JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Xiaoxiao Zhang,Qingting Liu,Lei Xia,Dongyang Huang,Xudong Fu,Rong Zhang,Shengfei Hu,Feng Zhao,Xiao Li,Xujin Bao
To broaden the operating temperature range of phosphoric acid (PA) doped polybenzimidazole membrane-based proton exchange membrane fuel cells (PEMFCs) toward low temperatures, a novel series of poly(2,5-benzimidazole) (ABPBI)/sulfonated sepiolite (S-Sep) composite membranes (ABPBI/S-Sep) with low PA doping levels (DLs) were prepared via in-situ synthesis. The desirably enhanced mechanical, thermal, and oxidative stabilities of ABPBI/S-Sep composite membranes were achieved by constructing ABPBI chains arranged along the sepiolite (Sep) fibers and acid-base crosslinks formed between S-Sep fibrous particles and ABPBI chains. Benefiting from the richness of high temperature stable bound water and the excellent water absorbability of Sep particles that enable the formation of additive proton conducting paths, the composite membranes retained bounded PA and achieved much higher proton conductivities under both anhydrous and hydrous conditions compared to PA-doped ABPBI membranes. Proton conductivity values above 0.01 S/cm at 40–90 °C/20–98% RH conditions and 90–180 °C/anhydrous conditions as well as peak power density of 0.13 and 0.23 W/cm 2 at 80 and 180 °C with 0% RH, respectively from the ABPBI/2S-Sep composite membrane are more holistic compared to Nafion at low temperatures and polybenzimidazole-based membranes at high temperatures, respectively. The excellent properties of ABPBI/S-Sep composite membranes suggest them as prospective candidates for PEMFCs applications in a wide temperature range.
研究领域:
材料科学
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能源科学
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Yifei Ye,Zhuoshen Huang,Hao Pan,Zhaokun Wang,Wei Xia,Guangtong Hai,Ge Wang,Xiubing Huang
Transition metal oxyhydroxides are crucial for the electrochemical oxidation of 5-hydroxymethylfurfural (HMF), though the co-adsorption and activation mechanisms of HMF and hydroxyl species require further clarification. This study designs cerium-doped Co-based layered double hydroxide (LDH) arrays, including 3%Ce-Co 3 Fe 1− x Al x -LDH/NF, to investigate Fe as a secondary active center and the role of Ce–O–TM (Transition metal) bridges in regulating HMF/OH − adsorption. Theoretical calculations indicate that Ce–O–TM bridges induce f – p – d gradient orbital coupling, optimizing HMF/OH − adsorption configurations and facilitating the HMF oxidation reaction (HMFOR). Synchrotron radiation characterization and in situ Raman spectroscopy reveal that Fe enhances electronic interaction between Ce and Co/Fe sites, strengthening the stability of M–O bonds, suppressing metal dissolution, and further optimizing reactant adsorption. Fe doping also modulates charge distribution and accelerates charge transfer. The optimized 3%Ce-Co 3 Fe 1 -LDH/NF delivers industrial current density (0.1 A cm −2 ) at 1.44 V RHE , with 98.1% HMF conversion, 99.6% FDCA yield, and 99.8% Faradaic efficiency. In an anion exchange membrane (AEM) electrolyzer, it achieves 0.5 A cm −2 at 2.1 V while maintaining high stability across 0.1–0.5 A cm −2 . These results provide an effective strategy for designing high-performance HMFOR catalysts through electronic structure modulation.
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高影响因子
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Mingli Yue,Zhikuan Feng,Long Gao,Ying Fu,Fei Ye
Drug delivery systems utilize micro-nanomaterials as drug carriers, encapsulating drugs within micro-nanoparticles and releasing them to target tissues or cells via specific pathways. This technology enhances drug stability, prolongs drug retention time in the body, and reduces damage to healthy tissues. This study successfully synthesized novel carbon-doped zinc oxide (C/ZnO) micro-nanomaterials and employed polydopamine (PDA) for surface modification, resulting in the construction of C/ZnO/PDA carriers. Experimental results demonstrate that PDA modification significantly enhances the drug delivery performance of the material. This composite material exhibits a 5-Fu loading efficiency of 37.8%, representing a 1.15-fold increase compared to unmodified C/ZnO. In vitro release tests demonstrate sustained drug release characteristics, showing a 1.62-fold increase over the unmodified system. In addition, these medicine particles significantly enhanced the indicators of antibacterial and bactericidal efficacy. In vitro cell experiments also confirmed that the drug carrier can enhance the lethality of the drug against HepG2 cells. Research on the binding energy between the carrier and the drug revealed that PDA modification promotes drug-carrier binding, resulting in more stable overall adsorption. These findings demonstrate the potential application value of micro-nanoparticle-based targeted drug delivery systems in disease prevention and treatment.
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高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2022
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IF 11.533
Liqiang Zhang,Jiaojiao Liu,Dawei Li,Zhengda Yang,Xinwei Wang,Riyi Lin
To explore an effective method of utilizing nitrogen-rich microalgae, the two-step pyrolysis (TSP) characteristic of Nannochloropsis sp (NCS) over ZSM-5 were studied by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetric analyzer (TG). The results showed that the TG process of NCS was classified into three stages. ZSM-5 increased the final weight loss and the pyrolysis temperature of NCS. The kinetic analysis was conducted by Flynn-Wall-Ozawa method, and showed that the pyrolysis of NCS conformed to one-dimensional shrinking core model. ZSM-5 did not affect the kinetic model, but decreased the activation energy. Compared with one-step pyrolysis, TSP improved the selectivity of N-heterocyclic compounds in the first step. Catalytic TSP further reduced the complexity of products significantly, and increased the selectivity of olefins in the first step, nitriles and aromatic hydrocarbons in the second step. The possible catalytic TSP reaction pathways of NCS were proposed.
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高影响因子
Asian Journal of Pharmaceutical Sciences
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2016
·Vol. 11
·期 6
·735-743
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IF 0
Jingwen Guo,Yan Wang,Jing Wang,Xin Zheng,Di Chang,Siling Wang,Tongying Jiang
To achieve GSH-responsive 5-Fluorouridine (5-FU) delivery, a novel family of nanogel drug carriers has been successfully prepared. The new class of PAHy-based nanogels was prepared by the crossing-link reaction of poly- α , β -polyasparthydrazide (PAHy) chains and 3,3′-dithiodipropionic acid (DTDPA) consisting of a redox-responsive chain network. This particle highlights recent efforts in introducing a disulfide bond to drug delivery nanogel by DTDPA, and the increased release properties of complex nanogels produced excellent glutathione (GSH)-sensitivity and significant anti-tumor therapeutic efficacy. The PAHy-based nanogels were characterized by Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS) (nano-particle size ~200 nm), UV–vis spectrometry, X-ray diffraction (XRD) and differential scanning calorimetric (DSC). PAHy-based nanogels are promising controlled-release carriers for the tumor-targeting delivery of the anticancer agent 5-Fluorouridine.
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Materials Science & Engineering C-Materials for Biological Applications
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2017
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IF 4.164
Zhijia Zhang,Xiaole Zhao,Yingchun Su,Defeng Xing,Xiaojun Han
We demonstrate that antibacterial agent N , N′ -[(4, 5-dihydroxy-1, 2-phenylene)bis(methylene)]bisacrylamide (OHABA) can be assembled on the surface of vinyl organosilicon nanospheres (VOSNs) by atom transfer radical polymerization (ATRP). Chemically cross-linked vinyl organosilicon cores were facilely fabricated by sol-gel method as support, which densely grafted poly-OHABA (POHABA) as shells. Antibacterial assessment test results revealed that POHABA-based core@shell structure displayed high antibacterial performance, long-term stability, and kept broad-spectrum antibacterial effect of against Gram-negative and Gram-positive bacteria.
研究领域:
材料科学
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纳米医学
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抗菌材料
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高分子化学
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表面功能化
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高影响因子
FUEL PROCESSING TECHNOLOGY
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2026
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IF 7.7
Shangpeng Pan,Kaiwen Yun,Rui Shan,Shuxiao Wang,Taoli Huhe,Xiang Ling,Haoran Yuan,Yong Chen
For the high-value resource recovery of waste epoxy resin, this study prepared Nb and Ga modified ZSM-5 zeolite catalysts and systematically evaluated their performance in the catalytic pyrolysis of epoxy resin for aromatic hydrocarbon production. The results indicate that the bimetallic catalyst 8Nb4Ga (with 8% Nb and 4% Ga loading) exhibited the optimal catalytic activity, achieving the highest aromatic hydrocarbon yield of 68.6% under the conditions of 650 °C and a feedstock-to-catalyst mass ratio of 1:1. Characterization analyses confirmed that the metal species were well-dispersed on the ZSM-5 support without destroying the zeolite framework structure, though they induced changes in the pore structure. The introduction of Ga contributed to the formation of more mesoporous structures. Kinetic analysis revealed that the 8Nb4Ga catalyst significantly increased the apparent activation energy of the pyrolysis process, indicating that it guides the reactants through a higher-energy-barrier yet more selective pathway for aromatic hydrocarbon formation. This research provides theoretical support for the targeted catalytic conversion of waste epoxy resins into high-value aromatics.
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高影响因子
ACS ES&T Engineering
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2026
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IF 6.3
Zhenyu Gu,Jianhai Lu,Huimin Xu,Yemin Zhao,Shan Gao,Qiguang Dai,Xiaole Weng,Zhongbiao Wu
A novel Fe-doped ZSM-5 nanosphere catalyst was synthesized via a complex-assisted dynamic two-stage hydrothermal method using Na2EDTA as a chelating agent, followed by calcination under an inert atmosphere. The resulting material (Fe-ZSM-5EDTA-Ar) featured a hierarchical spherical architecture assembled from nanorods, possessing a high surface area (up to 511 m2/g), hierarchical porosity, and uniform dispersion of Fe species within the zeolite framework. Structural and spectroscopic analyses confirmed the successful isomorphous substitution of Fe2+/Fe3+ with a high proportion into the framework of ZSM-5, which concurrently enhanced structural stability and effectively suppressed iron leaching. Fe-ZSM-5EDTA-Ar demonstrated exceptional efficacy in the heterogeneous Fenton degradation of chlorobenzene (CB) employing H2O2 as the oxidant. This catalyst uniquely integrated high adsorption affinity with outstanding catalytic activity, resulting in complete dechlorination elimination of the target pollutant under optimized reaction conditions. Quenching experiments and electron paramagnetic resonance (EPR) collectively demonstrated that hydroxyl radicals were the dominant reactive oxygen species, driving the degradation process. Furthermore, Fe-ZSM-5EDTA-Ar also exhibited excellent recyclability in multiple cycles with negligible activity and iron loss. This work provides a robust synthesis strategy for designing stable and efficient zeolite-based Fenton catalysts for the remediation of chlorinated organic wastewater.
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高影响因子
JOURNAL OF CATALYSIS
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2026
·
IF 6
Xu Chen,Weijing Cao,Ziyi Fan,En Zhao,Lang Zhou,Zupeng Chen
AuPd-TCN enables photocatalytic 5-HMF oxidation coupled with H 2 evolution. • Achieving 69.2% DFF yield and 421.9 μmol·g⁻ 1 ·h⁻ 1 H 2 evolution rate within 2 h. • Revealing AuPd-TCN interfacial interactions to promote charge separation and transfer. • Confirming valence-band oxidation and conduction-band reduction coupling by DRIFTS and EPR. The selective oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-diformylfuran (DFF) coupled with hydrogen (H 2 ) evolution offers a sustainable strategy for the high-value conversion of biomass-derived platform chemicals and clean energy production. In this study, tubular carbon nitride (TCN) is first prepared via self-assemble of a supramolecular precursor, followed by the loading of AuPd bimetallic nanoparticles on its surface through an impregnation-reduction method to construct the AuPd-TCN photocatalyst. Under visible-light irradiation for 2 h, AuPd-TCN delivers a DFF yield of 69.2% and a H 2 evolution rate of 421.9 μmol·g −1 ·h −1 , markedly outperforming pristine TCN (22.4%, 17.7 μmol·g −1 ·h −1 ), Au-TCN (39.8%, 204.2 μmol·g −1 ·h −1 ), and Pd-TCN (48.6%, 255.4 μmol·g −1 ·h −1 ). Structural and photoelectrochemical characterizations reveal that Au and Pd form bimetallic nanoparticles on TCN with strong interfacial electronic interactions that promote the separation and transfer of photogenerated charge carriers. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms that the hydroxymethyl group of 5-HMF is selectively oxidized to an aldehyde group, while the furan ring skeleton remains intact during the reaction. Active species trapping experiments and electron paramagnetic resonance (EPR) analysis further demonstrate that photogenerated holes (h + ) and electrons (e - ) are the primary active species in this coupled reaction: h⁺ drives the selective oxidation of 5-HMF to DFF, while e - reduces H⁺ to H 2 on the AuPd bimetallic nanoparticles surface. This study provides an effective strategy for simultaneous biomass-derived chemical valorization and clean hydrogen production. Download: Download high-res image (147KB) Download: Download full-size image
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高影响因子
MOLECULES
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2026
·Vol. 31
·期 17
·3084
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IF 5.1
Shuyi Wu,Yanji Shi,Qihao Zheng,Jianle Yuan,Yilin Xiang,Yining Jiang,Jiaxing Zhang,Ajuan Zhou,Xinwen Guo
Low-cost synthesis of ZSM-5 zeolite is critical for its large-scale industrial application. Herein, a seed-assisted low-template hydrothermal route was employed to fabricate ZSM-5 zeolites. The regulatory effects of gradient crystallization temperatures on the crystallization kinetics, morphology, pore structure and acid properties of ZSM-5 were systematically investigated, and the structure–activity relationship linking temperature-driven evolution and catalytic behavior in benzene alkylation with methanol was established. The results reveal that increasing the crystallization temperature shortens the amorphous induction period, facilitates framework aluminum (Al) incorporation and increases the concentration of Brønsted acid sites. Meanwhile, crystallization temperature modulates the specific surface area and intercrystalline mesopore volume, thereby tuning the accessibility of acid sites and the mass transfer efficiency of reactants and products. The sample synthesized at a moderate temperature of 170 °C achieves an optimal balance between textural properties and acid concentration. Benefiting from its large specific surface area, abundant intercrystalline mesopores and high Brønsted acid concentration, the catalyst affords a benzene conversion of 69.1% and a methanol utilization of 79.1%, and maintains stable operation over 135 h on stream. The temperature-dependent regulation insights uncovered in this work facilitate low-cost synthesis of ZSM-5 and rational design of high-performance catalysts for aromatic alkylation.
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PubMed
高影响因子
Catalysts
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2026
·Vol. 16
·期 9
·761
·
IF 4.5
Haijian Yang,Changsen Zhang,Lianfeng Shang,Hanfang Feng,Na Xiao
Plastic waste has become a serious global issue. Thermal treatment of waste PET faces critical drawbacks including severe reactor clogging and low-value oxygen-rich bio-oil, restricting large-scale chemical recycling. Co-pyrolysis with hydrogen-rich low-density polyethylene (LDPE) over modified zeolite provides a viable route to overcome these barriers. In this study, reaction parameters including temperature, plastic/catalyst ratio and PET/LDPE ratio were optimized, and Fe-Ni bimetallic modified HZSM-5 was fabricated via impregnation to boost monocyclic aromatic hydrocarbons (MAHs) production. LDPE served as a hydrogen donor to facilitate PET deoxygenation via synergistic effects. At 550 °C with a plastic/catalyst ratio of 1:4 and PET/LDPE ratio of 2:3, the liquid yield hit 80.2%, and all detectable organic compounds in the liquid phase identified by GC–MS were aromatic hydrocarbons. Among all prepared mono- and bimetallic zeolites, 3Fe7Ni/HZ delivered optimal MAHs selectivity at 80.5%. This 20% promotion over unmodified HZSM-5 stems from balanced metal dispersion and tuned acid sites unique to Fe–Ni co-loading. This work offers a feasible strategy for converting waste plastics into high-value aromatics and further trials with varied metal contents will be needed to extend industrial applicability.
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高影响因子
Materials Chemistry Frontiers
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2026
·
IF 8.1
Yandai Lin,Muskan Saif Khan,Fengqi Xuan,Albina Abdossova,Cevat Erisken,Zhe Liu
Exploring and optimizing antitumor therapeutic strategies remains challenging but critical for future clinical translations. To this end, this study reported a type of engineered metal-organic framework-5 (MOF-5)-based nanosheet composite (MOF-5@ICG-HA/MOF-5@RB-HA, MIH/MRH) as well as their ultrasound (US)/laser actuation for reactive oxygen species (ROS) production and subsequent piezo/pyroelectric dynamic therapies. Mesoporous MOF-5 nanosheets were loaded with rose bengal (RB) or indocyanine green (ICG), followed by surface modification with hyaluronic acid (HA). Systematic physiochemical characterizations revealed that their energy band structure in conjunction with the mesoporous architecture promoted ROS generation and diffusion at the presence of US/laser actuation. Cellular uptake demonstrated that the HA-tag endowed these nanocomposites with specific binding capability to CD44 receptors on A549 cell. Upon US or laser actuation, these engineered nanocomposites exhibited remarkable tumor cell apoptosis in vitro due to the superb piezo/pyroelectric dynamic effects, and displayed excellent tumor inhibition rates (up to 92.8%) in vivo. Notably, the US-laser dual-actuated group demonstrated a significantly enhanced therapeutic performance with a tumor inhibition rate of 95.6%, which highlighted a marked advantage of combined actuations. Overall, these MOF-5-based nanocomposites have provided a promising strategy for effective combined A549 tumor therapy, and exhibited favorable prospects for clinical translation using commercial medical sono/photo-devices.
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高影响因子
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