxides and oxalate. The influence of hydrolysis stabilization of the alkoxide sources was also evaluated. The resulting transition metal-containing magadiites exhibited Ti and Nb sites with distinct coordination environments on the surface and in the bulk regions. Textural properties were altered based on the metal source used in the pillaring sol. The results suggested that titanium was better incorporated through pre-stabilization, considering water and alkali content. In reverse, the metal sites on the surface seem linked to non-typical tetrahedral titanium in titanosilicates. Niobium was better incorporated when the precursor was directly introduced into the pillaring sols and presented surface sites when the Nb source was not reacted before being added to the pillaring sol. The obtained materials have the potential to be applied in the catalytic transformation of bulky molecules.
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    Renewable hydrocarbons via catalytic pyrolysis of sunflower oil using in situ metal-modified MCM-41

    Antônio Alex de Lima SilvaMarília Gabriela Araújo PereiraAna Claudia Bezerra de QueirózAdriana Paula Batista dos Santos...
    867-876页
    查看更多>>摘要：Abstract Extracting hydrocarbons from renewable sources is a key goal in the chemical industry. To achieve this, utilizing more efficient and selective catalysts during the conversion process is essential. This study developed metal-modified (La and Ni) mesoporous MCM-41 catalysts for the catalytic processes of thermodegradation and fast pyrolysis of sunflower oil. Lanthanum- and nickel-modified on mesoporous molecular sieve (MCM-41) were synthesized in situ by hydrothermal method. The catalysts were characterized by Thermogravimetric analysis (TG), X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infrared Spectroscopy (FTIR), Nitrogen adsorption-desorption at 77 K, and Transmission electron microscopy (TEM). The catalysts performance was evaluated by catalytic thermodegradation (Thermal analysis– TG, DTG and DSC) and fast pyrolysis (Pyrolyzer gas chromatography mass spectrometry– Py-GC-MS). Nickel- and Lanthanum-modified MCM-41 by in situ methodology increased the mesopore parameter, exhibiting metal-silica interactions, resulting in Si/Metal mass ratios of 48 and 77, respectively. The catalytic thermodegradation of sunflower oil shows that Ni-MCM-41 is more active than La-MCM-41. Ni-MCM-41 exhibited the highest deoxygenation activity, producing 56.37% hydrocarbons and achieving a 6.50% reduction in oxygenates compared to the thermal process. Both La-MCM-41 and Ni-MCM-41 catalysts showed high hydrocarbons production compared to thermal process, favoring the formation of compounds containing 14 and 17 carbons, respectively. These findings highlight the effectiveness of Nickel and Lanthanum metal-modified MCM-41 catalysts in producing renewable hydrocarbons from sunflower oil pyrolysis.
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    Three-dimensional porous carbon nanofibers scaffold to homogenize sodium deposition for dendrite-free sodium metal batteries

    Zilong LiXiaojie ZhangTingting LiuChangqi Duan...
    877-886页
    查看更多>>摘要：Abstract Sodium metal anode possesses the advantages of high specific capacity and low redox potential, yet poses safety concerns due to the formation of dendrites during operation. Herein, a three-dimensional porous carbon nanofiber (CNF) scaffold was constructed on the surface of commercial Al foil using chemical vapor deposition. During the chemical vapor deposition process, the uneven diffusion rate of carbon atoms within catalyst particles is determined by preferential deposition on specific crystal planes, leading to the formation of pores on the surface of CNF. The abundant mesopores on the surface of CNF and the three-dimensional scaffold structure can disperse the local current density, provide sufficient ion diffusion pathways, and effectively regulate the deposition behavior of Na metal. Consequently, the CNF/Al electrode operated for 300 cycles with an average Coulombic efficiency of 99.7% at 1 mA cm−2 and 1 mAh cm−2. The symmetric cell was demonstrated to remain operational for over 600 h at 1 mA cm−2 and 1 mAh cm−2. Additionally, the CNF/Al || NVP-C full cell also exhibited excellent Coulombic efficiency and cycling stability. This straightforward and scalable approach offers promising prospects for the extensive application of sodium metal anodes.
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    Noninvasive in-vivo human split-faced clinical investigation of nonanedioic acid loaded mesoporous silica nanoparticles immersed gel: revolutionizing cutaneous translational and cosmetical applications

    Tahreem ArshadHaji Muhammad Shoaib KhanSana MaryamHanasul Hanan...
    887-902页
    查看更多>>摘要：Abstract This study assesses the effectiveness of nonanedioic acid (NAA)-loaded mesoporous silica nanoparticles (MSNPs) in a 2% Carbopol gel for cutaneous restoration and anti-melanogenic therapy. The gel’s potential was evaluated through characterization and non-invasive skin hydration, elasticity, pigmentation, and rejuvenation tests. To verify amorphousness, thermal stability, and chemical makeup, MSNPs and NAA-MSNPs were characterized. The antioxidant activity of NAA and NAA-MSNPs was measured using the DPPH method, and spreadability tests were performed. The effects of the gel on the levels of melanin and erythema, sebum production, skin elasticity, moisture content, and facial pores were assessed using noninvasive in vivo tests. Patch tests on human volunteers demonstrated no skin irritation, and a panel test estimated the gel’s seven sensory and functional parameters. NAA-MSNPs showed improved antibacterial and antifungal activity compared to free NAA. SEM images showed spherical MSNPs and trials with human volunteers demonstrated significant improvements in skin parameters, including erythema, melanin index, hydration level, elasticity, sebum production, and facial pores, as illustrated by 3D visioFace imaging. Notably, the NAA-MSNP gel significantly reduced melanin levels by 16% after 12 weeks, enhancing skin hydration and elasticity. These results suggest that the NAA-MSNP-infused gel is a promising carrier for enhancing the efficacy of nonanedioic acid in skin care translational and cosmetical applications, particularly for depigmentation and anti-aging effects.Graphical abstract
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    Kanemite used as carrier of procainamide hydrochloride and sustained release of drugs

    Yufeng ChenYu ZhongYijun LiuFang Guo...
    903-913页
    查看更多>>摘要：Abstract Kanemite used as carrier of procainamide hydrochloride (PA) has been investigated. X-ray diffraction (XRD) and infra-red spectra (IR) suggested that the cationic PA was incorporated into the kanemite. Compositional analyses by CHN elemental analyzer and scanning electron microscope equipped with energy dispersive spectra (SEM-EDS) revealed that the loading capacity of the kanemite-based composite for cationic PA was about 24.70%. Drug release characterized by UV-vis absorption spectra showed an initial quick release followed by a sustained release. The mean cumulative concentration of the PA released either in phosphate buffer solution (pH = 7.4) or in HCl solution (pH = 1.3) with time was fitted well with ExpDec3 model, namely equation C = A1exp(-t/τ1) + A2exp(-t/τ2) + A3exp(-t/τ3) + C0. Moreover, the drug release exhibited small standard deviation, indicating good repeatability. Nuclear Magnetic Resonance results indicated that the chemical shifts of the hydrogen signals within PA changed significantly after the PA was incorporated into the kanemite, implying strong interaction between the kanemite and PA. Based on these results, the mechanism of PA incorporated into kanemite was proposed.
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    Facile synthesis of XGX-based hydrogel and its application for the removal of heavy metal ions from aqueous solutions

    Kopal KashaudhanPoorn Prakash PandeJyoti SharmaArbind Chaurasiya...
    915-933页
    查看更多>>摘要：Abstract The present study focuses on the use of Xanthan Gum xanthate-based hydrogel (XGX-g-PAM) obtained via free radical polymerisation of poly(acrylamide) on the surface of Xanthate of Xanthan Gum as a novel adsorbent for the efficient removal of heavy metal ions from synthetic wastewater. Four grades of hydrogel have been synthesized in all viz. XGX-g-PAM G-1, XGX-g-PAM G-2, XGX-g-PAM G-3, and XGX-g-PAM G-4 hydrogel. The hydrogel was characterized using various techniques like UV, FT-IR, SEM, XRD, GPC, TGA and ΔpHPZC analysis. The maximum swelling ratios (SR) of the prepared XGX-g-PAM G-3 hydrogel has been found to be 303.8, 275.35 and, 258.455 g/g in 1215 min for distilled water, tap water and grey wastewater. Furthermore, the water retention ratio (% WRR) for XGX-g-PAM G-3 is found to be 78.62%, 79.19% and, 80.95% for distilled water, tap water and, grey wastewater respectively after 1800 min. This shows that the hydrogel has an excellent swelling and water retention capacity. The concentration of Cu2+ and Co2+ ions in aqueous solutions has been determined spectrophotometrically with the help of a UV–visible spectrophotometer. The highest removal of 94.85% and 93.25% and maximum adsorption capacities of 312.5 mg/g and 281.69 mg/g were observed with the XGX-g-PAM G-3 hydrogel for Cu2+ and Co2+ ions, respectively. Further experiments were performed at varying adsorbent dosage, pH, time of contact, temperature, and concentration. Experimental findings suggest that the newly synthesized XGX-g-PAM hydrogel acts as an effective adsorbent for the removal of Cu2+ and Co2+ ions from aqueous solutions. Hence, the developed adsorbent has an excellent potential for the treatment of industrial wastewater containing toxic metal ions.
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    • Springer Nature