Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Malcom Frimpong Dapaah,Baojian Liu,Liang Cheng
Metal-organic frameworks (MOFs) are of particular interest in the adsorption of organic pollutants . This study investigated the adsorption of aniline (ANI), furfural (FUR), and bisphenol A (BPA) in aqueous solution using MIL-101(Cr)-X (X = –H, –NO 2 , –NH 2 and, –N-2-pyc), MIL-100(Cr, Fe), HKUST-1, and ZIF-8. For the first time, an imino-functionalized MOF was used to adsorb organic compounds in water. MOFs were characterized by XRD, N 2 adsorption-desorption, SEM , TEM, elemental analysis, and FTIR. MIL-101-N-2-pyc demonstrated the highest adsorption capacity of 460.8, 126.5, and 100.7 mg/g towards 500 mg/L BPA, ANI, and FUR respectively. The adsorption isotherms better suited the Langmuir model than the Freundlich model. Importantly, 98% of BPA (100 mg/L) was removed and the kinetic data correlated well with the pseudo-second-order model (R 2 > 0.998). Binary adsorption of FUR and acetic acid (AA) were determined for industrial relevance. MIL-101-N-2-pyc outperformed commercial activated carbon and the other MIL-101s with an impressive co-adsorption of 66.1 mg/g FUR and 62.5 mg/g AA. Overall, the adsorption mechanism was due to hydrogen bonding, π-π interaction, and electrostatic attraction. Moreover, MIL-101-N-2-pyc exhibited remarkable structural stability and less than 0.01 wt% Cr leached into water. The adsorbent regeneration was improved after 4 cycles in methanol.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHIC SCIENCE
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2024
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IF 1.5
Song Lixin,Zhang Jian,Wang Mingyu,Huang Zhipeng,Zhang Yunxia,Zhang Xing,Liang Yutao,He Juan
A novel approach for the simultaneous separation of zearalenone (ZEN) and four types of aflatoxins (AFB1, AFB2, AFG1 and AFG2) from rice samples was presented. This approach utilized modified MIL-101(Cr)-NH2 as core, with molecularly imprinted polymers (MIPs) serving as the shell. The MIL-101(Cr)-NH2 was prepared via ring-opening reaction, while the imprinted polymers were synthesized using warfarin and 4-methylumbelliferyl acetate as co-pseudo template, ethylene glycol dimethacrylate as the cross-linker and azobisisobutyronitrile as initiator. The resulting co-pseudo-template-MIPs (CPT-MIPs) were thoroughly characterized and evaluated. Adsorption studies demonstrate that the adsorption process of CPT-MIPs follows a chemical monolayer adsorption mechanism, with imprinted factors ranging from 1.24 to 1.52 and selective factors ranging from 1.29 to 1.52. Self-made columns were prepared, and the method for separation was developed and validated. The limit of detections ranged from 0.12 to 2.09 μg/kg, and the limit of qualifications ranged from 1.2 to 6.25 μg/kg. To assess the reliability of the method, ZEN and AFs were spiked at three different levels, and the recoveries ranged from 79.53 to 94.58%, with relative standard deviations of 2.90–5.78%.
研究领域:
食品安全
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
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2024
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IF 5.6
Xueyun Wei,Zhuomin Zhang,Gongke Li
Aromatic disinfection by-products (DBPs) have garnered considerable interest in recent years for their potential carcinogenicity. However, efficient separation and enrichment of DBPs in complex samples is a challenge due to the extremely low content of aromatic DBPs and the complexity of sample matrices. In this study, a MIL-101(Cr)–NH 2 @TAPB-DVA-COF hybrid material was prepared as the enrichment medium of membrane solid-phase extraction (M-SPE) to efficiently determine trace emerging aromatic DBPs. This medium exhibited excellent enrichment capacity and selectivity for aromatic DBPs because of the strong hydrogen bonding, π-π stacking and hydrophobic interactions. An efficient analytical method for five aromatic DBPs in juice drinks was successfully established by use of this hybrid material as the enrichment medium for M-SPE in combination with liquid chromatography tandem mass spectrometry (LC-MS/MS). The limits of detection of the established method were from 0.50 to 3.00 ng/L. Moreover, the method had been successfully used in real juice drinks to determine trace five aromatic DBPs with the spiked recoveries ranging from 84.1% to 125%. The method possessed high analytical sensitivity and accuracy for these five aromatic DBPs in juice drinks with the aid of the efficient M-SPE technology proposed.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Ziyong Chang,Baili He,Xiaosha Gong,Xiaoyue Qi,Kexin Liu
Preparation of efficient adsorbents is of great significance for the recovery of precious metals from secondary resources. Herein, –NH 2 was successfully grafted on MIL-101(Cr) via hydrothermal reaction to improve the adsorption capacity of Au (Ⅲ) in aqueous solution. MIL-101(Cr)–NH 2 had a huge specific surface area (1016.50 m 2 ‧g −1 ), which can provide more adsorption sites for Au (III). At 298 K, the maximum adsorption capacity of Au (III) by MIL-101(Cr)–NH 2 was 792.43 mg∙g −1 and was higher than that by MIL-101(Cr) (140.83 mg∙g −1 ). The adsorption data was well fitted by Langmuir and pseudo-second-order models, confirming that the adsorption process conformed to single molecule adsorption and chemical adsorption . Mechanism study indicated that the adsorption of Au (III) by MIL-101(Cr)–NH 2 was initiated with electrostatic attraction and promoted by reduction and inner complexation between AuCl 4 - and protonated amino groups. During adsorption, Au (Ⅲ) was reduced to Au (0) and Au (I) by –NH 2 . Density functional theory (DFT) calculation demonstrated that MIL101(Cr)–NH 2 possessed higher binding affinity and more adsorption sites for Au (III) than MIL-101(Cr). Moreover, MIL-101(Cr)–NH 2 exhibited excellent selectivity towards Au (III) and good recyclability, which is promising in the recovery of precious metals.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Li Gong,Siwei Jin,Renlong Liu,Zuohua Liu,Yijiao Zhang,Li Zhang,Tengda Zhao,Huanbao Fa,Wei Yin
Achieving the real-time, low-cost, portable and accurate NH 3 detection is of great importance in industry owing to the toxicity of NH 3 . In this paper, Pt NPs@MIL-101-NH 2 composites modified screen-printed electrodes (SPEs) were prepared by solvothermal method and ionic liquids [BMIM][BF 4 ] were used as electrolytes. Finally, the prepared Pt NPs@MIL-101-NH 2 /SPEs were combined with a miniature electrochemical workstation to construct a novel electrochemical NH 3 sensor. The experimental results showed that Pt NPs@MIL-101-NH 2 has excellent adsorption capacity for NH 3 , and the sensor has good linearity in the range of 0.7–600 ppm with low limit of detection (0.58 ppm) and fast response time for 10 ppm NH 3 (8.0 s). Furthermore, this sensor also possesses excellent stability, reproducibility, anti-interference and accuracy. The synthesized Pt NPs@MIL-101-NH 2 nanocomposite was proved to be an excellent candidate for constructing high-performance NH 3 sensor for industry.
研究领域:
材料科学
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环境监测
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工业安全
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Runren Jiang,Guanghua Lu,Tianjian Dang,Min Wang,Jianchao Liu,Zhenhua Yan,Haijiao Xie
The use of photocatalysis to remove pharmaceuticals and personal care products (PPCPs) is emerging as a promising method, but few studies have investigated the simultaneous degradation of multiple PPCPs. Here, we constructed a hydrogen-bonded bridged MIL-101(Cr)–NH 2 /BiOCl-OH (MCN/BOCH) system to degrade sulfamethoxazole and ethyl p-aminobenzoate alone or in combination. The MCN/BOCH system effectively removed two PPCPs under visible light and exerted a synergistic effect on degrading the combined pollutants. Meanwhile, the degradation products of the mixture changed significantly compared with that of a single pollutant, and the toxicity of the composite pollutants was significantly reduced through the combined effect of synergistic degradation. The bridging of hydrogen bonds effectively accelerated charge transfer at the heterojunction interface under visible light. Moreover, the separated redox side of the MCN/BOCH heterojunction system and the electron donor and acceptor effect of the two PPCPs significantly enhanced the synergistic photocatalytic degradation performance. This work might be useful for controllable designs of hydrogen-bonded photocatalysts for the treatment of complex PPCP pollution.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yihao Zhang,Yalong Lei,Tiange Yan,Yu Liao,Gang Han
2,4-dichlorophenoxyacetic acid (2,4-D) is a widely used herbicide and plant growth regulator worldwide; however, its overdose and improper use would cause severe eco-toxicological effects on aquatic life, plants, and human life. This work synthesized high-quality MIL-101(Cr)-NH 2 nanoparticles via a one-pot hydrothermal reaction and used it in pioneer as an amine-functionalized mesoporous metal–organic frameworks (MOFs) adsorbent for 2,4-D removal. The adsorption kinetics results confirmed that MIL-101(Cr)-NH 2 obeys the pseud-second-order kinetic model, and the isotherm results imply that it shows multilayer adsorption following the Freundlich model. Compared to state-of-the-art benchmark MOF adsorbent UiO-66-NH 2 , MIL-101(Cr)-NH 2 achieved a superior 2,4-D adsorption capacity of 348.5 mg/g at pH = 7 with a nearly 50 % increase in adsorption removal rate under ambient conditions. Spectroscopy analysis and density functional theory (DFT) calculations revealed that the distinct large pore size, high surface area and porosity of MIL-101(Cr)-NH 2 are the essential physical factors for enhancing the diffusion ability of 2,4-D in the framework. Meanwhile, the electrostatic interactions of the metal clusters and aminated benzene ring with the dissociated 2,4-D anion are the dictated binding forces during adsorption. This mechanism was further validated by the adsorption behaviors of other contaminants over the two MOF adsorbents. Furthermore, the MIL-101(Cr)-NH 2 nanoparticles can be chemically anchored onto chitosan to form MIL-101(Cr)-NH 2 /Chitosan foams with feasible recovery ability and it was found that the MIL-101(Cr)-NH 2 /Chitosan (1/3) foam showed a comparable 2,4-D removal rate to UiO-66-NH 2 (52.2 % vs. 57.7 %). This study reported a high-performance aminated MOF adsorbent for 2,4-D removal and the revealed adsorption mechanisms offer an excellent platform for rational design of advanced adsorbents for acidic contaminants adsorption.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jing Meng,Moustafa Zahran,Ahmed S. Abou-Elyazed,Xiaolin Li
Herein, we report a novel electrochemical sensor for determining glucose in sweat, employing a graphene/metal–organic framework (MOF) as a modifier for stainless steel (SS) electrode. The MOF structures, MIL-101(Cr), MIL-101(Cr)-NO 2 , and MIL-101(Cr)-NH 2 , were hydrothermally synthesized and then characterized using X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, N 2 adsorption/desorption isotherms, and scanning electron microscopy (SEM). XRD and SEM results proved the formation of the crystalline MIL-101(Cr) and MIL-101(Cr)-NO 2 , and the amorphous MIL-101(Cr)-NH 2 . Additionally, FT-IR and isotherms confirmed their composition and mesoporosity, respectively. The amorphous MIL-101(Cr)-NH 2 showed the best electrocatalytic activity towards glucose oxidation among the fabricated MOFs. The electrocatalytic activity was also boosted after incorporating conductive graphene. Under optimized conditions, graphene/MIL-101(Cr)-NH 2 /SS was used for glucose determination using square wave voltammetry and chronoamperometry with detection limits of 0.004 and 0.01 mM, respectively. Moreover, the modified electrode showed acceptable recovery values when it was applied to detect glucose in artificial sweat samples.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Tian Tian,Yannan Jia,Jianguo Wu,Jinlong Zhao,Kai Xu,Zijie Wang,Zheng Wang
With the increasing threat antimony (Sb) pollution poses to the environment, its removal from water is becoming increasingly important. Accordingly, metal-organic frameworks (MOFs) are garnering increasing research attention owing to their excellent performance as adsorbents. Here, the MOF MIL-101(Cr)-NH 2 was prepared directly by solvothermal synthesis. Sb(III) adsorption using MIL- 101(Cr)-NH 2 was evaluated systematically at varying adsorbent dosages and pHs. And the adsorption kinetics, isotherms, and thermodynamics were explored by altering the contact time, initial Sb(III) concentration, and temperature, respectively. The results revealed that Sb(III) was adsorbed onto MIL-101(Cr)-NH 2 very quickly, even at low antimony concentrations. The maximum Sb(III) adsorption capacity of MIL-101-NH 2 is 83.61 mg g -1 . In the presence of coexisting ion (NO 3 - ), the amount of Sb(III) adsorbed was slightly increased, which may be due to the formation of an inner-sphere complex. The Box–Behnken method was used to design and optimize a response surface with reference to three main influencing factors, that is, dosage, pH, and temperature, so as to obtain a multivariate quadratic model of adsorption behavior and identify the optimal adsorption conditions. Finally, a preliminary economic analysis of the synthetic material was carried out.
研究领域:
环境科学
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材料科学
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化学工程
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环境污染治理
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吸附技术
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2018
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IF 5.123
Sandip Mondal,Jianqiao Xu,Guosheng Chen,Siming Huang,Chuyu Huang,Li Yin,Gangfeng Ouyang
Antibiotics are a group of antibacterial drugs used in the treatment and prevention of bacterial diseases in humans, veterinary animals, and farmed fish. Inappropriate and excessive use of antibiotic therapy leads to antibiotic fragment in the water bodies thus affect the aquatic organisms . In this study, an amino group modified high surface area metal-organic framework (MOF) MIL-101(Cr)-NH 2 was used to prepare solid-phase microextraction (SPME) fiber to detect four different classes (total 6 ABs) of antibiotics for the first time from living tilapia fish ( Oreochromis mossambicus) by coupling SPME with high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS). The extraction efficiencies of the custom-made fiber were superior as compared with the commercial C18, polydimethylsiloxane (PDMS), PDMS/divinylbenzene (DVB) and polyacrylate fibers. The custom-made fiber also exhibited excellent reproducibility with the low intra-fiber relative standard deviations (RSDs 1.5%–8.3%) and inter-fiber RSDs (7.3%–14.5%), which made it ideal for in vivo extraction in fish muscle. The as-prepared MIL-101(Cr)-NH 2 fiber was then used to determine antibiotics in the dorsal-epaxial muscle of living fish. Comparing to the traditional solid-liquid extraction (SLE) method, the SPME method showed reduced invasiveness and higher sensitivity than the SLE method. In general, this study explored a convenient, cost-effective and highly sensitive SPME method based on amino modified MOF for in vivo antibiotic detection in fish muscle.
研究领域:
环境科学
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分析化学
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水产养殖学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yong Zhang,Jing Wang,Ying Liu,Xuemeng Wu,Lina Gao,Guihua Gao
In this study, a tip foam named as MIL-101(Cr)-NH₂/chitosan (MIL-101(Cr)-NH₂/CS) was prepared by cross-linking chitosan (CS) with MIL-101(Cr)-NH₂ using glutaraldehyde as the cross-linking agent. After freeze-drying, the internal structure of the MIL-101(Cr)-NH₂/CS foam became porous, thereby exposing more MIL-101(Cr)-NH₂, enriching binding sites, ensuring efficient adsorption, and allowing smooth passage of the sample solution. This also facilitates the inhalation and extrusion of the sample solution. Based on the unique advantages of the MIL-101(Cr)-NH₂/CS foam, a method combining pipette tip solid-phase extraction (PT-SPE) with high-performance liquid chromatography equipped with a fluorescence detector (HPLC-FLD) was established for the detection of puerarin and its metabolites (e.g., daidzein and equol) in rat serum. The method exhibited good linearity in the range of 0.5 to 5000 ng/mL, with limits of detection (LOD), lower limits of quantification (LLOQ), and limits of quantification (LOQ) ranging from 0.2 to 15 ng/mL, 0.5 to 50 ng/mL, and 1 to 100 ng/mL, respectively. The relative standard deviations (RSDs) of intra-day and inter-day precision for puerarin, daidzein, and equol were less than 19.8 %, meeting relevant regulatory requirements. The extraction recoveries of puerarin, daidzein, and equol ranged from 80.17 % to 91.70 %, 80.02 % to 87.41 %, and 80.29 % to 85.39 %, with corresponding RSDs of 3.2 % to 10.4 %, 11.2 % to 13.8 %, and 7.9 % to 11.1 %. These results indicate that the developed method meets the methodological requirements for the quantitative analysis of biological samples. The application of MIL-101(Cr)-NH₂/CS foam in PT-SPE further expands the application scope of metal-organic frameworks (MOFs) in solid-phase extraction (SPE) and provides a reference for PT-SPE technology in handling small-volume samples in complex matrices.
研究领域:
分析化学
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材料科学
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药物分析
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环境科学
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生物分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）