MATERIALS CHEMISTRY AND PHYSICS
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2020
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IF 3.408
Yanan Dong,Tianding Hu,Manoj Pudukudy,Hongying Su,Lihong Jiang,Shaoyun Shan,Qingming Jia
In this paper, the effect of conventional solvothermal and a microwave-assisted method for the synthesis of MIL-101(Fe) and NH 2 -MIL-101(Fe) as adsorbents for the removal of tetracycline in wastewater is reported for the first time. The results had shown that the microwave treatment led to a significant reduction in the material synthesis time, which greatly saved the energy. It was also found that the microwave-assisted synthesized material exhibited small particle size, high specific surface area and better adsorption capacity. The introduction of amino group further enhanced the adsorption capacity of MIL-101(Fe). The adsorption capacity of MIL-101(Fe) and NH 2 -MIL-101(Fe) samples for tetracycline adsorption by microwave assisted synthesis method reached up to 332 mg/g and 378 mg/g, respectively. Moreover, the adsorption isotherm was well-fit with Freundlich model, indicating a multilayer adsorption . The kinetic studies indicated that the reaction followed pseudo second-order reaction kinetics with a best fit to the theoretical value. Due to the higher adsorption efficiency and lower energy consumption of the synthesis, the as-prepared microwave assisted materials could be used as potential adsorbents for different pollutants in wastewater.
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
JOURNAL OF SOLID STATE CHEMISTRY
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2022
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IF 3.656
Lijun Guo,Feifei Li,Jianxin Liu,Rui Li,Zhuobin Yu,Qing Xi,Lulu Zhang,Yaru Li,Caimei Fan
Morphology regulation is a simple way to improve photocatalytic activity. In this work, a MIL-101(Fe) photocatalyst with cracked spindle morphology has been successfully prepared by EG pre-coordination solvothermal method . The cracking degree of MIL-101(Fe) can be regulated by adjusting pre-coordination time. The MIL-101(Fe) with the optimal uniform crack displays a best NH 3 evolution rate of 592 μmol h −1 g −1 under the visible light irradiation . Cracked MIL-101(Fe) is similar to a semi-exposed model, which can increase the number of reactive sites, improve refraction and reflection of light, and ultimately enhance the photocatalytic nitrogen fixation activity. This work developed a convenient strategy to improve the photocatalytic activity of nitrogen reduction by controlling morphology.
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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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 20
·9185-9195
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IF 2.7
Shikai Xue,Dongying Zhu,Qing Zuo,Shuangfeng Yang,Haiyan Wang,Qiujun Lu,Guoxing Yin,Guihua Ruan,Fuyou Du
A novel MIL-101(Fe)/ZnCrZr-LBMO heterojunction was successfully constructed and used for the removal of ciprofloxacin (CIP) in this work. The MIL-101(Fe)/ZnCrZr-LBMO composite exhibited significantly enhanced photocatalytic degradation activity, with reaction rates approximately 3.4 and 3.1 times faster than those observed with pristine MIL-101(Fe) and ZnCrZr-LBMO, respectively. The effect of different amounts of ZnCrZr-LBMO, sample pH, CIP concentration, inorganic cations, and anions on CIP removal was investigated, and the possible intermediates and degradation pathways of CIP were speculated. The·O2− radicals dominated CIP degradation, with minor contributions from 1O2, h+, and ·OH radicals. The composite exhibited high removal rates for CIP (94.7%), ofloxacin (86.8%), and tetracycline (96.3%), respectively, within 60 min of light irradiation, and excellent reusability, retaining over 85.1% CIP degradation rate after five cycles. Our work provides a new reference to construct highly efficient and easily recyclable MIL-101(Fe)/ZnCrZr-LBMO photocatalysts for the removal of antibiotic pollutants, promising advancements in real water treatment applications.
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
LANGMUIR
·
2024
·
IF 3.7
Zeqi Wu,Feng Niu,Wenhao Yao,Siyuan Gao,Da Chen,Yuexiang Huang
The activation of an inert C(sp3)–H bond in selective oxidation of hydrocarbons under mild conditions is a critical and challenging process. Herein, we report a stable chlorine-coordinated metal–organic framework (MOF) photocatalyst, MIL-101(Fe), for efficient visible-light-driven photocatalytic selective oxidation of toluene to benzaldehyde in air under ambient conditions. Encouragingly, a benzaldehyde formation yield of 3.11 mmol·g–1·h–1 with a selectivity of 92.1% is achieved in 5 h, which is superior to most of the reported works. Based on the experimental results and characterizations, the high catalytic performance is mainly due to the promoted rate-limiting step of C(sp3)–H bond activation by a chlorine radical (Cl·) from the coordinated −Cl in the MIL-101(Fe) structure. In addition, the present photocatalyst possesses good substrate tolerance for photocatalytic selective oxidation of various toluene derivatives under optimized conditions.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
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2025
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IF 3.2
Rui Guofen,Hu Zihao,Wu Huiqi,Ma Jianfeng
Composites of MIL-101(Fe)/CoFe 2 O 4 were prepared by a simple solvothermal approach and these composites were explored for tetracycline (TC) degradation by using light and persulfate (PS). MIL-101(Fe)/CoFe 2 O 4 catalyst showed superior catalytic performance when combined with photocatalysis and chemical catalysis. Experimental results suggest that the degradation efficiency reached 83% within 40 min. The TC adsorption ability of MIL-101(Fe)/CoFe 2 O 4 was tightly associated with pH, which can be interpreted through isoelectric point. Oxygen-active species, containing singlet oxygen ( 1 O 2 ) or superoxide radicals (O· 2‾), were also generated when there was dissolved oxygen, which could decompose the TC organic contaminant in solution. To be specific, MIL-101(Fe)/CoFe 2 O 4 /PS/Vis catalytic system was capable of eliminating TC through forming h + , 1 O 2 , O· 2‾, hydroxyl radicals (·OH) and sulfate radicals (·SO 4 ‾) species. Moreover, MIL-101(Fe)/CoFe 2 O 4 composite material showed outstanding stability.
研究领域:
环境科学
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催化材料
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2024
·Vol. 25
·期 18
·9855
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IF 4.9
Yiting Luo,Rongkui Su
Tetracycline’s accumulation in the environment poses threats to human health and the ecological balance, necessitating efficient and rapid removal methods. Novel porous metal–organic framework (MOF) materials have garnered significant attention in academia due to their distinctive characteristics. This paper focuses on studying the adsorption and removal performance of amino-modified MIL-101(Fe) materials towards tetracycline, along with their adsorption mechanisms. The main research objectives and conclusions are as follows: (1) NH2-MIL-101(Fe) MOF materials were successfully synthesized via the solvothermal method, confirmed through various characterization techniques including XRD, FT-IR, SEM, EDS, XPS, BET, and TGA. (2) NH2-MIL-101(Fe) exhibited a 40% enhancement in tetracycline adsorption performance compared to MIL-101(Fe), primarily through chemical adsorption following pseudo-second-order kinetics. The adsorption process conformed well to Freundlich isotherm models, indicating multilayer and heterogeneous adsorption characteristics. Thermodynamic analysis revealed the adsorption process as a spontaneous endothermic reaction. (3) An increased adsorbent dosage and temperature correspondingly improved NH2-MIL-101(Fe)’s adsorption efficiency, with optimal performance observed under neutral pH conditions. These findings provide new strategies for the effective removal of tetracycline from the environment, thus holding significant implications for environmental protection.
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
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Mingyang Xiong,Yao Zeng,Ruisi Qiu,Hongxing He,Yi Zhang,Zhifeng Nie,Bing Wang
Bisphenol A (BPA) is extensively utilized as an industrial chemical in the production of certain plastics and epoxy resins. They are frequently found in environmental water and have the potential to cause risks to both the environment and human health. To efficiently remove the endocrine disruptor BPA from aqueous solutions, sea urchin-like magnetic material Fe3O4@PDA@NH2-MIL-101 (Fe) was synthesized via hydrothermal methods. Fe3O4@PDA@NH2-MIL-101 (Fe) has excellent adsorption performance, with a theoretical maximum adsorption capacity of 300.47 mg/g for BPA. The adsorption kinetics of BPA by Fe3O4@PDA@NH2-MIL-101 (Fe) followed the pseudo-second-order kinetic model and Liu’s isotherm model. Magnetic separation experiments reveal a high recovery efficiency, maintaining 94.82% of its initial adsorption capacity after five cycles. The primary adsorption mechanisms of Fe3O4@PDA@NH2-MIL-101 (Fe) on BPA included pore filling, hydrogen bonding, π–π interaction, and Lewis acid–base interaction. Additionally, the material showed excellent removal performance of BPA, with a maximum adsorbed amount of 135.27 mg/g for total organic carbon (TOC) in the shale gas fracturing flowback fluid. These findings suggest that Fe3O4@PDA@NH2-MIL-101 (Fe) holds significant potential as an adsorbent for BPA removal from actual wastewater, offering promising prospects for practical applications.
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
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Hao Wang,Renting Huang,Wei Mao,Hao Xu,Chutong Ling,Junru Zhao,Fan Yi,Yongxin Zhou,Jinghong Zhou
Iron-based metal-organic frameworks (MOFs) represent a potentially important tool for controlling organic pollutants . However, the structural stability of most iron-based MOFs in the aqueous environment is limited. Therefore, this study sought to improve the aqueous stability and photocatalytic activity of MIL-101(Fe) using an in-situ modification strategy. A novel and highly water-stable MIL-101(Fe)@IPA 4 was prepared using ligand regulation. Owing to the in-situ modification effect, MIL-101(Fe)@IPA 4 exhibited remarkable hydrophobicity with a water contact angle at 102.4° while maintaining minimal leaching of iron ions (0.46 mg/L), even after five cycles of photocatalysis . Under MIL-101(Fe)@IPA 4 /UV/H 2 O 2 conditions, the removal rates of ciprofloxacin and total organic carbon reached 100% and 49.16%, respectively, within 60 min. These researches suggest that introducing IPA improves the light absorption properties of MIL-101(Fe)@IPA 4 and facilitates electron-hole separation, thereby promoting the generation of active species. The ecotoxicity assessment of major degradation intermediates of ciprofloxacin was conducted using the ECOSAR system. Our findings provide novel insights for enhancing the water stability of iron-based MOFs through an in-situ modification strategy, which is crucial for pollution control efforts.
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
Frontiers in Chemistry
·
2021
·
IF 5.221
Zhang Hui,Zhou Liang,Li Jing,Rong Sijia,Jiang Jianping,Liu Shengquan
Herein, we report a novel carboxymethyl cellulose (CMC)/MIL-101 (Fe)/poly(β-cyclodextrin) (β-CDP) hydrogel with high photocatalytic activity. β-CDP can significantly enhance the photoactivity of MIL-101(Fe) in the hydrogel prepared by a simple solvothermal method. The structure and property of this composite hydrogel were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Tetracycline was selected as a model pharmaceutical antibiotic to evaluate the photocatalytic activity of the composite hydrogel under visible light irradiation and darkness, respectively. This composite hydrogel shows excellent activity for degrading pharmaceutical antibiotics under visible light irradiation. The increased photocatalytic activity can be attributed to β-CDP, which acts as a promoter and affords an efficient separation of photogenerated electron-hole pairs of MIL-101(Fe). Moreover, the composite hydrogel is shown to have good water retainability. The hydrogel is inexpensive and shows high photocatalytic activity. Hence, it can be used as an efficient photocatalytic material.
研究领域:
环境科学
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材料科学
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药学
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
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IF 5.7
Qian Cheng,Xiaohan Liu,Chuhan Huang,Hongman Sun,Fazle Subhan,Xinyi Zhou,Yuankai Liu,JiaHui Yang,Qi Li,Youhe Wang,Zifeng Yan
Recently, there has been a growing interest in the fundamental understanding of the mechanism of how MIL-101(Fe)/g-C 3 N 4 heterojunctions facilitate the occurrence of photocatalytic nitrogen fixation reactions, especially the electron transfer mechanism has attained increasing attention in photocatalysis. Herein, we implemented a "triple win scenario" strategy to fabricate the S-scheme MIL-101(Fe)/g-C 3 N 4 heterojunction through a straightforward solvothermal process. The MC-6 heterojunction minimizes the recombination of photogenerated carriers, enhances light utilization efficiency, and activates the N≡N bond, thus boosting photocatalytic nitrogen fixation efficiency. The transition metal iron activates the N≡N bond, while S-scheme heterojunctions reduce the photogenerated carrier recombination. In addition, the decrease in band gap (E g ) leads to an increase in visible light utilization efficiency. ISIXPS proved the mechanism of interelectron transfer of MIL-101(Fe)/g-C 3 N 4 heterojunction under illumination. Upon the creation of the heterojunction, electrons migrate from g-C 3 N 4 to MIL-101(Fe), establishing an inherent electric field due to the disparate Fermi levels between the two materials. The electrons (e - ) on the g-C 3 N 4 CB with a more negative reduction potential and the holes ( h + ) on the MIL-101(Fe) VB are retained, which increased the redox capacity to a great extent required for the reduction of N 2 to NH 3 . The ammonia production efficiency of MC-6 photocatalyst was 160 µmol g cat -1 h -1 , representing an 8-fold and 2.8-fold improvement over pristine g-C 3 N 4 (20 µmol g cat -1 h -1 ) and MIL-101(Fe) (57 µmol g cat -1 h -1 ), respectively.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Sa Liu,Yapeng Chen,XinKuan Li,Yijia Yao,Huashan Wang,Meiyi Wang
Food packaging films containing antimicrobial reagents play a crucial role in preventing bacterial-induced fruit decay. This study proposes a bilayer film consisting of an internal amino-modified starch hydrophilic layer and an external amino-modified polyvinyl alcohol/polylactic acid hydrophobic layer, embedding alliin@MIL-101(Fe) as an antibacterial agent, utilizing the pH reduction of fruit decay sites to achieve pH-responsive release, enhancing antibacterial performance. Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analyses confirm successful crosslinking between amino and aldehyde groups, resulting in the formation of imine bonds and a mesh-like structure conducive to adsorption. Under acidic conditions, the cumulative release rate of alliin reached 74 % within 36 h. Compared to a simple mixture, the tensile strength of the alliin@MIL/NST-NPVA/PLA film reached 34.771 MPa, and transmittance in the wavelength range of 200–370 nm decreased to 0. The scavenging rate of DPPH free radicals in the film can reach 83 %. In addition, the water vapor permeability and oxygen permeability of the film are approximately 7.62 × 10 −16 [g/ (m 2 ‧24 h‧0.1 mm)] and 6.83 (m 2 ‧24 h‧0.1 MPa), respectively; moisture content and water solubility decreased to 10.99 % and 20.77 %. This composite film extended the shelf life of strawberries from 2 to 7 days, significantly enhancing freshness.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
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.
研究领域:
分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
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