BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Runran Ma,Te Li,Xueying Li,Jianwei Han,Xin Zhang,Tingting Di,Jiabo Wang,Weijun Kong
A ratiometric electrochemical aptasensor was developed for ultra-sensitive detection of cortisol using aptamer (Apt) as recognition element, methylene blue (MB) as signal probe, and zirconium metal–organic framework (Zr-MOF) as carrier loaded with abundant MB for signal amplification. The carboxylated multi-walled carbon nanotubes (cMWCNTs)-modified Au electrode showed excellent electrochemical performance to immobilize complementary DNA (cDNA) for hybridizing with MB@Zr-MOF-Apt via amide bonds. In the presence of cortisol, it would compete with cDNA for binding the Apt, resulting in the detachment of MB@Zr-MOF-Apt complex from the electrode surface, and the electrochemical signal of MB was decreased, while that of [Fe(CN) 6 ] 3−/4− was basically unchanged. The ratio of the electrochemical signals of [Fe(CN) 6 ] 3−/4− to MB was proportional to the cortisol concentration. Due to the greatly enhanced conductivity of the cMWCNTs-decorated Au electrode and the largely improved EC signals of Zr-MOF encapsulated MB probes, this ratiometric electrochemical aptasensor offered high sensitivity with an ultra-low detection limit of 0.0046 nM and a wide linearity of 0.01–1000 nM, as well as satisfactory accuracy with recoveries of 93.79–106.76 % in artificial sweat samples, providing a potential strategy for the detection of more trace hormones in different clinical samples by simply replacing the corresponding aptamers.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Jiangyan Song,Yongyi Yu,Ziyi Zhang,Weisen Yang,Wenbin Pan,Shaoju Jian,Shaohua Jiang,Jiapeng Hu
Deposition of excessive phosphate in natural water column caused several issues, like the eutrophication and destruction of aquatic ecosystems. Adsorption has been an effective and convenient method for phosphate elimination. Herein, a novel bimetallic metal–organic framework adsorbent, namely, La-Zr-MOF, was prepared, and the morphology, crystallite, characteristic functional groups, specific surface area, and composite material surfaces were analyzed using XRD, FT-IR, SEM-EDS, and BET. The adsorption performance of the adsorbent was systematically evaluated by batch adsorption experiments, and the adsorption thermodynamic and kinetic properties were analyzed. The results reveal that La-Zr-MOF exhibits a high selectivity and sorption performance for phosphate, and the adsorption of La-Zr-MOF follows the Langmuir and pseudo–second-order models; the phosphate removal procedure is a chemisorption accompanied by an endothermic reaction, and the maximum capacity was 127.7 mg g −1 . Combined with batch adsorption experiments, kinetic and thermodynamic studies and various characterization analyses together revealed the phosphate removal mechanism, mainly ligand exchange and electrostatic interactions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
IF 4.8
Junxue Li,Lingyi Li,Shengnan Zhang,Wei Cheng
In addressing eutrophication resulting from phosphate accumulation, multi-metallic oxides often outperform single-metallic oxides in phosphate adsorption capacity. While alumina is abundant, its stability in acidic or alkaline environments is limited. Contrastingly, zirconium and cerium oxides demonstrate superior acid and base resistance, alongside specific phosphate affinity. This study focuses on the synthesis of Zr-Al and Ce-Al binary oxide nanoparticles through a sol-gel approach for phosphate removal from aqueous solutions, evaluating their efficiency through batch experiments. By judiciously adjusting the Zr/Al and Ce/Al ratios, binary oxide nanoparticles with distinct structures, grain sizes, surface characteristics, and phosphate adsorption properties were fabricated. Results indicate that Zr(3)Al(10) and Ce(3)Al(10) nanoparticles exhibit optimal phosphate adsorption properties among Zr-Al binary oxide variants and Ce-Al binary oxide counterparts, respectively. Kinetic data conform to the pseudo-second-order model for phosphate adsorption on Zr(3)Al(10) and Ce(3)Al(10), while equilibrium adsorption isotherms align with the Langmuir model. Phosphate adsorption capacities reached 83 mg/g for Zr(3)Al(10) and 210 mg/g for Ce(3)Al(10), positioning them as potent adsorbents. Coexisting anions minimally influence phosphate adsorption on Zr(3)Al(10) and Ce(3)Al(10) nanoparticles, indicating high selectivity towards phosphate, whereas Ca 2+ and Mg 2+ ions notably enhance phosphate adsorption. Mechanistically, phosphate adsorption on both nanoparticles follows electrostatic attraction, ligand exchange, and inner-sphere complexation, with surface-OH groups playing a pivotal role. Leveraging the advantageous properties of their parent materials, Zr-Al and Ce-Al binary oxide adsorbents exhibit synergistic effects, enhancing their potential for phosphate removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Mingbo Shi,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
A universal strategy is developed to construct a superhydrophobic and superoleophilic metal-organic framework (MOF) by an amidation reaction between amino group and acid chloride of octadecanoyl chloride. The introduction of long alkyl chain reduced the surface free energy, yielding a superhydrophobic Zr-MOF (UiO-66-NH-C18) with a high water contact angle (WCA) of 151.7°. The adsorbed amount of water on the UiO-66-NH-C18 was only 5.59 mmol/g, which was just 28 % of that on the UiO-66-NH 2 . More importantly, the hydrophobic modification improved the stability of Zr-MOFs under strong alkaline conditions (e.g., pH = 13). Furthermore, the UiO-66-NH-C18 can selectively absorb organic solvent from water and achieve continuous oil-water separation. The oil-water separation efficiency could reach up to 99.9 %. In addition, the UiO-66-NH-C18@sponge was also prepared through dip-coating of UiO-66-NH-C18 on the melamine sponge in the presence of PDMS solution. The resulting composite shows high adsorption capacities for various oils and organic solvents ranging from 32.3–66.1 g/g. The superhydrophobic UiO-66-NH-C18@sponge has potential as a promising absorbent for treatment of oily wastewater.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Rongbo Li,Zemin Li,Yuqi Zhu,Yichang Pan,Rujing Hou
The separation of benzene/cyclohexane (BZ/CHX) represents a critical yet challenging task in the chemical industry, as their nearly identical boiling points and kinetic diameters render conventional distillation highly energy-intensive. Pervaporation, driven by a transmembrane pressure difference, offers an energy-efficient alternative by breaking the azeotropic equilibrium of BZ/CHX mixtures. Metal–organic framework (MOF) membranes have emerged as promising candidates for such separations owing to their exceptional structural tunability. However, their application in this context remains largely unexplored. Herein, we report a dual-ligand engineering strategy to fabricate UiO-66-CDC MOF membranes, wherein a cubic alkane ligand is incorporated into a planar parent ligand to create a dual-ligand-modified framework. This approach enables precise regulation of the pore microenvironment and enhances preferential adsorption and recognition of aromatic benzene over aliphatic cyclohexane through multiple interactions (C···C, H···C, C–H···π, C–H···O, and π···π). Consequently, under a single-stage operation with an equimolar (50:50) BZ/CHX feed, the optimized membrane delivered a permeation flux of 478 g m −2 h −1 and a separation factor of 5.8, corresponding to a 40% increase in flux and an 81% increase in separation factor, respectively, over the control membrane, and yielding a 110% higher PSI. When further applied to a two-stage membrane separation process, the total flux and separation factor reached 1747 g m −2 h −1 and 40.7, respectively, demonstrating the potential of process intensification. This dual-ligand design offers fundamental guidance for the development of advanced separation membranes targeting diverse aromatic/alkane mixtures.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yijing Zhang,Si Sun,Ming Wang,Yaling Han,Xuan Luo,Shenzhen Cong,Tao He,Huan Pang
Membranes featuring structural stability and precise ion selectivity are indispensable for efficient lithium recovery from magnesium-rich brines. Despite the promising potential of metal-organic framework (MOF) membranes in ion separation, the flexibility of aromatic linkers in conventional MOF structures often induces pore size fluctuations, which compromises size-based discrimination efficiency. Herein, defect-free Zr-Frustrated Trigonal-symmetry Rotor (Zr-FTR) membranes were fabricated on polyethylene terephthalate (PET) substrates via a counter-diffusion interfacial growth method. The Zr-FTR framework is constructed with bicyclopentane linkers, whose rigid geometric configuration and substantial torsional energy barriers ensure the retention of a fixed pore aperture (∼4.3 Å). This rigid confinement effect significantly suppresses transient pore expansion, enabling effective ion size sieving while retaining exceptional structural stability. The optimized Zr-FTR-24 membrane exhibits a high Li + permeability of 0.09 mol m −2 h −1 and a Li + /Mg 2+ selectivity of 235, with sustained performance stability over a 7-day continuous operation in mixed-ion solutions. This work establishes a novel design paradigm for suppressing linker dynamics in MOF membranes through rigid linker engineering, ultimately achieving structurally stable and size-exclusive ion transport.
✓ 已验证
产品关联
DOI
高影响因子
TURKISH JOURNAL OF CHEMISTRY
·
2022
·Vol. 45
·期 4
·1133-1145
·
IF 1.151
WANG DING-KAI,ZHAO WEI,CUI MING-YU,GUO TIAN-TIAN,FU SHUI-YUAN,LI WEI-GANG
A series of Zr(SO4)2/SiO2 solid acid catalysts with different Zr(SO4)2 loadings were prepared by water-soluble-impregnation method at room temperature. Then, the prepared catalysts were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectrum, X-ray diffraction, adsorption/desorption of N2, and temperature-programmed desorption of NH3. The results showed that the active component Zr(SO4)2 was successfully adhered to the mesoporous SiO2, and the acid amount of Zr(SO4)2/SiO2 increased with the increasing of the Zr(SO4)2 loadings. Finally, the wheat stalk was used as raw material and depolymerized over Zr(SO4)2/SiO2 to produce ethyl levulinate (EL). The reaction mixture was separated and purified by filtration and vacuum distillation. The kinetic characteristics and the reaction pathway were also studied. A comparative study showed that 20 wt.% Zr(SO4)2/SiO2 exhibited higher catalytic activity. When reaction temperature, time, catalyst dosage and Zr(SO4)2 loadings were 190 °C, 50 min, 20 wt.% and 30 wt.%, the EL yield reached a maximum of 17.14%. The relative content of EL exceeded 90% after three steps of distillation.
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2026
·
IF 16.6
Zhaomin Su,Yuhang Song,Yibin Jiang,Cheng Wang
Metal nanoparticles supported on metal–organic frameworks (MOFs) can form either within the internal pore network or on the external crystal surface, creating distinct catalytic environments. Although both configurations are widely reported, nanoparticle spatial localization is typically treated as an empirical outcome rather than a predictable material property. Here, we investigate nanoparticle localization in Zr-based MOFs using a controlled double-solvent method to introduce metal precursors into the pore system. An experimental data set spanning 10 transition metals across 11 Zr-based MOFs was constructed, and nanoparticle positions were classified by transmission electron microscopy based on the presence or absence of detectable particles on external crystal surfaces. Combining metal descriptors describing framework affinity and surface mobility with a low-dimensional representation of MOF host chemistry, we identify a compact descriptor space that separates internal confinement from external nanoparticle formation. The resulting model reveals a localization boundary governed by the balance between metal affinity toward oxygen-containing nodes, metal mobility on π-conjugated linker environments, and linker heteroatom chemistry. External validation using previously unseen MOFs confirms the predictive capability of the model. These results establish nanoparticle spatial localization in MOF-supported catalysts as a predictable outcome determined by metal–framework interactions, guiding the control of nanoparticle position in porous catalytic materials.
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuanyuan Zhang,Jin Xu,Qi Cheng,Zuyao Fu,Jing Xie,Zhaoyang Ding
Capsaicin serves as a specific marker for the identification of gutter oil. High-performance liquid chromatography (HPLC) is usually used to detect the capsaicin which is time-consuming and often fails to meet the detection requirements. Hence, establishing precise and swift methods for capsaicin detection is essential to safeguard food safety. In this study, a ratiometric fluorescence aptasensor (Zr-MOF@Apt) based on a zirconium-based nanoflower metal-organic framework (Zr-MOF) was innovatively constructed through the Zr-O-P bond for the high-sensitivity and high-selectivity detection of capsaicin. This aptasensor integrates the intrinsic advantages of both Zr-MOF and nucleic acid aptamers. The binding affinity of the Zr-MOF@Apt aptasensor for capsaicin was determined by isothermal titration calorimetry (ITC) experiment, with a Kd value of 111 ± 25.9 nM. The affinity of the aptasensor to capsaicin was much higher than that of free nucleic acid aptamers. Between 0.5 and 120 ng·mL −1 , the Zr-MOF@Apt aptasensor exhibited excellent linearity and a detection limit as low as 1.34 ng·mL −1 , achieving sensitive detection of capsaicin. This aptasensor has a low detection limit, high sensitivity and good stability, providing an important tool for accurately detecting harmful substances in food.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Xinyu Tang,Liangquan Lu,Hua Zhang,Xiaojie Sun,Bin Dong,Mingxin Bin,Jianhong Bi,Pengfei Yang
A magnetic Fe 3 O 4 -EDTA@Zr-MOF composite was successfully synthesized and characterized. • The maximum adsorption capacity for chlortetracycline reached 268.10 mg/g. • The adsorbent retained around 80% removal efficiency after six regeneration cycles. The long-term accumulation and serious pollution of chlortetracycline in the environment have emerged as a global pollution concern, posing a serious threat to ecosystems and public health. To overcome the limitations of traditional adsorbents, including low adsorption capacity, poor selectivity and limited regenerative properties, this study synthesized a composite material Fe 3 O 4 -EDTA@Zr-MOF that combines magnetic separation and ligand functionality by the hydrothermal method for CTC adsorption. Successful synthesis was verified by structural characterization, including FTIR and XRD. The adsorption kinetics were well described by the PSO model, suggesting that active-site-controlled surface interactions played an important role in CTC uptake. Thermodynamic analysis showed ΔG 0 < 0 and ΔH 0 > 0, indicating a spontaneous and endothermic process. The adsorption isotherms fitted the Langmuir model well, with a maximum theoretical capacity (q max ) of 268.10 mg/g. Circulation experiments show that the adsorption capacity of the material was still around 80% after 6 cycles. Fe 3 O 4 -EDTA@Zr-MOF combines high adsorption efficiency with easy magnetic recovery and good reusability, providing a potential solution for the treatment of tetracycline antibiotics in aquatic environments. Download: Download high-res image (122KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
·
2017
·Vol. 38
·期 1
·30-36
·
IF 0.938
Sun W. Z.,Cheng J. G.,Huang Z. K.,Jiang Y.,Wu L. E.,Liu L. M.
The present work determined the phase relations in Si-Al-M-O-C (M = Zr, Mg) systems, involving SiC-Al 2 O 3 -ZrO 2 , SiC-Al 2 O 3 -MgO, SiC-SiO 2 -Al 2 O 3 -ZrO 2 and SiC-SiO 2 -Al 2 O 3 -MgO systems by XRD phase analyses of the solid-state reacted samples from powder mixtures of SiC, Al 2 O 3 , ZrO 2 , MgO and SiO 2 . Within these systems, SiC was respectively compatible with other neighboring phases, forming a set of four-phase compatibility tetrahedrons. The subsolidus phase diagrams of the SiC-SiO 2 -Al 2 O 3 -ZrO 2 and SiC-SiO 2 -Al 2 O 3 -MgO quaternary systems were presented.
研究领域:
材料科学
·
陶瓷学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 23
·17601-17605
·
IF 3.84
Yueyue Tan,Wei Zhang,Yilong Gao,Jianxiang Wu,Bohejin Tang
Metal organic frameworks (MOFs), a kind of crystalline porous material, have attracted much attention due to their high surface area and controllable porous structure. In this paper, we present a new synthesis of Zr-based MOFs with high electrochemical performance by a facile synthetic method of changing the reaction temperature and stirring condition. By varying the reaction temperature, different particle sizes and degrees of crystallization can be obtained. This paper focuses on the electrochemical properties of Zr-based MOFs as electrode materials in supercapacitors. The maximum specific capacitance of Zr-MOF1 obtained at 50 °C can reach up to 1144 F g−1 at a scan rate of 5 mV s−1, which is far higher than Zr-MOF2 (811 F g−1), Zr-MOF3 (517 F g−1) and Zr-MOF4(207 F g−1). The results of electrochemical measurements show that the Zr-MOF1 we synthesized has excellent capacitance performance and good cycling stability over 2000 cycles, which makes it a promising supercapacitor electrode material.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）