JOURNAL OF POROUS MATERIALS
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2025
·
IF 3.2
Ding Yunlong,Wang Jiayin,Zhang Yanting,Pu Yongzhi,Hou Nan,Li Ning,Song Jinrui,Liang Yaning,Li Xiaofeng
This study aimed to synthesize a novel mesoporous template agent, KHBA, using 3-glycidoxypropyltrimethoxysilane (KH-560) and butylamine as raw materials, and to explore its application in the synthesis of ZSM-5 zeolites with nanocrystal aggregates. The physical and chemical properties of the synthesized ZSM-5 zeolites were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), and low-temperature N 2 adsorption–desorption The results showed that the introduction of KHBA effectively inhibited excessive crystal growth and promoted the formation of nanocrystal aggregates with a mesoporous structure. In the synthesis system with a KHBA-to-Al 2 O 3 molar ratio ranging from 1.6 to 4.8, the external surface area and mesoporous volume of the samples increased with increasing KHBA content. The sample synthesized with a KHBA-to-Al 2 O 3 molar ratio of 4.8 exhibited the highest external surface area (250.43 m 2 /g) and mesoporous volume (0.24 cm 3 /g). In the catalytic performance test for C8 aromatic hydrocarbon isomerization, the catalyst prepared with a KHBA-to-Al 2 O 3 molar ratio of 4.8 demonstrated the best performance, with isomerization activity of 23.79%, ethylbenzene conversion of 88.94%, and xylene loss of 3.42%. These findings highlight the potential of KHBA as an effective template agent for the synthesis of high-performance ZSM-5 zeolites in catalytic applications.
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FOOD RESEARCH INTERNATIONAL
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2025
·
IF 8
Yongxin Li,Wenni Tian,Fang Tian,Yanrong Zhao,Xuguang Zhang,Jie Xiao
This study introduces an innovative double emulsion (DE) system for the co-delivery of water-soluble 5-methyltetrahydrofolate calcium (5-MTHF-Ca) and lipid-soluble vitamin D 3 (VD 3 ), addressing the challenge of synchronized delivery for nutrients with divergent solubility. Through a two-step emulsification strategy, co-loaded DEs (C-5-MTHF-Ca & VD 3 ) exhibited superior colloidal stability compared to single-loaded counterparts (S-5-MTHF-Ca and S-VD 3 ), retaining 88.17 ± 2.64 % of 5-MTHF-Ca and 81.99 ± 2.45 % of VD 3 after 15-day storage. During in vitro digestion, co-loaded DEs demonstrated delayed lipid hydrolysis (38.01 ± 5.55 % FFA release at 30 min vs. 43.88 ± 13.79 % for S-VD 3 ) and preserved structural integrity through gastric phases, while synchronized intestinal micellar incorporation increased VD 3 bioaccessibility by 19.82 %. Ex vivo fluorescence tracking in mice revealed spatiotemporal co-localization of both actives, with jejunal accumulation peaking at 2–4 h post-administration, aligning with Ussing chamber results showing 2.13-fold enhanced VD 3 permeation and 1.80-fold enhanced 5-MTHF-Ca transport in co-loaded systems. Pharmacokinetic studies in rats confirmed bioavailability enhancement, with co-loaded DEs achieving 1.37-fold higher VD 3 AUC (6707.08 ± 1123.82 vs. 4898.36 ± 685.16 ng·h/mL) and 1.19-fold increased 5-MTHF-Ca C max compared to single-loaded formulations. The extended T max (by twofold) and prolonged t 1/2 K a (1.81-fold for 5-MTHF-Ca) indicated optimized intestinal retention, attributed to the phase-separated W/O/W architecture protecting actives from premature degradation. These findings establish a platform for nutrient co-delivery, where rational DE design enables spatiotemporally coordinated gastrointestinal transit, and synergistic absorption.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chunyan Tu,Hao Wang,Weiming Zhai,Chunting Liu,Wei Huang,Wenlin Li
Direct synthesis of aromatics from ethane and CO 2 using bifunctional catalysts composed of Zn and zeolite has drawn considerable interest in both academia and industry. Although a lot of research has explored the influence of Zn states on aromatization, the impact of zeolite defect structure on activity is still a black box. In this study, the distribution of Si and Al within the zeolite framework was precisely generated and tailored using post-treatment methods. A comprehensive set of characterization techniques, including XRD, SEM, nitrogen adsorption–desorption, MAS NMR, CP/MAS NMR, OH-FTIR, Py-IR, NH 3 -TPD, UV–vis DRS, XPS, and TG-MS, was employed to determine the structural changes. Our studies revealed that the active Si–OH sites could be effectively eliminated by the two-step alkali treatment. The chemical shielding of active Si–OH sites played a pivotal role in preserving the [Zn(OH)] + sites, which was crucial for the activation of ethane and CO 2 . The synergistic effect of Zn and Brønsted acid sites in zeolites catalyzing dehydroaromatization could be suppressed by the formation of [ZnO x ] 2+ sites within the zeolite. Notably, a high aromatics space–time yield of 3.3 mmol aromatics /g cat /h was achieved at 570 ℃ with a time on stream of 720 min on the Zn/ATH-0.1 catalyst, due to the joint contributions of Zn and Brønsted acid sites. We demonstrated the formation of Al pairs through the unique treatment, which subsequently served as key sites for regulating aromatics selectivity. These findings offer new insights into zeolite engineering, highlighting the importance of controlling Si–OH sites distribution for enhancing CO 2 -assisted ethane aromatization.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Yinze Yang,Pengxiao Wei,Yan Du,Shiyu Huang,Dongyang Li,Haiyang Cheng,Fengyu Zhao
The sustainable synthesis of primary amines from renewable biomass is a key goal of green chemistry. Reductive amination of furfural (FAL), a representative biomass platform molecule, provides a direct route to furfurylamine (FAM), yet noble-metal catalysts remain dominant in this field, limiting large-scale application due to high cost and scarcity. Herein, we report non-noble Ni/HZSM-5 catalysts with tunable SiO 2 /Al 2 O 3 ratios that achieve up to 99% yield of FAM with a high generation rate (10.8 mmol FAM mmol Ni −1 h −1 ) under mild conditions (90 °C, 1 MPa H 2 , 0.8 MPa NH 3 ). Mechanistic studies reveal that the synergistic interface between metallic Ni and Brønsted acid sites facilitates hydrogen activation and spillover, enhances imine adsorption, and stabilizes gem- diamine and is beneficial for its ammonolysis. The catalyst also demonstrates excellent recyclability and broad substrate scope, affording >90% yields of primary amines for the reductive amination of the various aldehydes and ketones. This work provides mechanistic insights into Brønsted acid–metal synergy and establishes a sustainable, cost-effective strategy for the green synthesis of primary amines.
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TALANTA
·
2026
·
IF 6.1
Mengjun Wang,Fanjie Xue,Miao Chen,Zheng Liu,Yi He
Herein, a colorimetric/fluorescence dual-mode sensor was developed for ultrasensitive detection of glyphosate, utilizing a Cu-based quasi-metal-organic framework NENU-5 (QN-5) and green-emissive carbon dots (GCDs). QN-5 mimics laccase activity by catalyzing the conversion of oxygen (O 2 ) into superoxide radical (·O 2 − ), which then oxidizes the phenolic substrate 2,4-dichlorophenol (2,4-DP) in the presence of 4-aminoantipyrine (4-AP) to generate a distinct red quinone imine (λ Abs = 510 nm, QI). The generated QI quenches the fluorescence of GCDs via the inner filter effect. However, the strong complexation between glyphosate and Cu 2+ inhibits the catalytic activity of QN-5, thereby reversing the colorimetric and fluorescence signals. The developed dual-mode sensor exhibits excellent sensitivity, achieving detection limits of 11 nM in fluorescence mode and 17 nM in colorimetric mode, with recoveries ranging from 92.50 % to 102.85 %. This sensor also exhibits satisfactory selectivity and anti-interference in real samples of soybean, soil, and river water.
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APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yan Zhao,Yang Gao
The microstructure of plasma-sprayed nanostructured yttria-stabilized zirconia (YSZ) coatings may change during high-temperature exposure, which would influence the coating performance and service lifetime. In this study, the phase structure and the microstructural evolution of 3YSZ (zirconia-3 mol% yttria) and 5YSZ (zirconia-5 mol% yttria) nanostructured coatings were investigated by means of sintering at 1400 °C for 50–100 h. The microhardness, elastic moduli, and thermal shock cycles of the 3YSZ and 5YSZ nanostructured coatings were also investigated. The results showed that the redistribution of yttrium ions at 1400 °C caused the continuous increase of monoclinic-phase zirconia, but no obvious inter-splat cracking formed at the cross-sections, even after 100 h. Large voids appeared around the nanoporous zone because of the sintering of nanoscale granules upon high-temperature exposure. The microhardness and elastic moduli of the nanostructured coatings first increased and then decreased with increasing sintering times. The growth rate of the nanograins in the 3YSZ coating was lower than that in 5YSZ, which slowed the changes in 3YSZ coating porosity during sintering. Although the 3YSZ coating was prone to monoclinic phase transition, the experimental results showed that the thermal shock resistance of the 3YSZ coating was better than that of the 5YSZ coating.
研究领域:
材料科学
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表面工程
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陶瓷涂层
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热障涂层
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高温材料
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JOURNAL OF THE CHINESE CHEMICAL SOCIETY
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2012
·Vol. 59
·期 12
·1571-1577
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IF 0.678
Wei Sun,Li Xu,Tongtong Li,Xiuzhen Wang,Guangjiu Li,Zhenfan Sun
A new electrochemical method was proposed for the determination of adenosine-5′-triphosphate (ATP) based on the electrooxidation at a molecular wire (MW) modified carbon paste electrode (CPE), which was fabricated with diphenylacetylene (DPA) as the binder. A single well-defined irreversible oxidation peak of ATP appeared on MW-CPE with adsorption-controlled process and enhanced electrochemical response in a pH 3.0 Britton-Robinson buffer solution, which was due to the presence of high conductive DPA in the electrode. The electrochemical parameters of ATP were calculated with the electron transfer coefficient (α) as 0.54, the electron transfer number ( n ) as 1.9, the apparent heterogeneous electron transfer rate constant ( k s ) as 2.67 × 10 −5 s −1 and the surface coverage (Γ T ) as 4.15 × 10 −10 mol cm −2 . Under the selected conditions the oxidation peak current was proportional to ATP concentration in the range from 1.0 × 10 −7 mol L −1 to 2.0 × 10 −3 mol L −1 with the detection limit as 1.28 × 10 −8 mol L −1 (3σ) by sensitive differential pulse voltammetry. The proposed method showed good selectivity without the interferences of coexisting substances and was successful applied to the ATP injection samples detection.
研究领域:
电化学
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分析化学
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生物传感器
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生物电化学
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
·
IF 3.9
Mengyu Wang,Shuhan Zhang,Chaoyue Meng,Fenglei Han
To enhance the conversion efficiency and product selectivity in CO2 hydrogenation to methanol, we prepared a series of Cu–Fe bimetallic catalysts with varied Cu/Fe ratios supported on HZSM-5 by an initial impregnation method and evaluated them in a dielectric barrier discharge (DBD) nonthermal plasma reactor. Among these, the Cu7Fe3/HZSM-5 catalyst achieved a CO2 conversion of 12.1% and a methanol selectivity of 9.6% in plasma-assisted CO2 hydrogenation, with activity decay below 3% over 400 min of continuous operation. The catalyst structure and surface properties were systematically investigated by SEM, XRD, BET, XPS, H2-TPR, CO2-TPD and CO-TPD. Catalytic performance was assessed under optimized plasma reaction conditions (CO2/H2 = 1:3, total flow 70 mL·min–1, discharge power 20 W, circulating water temperature 30 °C). Furthermore, in situ DRIFTS indicated an oxygen vacancy-dominated formate pathway: oxygen vacancies in FeOx strengthened CO2 chemisorption and induced polarization of the C═O bond; Cu+ sites facilitated sequential hydrogenation of formate intermediates (HCOO*); and the Cu0-HZSM-5 interface optimized H* spillover, collectively suppressing CH4 formation. These results underscore that vacancy engineering and metal–zeolite interfacial effects are pivotal in steering plasma-catalytic CO2-to-methanol selectivity.
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2024
·
IF 1.4
Wenhe Yu,Xiaowen Wu,Dingyi Zhang,Ruiyu Mi,Minghao Fang,Xin Min,Zhaohui Huang
In this work, single-phase ZSM-5 zeolite was synthesized using solid waste coal fly ash (CFA) as raw material, providing a potential alternative for creating high-value-added products from this waste. X-ray diffraction (XRD), scanning electron microscopy, X-ray fluorescence, Fourier transform infrared spectroscopy, N2 physisorption, and other techniques were used to evaluate the crystallization and morphology of the ZSM-5 obtained. The results indicated that ZSM-5 can be synthesized by the simple method of mixing, stirring, and heating. A well-defined hexagonal shape of ZSM-5 with a specific surface area of 162 m2/g and mesoporous structure was obtained at the temperature of 160 °C during hydrothermal treatment for 72 h. Theoretically, the mechanism of crystal growth of ZSM-5, i.e. the liquid phase nucleation and step growth models, was clarified. These results open the possibility of exploring the crystallization of ZSM-5 and the utilization of CFA. Simultaneously, the critical roles of silicon in framework formation and crystallization control during the formation and growth of zeolites were elucidated.
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ChemCatChem
·
2026
·Vol. 18
·期 5
·e70662
·
IF 4.1
Mengjiao Yu,Xiong-Fei Zhang,DongEn Zhang,Jianhao Qiu,Jianfeng Yao
The development of stable, efficient catalysts for fructose conversion to 5-hydroxymethylfurfural (5-HMF) remains a challenge. While sulfonation enhances Brønsted acidity in metal–organic frameworks (MOFs), it often compromises their structural integrity. This work addresses the critical challenge by demonstrating that amino (–NH 2 ) functionalization in MIL-53(Al) acts as a stabilizer, enabling the framework to withstand direct modification with chlorosulfonic acid and facilitating the introduction of sulfonic acid groups. The resulting sulfonated catalyst, MIL-53-N/S(1), achieves an outstanding 5-HMF yield of 84.3% in a biphasic system (170°C, 6 h). This work underscores the dual role of amino functionalization in stabilizing MOFs and enabling efficient acid catalysis for biomass conversion. Graphical A strategy using amino-functionalized MIL-53(Al) was proposed, where pre-grafted –NH 2 groups facilitate effective sulfonation to create abundant –SO 3 H sites without compromising framework stability. This approach addresses the challenge between acidity and structural degradation of MOFs. Under optimized conditions, MIL-53-N/S(1) achieves an HMF yield of 84.3%, demonstrating its potential for practical biomass valorization.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Wenlin Li,Qijia Chen,Xin Ning,Jiajun Zheng,Ke Liang,Lei Han
Self-pillared nano-ZSM-5 (SPZ) boosts 1-hexene oligomerization stability for SAF. • Accessible strong Brønsted acid sites promote branching and cyclization reactions. • 2D-GC–MS shows C12–C17 products dominate while aromatization remains minor. • Lower N 2 flow favors deeper oligomerization, enriching heavier and jet-fuel-range products. • Oligomer-derived soft coke drives deactivation and enables partial N 2 reactivation. Developing high-performance catalysts for the oligomerization of bio-derived olefins into sustainable aviation fuels (SAF) is of paramount importance. However, simultaneously achieving high catalytic activity and selectivity while mitigating the rapid deactivation of nano-zeolites remains a formidable challenge. To drive the efficient production of SAF, a novel self-pillared nano-ZSM-5 (SPZ) zeolite featuring an enriched acidic profile was designed in this work, delivering exceptional activity, selectivity, and stability for 1-hexene oligomerization. Compared with nano-sized ZSM-5 featuring intercrystalline mesoporous voids (NSZ), the SPZ catalyst significantly improved catalytic performance, increasing 1-hexene conversion from 20% to 61% at 240 °C while prolonging catalyst lifetime. DTBPy-FTIR, and TEOS passivation collectively support the involvement of external and pore-mouth acid sites in 1-hexene conversion and further indicate that these accessible sites may also promote secondary cracking. Semi-quantitative, area-normalized 2D-GC–MS responses were dominated by C12-C17 oligomer-derived species and showed extensive branching and cyclization, whereas aromatics remained minor. Variation of the N 2 flow rate shifted the recovered product distribution through coupled changes in reactant dilution, nominal contact time, and product stripping. Deactivation was associated mainly with retained oligomer-derived soft coke. These results identify accessible acidity and transport as coupled descriptors for tuning unsaturated jet-fuel-range precursors over hierarchical ZSM-5. Download: Download high-res image (220KB) Download: Download full-size image
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JOURNAL OF LIPOSOME RESEARCH
·
2025
·
IF 4.3
Han Chen,Jin Su,Wenhui Cheng,Linwen Wen,Meiqi Huang,Xuejiao Li,Wei Cai,Qian Ning,Liangjun Guan
5-Fluorouracil (5-Fu) is a chemotherapy drug that can treat various cancers. However, its short plasma half-life and severe adverse reactions limit its wide application in clinical utility. To overcome these drawbacks, in this study, 5-Fu long-circulating liposomes (SSL-5-Fu Lip) were prepared by the film hydration method. DSPE-PEG2000-FA was conjugated to the surface of SSL-5-Fu Lip through amidation reaction, resulting in the successful preparation of FA-SSL-5-Fu Lip. The particle size and zeta potential were measured. The encapsulation efficiency of 5-Fu was determined by high-performance liquid chromatography (HPLC), and the drug loading was calculated. The stability of FA-SSL-5-Fu Lip was evaluated at 4 °C based on particle size and PDI. Pharmacokinetic studies were conducted in male Sprague-Dawley (SD) rats. The average particle size of the liposomes was 139.11 ± 3.1 nm, and the zeta potential was −4.30 ± 0.91 mV. The encapsulation efficiency and drug loading of 5-Fu were 76.88 ± 4.23% and 24.14 ± 0.97%, respectively. The half-lives of 5-Fu and FA-SSL-5-Fu Lip were 0.319 h and 1.059 h, respectively. It can be preliminarily proved that FA-SSL-5-Fu Lip has the effect of prolonging circulation time. Compared with free 5-Fu, it prolongs the circulation time of the drug in the body, laying a foundation for its clinical application.
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