WATER ENVIRONMENT RESEARCH
·
2017
·Vol. 89
·期 7
·614-621
·
IF 0.91
Xinxin Yue,Weilin Guo,Xianghui Li,Xiaomei Gao,Guangyou Zhang
In this study, a novel composite containing an iron based metal-organic framework (MOF) and BiOBr was successfully synthesized by a simple method, and was fully characterized by X-ray diffraction patterns, Fourier transform infrared spectra, UV-vis diffuse reflectance spectra, and transmission electron microscopy. Moreover, the photocatalytic activities of BiOBr/MIL-88B(Fe) composites and the pure materials were evaluated by measuring the degradation of Rhodamine B under visible light. The results show that the composite exhibits better photocatalytic activities than pure materials, which can be ascribed to the high adsorption capacity of MIL-88B(Fe) and the enhanced separation of photogenerated charge carriers from assembly of MIL-88B(Fe) on BiOBr. And the effects of various operating parameters such as catalyst dosage, medium pH, the mass ratio of BiOBr, and MIL-88B(Fe) and the dye initial concentration on the degradation of RhB have been studied.
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NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Ziwei Zhao,Qi Ling,Shangkun Deng,Ziliang Li,Jianguo Lv,Lei Yang,Chunbin Cao,Zhaoqi Sun,Miao Zhang
A type II heterostructured BiVO4/MIL-88B(Fe) composite was successfully synthesised for the photocatalytic degradation of tetracycline hydrochloride (TC-HCl) by a simple hydrothermal method. Thin film materials avoid secondary pollution of powder materials. The samples were characterised by XRD, SEM, TEM, XPS, UV-Vis DRS, and PL. The samples were also characterised for their optoelectronic properties. 3-BV/MIL-88B(Fe) (3 mmol BiVO4) was the most effective catalyst for the degradation of TC-HCl, achieving 92.1% removal at 75 min with a degradation rate constant of 22.79 × 10−3 min−1. Moreover, durability evaluation and TC-HCl degradation potential evaluation were also performed. We looked into how TC-HCl concentration, pH and ions affect the degradation results. In order to determine the active ingredients, experiments for trapping free radicals and EPR tests were performed. The results indicated that the main active species were h+ and ˙OH. It is proposed that a reasonable type-II heterostructure can help to explain the photocatalytic mechanism. The current study creates a stable photocatalytic system by compositing electrocatalytic and photocatalytic materials to achieve efficient antibiotic degradation and provides a viable strategy for future applications.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiaolin Han,Nannan Wang,Wei Zhang,Xiaodong Liu,Qi Yu,Juying Lei,Lei Zhou,Guangli Xiu
In this work, the presence of ascorbic acid (AsA) in MIL-88B(Fe) / H 2 O 2 system was demonstrated to significantly increase the sulfamethoxazole (SMX) degradation efficiency. The SMX degradation rate in AsA/MIL-88B(Fe) / H 2 O 2 system was 0.177 L/(mg∙min), which was 60 times that of the MIL-88B(Fe) / H 2 O 2 system. Moreover, the study shows that AsA not only promotes SMX degradation in Fenton-like systems but also expands its pH application range. The effect of coexisting anions on the catalytic performance of the AsA/MIL-88B(Fe) / H 2 O 2 system was also investigated. Then, reactive species were detected via quenching experiments, which indicated •OH as the dominant free radical contributing to SMX degradation. Meanwhile, ESR determinations confirmed the existence of •OH and O2 − • in AsA/MIL-88B(Fe) / H 2 O 2 system. The high activity of the AsA/MIL-88B(Fe) / H 2 O 2 system was attributed to the effective surface Fe(III)/Fe(II) cycle promoted by AsA, and a possible mechanism of the AsA/MIL-88B(Fe) / H 2 O 2 system is proposed. The possible pathways for SMX and AsA degradation in the AsA/MIL-88B(Fe) / H 2 O 2 system are proposed based on the identified intermediates and the ecotoxicity analysis was conducted by ECOSAR . Finally, experimental results using the actual surface water and groundwater revealed the excellent availability of AsA/MIL-88B(Fe)/H 2 O 2 system in remediating SMX contaminated water . This study presents a novel, efficient Fenton-like system using AsA and iron-based metal-organic frameworks for sulfonamide removal from water.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·Vol. 27
·期 8
·4278-4289
·
IF 2.9
Ziyu Li,Mei Li,Rongsheng Xu,Zhiliang Jin
The electron transfer rate in photocatalysts is one of the factors determining their hydrogen production activity. In this work, NH2-MIL-88B(Fe) (NFM) was synthesized using a one-step hydrothermal synthesis method and NFM/GDY-25 (NFMG-25) was successfully synthesized by loading graphdiyne (GDY) onto the surface of NFM. The hydrogen production performance and the mechanism of the prepared photocatalysts were systematically investigated using XRD, SEM, FT-IR, XPS, UV-Vis, PL and photoelectrochemical tests. The results showed that the hydrogen production of NFMG-25 reached 61.7 μmol in 5 hours. Photoelectrochemical and Mott–Schottky tests demonstrated that the composite catalyst exhibited high photogenerated carrier separation efficiency and single catalysts were n-type semiconductors. The conduction bands of NFM and GDY were −0.36 V and −0.56 V, respectively, while the valence bands were 1.90 V and 1.12 V. NFM acted as an electron acceptor and donor, which accelerated the transfer of the electrons, and enhanced the photocatalytic hydrogen production efficiency of the composite system. This study provides an effective method for using NFM in photocatalytic hydrogen production.
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RSC Advances
·
2014
·Vol. 5
·期 10
·7253-7259
·
IF 3.708
Yuanlong Xiao,Xiangyu Guo,Hongliang Huang,Qingyuan Yang,Aisheng Huang,Chongli Zhong
A cheap and biocompatible metal–organic framework MIL-88B(Fe) (MIL = Material Institut Lavoisier) was synthesized and incorporated into Matrimid® 5218 to fabricate mixed-matrix membranes (MMMs) for gas separation. Separation performances of the MIL-88B(Fe)/Matrimid MMMs were tested for the single gas permeation of H2 and CH4 as well as the mixture gas separation of an equimolar binary H2–CH4 mixture. Due to the molecular sieving effect, the incorporation of MIL-88B(Fe) can enhance H2 permeability but hinder the transport of CH4 in MIL-88B(Fe)/Matrimid MMMs, thus resulting in enhanced separation selectivity of H2–CH4. At 298 K and ΔP = 3.0 bar, compared with those of a pure polymeric membrane, the H2 permeability and H2–CH4 mixture separation factor of MMMs with a MIL-88B(Fe) loading of 10% increased by 16% and 66%, respectively. In addition, the operation temperature has a significantly positive effect on the separation of a H2–CH4 mixture.
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Catalysts
·
2024
·Vol. 14
·期 8
·528
·
IF 3.8
Dongsheng Xiang,Zhihao Wang,Jingwen Xu,Hongdan Shen,Xiaodong Zhang,Ning Liu
Photocatalysts, such as TiO2, are widely used in photoreduction. However, drawbacks like their wide band gap and short carrier lifetime lead to lower efficiencies with their use. Introducing defects and forming heterostructures of TiO2could extend the carrier’s light-harvesting range from UV to visible light and enhance its lifetime. Herein, an electron-beam irradiation-defected TiO2was induced in MIL-88B(Fe). The structure of the material was characterized using XRD, FT-IR, TEM, HRTEM, and XPS techniques. Remarkably, TiO2under 300 kGy electron-beam irradiation performed the best with a series of 0, 100, 300, and 500 kGy irradiation ratios. PL and UV–vis DRS were utilized to measure the material’s optical properties. The introduction of MIL-88B(Fe) expanded the light response range, reduced the optical band gap, and lengthened the carrier lifetime of the defective TiO2composite photocatalysts, resulting in superior TC photoreduction capabilities of 88B5%300, which degraded 97% of tetracycline (10 mg/L) in water after 120 min.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shaoyan Zhang,Wen Zhang,Xinyao Zhao,Xin Li,Jian Wang,Ji Li,Yanqing Liu,Xueying Cheng,Renquan Guan,Junkai Zhang
This study reports the synthesis of MIL–88B(Fe)/Bi 3 O 4 Br, an efficient Z -scheme heterojunction photocatalyst for metronidazole (MNZ) degradation. The composite achieved a degradation efficiency of 95.2 % under visible light irradiation, outperforming the single-component catalysts (MIL–88B(Fe): 39.0 %, Bi 3 O 4 Br: 71.5 %). Photocatalytic treatment reduced biotoxicity, indicating its potential for use and environmental safety. The degradation process of MNZ was revealed by integrating LC–MS data with Fukui function analysis. Photoelectrochemical findings indicate that MIL–88B(Fe) enhanced efficiency, facilitated charge separation, and augmented the spectral response of Bi 3 O 4 Br. The Z–Scheme charge transfer and the function of the built–in electric field were validated by in situ XPS. DFT calculations revealed synergistic effects in the composite system, enhancing the adsorption and photocatalytic properties for MNZ. This study proposed a thorough degradation process that underpinned the development of effective photocatalysts.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 33
·期 1
·e4580
·
IF 3.581
Hongxu Guo,Baitong Niu,Xuemin Wu,Yi Zhang,Shaoming Ying
A nanostructured organic–inorganic framework, hexagonal NH 2 -MIL-88B, has been prepared through a facile one-pot reflux reaction and then it was characterized using various techniques. The as-prepared sample with high specific surface area (414 m 2 g −1 ) showed excellent adsorption for 2,4,6-trinitrophenol (TNP) in the liquid phase. Detailed studies of the adsorption kinetics, adsorption mechanism, adsorption isotherm, activation energy and various thermodynamic parameters were conducted. The adsorption mechanism of NH 2 -MIL-88B for TNP may be ascribed to hydrogen bond interaction, and the complexation between ─OH in TNP and unsaturated Fe(III) on the surface of NH 2 -MIL-88B. The maximum adsorption capacity of NH 2 -MIL-88B for TNP based on the Langmuir isotherm was 163.66 mg g −1 . The as-prepared NH 2 -MIL-88B adsorbent seems to be a promising material in practice for TNP removal from aqueous solution.
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RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2026
·Vol. 96
·期 9
·283
·
IF 1
Qing Yan,Chai Chunxiao,Li Kuan,Jiang Ye,Li Jingjing
MOF-based nanozymes are promising for colorimetric biosensing but are often limited by rigid coordination environments and poor active-site accessibility. Here, a 2-methylimidazole-regulated MIL-88B(Fe) nanozyme (2-MIM@MIL-88B) was prepared via an in situ coordination-competition strategy. Compared with pristine MIL-88B(Fe), 2-MIM@MIL-88B retained a spindle-like morphology but showed reduced crystallinity, nitrogen-containing species, pore-texture reorganization, and local Fe-site electronic modulation with increased defect-related centers. These changes correlated with enhanced peroxidase-like activity in the TMB-H 2 O 2 system, despite a reduced BET surface area. In a glucose oxidase-coupled colorimetric assay, 2-MIM@MIL-88B enabled glucose detection over 0.015–0.5 mM with a detection limit of 1.7 µM.
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CRYSTENGCOMM
·
2025
·Vol. 27
·期 5
·678-686
·
IF 2.6
Dongling Xie,Jianan Wang,Bo Huang,Yiyi Yang,Dunmin Lin,Chenggang Xu,Fengyu Xie
Rational design of viable routes to develop affordable and efficient oxygen evolution reaction (OER) catalysts is essential for advancing electrochemical water splitting, yet significant challenges remain, particularly in seawater. Here, we propose a ligand defect engineering strategy to modify the electronic structure of NH2-MIL-88B(Fe) using a monodentate ligand (acetic acid, AcOH), inducing ligand vacancies in NH2-MIL-88B(Fe) for oxygen evolution in an alkaline seawater electrolyte, thereby improving the performance of the electrocatalysts. The resulting defective MOFs (denoted as NH2-MIL-88B(Fe)-x) exhibited exceptionally high catalytic activity for OER, requiring low overpotentials of 313 and 329 mV at a current density of 100 mA cm−2 in 1 M KOH and simulated seawater (1 M KOH + 0.5 M NaCl) solutions, respectively. Experimental analyses revealed that the introduction of AcOH can modulate the d-band center of active sites in NH2-MIL-88B(Fe)-x and play a critical role in alleviating chloride ion (Cl−) corrosion, thereby enhancing catalytic stability in seawater. When directly used as an OER catalyst in an alkaline electrolyte, wind and solar power were harnessed to operate the NH2-MIL-88B(Fe)-x || Pt/C configuration to drive the electrolytic water reaction. Thus, the ligand defect strategy can be employed to design and prepare high-performance OER electrocatalysts, particularly for generating H2 through water electrolysis powered by renewable energy sources.
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IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 23
·38685-38692
·
IF 4.3
Shan Tang,Jingcai Xu,Xinqin Lu,Weijie Chen,Hongwei Chen,Bo Hong,Xinqing Wang
Metal-organic frameworks (MOFs) have potential applications in gas sensing due to their abundant porosity and unique surface properties. In this study, Fe2O3 hexagonal spindles (Hgs) derived from MIL-88B(Fe) were successfully prepared using an oil bath method, followed by calcination treatment at an optimized temperature of
$450~^{\circ }$
C. The high-purity porous Fe2O3 Hgs showed excellent acetone gas-sensing performance in the range of 0.4–50-ppm acetone concentration. The Fe2O3 Hgs-450 obtained the high sensing response (Ra/Rg =23,
$\tau _{\text {res}} =17$
s, and
$\tau _{\text {rec}} =2059$
s), excellent selectivity, and stability over 120 days to 10-ppm acetone at an operating temperature of
$220~^{\circ }$
C. The sensing response value was still 1.88 even at 0.4-ppm acetone and the theoretical detection limit (DL) was calculated to reach 3.59-ppb acetone. These excellent acetone gas-sensing properties were attributed to the uniform porous structure, abundant adsorbed oxygen, and small grain size of Fe2O3 Hgs, making them an excellent candidate for screening diabetic patients through exhaled gas analysis.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Shizhen Song,Tengfei Zheng,Bo Li,Hangcheng Yang,Qin-Xiang Jia,Zhuting Hao,Wen Zhang,Ying Zhang
Solvent vapor-driven soft actuators have been seen as promising devices for human-environment interaction and gained considerable attention in recent years. Considering the limited types of response solvent and the lack of quantification, MOF/polymer intelligent soft actuators may be a potential candidate of the fabrication of the bio solvent-driven actuators. Thus, this paper present a multiple solvent-driven soft actuator based on MIL-88B/PVDF asymmetric film, and also the comparison to the analogs based on other MIL-88(Fe) series flexible MOFs (including MIL-88A, 88C and 88D) was made for the deformation-structure relationship and the solvent-driven mechanism investigation. The deformation behavior to various organic solvent (including methanol, toluene and chloroform) of the MIL-88(Fe)/PVDF composite films have been investigated, and the structure and composition of the MIL88(Fe) fillers and the composite films were also characterized by SEM, FT-IR, and XRD. Based on the above results, the MIL-88B/PVDF composite which shows the diversity of response objects and the fast deformation response to most of the organic solvents through the solvent swelling/adsorption of the MOF skeleton, was used to fabricate a monolayer soft film composed by MIL-88B, carbon black (CB) and PVDF, namely MIL-88B/CB/PVDF. The MIL-88B/CB/PVDF film not only realizes the excellent deformation-discolor dual-responsive to methanol atmosphere with the visible deformation which could being quickly achieved within 1s under 10 vol % methanol atmosphere and the maximum crimp angle being up to 558o within about 50 s, and also a wide color change range including six view angle-dependent high saturation color (red, orange, yellow, green, blue and purple), but also shows an approximate linear relationship to three of the organic solvents (methanol, toluene and chloroform) between the maximum curl angle and the solvent concentration. Furthermore, several smart devices have also been fabricated, including the methanol-driven bionic petals, worm robot, alertor and LIG sensor. Therefore, such soft composites of flexible MOF and polymer have great potential in bio-robot and this work may provide new design strategy for the MOFs/polymer smart materials.
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