TALANTA
·
2017
·
IF 4.162
Yun Lei,Beibei Chen,Linna You,Man He,Bin Hu
Polydimethylsiloxane (PDMS)/MIL-100(Fe) coated stir bar was prepared by sol gel technique, and good preparation reproducibility was achieved with relative standard deviations (RSDs) ranging from 2.6% to 7.5% (n=7) and 3.6% to 10.8% (n=7) for bar-to-bar and batch-to-batch, respectively. Compared with commercial PDMS coated stir bar (Gerstel) and PEG coated stir bar (Gerstel), the prepared PDMS/MIL-100(Fe) stir bar showed better extraction efficiency for target triazines compounds. It also exhibited relatively fast extraction/desorption kinetics and long lifespan. Based on it, a method of PDMS/MIL-100(Fe) coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for the determination of six triazines (simazine, atrazine , prometon , ametryn , prometryne and prebane) in environmental water samples. Several parameters affecting SBSE of six target triazines including extraction time, stirring rate, sample pH, ionic strength , desorption solvent and desorption time were investigated. Under the optimal experimental conditions, the limits of detection (LODs, S/N=3) were found to be in the range of 0.021–0.079 μg L −1 . The repeatability RSDs were in the range of 2.3–6.3% (n=7, c=0.5 μg L −1 ) and the enrichment factors (EFs) ranged from 51.1 to 102-fold (theoretical EF was 200-fold). The proposed method was applied to the analysis of target triazines in environmental water samples, with recoveries of 98.0–118% and 94.0–107% for spiked East Lake water and local pond water samples, respectively.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 113
·112502-112511
·
IF 3.289
Jiumei Wang,Jinquan Wan,Yongwen Ma,Yan Wang,Mengjie Pu,Zeyu Guan
MIL-88A was synthesized in diverse preparation conditions and characterized by various techniques. The catalytic performance of MIL-88A series for degrading Orange gelb (OG) through persulfate activation were also tested at temperature of 25 °C and the results were shown in the following sequence: 85 °C/2 h > 65 °C/2 h > 105 °C/2 h > 65 °C/6 h > 65 °C/12 h. MIL-88A produced at the synthesis temperature of 85 °C and in the crystallization time of 2 h (85 °C/2 h) was the best one with a removal rate of 96.4% mainly due to high SBET and much greater leach-out of Fe. An optimal dosage (0.3 g L−1) for MIL-88A in the MIL-88A/PS/OG system exists because of inhibition and promotion by fumaric acid. The filtrate experiment indicated that the catalytic activation involved heterogeneous reactions on the surface of the catalyst and homogeneous reactions in solutions. But the heterogeneous reaction occupied the principal position and the probable mechanism was obtained. Moreover, only solution pH < 4 could show a high degradation effect without the help of temperature. Comparing two different methods in the recycling experiment, the removal rate of OG decreased after the fourth run in both. Loss of active catalytic sites for Fe(III) in MIL-88A in the process of separating and sampling was responsible for activity decay.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinqi Luan,Xuehui Jia,Syed Jalil Shah,Jingyu Bao,Shunxiang Qin,Ruimeng Wang,Jiguang Deng,Zhongxing Zhao,Zhenxia Zhao
Low adsorption efficiency and secondary pollution release pose a bottleneck for the efficient capture of radioactive iodine vapor during nuclear utilization via adsorption. In addition, the simultaneous adsorption of iodine vapor alongside other harmful vapors in complex systems has been rarely reported. In this work, an electron/H-donating defective pore construction strategy involving MIL-101 modification via amino acids (AAs) was proposed to enhance its simultaneous adsorption efficiency for iodine and formaldehyde vapors. These defective microenvironments possessed microporous property with 11.3 Å, which not only formed strong affinity for I 2 molecules itself but also enhanced its adsorption interaction towards polyiodide anion (I 3 - and I 5 - ) through electron donation of AAs. Moreover, these adsorbed polyiodide anions and AAs-SL within the MOFs, resulting in multisite capture of FA via NH…O-H…I hydrogen bonding. The results revealed that AAs coordinated MIL-101 exhibited superior removal rate ( k 80% = 0.61–1.15 g g −1 h −1 ) for iodine vapor than that of the original MIL-101, which was 3.6–30.8 times higher that of state-of-the-art adsorbents under similar conditions. Notably, a high-capacity superior retention rate of 94.8 % was achieved for its I 2 adsorption after exposure to air for 7 days. After adsorption of iodine, AAs coordinated MIL-101 retained high FA adsorption capacity up to 9.7–12.9 mg/g, representing 75.1 %–87.7 % of the original AAs@MIL adsorption capacity for FA. This defective engineering strategy in MOFs supplied an efficient method for removing multiple harmful gases from the surrounding nuclear waste atmosphere.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Kashif Nawaz Khattak,Maosen Zhang,Caixia Deng,Shuang Li,Ling Jiang,Pran Gopal Karmaker,Xiupei Yang
In this work, the hybrid material NH 2 -MIL-125(Ti)@TpPa-NO 2 was synthesized by grafting an amino-functionalized titanium-based metal–organic framework (NH 2 -MIL-125(Ti)) with 2,4,6-tri(4-pyridyl)-1,3,5-triazine-nitro (TpPa-NO 2 ) moieties. The resulting composite material exhibited remarkable removal efficiency owing to the synergistic effects derived from the combination of the NH 2 -MIL-125(Ti) and TpPa-NO 2 components. The material demonstrated excellent stability and recyclability, making it a promising candidate for the treatment of wastewater containing rhodamine-B (Rhd-B). Some characterization techniques were employed to elucidate the structural features and surface morphology of the hybrid material. The adsorption capacity of NH 2 -MIL-125(Ti)@TpPa-NO 2 for Rhd-B dye was evaluated, and the results revealed an exceptional removal efficiency of 99.96 % and a high adsorption capacity of 25.54 mg/g, highlighting the superior adsorption performance of the material. The adsorption process was found to follow Langmuir isotherm and pseudo-second-order kinetics, indicating that chemisorption is the predominant mechanism governing the uptake of Rhd-B dye onto NH 2 -MIL-125(Ti)@TpPa-NO 2 .
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Peixun Yang,Senwei Jiang,Zhen Wu,Daodong Pan,Hangzhen Lan
Metal-organic frameworks (MOFs) hold significant potential for sample preparation, but single-MOF materials often face limitations in selectivity and extraction efficiency. To overcome these, a mesoporous MIL-53(Al)–NH 2 @UiO-66 composites with a core–shell structure was synthesized using an epitaxial growth strategy. This composite leverages the complementary properties of both MOFs, offering enhanced active sites and interaction forces for analytes. The structure and integration of the composite were characterized using Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction, confirming their successful integration. To address the challenge of detecting alkylphenols (APs) in food matrices, known for their endocrine-disrupting properties and low concentrations, a new solid-phase microextraction (SPME) Arrow was fabricated using the MIL-53(Al)–NH 2 @UiO-66 composite combined with polyacrylonitrile as a binder. APs were detected using ultra-performance liquid chromatography and quadrupole time-of-flight tandem mass spectrometry (UPLC-ESI-Q-ToF/MS). The developed SPME Arrow-UPLC-ESI-Q-ToF/MS method exhibits good linearity (R 2 ≥ 0.9958), wide linear range (0.01–1000 μg L –1 ), and high sensitivity (limits of detection ranging from 0.005 to 0.01 μg L –1 ) for APs determination. This method was validated for determining nine APs in milk samples from various packing materials, with spiked recoveries ranging from 85.2 % to 115 % and relative standard deviations from 3.4 % to 13.6 %. This study demonstrates the potential of MOF-on-MOF composites in enhancing the performance of adsorbents for SPME pretreatment, offering a promising approach for improving analytical methodologies in food safety.
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Energy Storage Materials
·
2024
·
IF 18.9
Zhenyu Fu,Yuhan Li,You Zhou,Weiya Zhang,Lirong Huang,Ling Weng
Lithium metal batteries have potentially high energy density, but severe uncontrolled lithium dendrites and unstable side reactions prevent large-scale applications. Serial three-dimensional porous poly (vinylidene fluoride) and copolymer membrane-based composite gel electrolytes are designed by introducing MIL-125 (Ti) and ethylene carbonate. Abundant lithium-ion transportation channels and homogeneous ion transport microregion are provided the new type porous fluoropolymer substrate. We also find that crystalline phase and dielectric properties of serial polymer membrane have significant impact on electrochemical performance for composite gel electrolytes. The mechanical and dielectric property of composite electrolyte enhanced by incorporating uniform and well distribution MIL-125 (Ti), which improve the electrolyte/electrode interface charge distribution and promote uniform lithium deposition, leading to lithium dendrite suppression. MIL-125 (Ti)/P(VDF-TrFE-CTFE) composite membrane shows the enhanced maximum strain of 181%, thermal stability (188°C) and corresponding composite gel electrolyte reflects higher ionic conductivity of 1.7 × 10 -3 S cm -1 and wider electrochemical window at room temperature than PVDF and PVDF-HFP composite electrolytes. Expectedly, quasi-solid state lithium metal battery of MIL-125 (Ti)/P(VDF-TrFE-CTFE) composite gel electrolyte exhibits higher discharge capacity (152.8 mAh g -1 ) at 240th cycle and 1 C, longer cycling life and better rate performance under large current density than PVDF and PVDF-HFP composite electrolytes.
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yong Zhang,Jing Wang,Fubin Liu,Litao Wang,Guihua Gao
This study describes the preparation of a cylindrical polymer foam column termed Chitosan/β-Cyclodextrin/MIL-68(Al) (CS/β-CD/MIL-68(Al)). An ice template-freeze drying technique was employed to prepare the CS/β-CD/MIL-68(Al) foam column by embedding MIL-68(Al) in a polymer matrix comprising cross-linked chitosan (CS) and β-cyclodextrin (β-CD). The cylindrical CS/β-CD/MIL-68(Al) foam was subsequently inserted into a syringe to develop a solid phase extraction (SPE) device. Without the requirement for an external force, the sample solution passed easily through the SPE column thanks to the porous structure of the CS/β-CD/MIL-68(Al) foam column. Moreover, the CS/β-CD/MIL-68(Al) foam column was thought to be a superior absorbent for SPE since it included the adsorptive benefits of CS, β-CD, and MIL-68(Al). The SPE was utilized in conjunction with high-performance liquid chromatography to analyze six sulfonamides found in milk, urine, and water. With matrix effects ranging from 80.49 % to 104.9 % with RSD values of 0.4–14.0 %, the method showed high recoveries ranging from 80.6 to 107.4 % for water samples, 93.4–105.2 % for urine, and 87.4–100.9 % for milk. It also demonstrated good linearity in the range of 10–258 ng·mL -1 with the limits of detection ranging from 1.88 to 2.58 ng·mL -1 . The cylindrical CS/β-CD/MIL-68(Al) foam column prepared in this work offered several advantages, including its simple fabrication, excellent water stability, absence of pollutants, biodegradability, and reusability. It is particularly well-suited for SPE. Furthermore, the developed SPE method, employing CS/β-CD/MIL-68(Al) foam column, is straightforward and precise, and its benefits, including affordability, ease of preparation, lack of specialized equipment, and solvent economy, underline its broad applicability for the pretreatment of aqueous samples.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Siqi Wei,Renjie Li,Ling Li,Dan Huang,Li Wu,Xiandeng Hou
The development of a rapid and accurate assay for the detection of biothiols is critical for early diagnosis and prevention of diseases. Herein, we report that the preparation of photoinduced defective MIL-100-NH 2 (PID-MIL-100-NH 2 ) with oxygen vacancy defects as a surface-enhanced Raman scattering (SERS) substrate by high-energy light irradiation. The substrate exhibited excellent SERS activity to Cys, Hcy and GSH with limits of detection (LODs) as low as 30, 23 and 18 nM, respectively, notably lowering the detectable concentration by at least 10 5 times compared to the Au NP substrate. Such superior SERS activity is attributed to the energy level matching of the PID-MIL-100-NH 2 substrate and the biothiol molecules, which results in efficient multiple charge-transfer resonances, such as photoinduced charge-transfer (PICT), ground-state charge-transfer (GSCT), and exciton resonances. Making good use of the rich fingerprint information, selective identification and simultaneous quantitation of biothiols in complex biological environment can be achieved. Trace biothiols in human serum samples have been successfully determined using this method. This work provides a feasible strategy to construct efficient charge-transfer resonances, enabling high-performance direct SERS sensing of biological small molecules.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiepeng Zhao,Yifei Ma,Zijian Li,Zhaomin Tong,Mei Wang,Liantuan Xiao,Suotang Jia,Xuyuan Chen
This study presents the design of a composite photocatalyst that harnesses the combined effects of internal and external heterojunctions for enhanced performance. The internal heterojunction is achieved by annealing NH 2 -MIL-125(Ti) (NM) under an argon atmosphere, forming an N-doped C-coated anatase/rutile heterostructure (A-NM). By controlling the annealing temperature, the A-NM prepared at 650 °C (A 650 -NM) demonstrates superior photocatalytic CO 2 reduction capability, with an outstanding CO production rate of 0.25 μmol h −1 g −1 under a light intensity of 0.1 W cm −2 . An external heterojunction is then created by combining NM and A 650 -NM in an optimized ratio. At an optimal composite ratio of 9:1 (NM: A 650 -NM), the CO production rate reached 6.3 μmol h −1 g −1 , which is 3.5 times higher than NM and 25 times higher than A 650 -NM. Characterization and DFT analyses reveal that the improved performance stems from the internal heterojunction within A 650 -NM's TiO 2 crystal phases and the external heterojunction between NM and A 650 -NM, which enhanced charge separation and carrier mobility. The N-doped carbon layer further boosts charge carrier transfer efficiency. This work introduces a novel Metal–Organic Framework (MOF)-based photocatalyst for CO 2 reduction, offering valuable theoretical insights and practical strategies for optimizing its performance.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Rui Zhang,Lingqiao Hu,Zixi Li,Jingjing Hao
The special layered structure and narrow band gap of BiOI semiconductors lead to a high recombination rate of photogenerated electrons and holes. Therefore, it is compounded with the porous structure of the metal–organic backbone NH 2 -MIL-101(Fe) to form heterojunctions and provide more active sites. In this paper, NH 2 -MIL-101(Fe)/BiOI composites were successfully prepared by solvothermal method, which has a high specific surface area and adjustable pore size, which is conducive to the effective separation and transport of photogenerated electrons and holes, thereby improving the photocatalytic efficiency. The results of XRD, SEM, XPS and other characterization experiments show that NH 2 -MIL-101(Fe)/BiOI composites have been successfully prepared. Secondly, ultraviolet diffuse reflectance spectroscopy (UV–vis DRS) was used to test the light absorption performance of the composites, which confirmed that the materials had a larger visible light range. Through PL, EIS confirmed that the efficiency of photogenerated electron and hole separation was further improved. In addition, the M–S curves of NH 2 -MIL-101(Fe) and BiOI were tested to calculate the valence and conduction band values of the material. Combined with the results of free radical trapping experiments, O 2 − and h + play a major role in the degradation of tetracyclines and can be degraded into CO 2 and H 2 O. The Z-type electron transfer mechanism of the composites is deduced, which can improve the separation rate of electrons and holes. In addition, the cyclic test verified that the composite material has good stability. When the tetracycline concentration was 30 mg/L, the degradation rate of the 10 % NH 2 -MIL-101(Fe)/BiOI composite reached 93.3 %. Its materials also have certain potential application value in environmental treatment, energy conversion and other fields, especially for the treatment of pollutants in water bodies.
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Acta Biomaterialia
·
2025
·
IF 9.6
Pai Wang,Heshi Liu,Lei Guo,Yixin Tang,Tianwei Lan,Rui Zhou,Huiqing Xu,Lu Wang,Xue Wang,Baiqiao Chen,Yixing Wang,Siyuan Wang,Chang Liu,Jie Chen,Caina Xu,Quan Wang,Huayu Tian
Colorectal cancer (CRC) remains a major global health burden as the third most commonly diagnosed malignancy and the second leading cause of cancer-related mortality worldwide. While combination chemotherapy and immune agonists hold potential to overcome tumor heterogeneity through multi-pathway modulation, their therapeutic efficacy remains limited by off-target drug distribution and immunosuppressive tumor microenvironment (TME). To address this, we developed a tumor-targeted chemo-immunotherapy platform by encapsulating irinotecan (CPT-11) and resiquimod (R848) in hyaluronic acid (HA) coated MIL-100(Fe) metal-organic frameworks (CRMH NPs), enabling CD44-mediated delivery and synergistic anti-tumor responses. The system enabled controlled drug release in the acidic TME, promoting immunogenic cell death (ICD), inducing the cGAS-STING pathway and activating immune cells. In vitro , CRMH NPs induced significant ICD, as evidenced by the release of damage-associated molecular patterns (DAMPs) like high mobility group box 1 (HMGB1) and calreticulin (CRT), and matured dendritic cells (DCs), which triggered by TLR7 agonist, enhancing immune responses. It also activated the cGAS-STING pathway, which could efficiently induce the targeted cells to produce type I interferon (IFN) and proinflammatory cytokines, thereby enhancing T cell activation and recruitment. In vivo , CRMH NPs significantly reduced tumor growth in CT26 mouse models, activated innate immune signaling, and increased immune cell infiltration, demonstrating superior anti-tumor effects compared to free drugs and other nanoparticle formulations. Furthermore, CRMH NPs upregulated PD-L1 expression on tumor cells, suggesting potential synergy with immune checkpoint blockade therapy. Combining CRMH NPs with anti-PD-L1 therapy enhanced anti-tumor immunity, particularly in distant tumors, highlighting a promising approach to overcoming immune evasion and achieving durable tumor regression. These findings supported CRMH NPs as a versatile and effective platform for chemo-immunotherapy in CRC. Statement of Significance Colorectal cancer (CRC) remains a major global health challenge with limited treatment efficacy due to tumor heterogeneity and immunosuppression. This study introduces a novel tumor-targeted nanoparticle platform, CRMH NPs, which co-deliver the chemotherapeutic drug irinotecan (CPT-11) and the immune agonist resiquimod (R848) using hyaluronic acid-coated MIL-100(Fe) metal-organic frameworks. CRMH NPs enhance drug delivery, induce immunogenic cell death, and activate the cGAS-STING pathway, synergizing chemotherapy and immunotherapy. Demonstrating superior tumor suppression and immune activation in preclinical models, this platform overcomes key limitations of current therapies, such as off-target effects and immune evasion. Its combination with anti-PD-L1 therapy further improves outcomes, offering a promising strategy for durable CRC treatment. This work advances nanomedicine and immuno-oncology, providing a transformative approach for cancer therapy.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Ai-Hui Cao,Xin-Tai Su,Min Zhang,Qi-Long Zhu
Photocatalytic water decomposition is a cost-effective way to convert sustainable solar energy into chemical energy. While semiconductor photocatalysis has generated considerable interest in photocatalytic hydrogen evolution, it is hampered by fast electron–hole complexation and suboptimal efficiency. Herein, an NH2-MIL-101(Cr)/doped-C3N4 heterojunction possessing a static internal electric field (IEF) is successfully prepared, characterized, and assessed for photocatalytic hydrogen production. The optimized photocatalytic H2 evolution rate of the resultant NH2-MIL-101(Cr)/O–C3N4 is 460 μmol g–1 h–1 under visible light, with an AQY of 2.5% at 450 nm. Spectral evidence indicates that the static IEF facilitates rapid electron transfer from NH2-MIL-101(Cr) to O–C3N4, achieving efficient photogenerated charge separation and a consequent significant enhancement in catalytic activity. This work not only presents a case of construction of an IEF through assembling NH2-MIL-101(Cr) with O–C3N4 but also deepens the insight of the rudimentary mechanisms of the static IEF in heterojunctions for photocatalytic hydrogen evolution.
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