JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Hanlin Li,Shuangqin Tian,Xin Wang,Yujing Long,Tianhong Ye,Lihong Tang
When used individually, ZIF-8 suffers from hydrolysis in aqueous media, while CAU-17 is limited by its low specific surface area (64.71 m²/g). Therefore, we employed an in situ self-assembly strategy to construct a MOF-on-MOF heterostructure (CAU-17@ZIF-8) for the synergistic removal of Cd(II) and methylene blue (MB). The composite achieved maximum adsorption capacities of 607.65 mg/g for Cd(II) and 1025.38 mg/g for MB, with a 99% removal efficiency for low-concentration pollutants in real wastewater. Even after five cycles, 75% efficiency was maintained. Mechanistic studies combining batch experiments, characterization, and DFT calculations revealed that the heterojunction interface promotes substantial charge transfer from CAU-17 to ZIF-8, significantly enhancing electrostatic attraction toward cations. Simultaneously, new mesopores formed at the interface increase the specific surface area (239.62 m 2 /g) and provide rapid mass-transfer channels. MB adsorption is governed by electrostatic attraction, hydrogen bonding, and π-π interactions, while Cd(II) adsorption relies on ion exchange, coordination, and electrostatic attraction. This work demonstrates that constructing MOF-on-MOF heterojunctions is a promising strategy to overcome the intrinsic limitations of single MOFs in water remediation, thereby greatly enhancing the adsorption capacity toward methylene blue (MB) and Cd(II).
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Simin Li,Sen Mu,Jie Ji,Fengbing Tang,Ning Chai,Jingbo Mu,Handan Zeng
Tetracycline hydrochloride (TCH), owing to its structural stability and resistance to degradation, has emerged as a typical persistent pollutant in aquatic environments. However, the development of effective and environmentally friendly strategies for the removal of TCH remains highly challenging, owing to limited pollutant enrichment and low catalyst activation efficiency. In this study, a quartz sand-supported ZIF-8 catalyst functionalized with chitosan-derived N-doped carbon (QN@ZIF-8) was rationally constructed: (1) π–π interactions enhanced the adsorption and enrichment of TCH molecules, thereby significantly increasing the probability of contact between pollutants and active sites and (2) its efficient electron transfer channels accelerated the activation of peroxymonosulfate (PMS), facilitating the directional generation of superoxide radicals (•O 2 − ) and singlet oxygen ( 1 O 2 ), thus strengthening the synergistic pathways of both radical and non-radical degradation. Experimental results demonstrated that under optimal conditions (catalyst dosage: 0.5 g/L, PMS: 0.2 g/L, pH ≈ 5.1), QN@ZIF-8 achieved an efficient removal of 90.5% of TCH within 40 min, with an apparent pseudo-first-order rate constant of k = 0.0393 min −1 , which was 2.1 times higher than that of pristine quartz sand. Moreover, the catalyst maintained a removal efficiency above 82.3% after five consecutive cycles and exhibited stable performance in tap water and simulated seawater. Liquid chromatography-mass spectrometry (LC-MS) revealed three predominant TCH degradation pathways. This study not only elucidates the π-system-driven synergistic catalytic mechanism but also offers new insights into material design and theoretical guidance for the efficient remediation of recalcitrant organic pollutants
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Yuze Jiao,Zeyuan Li,Haoyu Zheng,Huiqi Jiangjia,Hui Yang,Qilong Zhang
The thermally conductive functional material ZIF-8/BN was co-loaded onto the fiber via electrostatic self-assembly. • The effects of stabilization heat treatment on the morphology and properties of the reinforcement were investigated. • The roles of uniform ZIF-8 and ZIF-8/BN nanoparticles loaded at the resin-reinforcement interface were analyzed. • Composites obtained solely via reinforcement functionalization showed excellent thermal expansion and thermal conductivity. Polytetrafluoroethylene (PTFE) is widely used in high-frequency substrate materials due to its favorable dielectric constant and excellent thermal stability. However, its high coefficient of thermal expansion (CTE) and low thermal conductivity cause some processing challenges. Herein, we report a modified reinforcement, designated ZIF-8/BN@GF (ZB@G), which was fabricated by electrostatically assembling thermally conductive BN (boron nitride) with the metal-organic framework (MOF), followed by in-situ growth onto glass fibers (GF) through an impregnation process. Thermal stabilization was found to markedly enhance the structural compactness and moisture resistance of the fibers during processing. The rough surface morphology of the MOF facilitates mechanical interlocking and resin infiltration into its porous structure, thereby strengthening the interfacial bonding between the reinforcement and the resin matrix and consequently improving the dimensional stability of the composites. Moreover, the uniform distribution of flat BN nanosheets along the fiber surface serves to regulate interfacial interactions, establish oriented thermal conduction pathways, and simultaneously tailor the thermal expansion behavior. As a result, the resulting PTFE composites exhibit a suitable in-plane CTE parallel to the reinforcement of 16.97 ppm/°C and a maximum thermal conductivity of 1.481 W·m −1 ·K −1 . In addition, they retain excellent dielectric properties, achieving a low dielectric constant of 2.39 and a low dielectric loss of 0.00145 at 10 GHz. This work demonstrates that a straightforward in-situ loading of nano-functional materials onto reinforcements can concurrently deliver substantial improvements in thermal conductivity and mechanical performance, providing a promising strategy for the selection of reinforcements in next-generation high-frequency substrate materials. Download: Download high-res image (155KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiao Zhang,Qi Yu,Jingmiao Zhou,Bin Luo,Jie Li,Rong Gao,Mengdan Li,Bo Cui,Jing Chen
Oil spills and oily wastewater pose severe threats to marine ecosystems and public health, necessitating the development of materials capable of high-performance and durable separation. Herein, a dopamine-based three-in-one strategy was employed to form a zeolitic imidazolate framework-8 (ZIF-8)/reduced graphene oxide (RGO) nanocoating in situ on the surface of polyurethane (ZRP) foam, thereby synthesizing a composite foam with a layered structure. The ZRP foam exhibits excellent hydrophobic/oleophilic properties, with an adsorption capacity for organic solvents as high as 98.76 g/g. Under gravity, the foam achieves an oil-water separation efficiency of 99.2% while effectively repelling water. For surfactant-stabilized water-in-oil emulsions, the compressed ZRP foam shows a separation efficiency of 99.8% and a flux of 664 L·m −2 ·h −1 . The material retains over 97% of its initial absorption capacity after 100 adsorption-desorption cycles and maintains structural and functional stability under harsh chemical (pH 5–14), thermal (−30 °C to 100 °C), and mechanical (compression, torsion, abrasion) conditions. Furthermore, the ZRP foam demonstrates remarkable photothermal conversion capability, which significantly reduces the viscosity of heavy oils under illumination and thereby enhances separation efficiency, including solar-assisted recovery of crude oil. This study offers a robust and sustainable strategy for oil-water separation and environmental remediation in oilfields.
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Biosensors-Basel
·
2022
·Vol. 12
·期 11
·1049
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IF 5.743
Guo-Ying Chen,Shi-Jun Yin,Li Chen,Xi Zhou,Feng-Qing Yang
In this study, the alkaline phosphatase (ALP)-like activity of zeolitic-imidazolate framework-8 (ZIF-8) is reported for the first time. Then, colorimetric sensors for the ascorbic acid oxidase (AAO) and copper ion (Cu2+) detection were developed based on the acetylcholinesterase (AChE)- and ALP-like activities of ZIF-8. The ZIF-8 has good mimetic enzyme activity and exhibits high affinity to the substrates. Its AChE- and ALP-like activities also have good reusability and storage stability. Good linear dependences are obtained in the range of 1.3−250.0 μM (AChE-like activity-based) and 4.5−454.5 μM (ALP-like activity based) for Cu2+detection. Furthermore, good linear dependence is also obtained based on the ALP-like activity of ZIF-8 for AAO detection in the range of 2.3−454.5 U/L. Their limits of detection (LODs) are calculated to be 0.7 µM, 2.8 µM, and 1.8 U/L, respectively. Finally, the sample spiked recoveries of Cu2+in tap water, Cu2+, and AAO in human serum and rabbit plasma were measured, and the results are in the range of 80.0−119.3%. In short, the preparation of ZIF-8 is simple, environmentally friendly, and harmless, and can realize highly selective detection of AAO and Cu2+in an efficient and fast process.Keywords:alkaline phosphatase;acetylcholinesterase;ascorbic acid oxidase;copper ion;zeolitic imidazolate framework-8;colorimetric detection
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高影响因子
MICROCHEMICAL JOURNAL
·
2022
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IF 5.304
Linzhi Li,Xing Liu,Benchao Su,Huiyin Zhang,Rui Li,Zilong Liu,Qi Chen,Tianzeng Huang,Hongmei Cao
A novel electrochemical immunoassay based on nanobody heptamer for ultrasensitive detection of alpha fetoprotein (AFP) is proposed. First, AFP heptamer fusion protein (A1-C4bp α) is prepared via fusing the AFP-specific nanobody (A1) with the C-terminal fragment of C4-binding protein (C4bp α). Then A1-C4bp α heptamer with higher affinity is used as the molecule recognizing probe to capture numerous the AFP, increasing the sensitivity of the immunosensor. Moreover, AuNPs decorated zeolitic imidazolate framework ( [email protected] ) with large surface area, and abundant binding sites serves an ideal nanocarrier to increase heptamer loading. Multiwalled carbon nanotube (MWCNTs) with excellent electrical conductivity was immobilized on glassy carbon electrode (GCE) to enhance electrochemical signals. The coupling between the [email protected] @MWCNTs and heptamer technologies constructed an ultrasensitive and specific immunosensor for AFP detection in the range of 0.1 to 10 5 pg mL −1 with a lower detection limit of 0.033 pg mL −1 . The as-prepared electrochemical sensing exhibited excellent performance and could be employed to determine AFP with satisfactory results in actual serum samples, suggesting that the proposed strategy for nanobody multimerization provides an alternative scheme for enhancing sensitivity in important biomarkers detection.
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RARE METALS
·
2022
·Vol. 41
·期 8
·2745-2758
·
IF 6.318
Li Pu-Bo,Wang Yong-Xun,Shao Ze-Xi,Wu Bin-Tao,Li Heng,Gao Mang-Mang,Liu Kuan-Guan,Shi Ke-Ren
The Mg–Al layered double hydroxide (LDH) conversion coatings were first synthesized in situ to modify the AZ91D alloy through urea hydrolysis to adjust the pH values (9.4, 10.4, 11.2 and 11.4). The pH 11.2 Mg–Al LDH possessed the best compactness and good crystallinity compared to other in situ LDH coatings and obtained the lowest corrosion current density ( i corr ) of (2.884 × 10 −6 ± 0.345 × 10 −6 ) A·cm −2 , which was attributed to the anion-exchange reaction of LDH and the physical barrier against corrosion owing to the twisted penetration pathway of the interlaced LDH sheets. Core–shell structured Zn–Al LDH@ZIF-8 powder modified with stearic acid (SA) was further wrapped with polyvinylidene fluoride (PVDF) to prepare a hydrophobic double-layered coating on the underlying pH 11.2 Mg–Al LDH (SLLZ). The water contact angle (CA) of the SLLZ coating reached 105.6°, and its i corr decreased to (3.524 × 10 −7 ± 0.214 × 10 −7 ) A·cm −2 compared with a single pH 11.2 film. The SLLZ coating exhibited high durability and corrosion protection, even after 15 days of immersion in NaCl solution. The PVDF, SA and ZIF-8 nano-shells contributed to good hydrophobicity, effectively forming a physical barrier. The Zn–Al LDH core and underlying in situ Mg–Al LDH were beneficial for synergistically promoting anion-exchange reaction between the intercalated anions of LDH and chlorides in corrosive media. This work provides a promising approach that combines core–shell LDH@ZIF-8 with LDH film on a Mg alloy surface to construct a hydrophobic film with excellent long-term anti-corrosion performance. Graphical abstract
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高影响因子
ANALYTICA CHIMICA ACTA
·
2022
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IF 6.911
Xiao-Xue Jiang,Pan Li,Meng-Ya Zhao,Rui-Cong Chen,Zhen-Guang Wang,Jia-Xiu Xie,Yun-Kai Lv
Controllable encapsulation of sulfur quantum dots (SQDs) into metal-organic frameworks (ZIF-8) by a surface-bound zinc ion-induced growth strategy, and SQDs@ZIF-8 was successfully prepared for alkaline phosphatase (ALP) detection. The new synthesis procedure involves first binding Zn 2+ to the surface of SQDs to form SQDs/Zn, and then via zinc ion-induced in situ ZIF-8 growth to obtain SQDs@ZIF-8, which greatly improved the luminous efficiency of SQDs. The specific process of detecting ALP using pH-triggered fluorescence quenching of SQDs@ZIF-8: firstly ALP hydrolyzes 2-phosphate- l -ascorbic acid trisodium salt (AAP) to ascorbic acid (AA), and then the leakage of SQDs in the SQDs@ZIF-8 leads to a decrease in fluorescence intensity based on the destruction of ZIF-8 skeleton by H + released by AA. A linear relationship was obtained between the fluorescence intensity and the ALP concentration in the range of 0.15–50 U/L, and the detection limit was 0.044 U/L. Moreover, it was found that free SQDs can be complexed with Fe 2+ to produce wine red complexes, and the obtained UV absorbance and ALP concentration have a linear relationship in the range of 10–200 U/L. The detection range of ALP is significantly broadened based on the combination of the above two detection methods. Furthermore, SQDs@ZIF-8 exhibited excellent stability in water and was successfully applied to the fluorescence and colorimetric detection of ALP in human serum.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Song Duan,Xiuzhou Lin,Baojie Dou,Han Yang,Yingjun Zhang,Wilfred Emori,Xiulei Gao,Zhiwen Fang
In this study, ZIF-8 was used to modify fluorinated graphene (FG) to enhance its compatibility with epoxy resins (EP). Triton X-100 (TX-100) was innovatively used to modify the high F-content FG, enabling the surface to be loaded with large amounts of ZIF-8. SEM, XRD , FT-IR, TGA and XPS results confirmed the successful preparation of the FG@ZIF-8 (FZ). Compared to EP coating, the FG-modified epoxy coatings (FG/EP coatings) had improved corrosion resistance , mechanical properties and wear resistance, and especially long-term corrosion resistance by more than two orders of magnitude. However, the low compatibility of FG with the resin limited the efficient improvement of the corrosion resistance and mechanical properties of the FG/EP coatings. In contrast, the FZ/EP coatings achieved significant improvements in corrosion resistance, mechanical properties, and wear resistance, with the coatings displaying excellent corrosion resistance (|Z| 0.01 Hz close to 1.01 × 10 11 Ω·cm 2 ) after 10,000 h immersion. The high F content 3FZ(T)/EP coating modified by TX-100 also exhibited excellent wear resistance with a 98.3 % reduction in wear rate compared to the EP coating. The significant improvements in the performances of the FZ/EP coatings are attributed to the high compatibility of FZ with epoxy resins, the efficient physical barrier, and the ability of FZ to inhibit electron transport , as well as the high crosslink density of the FZ/EP coatings. This study provides a reference for the development of ultra-high corrosion and wear-resistant coatings.
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SYNTHETIC METALS
·
2021
·
IF 3.266
Yaoyao Hao,Yinyue Zhou,Nuohan Xu,Kaixun Tian,Pei Liang,He Jiang
Iron oxide @ poly(m-phenylenediamine) (Z) particles (Fe 3 O 4 @PmPD(Z)) were synthesized by in-situ polymerization of PmPD on the Fe 3 O 4 nanoparticles via ZIF-8 intermediate platform to remove Cr(VI) from wastewater. Analyses of FT-IR, TEM, etc. were performed to evaluate the morphology and structure of synthesized material, and the results confirmed the successful synthesis of Fe 3 O 4 @PmPD(Z). In addition, the TEM and BET analyses results show that the PmPD shell is a flocculating structure, and the increased specific surface area increases the contact with Cr(VI). The Fe 3 O 4 @PmPD(Z) exhibits much better Cr(VI) adsorption performance than Fe 3 O 4 @PmPD, and its adsorption capacity is increased by about 30%, the maximum Cr(VI) adsorption capacity can reach 371.75 mg g −1 at 318 K. According to FT-IR, XPS , and EDS , the removal mechanisms can be attributed to the redox reaction of Cr(Ⅵ) and NH to form N and Cr(Ⅲ), and N shares electron pair with Cr(Ⅲ) to form chelation. At the same time, the appearance of N + also contributes to the removal of Cr(Ⅵ) by generating electrostatic attraction with the negatively charged HCrO 4 - . Besides, the Fe 3 O 4 @PmPD(Z) also exhibits excellent properties of recovery and reuse. Therefore, the current work proves that Fe 3 O 4 @PmPD(Z) has the potential to remove heavy metals in wastewater.
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MOLECULES
·
2021
·Vol. 26
·期 17
·5209
·
IF 4.412
Li Du,Shaonan Xu,Han Wu,Tengwen Zhao,Xuesheng Wang,Manman Wang
A novel diatomite-supported zeolitic imidazolate framework-8 sorbent (ZIF-8@Dt-COOH) was in situ fabricated and developed for solid-phase extraction of three benzodiazepines (triazolam, midazolam and diazepam) in urine followed by high-performance liquid chromatography. ZIF-8@Dt-COOH was easily prepared by coating ZIF-8 on the surface of Dt-COOH and characterized by Fourier transform infrared spectra, X-ray powder diffractometry and scanning electron microscopy. Compared with bare Dt-COOH, the extraction efficiency of ZIF-8@Dt-COOH for the target was significantly increased from 20.1–39.0% to 100%. Main extraction parameters, including ionic strength and pH of solution, loading volume, washing solution, elution solvent and elution volume, were optimized in detail. Under optimum conditions, the developed method gave linearity of three BZDs in 2–500 ng/mL (r≥ 0.9995). Limits of detection (S/N= 3), and limits of quantification (S/N= 10) were 0.3–0.4 ng/mL and 1.0–1.3 ng/mL, respectively. In addition, the average recoveries at three spiked levels (5, 10 and 20 ng/mL) varied from 80.0% to 98.7%, with the intra-day and inter-day precisions of 1.4–5.2% and 1.5–8.2%, respectively. The proposed method provided an effective purification performance and gave the enrichment factors of 24.0–29.6. The proposed method was successfully employed for the accurate and sensitive determination of benzodiazepines in urine.Keywords:benzodiazepines;diatomite;zeolitic imidazolate framework-8;solid-phase extraction;urine
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Song Xiao,Xiangkang Cao,Zehua Dong,Xiaoze Ma,Xinxin Zhang,Guangyi Cai
Ce-based imidazole complex (Ce-IM/ZIF-8) nanoparticles (NPs) were fabricated by doping cerium ions (Ce 3+ /Ce 4+ ) in zeolite imidazolate framework-8 (ZIF-8) through a one-pot co-precipitation method. The stimuli-responsive release of Ce 3+ /Ce 4+ species from the Ce-IM/ZIF-8 NPs under acidic conditions was confirmed by UV–Vis spectroscopy. Electrochemical impedance spectroscopy and scanning electron microscope were applied to evaluate the corrosion inhibition efficiency of Ce-IM/ZIF-8 NPs on bare aluminum alloy , and it demonstrates that the released Ce 3+ /Ce 4+ , Zn 2+ ions and imidazole could absorb on the surface of Al alloy by chelating effect, forming a compact corrosion barrier on the Al substrate. Furthermore, the Ce-IM/ZIF-8 NPs were encapsulated into epoxy (EP) resin to obtain a composite coating , and it is found that when the NPs addition amount was 1 wt%, the EP-based composite coating exhibits excellent corrosion barrier and promising self-healing ability, with its impedance at 0.01 Hz maintaining 2.2 × 10 8 Ω·cm 2 even after 6 cycles of aging tests (720 h), which could be ascribed to the synergistic inhibition of released Ce ions and imidazole molecules on Al substrate beneath the defective coating.
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