TALANTA
·
2017
·
IF 4.162
Xue Qian Tang,Yi Dan Zhang,Zhong Wei Jiang,Dong Mei Wang,Cheng Zhi Huang,Yuan Fang Li
In this work, Fe 3 O 4 and metal–organic framework MIL-101(Fe) composites (Fe 3 O 4 /MIL-101(Fe)) was demonstrated to possess excellent catalytic property to directly catalyze luminol chemiluminescence without extra oxidants. We utilized Fe 3 O 4 /MIL-101(Fe) to develop a ultra-sensitive quantitative analytical method for H 2 O 2 and glucose. The possible mechanism of the chemiluminescence reaction had been investigated. Under optimal conditions, the relative chemiluminescence intensity was linearly proportional to the logarithm of H 2 O 2 concentration in the range of 5–150 nM with a limit of detection of 3.7 nM (signal-to-noise ratio = 3), and glucose could be linearly detected in the range from 5 to 100 nM and the detection limit was 4.9 nM (signal-to-noise ratio = 3). Furthermore, the present approach was successfully applied to quantitative determination of H 2 O 2 in medical disinfectant and glucose in human serum samples.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wenhao Gu,Jinxian Feng,Xingshuai Lv,Weng Fai Ip,Hui Pan
Photocatalytic CO 2 reduction has been considered as an efficient way for the carbon nuetrality. In this work, a series of (Cu, Mn) co-incorporated metal-orgnaic frameworks (MOFs) (NH 2 -MIL-125(Ti) (NML)) with different Cu 2+ /Ti 4+ and Mn 2+ /Ti 4+ molar ratios are systematically investigated to improve the efficiency for photocatalytic CO 2 reduction. The optimized sample (1 M−5C−−NML) shows a highest yield of HCOOH (116.74 μmol . g −1. h −1 ) (3.71 times higher than that of NML), and a superior apparent quantum efficiency (AQE) (6.74 % at 405 nm). The improved performance is attributed to the formed oxygen vacancy and intermediate energy level as introduced by the co-incorporation, which facilitate the charge separation and enhance the visible-light-harvesting of NML. It shows that the density of oxygen vacancies increases with the increasing amount of Cu, resulting in enhanced charge separation. However, the increasing amount of Mn leads to the short-range Mn-Mn interaction, the concentration quenching effect as well as the inhibited photocatalytic performance. This work shows that the co-incorporated MOFs can be used as an advanced photocatalyst.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Tian Zhao,Saiqun Nie,Pengcheng Xiao,Shilin Peng,Jiayao Chen,Jiangrong Yu,Fuli Luo,Yi Chen
The formation of zinc dendrites and by-products significantly affects the cycling performance of aqueous zinc-ion batteries (AZIBs). This study presents the first application of MIL-101(Cr) as a separator material in AZIBs, investigating the impact of various MIL-101(Cr) morphologies in cellulose-based separators on battery performance. The findings demonstrate that separators incorporating spherical MIL-101(Cr) morphology considerably enhance ion conductivity and the transport rate of Zn 2+ ions while effectively inhibiting corrosion reactions and dendrite growth. Notably, the spherical MIL-101(Cr)-based separator exhibited more than double the cycle life of Zn//Zn symmetric cells compared to those made from octahedral and nano-fusion morphologies, achieving over 750 h of operation. Additionally, a Zn//MnO₂ full cells utilizing this separator achieved a remarkable capacity retention of 83.6 % after 400 cycles, with a close-to-100 % Coulombic efficiency. This research underscores the critical role of MIL-101(Cr) morphology in enhancing the performance of AZIB separators, paving the way for innovative designs in future metal-organic framework (MOF)-based separators.
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TALANTA
·
2025
·
IF 6.1
Xin Liu,Shiyue Niu,Bin Yang,Jia Liu,Liqian Niu,Xian Wang,Daqian Song,Shuyun Bi
Ultrasensitive Surface-enhanced Raman spectroscopy (SERS) method for the detection of diquat/dipterex was established using bovine serum albumin (BSA)-protected silver nanoparticles (AgNPs) modified MIL-53(Al) (named as BSA/MIL-53(Al)/AgNPs). Compared with unmodified AgNPs, BSA/MIL-53(Al)/AgNPs significantly enhanced the Raman signals of diquat and dipterex and the enhancement factors (EFs) were 1.58 × 10 7 and 2.34 × 10 7 , respectively. The TEM, XRD, TGA, XPS, UV–vis and FT-IR were utilized to characterize BSA/MIL-53(Al)/AgNPs and the binding of the substrate with diquat/dipterex. The optimal measurement conditions were investigated in detail by single factor experiment and response surface model. The impacts of common pesticides and coexisting substances on the determination of diquat/dipterex were studied. Under optimum conditions, linear calibration curves for detecting diquat/dipterex were established with a limit of detection (LOD) of 0.17/0.89 pmol L −1 (3 S 0 / S ). The SERS approaches were used to detect diquat and dipterex in several fruits and vegetables. The recovery was 97.10 %–104.82 % with the relative standard deviation (RSD) of 1.04 %–4.15 % ( n = 5).
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Meipeng Jian,Xiaoqin Yang,Congxin Huang,Chaochun Tang,Xiwang Zhang,Ruiping Liu,Haiyan Li
Flexible metal–organic frameworks (MOFs) with the gate opening feature can optimize the removal efficiency on the adsorption behavior by accommodating to the specific target molecules. In this study, a flexible MOF denoted as NH 2 -MIL-53(Al) was investigated to remove Hg(II) from water, in which the adsorption capacities of large-pore NH 2 -MIL-53(Al) (NH 2 -MIL-53(Al)-LP) for Hg(II) reached 433.20 mg/g, which is about 4 times higher than narrow-pore NH 2 -MIL-53(Al) (112.75 mg/g). Further, the kinetic experiment also revealed that nearly 90 % Hg(II) can be captured within 60 min for NH 2 -MIL-53(Al)-LP. Advanced characterizations and density functional theory calculations demonstrated that the strong coordination of the amino and oxygen centers on NH 2 -MIL-53(Al)-LP to Hg(II). Importantly, molecular dynamic simulation verified the gate opening effect of NH 2 -MIL-53(Al)-LP, as the faster diffusivity of Hg(II) ions in NH 2 -MIL-53(Al)-LP was observed. This work provides another opportunity in designing the pore geometry of porous materials for water remediation.
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TALANTA
·
2024
·
IF 5.6
Shengyuan Zhang,Haiyan Li,Dezhi Yang,Yaling Yang
In the present research, Fe-based metal-organic frameworks (MIL-101(Fe)–NH 2 ) nanoparticles were synthesized by simple solvothermal methods and used to assay Cr(Ⅵ). The MIL-101(Fe)–NH 2 performs dual functions: the 2-aminoterephthalic acid (NH 2 -BDC) ligand endows a strong fluorescence emission, and the Fe metal nodes are able to facilitate the oxidation of 3,3′,5,5′- tetramethylbenzidine (TMB) directly, resulting in the generation of oxidized-TMB (ox-TMB). Our research results showed that reducing agents such as ascorbic acid (AA) can collapse the structures of MIL-101(Fe)–NH 2 because of the reduction of Fe 3+ by AA, resulting in release of NH 2 -BDC. In the presence of Cr(Ⅵ), the fluorescence intensity of the MIL-101(Fe)–NH 2 + AA system will be decreased due to the competitive reduction of Fe 3+ and Cr(Ⅵ). Nevertheless, Cr(Ⅵ) can significantly accelerate the oxidation of TMB by MIL-101(Fe)–NH 2 as it boosts the electron transfer rate between Fe 3+ and Fe 2+ . Therefore, a fluorescent/colorimetric dual-mode platform was developed for the detection of Cr(Ⅵ) with an extensive linear range (7.5–750 μg/L and 13.3–1000 μg/L) as well as a remarkably low detection limit (0.99 μg/L and 1.98 μg/L). This MOF with the ability to release ligands not only provides inspiration for the design of new luminescent materials, but also offers a novel and reliable solution for the detection of Cr(Ⅵ).
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Miaomiao Chen,Huili Zhao,Han Xue,Yan Liang,Min Ji,Min Wang
B(C6F5)3-based frustrated Lewis pairs (FLPs) have made remarkable progress in metal-free catalytic reduction. However, the high affinity of B(C6F5)3 for oxygen makes it susceptible to irreversible poisoning when exposed to H2O, limiting its widespread application in reductive amination. To overcome the influence of H2O, a hydrophobic catalyst, B(C6F5)3@Rn–1-MIL-101 (n = 3, 5, 7), was developed by confining B(C6F5)3 within the nanocages of metal–organic frameworks (MOFs) modified with alkyl chains. The hydrophobic strength of the catalyst could be adjusted by varying the length of the alkyl chain. At n = 3, the alkyl chain was too short to be hydrophobic, while the excessively long alkyl chain blocked the pore channels and adversely affected the loading of B(C6F5)3 at n = 7. Only the catalyst B(C6F5)3@R4-MIL-101 synthesized at n = 5 could effectively facilitate the reductive amination of aldehydes or ketones with amines in a “wet solvent.” The strategy of combining hydrophobic MOFs with B(C6F5)3 to prepare heterogeneous catalysts for FLP catalysis not only provides a fresh avenue for investigating catalytic systems for reductive amination but also represents an innovative approach to advancing FLP chemistry.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Huiyuan Cheng,Jingwei Hu,Zihan Liu,Guangping Lei,Guojun Xi,Yayun Zhang,Hantao Liu,Xuhuan Guo,Huiyun Ren
Developing novel adsorbents for CO 2 capture and separation offers an efficient approach to relieving global environmental problems. To promote CO 2 capture from flue gas, novel Cr 3 O@MIL-101(Cr) composites was synthesized through packing [Cr 3 O(HCOO) 6 (H 2 O) 3 ]NO 3 into MIL-101(Cr) cages. The resultant composite Cr 3 O@MIL-101(Cr) presents higher CO 2 uptakes at lower pressure ranges, benefiting from the increased content of unsaturated Cr(III) ions and micropores relative to MIL-101(Cr). Meanwhile, IAST selectivity for CO 2 /N 2 mixture reached 50.2 under standard temperature and pressure, outperforming most of the reported materials. Further GCMC simulations reveal that the synergistic effect of [Cr 3 O(HCOO) 6 (H 2 O) 3 ] + , NO 3 − and MIL-101 (Cr) could effectively facilitate the interactions with CO 2 molecules and hinder N 2 molecules from approaching the optimal adsorption sites. Thus the [Cr 3 O(HCOO) 6 (H 2 O) 3 ]NO 3 encapsulated MIL-101(Cr) can be recommended as a promising adsorbent for superior CO 2 /N 2 separation.
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LANGMUIR
·
2025
·
IF 3.9
Huining Lan,Jingge Niu,Tianshu Luo,Louqun Wang,Xiaohong Hou
Biological antioxidants play a crucial role in numerous disease-related biological processes, which has led to significant interest in their identification. In this research, a colorimetric sensor array was created. It uses MIL-53 (Fe, Mn) nanozymes to simultaneously detect multiple antioxidants. The bimetallic nanozymes, MIL-53(Fe, Mn), were synthesized by using a solvent-thermal method. This framework demonstrated notable oxidase-like catalytic ability. In particular, it facilitates the conversion of colorless TMB to a blue compound under different pH conditions. When antioxidants were introduced into the reaction system, the sensor array exhibited cross-reactivity, resulting in distinct color signals. Linear discriminant analysis (LDA) was successfully utilized to precisely identify the different concentrations of cysteine (CYS), glutathione (GSH), dopamine (DA), and ascorbic acid (AA) and their combinations. This method enabled accurate determination of the amounts of these substances both individually and in mixtures, providing a reliable way to analyze their concentrations in an experimental context. Furthermore, the prepared sensor array combined with the smartphone successfully distinguished the target antioxidants in the serum. The proposed sensing method would be expected to have practical applications in diagnosis.
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BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Yajun Gao,Suhui Xu,Ge Guo,Yajie Li,Wenyuan Zhou,Huaxiang Li,Zhenquan Yang
Herein, novel nanozyme mimics MoO 3 /MIL-125-NH 2 were reported and conjugated with bacteriophages as a new electrochemical probe for high sensitivity and specific electrochemical detection of staphylococcus aureus . The excellent peroxidase-like activity of MoO 3 /MIL-125-NH 2 composites was attributed to the integration of MIL-125-NH 2 with MoO 3 , which can boost the generation of superoxide radicals (O• 2 – ) and thus promote the oxidation of TMB in the presence of H 2 O 2 . In this work, two bacteriophages named SapYZU04 and SapYZU10 were isolated from sewage samples by using staphylococcus aureus YZUsa12 as the host. In comparison, MoO 3 /MIL-125-NH 2 @SapYZU04 was selected as a recognition agent. The DPV current declined linearly with staphylococcus aureus YZUsa12 concentration in the range of 10 1 −10 8 CFU mL −1 , with a low detection limit of 16 CFU mL −1 (S/N = 3). 20 strains including 13 host strains and 7 non-host strains were used to evaluate the selectivity of the proposed sensor. Regardless of the differences in the degrees of lytic performance for phage SapYZU04, all selected host strains can be screened with merely the same DPV current. Host spectrum-oriented bacteriophage sensing is of great importance for the practical application of bacteriophage-based biosensors in the future.
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DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 10
·3417-3424
·
IF 4.099
Huairu Tian,Jun Peng,Qiuzheng Du,Xuanhong Hui,Hua He
A novel, rapid and simple method is described for the synthesis of magnetic MIL-100(Fe) with novel Fe3O4 morphology, which significantly improved the sustainability of conventional fabrication processes in several aspects. The magnetic MOFs were prepared (i) in one pot (instead of multiple steps), (ii) at room temperature (instead of temperatures over 150 °C), (iii) within a few hours with excellent yield (instead of in few days with low productivity) and (iv) in the absence of any corrosive inorganic acid and organic reagent. The materials were tested in the industrially demanded photocatalytic and photo-Fenton degradation of sodium sulfadiazine. The degradation results indicated that the Fe3O4 nanorods could accelerate the catalytic efficiency. The catalyst would be of potential application due to its stable catalytic activity in repeated reaction cycles and no need for regeneration. Therefore, the MIL-100(Fe) and magnetic MIL-100(Fe) proposed in this study are ideal catalysts for the heterogeneous degradation of sodium sulfadiazine.
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WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 5
·1-17
·
IF 3.8
Zhou Zhuyou,Ji Yufeng,Wang Yong,Liu Menghe,Xu Ying,Liu Ruijie,Yang Mingjie,Zou Congyang
In this study, the carbon-doped bimetallic organic framework C 60 /MIL-101(Fe,Cu) catalyst was prepared for the first time via solvothermal synthesis method. The catalysts were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and a series of other instruments. At the same time, methylene blue (MB) was used as the target degradation material to investigate the catalytic performance of H 2 O 2 for MB degradation under visible light. The degradation experiment showed that the removal rate of C 60 /MIL-101(Fe,Cu) to MB reached 99.2% within 80 min. Furthermore, cyclic experiments demonstrated good stability and reusability of the catalyst. Finally, the degradation mechanism of the reaction was deduced by quenching experiment, UV–vis diffuse reflection and mott-Schottky plots. The results show that hydroxyl radical (·OH) and superoxide radical (·O 2 − ) play a major role in the degradation of MB during photo-Fenton process.
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