Journal of Porous Materials最新文献

Developing advanced electrode materials with both high energy density and outstanding long-term stability is essential for next-generation supercapacitors. In this work, a novel FeCoW/rGO nanocomposite was synthesized via a one-pot hydrothermal method and thoroughly characterized, revealing hierarchical flower-like FeCoW nanospheres uniformly anchored on reduced graphene oxide to form a highly porous, three-dimensional architecture. The electrode displayed a high specific capacitance of 525.16 F g⁻¹ at 1 A g⁻¹, a notable energy density of 26.25 Wh kg⁻¹, and remarkable cycling stability, retaining 94.48% of its initial capacitance over 5000 cycles. This superior performance arises from the synergistic redox activity of Fe, Co, and W, the conductive rGO framework, and the unique hierarchical structure, which collectively promote abundant active sites, facilitate rapid ion/electron transport, and alleviate mechanical stress during cycling. These results establish FeCoW/rGO as a promising and durable electrode material for advanced energy storage applications.

High silica ZSM-5 is a promising catalyst for the methanol to propylene (MTP) process but requires improved stability and regenerability on an industrial scale. Here, we prepared a nano-sized ZSM-5 via the seeding technique and developed its physiochemical characteristics using combined desilication and phosphorus modification. This approach combines the advantages of the above-mentioned methods and can be easily scaled up to an industrial level. The resulting catalyst exhibited a prolonged catalytic lifetime (77 days; about three times that of conventional ZSM-5) with high regenerability (70% restored catalytic activity in the second reaction cycle) and also produced a high amount of propylene from converted methanol ((:{text{A}}_{{text{C}}_{text{3}}{text{H}}_{text{6}}})) at lifetime per gram of zeolite catalysts (293.9 (:{text{g}}_{{text{C}}_{text{3}}{text{H}}_{text{6}}}text{/}{text{g}}_{text{cat}}) in the first reaction cycle and 203.1 (:{text{g}}_{{text{C}}_{text{3}}{text{H}}_{text{6}}}text{/}{text{g}}_{text{cat}}) in the second reaction cycle). It could be concluded that shortening the diffusion path, mesoporization, and moderating the acidity are responsible for such high stability and regenerability.

In response to escalating demands for energy-efficient and acoustically optimized materials, this study develops a lightweight interpenetrating network (IPN) composite felt via skeleton fragmentation reconstruction of melamine foam (MF) and ultrafine glass fibers (UGF). Utilizing a scalable wet-laid sheet forming technique, MF was mechanically fragmented and uniformly integrated with UGF at controlled mass ratios (M7G3-M3G7). Comprehensive characterization revealed that the hybrid architecture simultaneously enhances thermal insulation and acoustic performance. Microstructural analysis confirmed a dual bonding mechanism-bridging and interpenetration-between MF trident-like skeletons and UGF, forming tortuous micropores (2–25 μm). Optimal thermal insulation was achieved with M3G7 (30.83 mW/m·K), leveraging synergistic hindrance from organic–inorganic heat transfer mismatches and suppressed convection in narrowed pores. Mechanically, M5G5 exhibited superior compressive strength (> 900 N at 5 mm displacement) due to fiber reinforcement, while M7G3 showed high elasticity (75% rebound). Acoustic testing demonstrated broadband sound absorption (up to 0.8 at 4000–6000 Hz) and frequency-dependent insulation (6–18 dB), attributed to pore-mediated wave scattering and viscous dissipation. This work has addressed the “sound-heat-force” performance trade-off issue existing in multi-functional composite materials, enabling the exploration of next-generation sustainable solutions for global energy conservation and reduction of noise pollution. It also paves the way for subsequent in-depth component proportion optimization to achieve balanced high-performance multi-functional materials.

A mesoporous SBA-15 compound was mogenous composite was thoroughly characterized using various techniques, including Infrared spectroscopy (FT-IR), Energy dispersive X-ray (EDX) for elemental analysis, scanning electron microscopy (SEM) for investigating surface morphology, thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM) and, N₂ adsorption–desorption isotherms (BET). Vibrating-sample magnetometry (VSM) technique is used to measure magnetic properties of SBA-15/Fe₃O₄@MEL. The catalytic performance of the nanocomposite was then evaluated in the synthesis of quinazolinone compounds, yielding electron-withdrawing and electron-donating groups in high yield. Many of these derivatives exhibit important properties, including biological activity. These materials are known, and their identification has been reported through comparison of their spectral data with the literature.

A systematic approach was developed for synthesizing a copper quantum dot embedded, silica reinforced, and hierarchically ordered, porous biogenic carbonaceous (HPC) material from pre-activated carbon of the Mimosa pudica plant via sol-gel and alcothermal processes. The substantial functional entities on the partially activated carbon enabled an organized interaction with silica, copper oxide and a polymer template, resulting in a Cu-doped silica reinforced ordered mesoporous carbon material (Cu-SOMC) from the crude plant. The meso-phases (2θ values and h, l, k values 22.08^o and 9.48^o), crystalline structure and the oxidation state of Cu in Cu-SOMC are characterized by XRD, XPS analysis and TEM-SAED patterns. SEM, TEM and SEM-EDAX analysis revealed the silica reinforcement, a hierarchically ordered arrangement of carbon layers, uniform distribution of Cu₂O (3–6 nm), pore size distribution (0.106 cm³/g) and chemical composition of the synthesized material. The modified Cu-SOMC/GC electrode fabricated from Cu-SOMC exhibited good selectivity and sensitivity against the mammalian metabolic biomarker creatinine (CA). The electrode showed a wide range of concentrations (10–100 µM), a broad scan rate range (10–100 mVs⁻¹) and a low detection limit at 2 nm via the electrochemical method.

This study explores the synthesis of oxygen rich activated carbon (AC) material derived from a toxic and inexpensive weed Parthenium hysterophorus. The synthesized carbon material (AC) was used for dual applications: removal of Levofloxacin (LEV) from wastewater and as an electrode material for supercapacitor. The AC was characterized by FESEM, HRTEM, BET, XRD and FTIR techniques. Morphological investigations revealed irregular, stacked graphitic flakes and amorphous nature of AC, whereas elemental mapping verified a carbon-rich composition (78.2%) with integrated oxygen (21.8%). A pore width of 3.4 nm and a surface area of 1.043 m²/g were identified by BET analysis consistent with type III isotherm. FTIR analysis verified the existence of different functional groups enhancing the interaction with LEV by π–π, hydrogen bonding and electrostatic interactions. The adsorption dose experiment displayed that 7 mg dose of AC effectively remove 77% of LEV drug (0.018 g/L). Furthermore, the specific capacitance obtained at 10 mV/s is 1718 F/g. The excellent specific capacitance proves the high storage capacity of AC. Further in case of device, the specific capacitance for first cycle is 6.25 Fg⁻¹. Further, from the twoelectrode system, the device retained 80% its original efficiency. Langmuir and Freundlich models were found to be applicable by isotherm studies, indicating monolayer and multilayer adsorption mechanisms. Parthenium hysterophorus offers a viable path for energy storage and environmental remediation. It can also be used as a cost-effective and eco-friendly raw material for producing functionalized activated carbon.

The search of appropriate methods for the synthesis of micro-mesoporous zeolites is of a high importance for the development of the catalysts with improved characteristics. This study investigates the influence of the base and acidic post-synthetic treatment on the physicochemical properties of ZSM-12 zeolite. A comprehensive suite of characterization techniques was employed to analyze the developed materials, including X–ray diffraction (XRD), X–ray fluorescence (XRF), low-temperature nitrogen adsorption-desorption, temperature-programmed desorption of ammonia (NH₃–TPD), infrared spectroscopy (IR), scanning electron microscopy (SEM), elemental analysis, transmission electron microscopy (TEM), solid–state nuclear magnetic resonance (NMR) spectroscopy of ²⁷Al and ²⁹Si nuclei, and pyridine-adsorbed IR spectroscopy (IR–Py). Post-synthetic treatment was found to create micro-mesoporous structure and enhance the total surface area of the zeolites. As a result, an improved catalytic activity of the modified materials in comparison with parent ZSM-12 in m-xylene isomerization was established.

In this work, a novel Sodium Alginate (SA)-Pullulan (PA)-based hydrogel was synthesized via chemical crosslinking using epichlorohydrin (ECH) for the removal of Crystal Violet (CV) and Auramine O (AO) dyes from aqueous solutions. FTIR confirmed the successful crosslinking of ECH onto the SA and PA backbones, while XRD, TGA, EDX and SEM analyses were performed to characterize the synthesized adsorbent. TGA results showed that the SA-ECH-PA hydrogel possesses higher thermal stability than pullulan. SEM analysis revealed that the incorporation of ECH into the polymeric backbone considerably enhanced the surface roughness. FTIR and XRD analyses were also conducted after dye adsorption to investigate possible structural and chemical changes in the hydrogel surface. The kinetic and isotherm data were best fitted to the pseudo-second-order and Langmuir models for both dyes. The monolayer adsorption capacities were 2.57 mg/g for CV (pH 7, 10 mg/L, 25 °C, 210 min) and 9.34 mg/g for AO (pH 7, 40 mg/L, 25 °C, 270 min). The percentage removals (%R) achieved were 93.12% for CV and 91.43% for AO under their respective optimal conditions. Thermodynamic studies indicated that the adsorption processes were spontaneous, exothermic and accompanied by a decrease in entropy. Overall, the synthesized adsorbent demonstrated good performance in wastewater treatment, suggesting its potential for practical application.

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Acenaphthene (ACE), a pervasive ambient air pollutant, constitutes considerable health threats even at low concentrations. Although carbonaceous materials are commonly utilized for ACE remediation, their efficiency is still debated with experiments showing their effects under different conditions. The mechanisms explaining these seemingly contradictory observations are not fully understood, limiting the development of adsorbents with stable and predictable performance under varying thermos-hygrometric conditions. To address this gap, we synthesized a material featuring a tailored morphology, mesoporous architecture, and rich surface functionalization, and we carried out an extensive characterization using SEM, BET, FTIR, VSM, and XRD techniques to quantify structural, thermal, and magnetic properties. The Fe₃O₄ nanoparticles-functionalized activated carbon (BG-AC@NPs) demonstrated a high gas-phase ACE removal efficiency of 99.7% under controlled adsorption conditions, and the equilibrium was stabilized within 40 min, with a maximum adsorption capacity (BG-AC@NPs) of 378.3 mg/g. Adsorption kinetics were precisely fitted through the use of a pseudo-second-order (PSO) model, which gave an R² coefficient higher than 0.940. Moreover, the Langmuir model provided a good representation of the adsorption isotherms and the R² value is > 0.988, indicating the occurrence of monolayer adsorption. Thermodynamic analysis indicated a positive ΔH° (51.354 kJ/mol) and ΔS° (0.024 J/mol K), together with a negative ΔG°, it verifies the spontaneous, endothermic nature of adsorption with enhanced randomness. Notably, BG-AC@NPs retained over 80% efficiency after multiple regeneration cycles. This study advances gas-phase adsorption systems by integrating material design and thermal-kinetic measurement strategies. Furthermore, it highlights how solid-gas clustering phenomena at pore inlets influence adsorption kinetics even at optimum levels, guiding the optimization of pore structure and surface chemistry for high-performance PAHs capture.

Graphical abstract

A simple, sensitive, and high-efficiency method was presented for the extraction and preconcentration of trace amounts of carmoisine. In this method, SBA-15 modified with cetyltrimethylammonium bromide (SBA-15/CTAB) was used as a suitable adsorbent. UV-Vis technique (ʎ_max=522 nm) was used to study the amount of carmoisine absorption. The characteristics of SBA-15 and SBA-15/CTAB were investigated by transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR), map analysis, Energy dispersive X-ray (EDX), and CHN elemental analysis. Some parameters such as pH, amount of nanocomposite, recovery solvent, surfactant volume were investigated for the extraction of carmoisine by SBA-15/CTAB. The calibration curve was obtained linearly in the range of 0.3–20 ng mL⁻¹ with a detection limit of 0.12 ng mL⁻¹. A concentration factor (PF) was calculated at about 50. The proposed method for measuring of carmoisine was applied at a negligible level in food samples such as cherry juice, blackberry juice, pomegranate juice, red grape juice, blueberry juice, cherry jelly, ketchup, tomato paste, smarties, and cherry compote with satisfactory results.