MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 10
·1-11
·
IF 5.705
Tang Jing,Jiang Sixun,Liu Yu,Zheng Shengbiao,Bai Lei,Guo Jiahao,Wang Jianfei
A composite was prepared from a Co(II)-based zeolitic imidazolate framework (ZIF-67) and graphene oxide (GO) by an in situ growth method. The material was electrodeposited on a glassy carbon electrode (GCE). The modified GCE was used for the simultaneous voltammetric determination of dopamine (DA) and uric acid (UA), typically at working potentials of 0.11 and 0.25 V (vs. SCE). The morphology and structure of the nanocomposite were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The modified electrode exhibits excellent electroanalytical performance for DA and UA owing to the synergistic effect of the high electrical conductivity of GO and the porosity of ZIF-67. By applying differential pulse voltammetry, a linear response is found for DA in the 0.2 to 80 μM concentration range, and for UA between 0.8 and 200 μM, with detection limits of 50 and 100 nM (at S/ N = 3), respectively. Further studies were performed on the effect of potential interferents, and on electrode stability and reproducibility. The modified GCE was applied to the simultaneous detection of DA and UA in spiked human urine and gave satisfying recoveries.
Schematic of the preparation procedure of GO-ZIF67 and electrochemical reaction mechanisms of UA and DA at the GO-ZIF67-modified glassy carbon electrode (GCE). GO: graphene oxide; ZIF-67: Co(II)-based zeolitic imidazolate framework.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhihong Xuan,Wenjie Shen,Hongmei Liu,Baoxia Ni,Ziye Lian,Li Li,Jinnan Chen,Baoyuan Guo,Songxue Wang,Jin Ye
This study presents a novel approach toward the one-pot green synthesis of ZIF-8/IgG composite, focusing on its precise orientation and protection of the anti-aflatoxins antibody. The antibody orientation is achieved through the specific binding of IgG to the Fc region of the antibody, while the antibody protection is accomplished by the structural change restriction of ZIF-8 framework to the antibody. Consequently, the antibody exhibits enhanced target capability and significantly improved tolerance to organic solvents. The ZIF-8/IgG/anti-AFT was employed for the purification and detection of AFTs by coupling with UPLC. Under optimized conditions, the recoveries of spiked AFTs in peanut oils are between 86.1% and 106.4%, with relative standard deviations (RSDs) ranging from 0.8% to 8.8%. The linearity range is 0.5–20.0 ng for AFB 1 and AFG 1 , 0.125–5.0 ng for AFB 2 and AFG 2 , the limit of detection is 0.1 ng for AFB 1 and AFG 1 , 0.03 ng for AFB 2 and AFG 2 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yang Yu,Peng Li,Guohai Zheng,Liwei He,Dandan Ge,Zhehui Weng
A magnetic matrix solid phase dispersion (MSPD) method based on magnetic ZIF-8 (SDS@MZIF-8) and a deep eutectic solvent was developed and used to the extraction of crystal violet and rhodamine B in lake sediments. SDS@MZIF-8 was prepared and used as the extraction sorbent and dispersant in MSPD. The magnetic property of MZIF-8 facilitated the recovery of the extraction sorbent after the blending step. Hydrophilic deep eutectic solvents were prepared and used as efficient green dispersing solvents in MSPD. The use of magnetic sorbent in MSPD is simple and fast, eliminating some additional steps commonly used in the classical MSPD and shortening the extraction time. The parameters influencing the extraction efficiency were investigated and optimized. Under the optimized conditions, the intra- and inter-day relative standard deviations were less than 4.9 %. The linearity ranged from 2-400 µg g −1 with coefficients of determination higher than 0.9943. The detection and quantification limits of RB and CV varied between 0.3–0.5 μg g −1 and 1.0–1.8 μg g −1 , respectively. Finally, the developed method was applied to the analysis of RB and CV in the sediment samples. The recoveries ranged from 93.2 to 107.3 % and the relative standard deviations ranged from 0.8 to 4.9 %. The results suggest a high potential use of the proposed method to determine the organic pollutants in solid samples. Compared with the conventional MSPD extraction technique, the developed method considerably reduced the sample and solvent consumption, offering important environmental benefits.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Nan Yao,Shifeng Ji,Yunqing Xing,Jinchao Chen,Yanrui Cheng,Xiaonan Ruan,Jiaxin Chen,Zhuo Li,Yingjie Zhang,Chunmei Gao,Changbing Ye
This study reports the development and performance of a chlorine-resistant, negatively charged loose nanofiltration (LNF) membrane designed for efficient dye/salt separation from textile wastewater. The membrane was constructed by incorporating a synergistic composite of zeolitic imidazolate framework-L (ZIF-L) and polydopamine (PDA) into a polyamide layer on a polyethersulfone (PES) support via interfacial polymerization. In this design, ZIF-L nanosheets create a highly permeable, loose network, while PDA acts as a crucial molecular linker to ensure homogeneous dispersion and structural integration. Characterization using SEM, XRD, FTIR, XPS, and AFM confirmed successful synthesis. The optimal membrane, loaded with 2 wt% ZIF-L/PDA, exhibited superior performance: a pure water flux of 31.56 L·m −2 ·h −1 ·bar −1 , which is 3.19 times greater than the pristine Thin-Film Composite (TFC) membrane. This membrane achieved high dye rejection rates: Eriochrome Black T (99.25 %), Acid Chrome Blue K (97.87 %), Direct Blue 71 (97.56 %), Congo Red (94.09 %), and Direct Red 23 (93.92 %). Simultaneously, it showed low rejection for salts, indicating high permeability: NaCl (7.80 %), MgCl 2 (9.89 %), MgSO 4 (15.39 %), and Na 2 SO 4 (23.97 %). Crucially, the membrane demonstrated robust stability under diverse and harsh conditions, including exposure to strong acid, strong alkali, high pressure, and during long-term continuous operation, along with markedly enhanced chlorine resistance. Therefore, the ZIF-L/PDA loose NF membrane presents significant potential for dye wastewater treatment applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Xiaomeng Yu,Yuejun Ouyang,Jilan Long,Dan Xu,Guangming Liang,Zhiyuan Feng,Dongmei Pu,Qiwen Yong,Zhi-Hui Xie
Conventional nanoparticles incorporated into epoxy coatings suffer from poor compatibility and insufficient corrosion improvement, hindering their practical applications. A dual-strategy approach integrating in-situ host–guest nanoconfinement and surface self-assembly was devised to fabricate 8HQ@ZIF-8/PDA smart nanocontainers. The guest 8-hydroxyquinoline (8HQ) was encapsulated within the zeolitic imidazolate framework-8 (ZIF-8) host, leveraging nanoconfinement effects. A bioinspired polydopamine (PDA) layer was then self-assembled on the 8HQ@ZIF-8 surface through dopamine oxidative self-polymerization, resulting in a robust nanocontainer architecture. Density functional theory (DFT) calculations verify that the molecular interactions between the PDA and the ZIF-8 surface was the chemical adsorption. The resultant 8HQ@ZIF-8/PDA retained the rhombic dodecahedral morphology and crystallinity of ZIF-8, demonstrating controlled pH-responsive release behavior. When incorporated into an epoxy (EP) resin matrix on magnesium alloy, the 8HQ@ZIF-8/PDA/EP smart composite coatings exhibited outstanding interfacial compatibility and long-term stability, achieving a low-frequency impedance (| Z |₀.₀₁ Hz ) of 2.49 × 10⁷ Ω cm², a maximum phase angle of 82.8°, and a breakpoint frequency ( f b ) of 63.34 Hz after 50 days of immersion in a 3.5 wt% NaCl solution. These findings highlight the exceptional self-healing and corrosion-resistant properties of the 8HQ@ZIF-8/PDA/EP smart composite coatings, underscoring its potential for protecting magnesium alloys in aggressive environments.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 58
·49875-49888
·
IF 4.6
Yangyi Cai,Xiaocan Liu,Weiye Yang,Hongyan Peng,Lijian Meng,Shihua Zhao
Persistent organic pollutants pose significant long-term risks to environmental and human health due to their carcinogenic, mutagenic, and teratogenic properties. This study focuses on the efficient activation of peroxymonosulfate (PMS) through the rational design of a cobalt-based metal–organic framework (ZIF-67) catalyst, enabling rapid degradation of high-concentration dye pollutants. By optimizing the molar ratio of 2-methylimidazole (2-MeIM) to Co(NO3)2·6H2O and employing a hydrothermal synthesis method, we fabricated ZIF-67 (4 : 1) with high crystallinity, large specific surface area (1656.68 m2 g−1), and stable degradation performance. The ZIF-67 (4 : 1)/PMS system achieved complete degradation of 20 mg L−1 and 100 mg per L Rhodamine B (RhB) within 60 seconds and 6 minutes, respectively, surpassing recent reported efficiencies. The system also maintained high activity over a broad pH range (3–9). Radical quenching experiments and electron paramagnetic resonance (EPR) analysis identified sulfate radicals (˙SO4−4) and singlet oxygen (1O2) as the dominant reactive species. Furthermore, the catalyst exhibited excellent recyclability with no significant loss in activity after five consecutive cycles. This work provides a facile and scalable strategy for preparing highly active cobalt-based catalysts, demonstrating great potential for practical applications in industrial wastewater treatment and environmental remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jie Cao,Jingge Niu,Yizhuo Pang,Tianshu Luo,Jiayi Peng,Xiaohong Hou
Nitrite is a kind of frequently detected inorganic pollutants in water. In order to sensitively and conveniently monitor the nitrite anytime and anywhere, colorimetric sensing method-based nanoenzymes and portably immediate detection devices become urgent. Herein, we utilized L-arginine as a catalyst and a linker to mediate the synthesis of CeO 2 on bimetallic MOFs (CeO 2 @Mn/ZIF-67), with Co and Mn were set as the central metals. Its enzyme-activated performance ( K m : 0.054 mM and V max : 64.00 μMs −1 ) was superior to most reported materials. Nitrite can diazotize with oxTMB, causing a change in the ratio of absorbance at 652 nm to absorbance at 450 nm (A 652 /A 450 ). Thus, a rapid and sensitive platform for the colourimetric detection of nitrite was established. A portable glass tube hydrogel sensor was designed inspired by the principle of disposable alcohol swabs for the first time to achieve the nitrite monitoring. When the glass tube was cut to introduce TMB and nitrite into the nanoenzymes, a noticeable colour change occurred. Attributed to the high activity of the nanoenzymes and the clever design of the detection device, the proposed method overcame the shortcomings of the traditional sensing methods such as long detection time and poor portability.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-12
·
IF 2.4
Lu Wei,Zhou Liang
Photocatalytic regeneration of nicotinamide adenine dinucleotide (NADH) is indispensable for the sustainability of enzyme-driven industrial processes. In this study, we developed a Z-scheme heterogeneous photocatalyst consisting of CdS and g-C 3 N 4 , which markedly enhanced visible-light absorption and photogenerated charge separation efficiency, and applied it to an in situ visible-light-driven NADH regeneration system. The synthesized catalyst afforded an exceptional NADH regeneration yield of 97.88% within just 15 min. Additionally, enzyme activity assays utilizing alcohol dehydrogenase (ADH) demonstrated that 67.60% of NAD + was successfully converted into the enzymatically fraction, 1,4-NADH. Furthermore, formate dehydrogenase (FDH) immobilized on ZIF-8 was integrated into this NADH regeneration system, enabling highly sustainable biosynthesis of formic acid. During a 2 h continuous reaction, the integrated system successfully accumulated a total formic acid concentration of 0.88 mM. This novel Z-scheme photocatalytic system thus presented a highly effective solution for regenerating active NADH, providing valuable insights and promoting the development of photocatalysis-driven enzymatic systems for sustainable solar-to-chemical energy conversion. Graphical
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·Vol. 143
·期 15
·e70470
·
IF 3.1
Biqin Chen,Yuxia Li,Jinghao Cao,Shenghui Liu,Ke Fan,Haixin Li
The existing TUF membranes often face challenges such as declining permeation flux and insufficient separation selectivity. This study proposes to improve the above problems by the synergistic effect of Mg–Al layered double hydroxide (LDH) and tannic acid (TA) etched metal–organic frameworks (MOFs): (1) TUF membranes with adjustable interlayer distances and multi-level mass transfer channels were constructed by doping LDH two-dimensional (2D) nanosheets; (2) TAZIF-L (Co) etched by TA was introduced. TA inhibited the swelling of LDH nanosheets through coordination and enhanced the interface binding between ZIF-L (Co) and the substrate, thereby suppressing its shedding. The results showed that TA can etch ZIF-L (Co), and the membrane prepared after etching has better selectivity and stability of dye/salt separation. Taking MTAZIF-0.02 as an example, the pure water flux was 88.23 L m −2 h −1 , which was 1.91 times that of MLDH. The removal rate of congo red (CR) solution was 92.56%. The NaCl rejection in methyl blue (MB)/NaCl solution was 10.88% and in CR/NaCl solution was 10.57%. This study provides an experimental basis for the construction of highly selective ultrafiltration membrane for the treatment of high concentration dye/salt wastewater.
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2026
·Vol. 19
·期 10
·295
·
IF 3
Su Kaiyue,Peng Xinli,Zheng Yuze,Qiao Xuguang,Waterhouse Geoffrey I.N.,Xu Zhixiang
In this paper, a molecularly imprinted polymer with good benzopyrene adsorption performance and a PDA@Mn-ZIF-8 nanozyme with high catalytic activity were synthesized. The molecularly imprinted polymer was used as the biomimetic antibody, while the PDA@Mn-ZIF-8 was used as the marker. A novel direct competitive biomimetic enzyme-linked immunosorbent assay (BELISA) method was established for the sensitive detection of benzopyrene. Under the optimal conditions, the detection limit (LOD and IC 15 ) and sensitivity (IC 50 ) of the BELISA method for benzopyrene were 0.52 µg L −1 and 65.64 µg L −1 , respectively. This method was successfully used to detect benzopyrene in chicken and pork samples, with recovery rates ranging from 89.12 to 105.26% for chicken and 92.83 to 112.31% for pork. The contents of benzopyrene in sausages and grilled lamb samples were determined by BELISA and HPLC, and no significant differences found between the results of the two methods. This work offers a new, rapid, and accurate method for the detection of benzopyrene in foods.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaofei Wang,Ganfan Zhang,Qian Wang,Yue Li,Shouwu Guo
Transition metal phosphides capture wide attention as electrocatalysts in lithium-sulfur (Li-S) batteries due to their unique electrocatalytic activity, and metal-organic framework (MOF) is well suited as precursor due to the inherent advantages such as structural/morphology diversity, tunable composition and distribution of internal elements. However, the relationship of the fabrication process, the phase and actual catalytic activity have been controversial. Herein, based on a facile morphological engineering of ZIF-67 (a classic MOF), three kinds of cobalt phosphide (polyhedron, cube and flake-like) are fabricated and different from traditional delicate strategies such as adopt surfactant and methanol to fabricate three-dimensional ZIF-67 (polyhedron or cube), two-dimensional flake ZIF-67 can be obtained just in aqueous solution without any agent. Besides, CoP/Co 2 P heterostructure is regularly induced although they are fabricated under the same condition, especially for flake cobalt phosphide. Furthermore, the flake cobalt phosphide exhibits improved redox reaction kinetics of polysulfides than that of other cobalt phosphides. After modifying commercial separator using the obtained flake cobalt phosphide, the Li-S battery exhibits a high initial capacity of 1253.6 mAh g −1 at 0.2 C and 858.7 mAh g −1 at 2 C. Meanwhile, the battery can also deliver a capacity of 1064.2 mAh g −1 even under a high sulfur loading of 4.0 mg cm −2 . Furthermore, a capacity retention can reach 67.1% after 110 cycles. This work emphasizes the importance of morphology design of multifunctional catalysts for high performance Li-S battery.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Jiang,Min Liu,Dalun Xu,Tao Jiang,Jinjie Zhang
As a hypertoxic natural toxin, the risk of Microcystin-leucine-arginine (MC-LR) residues in Bellamya aeruginosa deserves more attention. Herein, employing the conventional thin-layer chromatography (TLC) technology and a novel surface-enhanced Raman scattering (SERS) substrate, a TLC-SERS chip was fabricated for the purification and quantitative detection of MC-LR in complex samples. The substrate exhibited excellent SERS performance with an enhancement factor of 6.6 × 10 7 , a low detection limit of 2.27 × 10 −9 mM for MC-LR, excellent uniformity and reproducibility, as well as a wide linear range. With the application of TLC, the MC-LR was efficiently purified and the concentration was increased to >3 times. Ultimately, recovery rates fluctuated between 93.28% and 101.66% were obtained from the TLC-SERS chip. On balance, the TLC-SERS chip has a robust capacity for achieving rapid and stable quantitative detection of MC-LR, which promises to improve the efficiency of food safety monitoring.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）