CHEMISTRY AND ECOLOGY
·
2024
·
IF 1.3
Zhenpeng Li,Dongmei Yan,Jun Li,Ziwei Mai,Fuchuan Huang
Hexavalent chromium (Cr(VI)) is regarded as a water pollutant because of its high toxicity in aquatic environments. In this study, polyethyleneimine-functionalised NH2-MIL-101(Cr) (PEI@NH2-MIL-101(Cr)) was fabricated by a facile wet impregnation method, and its effectiveness at removing Cr(VI) from wastewater was systematically investigated. As suggested by the experimental findings, pH was a significant determinant of Cr(VI) uptake by the fabricated PEI@NH2-MIL-101(Cr). Preferable depiction of adsorption system was achievable with the Langmuir adsorption model and the pseudo-order 2 kinetic model. At 288, 298, and 308 K, the highest adsorbability values were 241.55, 310.56, and 408.16 mg g−1, respectively. Processes like electrostatic attraction, reduction and chelation helped promote the Cr(VI) elimination. SO42− ions had a relatively large impact on the Cr(VI) adsorption compared with other coexisting ions such as NO3−, Cl− and H2PO4−1. Because of its properties of high adsorption capacity and Cr(VI) detoxification, the potential of PEI@NH2-MIL-101(Cr) in the Cr(VI) elimination from wastewater appears to be promising.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yunqi Zhou,Ye Yuan,Xinlei Liu,Zhi Wang
Metal-organic framework (MOF) membranes with proper pore size distribution and functional groups are generally more suitable for separation. Most MOFs are characterized by a hierarchical pore structure, which possesses large cavities surrounded by small windows. Fabrication of MOF membranes only retaining microporous fragment structure is a workable method to narrow pore size distribution. In this study, well-grown NH 2 -MIL-101(Cr) fragment membranes were fabricated for CO 2 separation by adjusting acetic acid – ligand – metal ratio to balance the nucleation and growth. NH 2 -MIL-101(Cr) fragment has a similar chemical structure to NH 2 -MIL-101(Cr) as expected, but only small pores with size around 0.56 nm is retained. The NH 2 -MIL-101(Cr) fragment membranes exhibited CO 2 /N 2 selectivity of about 37 with CO 2 permeance up to 6104 GPU.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 18
·9855
·
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
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2022
·Vol. 46
·期 4
·738-746
·
IF 2.215
Youhua Zhang,Linhai Duan,Ping Yang,Dan Zhang,Xiuhong Meng
Deactivation of Pd-Cr bimetallic nanopaticles supported on NH 2 -functionalized MIL-101 in dehydrogenation of formic acid is studied. Results show that the catalyst cannot be reused more than three times because the concentration of carbon monoxide in the gaseous product will exceed 10 ppm. When the catalyst is used for the first time, the turnover frequency of the active metal Pd is the highest. With an increase of catalyst utilization times, the turnover frequency decreases. The reason for the reduction in catalyst activity is agglomeration of Pd and Cr atoms on the outer surface of the catalyst, not because the active component, Pd, is being lost.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
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
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Huifang Feng,Yitong Sun,Qiaozhen Xu,Hong Liu
Developing efficient photocatalyst to promote the conversion of CO 2 into value-added chemicals remains challenging. Here, novel NH 2 -MIL-101(Fe)@Bi 2 MoO 6 S-scheme heterojunctions were fabricated via a solvothermal method, in which Bi 2 MoO 6 (BMO) nanoparticles uniformly growing on the NH 2 -MIL-101(Fe) (NM101) octahedrons with intimate contact interface. The resultant heterojunctions revealed significantly enhanced activity for CO 2 photoreduction. The optimal performance was achieved when the content of BMO was 10 wt%, and the formation rate of CO reached 67.0 μmol·g −1 ·h −1 under visible light illumination (with apparent quantum efficiency of 0.09 % at 450 nm), which was 3.2-fold of individual NM101. The boosting activity benefited from the formation of S-scheme heterojunction at the NM101 @BMO interfaces, which facilitated the separation of photoinduced electron-hole pairs with strong redox ability at the interface. This S-scheme charge transfer mechanism was further validated by the in-situ XPS and fluorescence probe molecular experiment. Besides, the intermediates and preliminary mechanism of photoreaction were unraveled based on in-situ DRIFTS analysis. This work provides some novel insights for designing efficient S-scheme photocatalysts for CO 2 photoreduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shiyu Zhang,Qiuyu Qiao,Yangfeng Wen,Kena Ren,Xiaoyu Ma,Haisheng Tao
A novel composite of acetic acid-modulated AC-NH 2 -MIL-101(Fe) was prepared by mild chemistry . The catalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), Brunaure-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). Acetic acid can control the crystal size, so that the catalyst had a large specific surface area (99.35 m 2 ·g −1 ) and pore size (0.13 cm 3 ·g −1 ), the adsorption amount of Rhodamine B (RhB) up to 446.965 mg·g −1 , after the addition of peroxydisulfate (PDS), the catalytic degradation efficiency of RhB was as high as 99.7%. Electronic paramagnetic resonance spectrometer (EPR) and quenching experiments showed that the catalytic process may involve radical (·OH, SO 4 -· and O 2 ·- ) and non-radical ( 1 O 2 ) processes, in which the contribution of 1 O 2 to degradation reached 63.55% and played a major role.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 151
·期 9
·2560-2569
·
IF 3.186
Han Jishu,Wang Ying,Liu Ying,Bai Jiayu,Zhao Ruiyang,Wang Lei
In this paper, novel CdSe/NH 2 -MIL-101(Cr) nanocomposites for photocatalytic hydrogen production were synthesized. When the prepared NH 2 -MIL-101(Cr) MOFs were modified with CdSe QDs, the photocatalytic hydrogen production amount was significantly increased and reached to 17,664 μmol g −1 in 7 h. The formation of CdSe/NH 2 -MIL-101(Cr) nanocomposites enhanced the light absorption intensity, broadened the visible light absorption range, promoted the transfer of photogenerated electrons and inhibited the recombination of photogenerated electron–hole pairs, then effectively improved the photocatalytic hydrogen production performance. In addition, the CdSe/NH 2 -MIL-101(Cr) nanocomposites exhibited high cycle stability, which was beneficial to the practical application in photocatalytic hydrogen production. Graphic Abstract
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jingyu Cai,Junjie Shi,Jian Zhang,Xiaoyu Miao,Sen Wang,Longqiang Xiao,Dan Liu,Linxi Hou
Electronic-grade isopropyl alcohol is widely utilized in the cleaning of semiconductors and microelectronic components. Removing ions like Pb2+ is crucial since the presence of impurities may cause degradation of electronics, increased failure rates, and short circuits. Membrane materials offer a number of advantages in the field of adsorption separation; however, the lack of adsorption sites results in limited adsorption capacity. In the current work, guanidino-grafted NH2-MIL-101(Fe) was incorporated into polyvinylidene fluoride (PVDF) to prepare MOF/PVDF mixed matrix membranes (NM/PVDF) for the removal of Pb2+ from isopropanol. Benefiting from the larger specific surface area and more lone electron pairs in the guanidine group, the Pb2+ adsorption capacity of the as-prepared NM/PVDF membrane was 29.4458 mg/g, which was higher than that of the NH2-MIL-101(Fe)/PVDF membrane (20.9306 mg/g) and the pure PVDF membrane (6.7324 mg/g). The NM/PVDF membrane was able to reduce the concentration of Pb2+ from 500 to 86.73 ppb. This work highlights the potential of guanidine-grafted Fe-based MOFs/PVDF membranes as adsorbents for acquisition of electronic-grade solvents.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21029-21038
·
IF 9.931
Liang Zhang,Jing Wang,Xinyi Ren,Wentao Zhang,Tianshu Zhang,Xinnan Liu,Ting Du,Tao Li,Jianlong Wang
The excessive accumulation of toxic copper species makes it imperative to develop smart dual-functional materials for the simultaneous removal and detection of Cu(II) in drinking water. In this work, novel core–shell NH2-MIL-101(Al)@ZIF-8 nanoflowers were successfully fabricated via an internal extended growth mode under the regulation of polyvinylpyrrolidone (PVP) to achieve this goal. Benefiting from the specific affinity of imidazole nitrogen in ZIF-8 toward Cu(II), the resultant NH2-MIL-101(Al)@ZIF-8 shows high adsorption capacity (526.74 mg g−1). Moreover, the fluorescence of NH2-MIL-101(Al) shows a Cu(II)-dependent change, causing this composite to possess superior selective/sensitive detection with a broad linear range (1.5–625 μM) and a low detection limit (0.17 μM) for Cu(II). Specifically, the hybrid MOF@MOF structure provides greater sensitivity as compared to the individual constituent (pristine NH2-MIL-101(Al)) and the mixed state, which is ascribed to the rational optimization of the smart adsorbent based on the following two aspects. (i) The synergistic effect of the core–shell nanostructure improves the preconcentration ability at the interface between single MOFs. (ii) The existence of the three-dimensional hierarchical nanoflower architecture (structure optimization) accelerates the mass transport and sculpts the final composite with enhanced adsorption and detection ability. These indicate that the smart NH2-MIL-101(Al)@ZIF-8 nanoflower could be an excellent candidate for the synchronous remediation and selective detection of Cu(II) in aqueous systems, which could be potentially useful in wastewater treatment and water quality monitoring.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yuhang Ren,Yu Tian,Yating Lu,Dongyu Nie,Huayi Zhu,Xia Yang
Malathion (MA) is a widely used organophosphorus pesticide globally. Developing efficient photocatalysts is crucial for eliminating MA pollution in water by photocatalytic technology. This study focuses on preparing a series of H-PDI supermolecule/NH 2 -MIL-101(Fe) (PM) materials by amidating NH 2 -MIL-101(Fe) with the more stable H-PDI supermolecule, forming a covalent O C–NH bond. Among these materials, 40 %PM (indicating a mass percentage content of 40 % H-PDI supermolecule in PM) exhibited the best performance for degradation of MA. Under simulated sunlight irradiation of a 10 mg·L 1 MA solution for 180 min, the reaction rate constants of 40 %PM were 5.95 times and 3.13 times higher than those of NH 2 -MIL-101(Fe) and H-PDI supermolecule, respectively. The enhanced performance is attributed to the formation of Z-scheme heterojunctions in the 40 %PM composite lead to fast separation of photogenerated e − and h + . Combining the results of HPLC-MS with Fukui Function, the HOMO, LUMO, and pathway of degradation of MA attracted by 1 O 2 , •OH, and h + were speculated. The pathway involves oxidation, demethylation, P-S bond breakage, decarboxylation, and final conversion to some inorganic molecules. The toxicity of the degradation byproducts were lower than that of MA estimated by Toxicity Estimation Software Tool.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Qinzhi Wang,Zhan Shi,Zhi Wang,Yijian Zhao,Jianuo Li,Huifan Hu,Yaowen Bai,Zhihao Xu,Hui Zhangsun,Li Wang
Acid orange II (AO II), a typical azo pigment, is strictly controlled by legislation and prohibited in foodstuffs. Herein, we prepared gold nanoparticles decorated amino-functionalized Cr-based metal-organic frameworks [NH 2 -MIL-101(Cr)@Au] via an in-situ reduction method as a surface-enhanced Raman scattering (SERS) substrate for simultaneous adsorption and detection of AO II. Gold nanoparticles are uniformly dispersed on the surface of NH 2 -MIL-101(Cr) owing to its three-dimensional (3D) structure and the interaction between –NH 2 and Au ions , providing more SERS-active “hot spots”. These NH 2 -MIL-101(Cr)@Au nanocomposites exhibited selective and high adsorption performance (419.85 mg g −1 ) for AO II, and could be used as superior SERS substrates for the detection of AO II with a low limit of detection (LOD) of 0.05 mg L −1 and wide detection range of 0.05–50 mg L −1 using portable Raman spectrometer. Furthermore, this SERS assay has been successfully used to determine AO II in orange juice and chili powder with good sensitivities.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）