INORGANICA CHIMICA ACTA
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2022
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IF 3.118
Yan Wang,Wenpei Feng,Jinjun Li,Zhixiong You
Metal-organic frameworks (MOFs) have shown attractive advantages in adsorbing dyes from wastewater. However, their complex synthesis processes and poor stability have limited their applications. Herein, we proposed a novel two-step route to prepare NH 2 -MIL-53(Fe) at room temperature and investigated its dye adsorption performance. The prepared NH 2 -MIL-53(Fe) displayed high water stability in the pH range of 3–11. Moreover, NH 2 -MIL-53(Fe) showed a significantly higher adsorption capacity and faster adsorption rate towards congo red (CR) than the other selected dyes, with more than 99 % of CR being removed by NH 2 -MIL-53(Fe) within 20 min. The maximum adsorption capacity of NH 2 -MIL-53(Fe) for CR was 1877 mg·g −1 . Besides, the removal efficiency of CR could maintain higher than 80 % within the tested pH range (3 to 11), and removal efficiency was consistently higher than 95 % at different NaCl concentrations (0 to 0.4 M). The dynamic CR adsorption process matched the pseudo-second-order kinetic model and fitted well using the Langmuir model, suggesting that the adsorption of CR onto NH 2 -MIL-53(Fe) was a monomolecular-layer chemical adsorption process. More importantly, NH 2 -MIL-53(Fe) showed high removal efficiency and good reusability towards CR in both synthetic and model wastewater. Mechanistic studies suggested that the removal of CR was attributed to the synergistic effects of the π-π stacking interactions, hydrogen bonds and electrostatic interactions between CR and NH 2 -MIL-53(Fe). Overall, the present study provides a novel strategy for the facile synthesis of NH 2 -MIL-53(Fe), highlights the excellent adsorption performance and reusability towards CR and underlies the adsorption mechanisms involved.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Donglian Deng,Jingyuan Xu,Tingting Li,Dongdong Tan,Yibing Ji,Ruijun Li
This work designed a fluorometric/colorimetric dual-mode sensor for detecting 2,6-dipicolinic acid (DPA) based on the blue emission property and peroxidase-like activity of Fe-MIL-88NH 2 . The fluorescence of Fe-MIL-88NH 2 was obviously turned off by Cu 2+ , but DPA was able to bring it back because it has a strong chelate bond with Cu 2+ . Fe-MIL-88NH 2 also displayed high peroxidase-like activity, which accelerated the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to the blue oxidation product (oxTMB) when H 2 O 2 was present. When DPA was added, it efficiently inhibited the peroxidase-like activity of Fe-MIL-88NH 2 , causing less oxTMB and less absorbance at 652 nm. The fluorescence recovery of Fe-MIL-88NH 2 and the change in absorbance at 652 nm were used as analytical signals for dual-mode detection of DPA. The linear responses in the range of 10–60 μM and 60–160 μM were achieved for the fluorometric mode, and the limit of detection (LOD) was 1.46 μM. The respective values of linear range and LOD for the colorimetric mode were 5–25 μM and 3.00 μM, respectively. In summary, the dual-mode testing strategy successfully detected DPA in aqueous environmental samples, suggesting great potential in disease prevention and environmental analysis.
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高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 4
·2896-2905
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IF 11.806
Xu Haitao,Zu Mei,Cheng Haifeng,Liu Dongqing,Xie Wei
The thermal management of electronic devices has attracted significant research attention in the recent year. However, the commonly used thermal management materials at this stage are mainly phase change materials (PCMs), which are limited by their relatively low enthalpy. In this study, the metal–organic framework MIL-101(Cr) was synthesised by an environmentally friendly and low-cost L-malic acid as the mineralising agent. The as-prepared MIL-101(Cr) composite coating was utilised as a sorbent for a passive thermal management strategy, through a vapour sorption–desorption process. By coating the as-prepared MIL-101(Cr) powder onto a metal substrate, a temperature drop for 25 min (maximum 8.6 °C) was achieved for 0.256 g of coating at a heating power of 2.5 W. The use of latent heat has emerged as an attractive method for intermittent heat dissipation. The equivalent enthalpy of the composite coating could reach as high as 1171.9 J/g coating , indicating a significant improvement in the thermal management performance compared with the conventional PCMs. Graphical abstract
Summary: A composite coating for thermal management was obtained by silicate solution and powder MIL-101(Cr).
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Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Jinchao Chen,Chunmei Gao,Shuangquan Zhao,Shenghui Liu,Shifeng Ji,Yunqing Xing,Tianyang Wu,Jinjian Wu,Hongyu Chen,Peng Zou,Jiaonan Cai
In this work, the NH 2 -MIL-125/F127/PES membranes with superior ultrafiltration , anti-fouling and self-cleaning were constructed via the RTIPS method. Characterizations showed the successful fabrication of NH 2 -MIL-125 with good photocatalysis activities, together with its stable anchoring in PES membrane. The loss of NH 2 -MIL-125 was suppressed by hydrogen bond between F127 and NH 2 -MIL-125, where hydrophilic F127 significantly boosted permeability and anti-fouling property. The permeability-selectivity trade-off effect was alleviated by NH 2 -MIL-125 with a regular size window. It was observed that the membranes prepared by the RTIPS method occurred a spongy-like cross-section and a porous surface, which imparted the membrane with improved ultrafiltration and mechanical properties over the finger-like cross-section and dense skin caused by the NIPS method. The optimal membranes exhibited decent permeability (1511 L/m 2 h), BSA rejection rate (85.3%) and high COD removal rate over the commercial membranes, whose flux recovery rate was up to 76.91% after two cycles under light irradiation by the synergistic effect of F127 and NH 2 -MIL-125. The membrane fouled with RhB exhibited excellent regeneration properties benefiting from the holes (h + ) and superoxide free radicals ( • O 2 − ), as well as reactive •OH. Overall, the membrane with F127 and NH 2 -MIL-125 presented a highly promising in improving ultrafiltration and self-cleaning via the RTIPS method.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Ning Wu,Hao Guo,Mingyue Wang,Liping Peng,Yuan Chen,Bingqing Liu,Zhilan Pan,Yinsheng Liu,Wu Yang
Ratio fluorescence has attracted much attention because of its self-calibration properties. However, it is difficult to obtain suitable fluorescent materials with well-resolved signals simultaneously under one excitation. In this work, we report a different strategy, using MIL-68(In)-NH 2 as both the fluorescence element and the scattered light unit, and coupling the fluorescence and the scattered light to construct the fluorescence and scattered light ratio system. Based on the optical properties and the second-order scattering (SOS) of the material nanoparticles , the synthesized MIL-68(In)-NH 2 can be used to realize the ratio detection of Hg 2+ . Because the scattering intensity of small particle MIL-68(In)-NH 2 is weak, SOS is not obvious. When Hg 2+ is introduced the coordination reaction between the amino nitrogen atoms of MIL-68(In)-NH 2 and Hg 2+ make the particles larger, resulting in the decrease of fluorescence and the enhancement of SOS. As a result, a novel Hg 2+ ratiometric detection method is developed by using the dual signal responses of the fluorescence and scattering. Under the optimal conditions (pH = 6, reaction time 5 min, room temperature , and the maximum excitation wavelength 365 nm), the linear range of the method is 0–100 μM, and the detection limit is 5.8 nM (Ksv = 9.89 × 10 9 M −1 ). In addition, the probe is successfully used to evaluate Hg 2+ in actual water samples. Compared with the traditional method of recording only the fluorescence signal, the proposed fluorescence-scattering method provides a new strategy for the design of ratiometric sensors.
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高影响因子
CHEMICAL PAPERS
·
2022
·Vol. 76
·期 7
·4379-4392
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IF 2.146
Zhang Huixian,Hu Xizhou,Xia Hong,Zhou Youxiang,Peng Lijun,Wu Jianyuan,Peng Xitian
Phenoxy carboxylic acid herbicides (PCAs) are widely used in agricultural production. However, due to their potential threat to human health, it is necessary to develop efficient analysis method for monitoring PCA concentration in environment and food samples. Based on dispersive micro-solid phase extraction (D-μ-SPE) with amine-functionalized metal–organic framework MIL-101(Fe)-NH 2 , a selective, sensitive, and cost-efficient method was proposed for the extraction of PCAs from environmental water and rice samples in this study. From the perspective of adsorption kinetics and isotherms, interaction mechanisms between MIL-101(Fe)-NH 2 and PCAs were investigated. Key parameters of D-μ-SPE procedure including adsorbent dosage, solution pH, ionic strength, eluting solution, and washing solutions were optimized. Using of small amount of MIL-101(Fe)-NH 2 could achieve desirable extraction effect due to its large surface area and multiple interactions with PCAs. Under the optimized D-μ-SPE conditions, calibration curves of 8 PCAs were linear within a concentration range of 0.05–5 ng/mL for water samples ( r 2 > 0.9898) and 0.5–50 ng/g for rice samples ( r 2 > 0.9879). Limits of detection of water and rice samples were as low as 0.004–0.008 ng/mL and 0.05–0.1 ng/g, respectively. The recoveries of 8 PCAs ranged from 83.0 to 109.3%. Both inter- and intra-day relative standard deviations were less than 10.3%. Our proposed method was successfully employed in actual environmental water and rice samples.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Youzhou He,Shuang Luo,Yuwei Tan,Mingzuo Chen,Haibo Zhou,Jianning Yu,Linjiang Pu,Yumin Huang,Min Fu,Xingyan Liu
Novel ionic state Co passivated carbon nanodots (Co-CDs) combined with NH 2 -MIL-125 as efficient photocatalysts Co-CDs/NH 2 -MIL-125 were fabricated in a convenient process for the first time. These materials exhibited excellent photocatalytic activity in both NO purification and hydrogen production under visible light irradiation. The NO purification rate of Co-CDs/NH 2 -MIL-125 increased to 46.6%, which was 20.2% and 13.4% higher than that of NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. Moreover, the hydrogen production efficiency of Co-CDs/NH 2 -MIL-125 reached 2261 μmol g −1 , which was 6.86 times and 3.54 times of the values for NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. The corresponding properties characterized by Mott-Schottky, UCPL , and in situ DRIFTS , indicated that the introduction of Co 2+ could not only passivate the CDs to further improve physicochemical properties, but also enhance the photocatalytic activity via the photosensitization and up-conversion effect. This research provides a promising strategy that adding active metal ions passivated CDs in the catalyst platform to improve photocatalytic performance.
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高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Tao Wei,Zhimeng Wang,Mi Zhang,Qi Zhang,Jiahao Lu,Yanyan Zhou,Cheng Sun,Zidong Yu,Yu Wang,Man Qiao,Sai Qin
As a common filler in polymer electrolytes , Metal-organic frameworks (MOFs) has been studied extensively in recent years. In this study, we propose a novel solid composite electrolytes (SCEs) based on PEO/LiTFSI/a-MIL-100 (Fe)/PVDF by using a straightforward solution-casting method. Unactivated and activated MIL-100 (Fe) (a-MIL-100 (Fe)) as the fillers were compared, and the interactions of functional groups of unactivated MIL-100 (Fe) and a-MIL-100 (Fe) with anions of electrolyte salts through Lewis acid-base interaction are studied with density functional theory (DFT) calculations. The influences of different a-MIL-100 (Fe) contents on electrochemical performances were also examined. The Li/SCEs/LiFePO 4 cell displayed high average discharge capacities of 161.8 mAh g −1 , 166.8 mAh g −1 , 158.9 mAh g −1 , 146.2 mAh g −1 and 92.6 mAh g −1 at the rate of 0.1, 0.2, 0.5, 1 and 2 C at 60 ℃, respectively, without liquid electrolytes. This work might provide new insight into the role of activated MOFs fillers in polymer electrolytes.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 38
·18418-18425
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IF 3.925
Fangfang Li,Yan Chen,Aijia Gao,Wenjing Tong,Changchun Ji,Yong Cheng,Ying-Hua Zhou
It is highly desired yet an enormous challenge to exploit efficient catalysts for epoxide cycloaddition with carbon dioxide to achieve the goal of carbon neutrality. Herein, the novel heterogeneous catalysts of MIL-101-IL(RBr) (R = Et, Pr, Bu, and Pe) were synthesized by grafting polypyridyl-based ionic liquids (IL) into the nodes of MIL-101(Cr) through the post-synthetic modification of metal–organic frameworks (MOFs). The octahedral MIL-101-IL(BuBr) with an average size of ca. 800 nm exhibited superior activity for catalyzing epichlorohydrin–CO2 cycloaddition into chloropropene carbonate, with an yield of 92% at 110 °C under 1.0 MPa CO2 without any cocatalyst and solvent. The excellent performance could be attributed to the nucleophilic nature of grafted ionic liquids in the MOF along with the effectiveness of mass transfer afforded by the MOF porosity. Moreover, MIL-101-IL(BuBr) presented a favorable versatility toward other epoxides and a satisfactory recyclability. In addition, a possible mechanism has been proposed for the catalytic reaction of epichlorohydrin–CO2 cycloaddition over MIL-101-IL(BuBr).
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 24
·11840-11850
·
IF 3.925
Dongying Zhu,Zhujun Huang,Haiyan Wang,Qiujun Lu,Guihua Ruan,Chenxi Zhao,Fuyou Du
The fabrication of sustainable and reusable photocatalyst materials is urgent and desirable for the removal of emerging pharmaceutical pollutants (EPPs) in environmental water samples. In this work, we described the fabrication of electrospun nitrogen-rich carbon nitrides/MIL-101(Fe)/poly(acrylonitrile-co-maleic acid) nanofibers (E-spun g-C3N5/MIL-101(Fe)/PANCMA NFs) by using electrospinning dispersion solutions of g-C3N5/MIL-101(Fe) and PANCMA, as well as their applications as sustainable and reusable photocatalysts toward a model EPP carbamazepine degradation under light irradiation. The E-spun g-C3N5/MIL-101(Fe)/PANCMA NFs exhibited the highest carbamazepine degradation efficiency of 94.2% within 40 min. The O2˙−, ˙OH, and h+ reactive species all participated in the photodegradation process, and some degradation byproducts of carbamazepine were identified by liquid chromatography-mass spectrometry. Importantly, the electrospun photocatalyst possessed high reusability (at least 15 consecutive runs) and wide applications in the degradation of other EPPs (such as tetracycline and ciprofloxacin), which suggested the great potential of the electrospun photocatalytical nanofibers in the EPPs removal.
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高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Dianfa Zhao,Jie Liu,Lijuan Zhang,Yunshan Zhou,Yuxu Zhong,Yang Yang,Chengcheng Huang,Yong’an Wang
Maintaining a long-term continuous and stable reactivator blood concentration to treat organophosphorus nerve agent poisoning using acetylcholinesterase (AChE) reactivator pralidoxime chloride (2-PAM) is very important yet difficult. Because the flexible framework of MIL-88B(Fe) nanoparticles (NPs) can swell in polar solvents, pralidoxime chloride (2-PAM) was loaded in MIL-88B(Fe) NPs (size: ca. 500 nm) by stirring and incubation in deionized water to obtain 2-PAM@MIL-88B(Fe), which had a maximum drug loading capacity of 12.6 wt %. The as-prepared composite was characterized by IR, powder X-ray diffraction (P-XRD), scanning electron microscopy (SEM), ζ-potential, Brunauer–Emmett–Teller (BET), and thermogravimetry/differential thermal analysis (TG/DTA). The results showed that under constant conditions, the maximum drug release rates of 2-PAM@MIL-88B(Fe) in absolute ethanol, phosphate-buffered saline (PBS) solution (pH = 7.4), and PBS solution (pH = 4) at 150 h were 51.7, 80.6, and 67.1%, respectively. This was because the composite showed different swelling behaviors in different solvents. In PBS solution with pH = 2, the 2-PAM@MIL-88B(Fe) framework collapsed after 53 h and released 100% of 2-PAM. For mice after intragastric poisoning with sarin (a neurotoxic agent), an atropine-assisted 2-PAM@MIL-88B(Fe) treatment experiment revealed that 2-PAM@MIL-88B(Fe) continuously released 2-PAM for more than 72 h so that poisoned AChE was continuously and steadily reactivated. The reactivation rate of AChE was 56.7% after 72 h. This composite is expected to provide a prolonged, stable therapeutic drug for the mid- and late-stage treatment of neurotoxic agent poisoning.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hui He,Yuexin Wang,Juan Li,Shanliang Jiang,Subhan Sidra,Wenxue Gong,Ying Tang,Yang Hu,Rule Wei,Dongxiao Yang,Xuesheng Li,Zhongxing Zhao
High light adsorption and fast charge separation are crucial for photo-Fenton catalytic activity of MOFs. Herein, bottom-up design was proposed to fabricate polypyrrole (PPy C ) nanowires in MIL-88B(Fe) cages as photo-Fenton catalyst for Sulfamethoxazole (SMX) efficient degradation. Pyrrole was prior anchored into MIL-88B(Fe) cluster via Fe-N coordination, and then the additional monomer pyrrole was further triggered bottom-up polymerization in confined cages of MIL-88B(Fe) and formed PPy C @Py-MIL(Fe) composite. These PPy C nanowires were dispersed in Py-MIL(Fe) cages and tightly connected with MOFs clusters via Fe-N bonding. Characterization proved that: (1) Interfacial Fe-N can significantly promote the efficient electron transport from PPy C nanowires to Py-MIL(Fe), enhance optical absorption property, and construct strong Lewis acidic sites and ligand vacancies in PPy C @Py-MIL(Fe). (2) The confined PPy C nanowire via Fe-N connection remarkably promote photo-generated electron-hole separation, Fe 2+ |Fe 3+ redox ability of MOF, and improved photo-electric corrosion ability. As a result, it significantly enhanced the photo-Fenton catalytic performance for SMX degradation. Catalytic oxidation was attributed to the generation of ‧OH species that oxidized 93% SMX in 60 min, showing ultra-rapid degradation and TOC removal rates of 33.7 min −1 ·mg·g −1 and 8.68 min −1 ·mg·g −1 respectively, which was about 4–220 times higher than those reported state-of-the-art catalysts. Additionally, the PPy C @Py-MIL(Fe) catalyst showed minimal loss in catalytic activity even after recycling for 10 times, exhibiting good recycling stability compared to many MOFs. Systematic analysis shown that in-situ anchored growth of polypyrrole in confined porous cages of MOF can effectively enhance the catalytic activity and stability of MIL-88B(Fe), and has great development potential applications for photo-Fenton catalytic degradation of organic pollutants.
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