FOOD CHEMISTRY
·
2018
·
IF 4.946
Manshun Liu,Jing Wang,Qingfeng Yang,Na Hu,Wentao Zhang,Wenxin Zhu,Rong Wang,Yourui Suo,Jianlong Wang
Patulin (PAT) is one of the most common toxic contaminants of apple juice, which causes severe food safety issues throughout the apple industry. In order to remove PAT efficiently, a metal-organic framework-based adsorbent (UiO-66(NH 2 )@Au-Cys) was successfully synthesized and used for PAT removal from juice-pH simulation solution and real apple juice. Batch adsorption experiments were systematically performed to study the adsorption behavior for PAT. The results showed that adsorption process could be well described by the Pseudo-second order model and Freundlich isotherm model. The maximum adsorption capacity (4.38 µg/mg) was 10 times higher than the microbe-based biosorbents. Thermodynamic investigation demonstrated that adsorption process was spontaneous and endothermic. Furthermore, no marked cytotoxicity on NIH 3T3 cell lines was observed when the concentration of the adsorbent was lower than 10 μg/mL. Therefore, UiO-66(NH 2 )@Au-Cys is a potential adsorbent for PAT removal from apple juice with little quality changes.
研究领域:
食品安全
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生物化学
·
材料科学
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DOI
高影响因子
Science of Advanced Materials
·
2020
·Vol. 12
·期 7
·1078-1089
·
IF 1.117
Xu Hongna,Jin Liguo,Cheng Yan
Metal organic skeleton (MOFs) is a kind of porous material composed of metal ions and organic ligands through coordination, which can be used to absorb a lot of toxic substances from waste water. In this research, UiO-66, UiO-66(Zr) and UiO-66(Zr)–2COOH were synthesized by solvent
thermal method, and physical analysis was conducted on the adsorbent properties of the materials by means of XRD, IR, Zeta potential, etc. In the adsorption test of wastewater impurities, UiO-66(Zr)–2COOH was firstly taken as the research object. With the increase of the initial concentration
of hydrochloric acid, the adsorption capacity of the organic skeleton was greatly increased. However, when the concentration increases further, the growth rate of adsorption decreases, and with the increase of temperature, the adsorption decreases further. The organic skeleton of Hg(II) adsorption
process conforms to the secondary dynamic adsorption model. At the same time, the organic skeleton materials of Hg(II) has strong ability of recognition, the recognition of Hg(II) sex is much stronger than the Ni(II) identification. Uio-66(Zr) and UiO-66(Zr)–2COOH are selected for adsorption
of As, and the adsorption process of the two kinds of materials of As is close to the Freundlich model(III). The ability of absorbing As(III) of these materials is stronger than the ability of As(V). At the same time, UiO-66(Zr)–2COOH shows higher adsorption capacity on the As(III),
and maximum adsorption capacity is 220 mg/g.
研究领域:
材料科学
·
环境科学
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
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IF 2.8
Yu Liu,Yang Shen,Shusu Shen,Xiaoji Zhou,Ji Ma,Zhenfeng Lin,Yongfu Guo
MOFs (metal-organic frameworks) have been widely applied in membrane modifications. In this study, a polyvinylidene fluoride (PVDF) membrane substrate was initially functionalized with one typical MOF, UiO-66-NH 2 , through simple vacuum filtration, followed by the deposition of a trace amount of perfluorohexane (PFHx) sulfonate potassium, successfully preparing a novel composite membrane named UxP1. Incorporating UiO-66-NH 2 onto the hydrophobic PVDF significantly enhances both hydrophilicity and porosity. The trace deposition of PFHx introduced F groups, enhancing the oil-repellent properties of the membrane. The WCA of the U5P1 membrane (5 mg of UiO-66-NH 2 and 1 mg of PFHx) decreased from 68.4° to 25.4°, while the underwater oil contact angle (UWOCA) increased from 139.5° to 150.5°, resulting in a superhydrophilic and oleophobic surface. In oil–water emulsion separation experiments, U5P1 achieved an oil removal rate > 99% at an operating pressure of 0.085 MPa. In filtering wastewater containing Congo Red (CR) dye, the membrane exhibited a rejection > 99% and an impressive permeation flux of 1520 L m −2 h −1 , highlighting its outstanding separation efficiency. Moreover, during cyclic filtration experiments, U5P1 consistently maintained > 95% rejection at 0.085 MPa, and the FRR remained > 81%, demonstrating exceptional fouling resistance and rejection capabilities. This work provides a good basis for the advanced development of MOFs-modified membranes into efficient practical water treatment.
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高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Li Tan,Yanru Li,Qian Lv,Yuyan Gan,Yuan Fang,Yu Tang,Lizhi Wu,Yuanxing Fang
The conversion of CO 2 to valuable chemicals by photocatalysis has attracted widespread interesting. Owing to the linear structure of CO 2 molecule with strong C O bond, the surface reaction is considered as one of the main issues to restrict the conversion efficiency. Herein, soluble UiO-66 has been developed as co-catalyst to enhance the photocatalytic performance for CO 2 reduction. The soluble UiO-66 has presented the performance ca. 1.5 higher than the insoluble version, yielding 30.6 µmol/h for CO 2 to CO conversion by using 5.0 mg sample. This improvement can be attributed to the preserved framework by soluble UiO-66. Therefore, the chemisorption of CO 2 molecules can be improved, boosting the reduction reaction for CO production. This research provides a new path for a rational design of metal-organic framework (MOF) for photoredox catalysis, meanwhile inspiring advanced application of MOF catalysis with the soluble manner.
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 26
·期 6
·1831-1838
·
IF 1.947
Mutyala Suresh,Yu Ya-Dong,Jin Wei-Guang,Wang Zhi-Shuo,Zheng Deng-Yue,Ye Chun-Rong,Luo Binbin
Composite material, tetraethylenepentamine (TEPA) incorporated UiO-66 was prepared by impregnation method to study CO 2 capture in a fixed bed reactor, atmospheric pressure. All synthesized adsorbents were characterized using PXRD, N 2 adsorption–desorption isotherms, FT-IR, TGA, SEM, and Elemental analysis. Characterization results have revealed that incorporated TEPA was present within pores of UiO-66. CO 2 adsorption was higher on TEPA incorporated UiO-66 compared to UiO-66. It was due to the chemical interaction between –NH 2 and CO 2 . High CO 2 adsorption capacity 3.70 mmol g −1 was obtained on 30TEPA/UiO-66 at 75 °C, 1 bar. Because of more flexibility and high dispersive nature of TEPA at this temperature. The same CO 2 adsorption capacity was obtained in each adsorption cycle without decomposition of the amine on 30TEPA/UiO-66. Avrami adsorption kinetic model has suggested adsorption of CO 2 on composite material was chemical adsorption and deactivation model suggested an initial rate of adsorption was higher on TEPA incorporated UiO-66.
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RSC Advances
·
2017
·Vol. 7
·期 61
·38691-38698
·
IF 3.108
Bin Li,Wubin Wu,Tianyong Zhang,Shuang Jiang,Xingwei Chen,Guanghui Zhang,Xia Zhang
UiO-66 with high dispersibility and a cuboctahedron morphology was synthesized by an improved solvothermal method. The morphology of UiO-66 was adjusted using benzoic acid as a modulator. UiO-66 with a regular morphology was then used as the support to load ferrocene (Fc). A series of Fc@UiO-66 composites were prepared via a facile impregnation method. The composites were characterized by powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), SEM/EDX mapping, FT-IR, UV/vis, TG analysis, N2 adsorption–desorption, and X-ray photoelectron spectroscopy (XPS). The results showed that Fc was incorporated into UiO-66, thus preventing the agglomeration of Fc particles in water. The Fc@UiO-66 composites with a Fc loading of 5% (FU-5) exhibited the highest catalytic activity for hydroxylation of phenol with H2O2 at room temperature in water, which gave a phenol conversion of 38.5% and 87.4% selectivity for dihydroxybenzenes (DHB). UiO-66 played a crucial role in the enhancement of catalytic performance compared with conventional supports such as γ-Al2O3, etc. A hydroxyl radical mechanism was proposed for this catalytic hydroxylation process and the high selectivity was attributed to the interaction between Fc particles and UiO-66.
研究领域:
化学
·
催化材料科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 5
·1690-1697
·
IF 8.067
Mengmeng Cao,Chao Xia,Yunpeng Liu,Jinfeng Xia,Danyu Jiang,Guohong Zhou,Tongtong Xuan,Huili Li
Rapid and quantitative detection of nitrobenzene (NB) in wastewater is of great significance to protect the natural environment and human health. In this work, bifunctional Ln@Zr-MOFs based on UiO-66 were successfully fabricated by partially replacing terephthalic acid (H2BDC) ligands with m-phthalic acid (m-H2BDC) ligands and post-synthetic modification (PSM) with Ln3+ (Ln3+ = Eu3+, Tb3+). The “antenna effect” of the m-H2BDC ligands makes Ln@Zr-MOFs exhibit the characteristic emissions of Ln3+. By adjusting the amount and type of Ln3+, controllable color-tuning emissions can be easily realized, which endows them with a great application prospect for white LEDs. On the other hand, Eu10@Zr-MOFs can serve as a turn-off fluorescent switch of NB because the red emission from Eu3+ can be easily quenched by NB through a photoinduced electron transfer (PET) process between NB and its ligands, and as a result, NB is successfully recognized. Particularly, Eu10@Zr-MOFs as a fluorescent probe have shown many appealing properties, such as high sensitivity (limit of detection is 1.04 μM, limit of quantification is 3.48 μM, and Ksv = 24459.71 M−1), quick response (less than 60 s), a broad response window (0–180 μM), excellent selectivity, and strong anti-interference ability. The real detection results of NB concentration in natural water samples have demonstrated that the reported Eu10@Zr-MOFs are a potential fluorescent material that can precisely and sensitively perform fluorescence sensing of NB.
研究领域:
材料科学
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环境科学
·
光学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chengdeng Yang,Sheng Feng,Changchang Ma,Yun Zhou,Xiaojun Dai,Zhiwei Ye,Yang Wang
A series of Bi 2 Sn 2 O 7 /UiO-66-NH 2 nanoparticles were synthesized by in-situ solvothermal method as efficient adsorption and visible-light-driven photocatalysts for the removal of tetracycline（TC）. Among them, the BUN16 presents excellent adsorption and degradation ability for the TC, which is more than 3.6 times that of monomers . The adsorption-enhanced degradation mechanism of BUN16 nanomaterials was revealed via BET, XPS, Zeta potential , FT-IR, EPR, EIS and kinetic analysis, meanwhile the performance of removing TC decreased slightly after five cycles. The excellent catalytic performance can be attributed to its excellent adsorption capacity and the synergistic effect of the Z-type heterojunction charge transfer mechanism. This work provides a basic principle for the scientific construction of Z-type heterojunction materials with adsorption catalytic function to remove TC in actual wastewater.
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高影响因子
RSC Advances
·
2022
·Vol. 12
·期 10
·6083-6092
·
IF 4.036
Xia Chen,Yongjie Li,Qiang Fu,Hongyun Qin,Junnan Lv,Kun Yang,Qicheng Zhang,Hui Zhang,Ming Wang
The use of large amounts of deleterious solvents in the synthesis of metal–organic frameworks (MOFs) is one of the important factors limiting their application in industry. Herein, we present a detailed study of the synthesis of UiO-66, which was conducted with hydrobromic (HBr) acid as a modulator for the first time, at a high concentration of precursor solution (ZrCl4 and H2BDC, both 0.2 mol L−1). Powder crystals with atypical cuboctahedron structure were obtained which indicated that the HBr acid modulator played roles by competitive coordination and deprotonation modulation, thereby controlling the processes of nucleation and crystal growth. The properties of the obtained materials were systematically characterized and compared with those of materials synthesized with hydrofluoric (HF) acid and hydrochloric (HCl) acid modulators. Despite the high concentration of defectivity, the UiO-66 material synthesized with the HBr acid additive has the characteristics of larger specific surface area, excellent thermal stability and higher porosity in the structure. Besides that, the present protocol has the advantages of high reaction mass efficiency (RME), and feasibility of scalable synthesis, providing a facile and sustainable route to diverse Zr-based MOFs.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Xingxing Mao,Yanyang Wu,Xiaocheng Zhang,Yunqi Cai,Bin Wu,Kui Chen,Lijun Ji
The adsorption performances of durene (DR) and prehnitene (PR) (molar ratio of 1:1) by MIL-53(Cr), UiO-66, ZIF-8 and Cu-BTC at 298.15 K were evaluated by adsorption experiments and simulation with Grand-canonical Monte Carlo method . UiO-66 exhibited the highest selectivity for DR and PR. Thus UiO-66 was selected and taken as the adsorbent subsequently. The adsorption kinetics and thermodynamics of DR and PR were studied in detail. Studies on kinetics showed that the data could be correlated well by the pseudo-second-order kinetic mode. The adsorption isotherms conformed to the Langmuir isotherm. The adsorption processes were spontaneous and exothermic. The adsorption capacity of DR was lower than that of PR according to the single component adsorption, while it showed the opposite trend in the competitive adsorption. The selectivity of DR and PR could reach 2.60 at 298.15 K. In conclusion, UiO-66 can be a feasible adsorbent to separate DR and PR for industrial application.
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高影响因子
FUEL
·
2018
·
IF 4.908
Xiong-Fei Zhang,Zhongguo Wang,Yi Feng,Yuxia Zhong,Jiaqiang Liao,Yaquan Wang,Jianfeng Yao
Metal organic frameworks (MOFs) have recently emerged as promising candidates for efficient removal of sulfur-containing compounds (SCCs) from liquid fuels. In this study, adsorptive desulfurization (ADS) is performed by adsorbing thiophene (TP) and benzothiophene (BT) from model fuels over pristine and functionalized UiO-66 (Zr). The introduction of amino ( NH 2 ) and carboxylic ( COOH) groups reduces the porosity of UiO-66. However, the adsorption capacities of functionalized UiO-66 improved remarkably. Especially for the adsorbent functionalized with amino moieties (UiO-66-NH 2 ), its maximum adsorption capacities for TP (29.5 mg S/g) and BT (35.7 mg S/g) are 1.7 and 1.8 times to that of bare UiO-66. The superior performance of UiO-66-NH 2 is ascribed to the higher availability of hydrogen-bond donor sites in the surface and the favorable interactions between H atoms of NH 2 and sulfur species. UiO-66-COOH is beneficial for the adsorption of SCCs than that of pristine UiO-66 because of the existence of acid-base interactions. Moreover, the reusability of UiO-66-NH 2 is confirmed by regenerating it via a simple solvent washing.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Fan Yang,Weiyang Li,Bohejin Tang
An amorphous metal-organic framework (aMOF) UiO-66 (Zr-MOF) was prepared directly from synthesis, different from experiments involving heating, pressure, and ball-milling by other researchers. The as-prepared amorphous UiO-66 has been successfully used as a supercapacitor electrode material, exhibiting a high specific capacitance (920 F g −1 at 10 mV s −1 ) superior to crystalline UiO-66. It has been verified that the material after reaction can still remain amorphous state by transmission electron microscopy (TEM). The capacitance of amorphous UiO-66 can maintain 610 F g −1 after 5000 cycles, suggesting its promising potential as a supercapacitor electrode material.
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高影响因子
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