NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 18
·9857-9865
·
IF 3.269
Saisai Cheng,Ningzhao Shang,Xin Zhou,Cheng Feng,Shutao Gao,Chun Wang,Zhi Wang
Bimetallic AgPd nanoparticles anchored on metal–organic framework (UiO-66) derived N-doped porous carbon (NPC-UiO-66) was fabricated and used as a catalyst for the catalytic transfer hydrogenation of nitroarenes using formic acid-formate as the hydrogen source. The results demonstrated that the Ag1Pd9@NPC-UiO-66 composite exhibited extraordinary catalytic activity toward the hydrogenation of nitroarenes to anilines at room temperature. A series of substituted nitroarenes were successfully converted to the corresponding anilines in high yields under ambient conditions with other reducible groups remaining intact. The superior catalytic performance of the prepared catalyst can be attributed to the synergistic effect between the highly dispersed AgPd nanoparticles and the unique structure of the NPC-UiO-66 support, as well as the high adsorption ability of the catalyst for the nitroarenes.
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RSC Advances
·
2016
·Vol. 6
·期 69
·64895-64901
·
IF 3.289
Fengli Qu,Lian Xia,Chuanxiang Wu,Lijie Liu,Guoliang Li,Jinmao You
A zirconium-based metal–organic frameworks (MOF), with 2-aminoterephthalic acid as linkers, named UiO-66-NH2, has been synthetized and characterized in a dispersive solid-phase extraction (DSPE) procedure in combination with high-performance liquid chromatography (HPLC) with fluorescence detection (FLD) for the pre-concentration and detection of sialic acids (SAs) in serum samples. In this study, UiO-66-NH2 was employed for the first time as a novel DSPE sorbent for sample pretreatment. Parameters which influence the extraction efficiency such as the amount of MOF, nature of the desorption solvent and its amount, adsorption time and desorption time were investigated and optimized. Under the optimized conditions, better extraction results were obtained by UiO-66-NH2 based DSPE for the extraction of SAs from serum samples than traditional sample preparation methods. Detection limits of the method as low as 0.16 pmol for N-glycolylneuraminic acid (Neu5Gc) and 0.11 pmol for N-acetylneuraminic acid (Neu5Ac) were obtained, with determination coefficients (R2) higher than 0.9995 for the range 10–1000 pmol L−1, average recoveries of >91.3% at three different spiked levels (1, 5 and 10 ng mL−1), and relative standard deviation (RSD) values below 3.4%. The proposed method was demonstrated to be sensitive enough for determination of SAs from bio-samples.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Pei Xiu,Bai Jinchuan,Li Yaming,Kong Xiangbo
In this paper, a luminescent metal-organic framework Tb 3+ @tartaric acid-functionalized Zr-MOF (Tb 3+ @UiO-67-bpy-TA, TA = tartaric acid) was prepared by post-synthetic modification (PSM) and used as a fluorescence sensor for the detection of the pesticide nitenpyram (NTP). The fluorescence sensing experiment verified that Tb 3+ @UiO-67-bpy-TA had exceptional sensitivity and selectivity for NTP detection, and the detection limit was calculated to be as low as 1.28 µM. The mechanism studies indicated that competitive UV absorption, photoinduced electron transfer (PET) and dynamic quenching contributed to the fluorescence quenching process. In addition, the detection of NTP in tap water and Yellow River water samples by the Tb 3+ @UiO-67-bpy-TA were also investigated using standard addition method, and satisfactory recoveries were achieved.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yanwei Sun,Chunshan Song,Xinwen Guo,Yi Liu
Preferred orientation has proven to exert a significant impact on the gas separation performance of metal–organic framework membranes. Nevertheless, realizing three-dimensional orientation control remains a challenging issue. In this study, well-intergrown NH2-UiO-66 membranes with both (111) out-of-plane and regional in-plane orientations were prepared by combining oriented deposition of seeds and solvothermal epitaxial growth. Dynamic air–liquid interface-assisted self-assembly method was employed to organize uniform octahedral-shaped NH2-UiO-66 seeds into closely packed monolayers with (111) out-of-plane and regional in-plane orientations, whereas the use of ZrS2 as the zirconium precursor during the solvothermal epitaxial growth was found indispensible for sealing the intercrystalline gaps while preserving the preferred orientation inherited from seed layers. In addition, compared with solvothermal heating, employing microwave heating led to poor intergrowth between neighboring NH2-UiO-66 crystals because of a lower dielectric loss factor of the reaction medium. Gas permeation results indicated that the prepared NH2-UiO-66 membranes exhibited H2/CO2 selectivity up to 5.5 times higher than their counterparts with random and/or mere out-of-plane orientations as well as H2 permeability 14.5 times higher than NH2-MIL-125(Ti) membranes with mere out-of-plane orientation under similar operating conditions.
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Tingting Zhang,Xing Liu,Yanqiu Jiang,Xiaowei Zheng,Jian Zhang,Yudong Li,Defeng Li,Kaifeng Lin
Photo-Fenton reaction has received increasing attention in removing antibiotics in water. Herein, Fe 2 O 3 -on-ZrO 2 polypods were designed and synthesized via metal organic frameworks (MOFs) derivation strategy combined with reflux heating and baking. The experimental results showed that under Ultraviolet–visible (UV–vis) light irradiation, more than 95 % tetracycline hydrochloride (TC-HCl) was degraded by Fe 2 O 3 -on-ZrO 2 with Fe/Zr mole ratio of 1.3 in 25 min within full pH range. Mainly due to the following points, there were abundant Fe 2 O 3 -on-ZrO 2 heterojunctions, which conduced to transfer photo-induced electrons (e − ) from ZrO 2 to Fe 2 O 3 , thus accelerating the iron cycle. Besides, OH – adsorbed was oxidized to hydroxyl radicals (·OH) by holes (h + ) in the valence band (VB) of ZrO 2 , and ZrO 2 also enhanced the stability of the catalyst and reduced the leaching of iron ions. Finally, the reasonable degradation pathway and degradation mechanism were speculated by high performance liquid chromatography-mass spectrometry (HPLC-MS), electron spin resonance technology (ESR), scanning Kelvin probe (SKP), the conduction band (CB) and VB positions of Fe 2 O 3 -on-ZrO 2 , etc. This work exhibited a new structure and degradation mechanism, which would further encourage researchers to study the rational regulation of materials with special morphology and structure.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2020
·Vol. 30
·期 11
·4350-4360
·
IF 1.941
Zhang Zhihua,Peng Xinke,Zhang Zhongping,Xiao Weiming,Deng Shengjun,Mao Xuejin,Hong Sanguo,Chen Chao,Zhang Ning
Metal–organic framework (MOF) supported nanocatalysts are attracting great attentions in heterogeneous catalysis. However, they are still less explored and poorly understood in catalyzing solid–gas reactions. In current work, two MOF supported Pt nanocatalysts were prepared by immersion method coupled with the most commonly used NaBH 4 (Pt/UiO-66-NaBH 4 ) and H 2 (Pt/UiO-66-H 2 ) reduction, and their catalytic CO oxidation performances were investigated. NaBH 4 and H 2 reduction both provide highly dispersed Pt/UiO-66 nanocatalysts, and the two prepared catalysts display excellent CO oxidation activities. Moreover, CO oxidation durability tests reveal that Pt/UiO-66-NaBH 4 shows superior durability and structure stability, which are much better than those of Pt/UiO-66-H 2 . The high structure stability of Pt/UiO-66-NaBH 4 also endows it with good H 2 O and CO 2 tolerance. This work attempts to elucidate the influence of reduction methods on the structures and catalytic CO oxidation performances of Pt/UiO-66 catalysts by employing XRD, TEM, N 2 -sorption, XPS and in situ DRIFTS techniques. Furthermore, the mechanism of CO oxidation was studied by in situ DRIFTS, and the result reveals that the CO oxidation on the two catalysts follows different mechanism.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 1
·1-9
·
IF 6.232
Chen Jianxiong,Zhang Birong,Dang Xueping,Zheng Dongyun,Ai Youhong,Chen Huaixia
A polyaniline composite doped with etched multi-walled carbon nanotubes and UiO-66-NH 2 was prepared by electropolymerization. It was used as a sorbent to extract the polycyclic aromatic hydrocarbons (PAHs) phenanthrene, fluoranthene and pyrene. Its surface morphology, crystal structure and capability of adsorbing PAHs were characterized by scanning electron microscopy, X-ray photoelectron spectrometry, Fourier transform infrared spectrometry and zeta potentiometry. The π stacking and anion-π interactions are shown to play dominant roles in the sorption mechanism. Coupled with high performance liquid chromatography, the composite-modified fiber was applied to detect PAHs in lake water samples by direct immersion extraction. The method excels by (a) wide linear range (0.05–20 ng mL −1 ), (b) low limits of detection (10 pg mL −1 ), (c) satisfactory recovery from spiked samples (84.7–113.8%), and (d) good reproducibility (relative standard deviations of <6.5%). The method is superior in terms of costs and reproducibility compared to some pretreatment methods with mass spectrometric detection.
Schematic representation for interaction between PANI-etched MWCNT/UiO-66-NH 2 and polycyclic aromatic hydrocarbons (phenanthrene, fluoranthene, pyrene).
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaoqin Hai,Jiawei Liu,Qin Li,Yongpeng Ma,Ruiyu Fu,Hongbo Li,Yanhui Zhang,Xiaoli Guo,Xin Di
In this work, UiO-66-HCl-based dispersive solid-phase extraction (DSPE) was designed and developed for the enrichment of pyrethroid pesticide residues in water and food matrices before high performance liquid chromatography analysis. For the first time, gamma-valerolactone (GVL), a biodegradable, food-grade green solvent, was used as the eluent in DSPE process, realizing a significant progress in economic and ecological benefit. The stable and highly porous UiO-66-HCl was synthesized as the adsorbent by hydrothermal synthesis and hydrochloric acid etching. The prepared material was characterized by FT-IR, SEM, XRD, TGA and N 2 adsorption–desorption analyses, and the important parameters affecting the extraction efficiency were optimized. Under the optimized conditions, the method has shown satisfactory limit of detection (4 ∼ 5 μg/L) and desirable recoveries (78.3 %∼105.7 %) as well as excellent precision (RSD < 15.7 %). Moreover, the benefits of the proposed method were assessed via various green chemistry tools, and the extraction mechanism was also briefly investigated to understand the appealing adsroption performance. It was demonstrated that the method can be successfully applied for extraction and analysis of pyrethroid pesticide residues in water and food matrices, showing an excellent application potential for green analysis of trace components.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yao Zhang,Guizhen Li,Xu Wang,Mingrong Lu,Jiaxiong Li,Xiuying Fang,Wenrong Yang,Min Yang,Hongbin Wang
The development of effective methods for identifying and eliminating antibiotics from wastewater is urgently needed, and it continues to pose significant challenges. In this study, a zirconium-based metal–organic framework (UiO-66) was synthesized using a straightforward one-pot method for the dual purpose of detecting and adsorbing tetracycline (TC). Characterization by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analysis demonstrated that UiO-66 exhibited abundant surface functional groups and an exceptionally high specific surface area, resulting in a high TC removal efficiency of 85.14 % (initial concentration: 20 mg/L) over a wide pH range. The adsorption data were accurately described by the pseudo-second-order kinetic and Freundlich isotherm models. Notably, the UiO-66 material adsorbed with TC could be well regenerated at least two cycles, showing no significant loss in adsorption efficiency. Furthermore, the adsorbent demonstrated blue emission when excited at 310 nm. As the concentration of TC increased, a corresponding decrease in the fluorescence intensity of UiO-66 was observed. This change exhibited a linear correlation within the concentration range of 0.01 to 30 mg/L, achieving a detection limit as low as 0.003 mg/L. The UiO-66 probe exhibited exceptional specificity for TC and strong anti-interference capability, achieving satisfactory recoveries in the analysis of TC from real samples. These findings are poised to assist researchers in creating comprehensive strategies for the concurrent detection and elimination of antibiotics in the environment.
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高影响因子
ANALYST
·
2021
·Vol. 146
·期 9
·3052-3061
·
IF 4.616
Jie Min,Xiang-Long Qu,Bing Yan
By means of post-synthetic treatment on the UiO-66 derivative with –SO3H, a novel luminescent hybrid material named Tb3+@UiO-66–SO3H has been prepared simply and efficiently. Given its wonderful luminescence properties like intense green emission, a long lifetime, a robust structure and photostability, it is further developed as a fluorescent probe for the sensing of trans,trans-muconic acid (tt-MA, a biomarker of benzene) and Fe3+, which are closely related to human health. Notably, Tb3+@UiO-66–SO3H shows an outstanding recognition ability for Fe3+ among common cations with a low detection limit (0.11 μM, 0.006 ppm). More importantly, Tb3+@UiO-66–SO3H can realize highly sensitive and selective detection of tt-MA (detection limit, 0.58 μM, 0.083 ppm). Besides, this rapid response probe is facilely prepared, non-toxic and reusable, showing the potential of Tb3+@UiO-66–SO3H in the practical monitoring of tt-MA and Fe3+.
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Chen Tian,Jian Zhao,Xinwen Ou,Jieting Wan,Yuepeng Cai,Zhang Lin,Zhi Dang,Baoshan Xing
p-Arsanilic acid (p-ASA) is an emerging organoarsenic pollutant comprising both inorganic and organic moieties. For the efficient removal of p-ASA, adsorbents with high adsorption affinity are urgently needed. Herein, amine-modified UiO-67 (UiO-67-NH2) metal–organic frameworks (MOFs) were synthesized, and their adsorption affinities toward p-ASA were 2 times higher than that of the pristine UiO-67. Extended X-ray absorption fine structure (EXAFS), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculation results revealed adsorption through a combination of As–O–Zr coordination, hydrogen bonding, and π–π stacking, among which As–O–Zr coordination was the dominant force. Amine groups played a significant role in enhancing the adsorption affinity through strengthening the As–O–Zr coordination and π–π stacking, as well as forming new adsorption sites via hydrogen bonding. UiO-67-NH2s could remove p-ASA at low concentrations (<5 mg L–1) in simulated natural and wastewaters to an arsenic level lower than that of the drinking water standard of World Health Organization (WHO) and the surface water standard of China, respectively. This work provided an emerging and promising method to increase the adsorption affinity of MOFs toward pollutants containing both organic and inorganic moieties, via modifying functional groups based on the pollutant structure to achieve synergistic adsorption effect.
研究领域:
环境科学
·
材料化学
·
吸附技术
·
水污染控制
·
理论化学
·
X射线光谱学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Feihu Mu,Qiong Cai,Hao Hu,Jian Wang,Yun Wang,Shijian Zhou,Yan Kong
To solve the problem of energy shortage and environmental pollution, the construction of properly designed photocatalysts is a promising method. Here, UiO-66-(COOH) 2 /ZnIn 2 S 4 Z-scheme photocatalyst decorated with MoS 2 nanosheets was designed and constructed as a novel 3D hierarchical structure via hydrothermal methods. In this particular 3D hierarchical structure, the UiO-66-(COOH) 2 nanoparticles are decorated in the interweaving petal nanosheets of ZnIn 2 S 4 microspheres, while the co-catalyst of MoS 2 is folded at the edge of these interweaving petals. The excellent heterojunctions with highly exposed catalytic active sites are correspondingly built, and the close interfacial interaction between UiO-66-(COOH) 2 , MoS 2 and ZnIn 2 S 4 create a stage for fast transfer of photogenerated electrons, which are both effective for the photocatalytic reaction process. Also, the Z-scheme charge-transfer process improves the oxidizability and reducibility between UiO-66-(COOH) 2 and ZnIn 2 S 4 . As a result, the optimized UiO-66-(COOH) 2 /MoS 2 /ZnIn 2 S 4 photocatalyst exhibits excellent photocatalytic hydrogen production (18.794 mmol h −1 g −1 ) and reduction of Cr(VI) (0.06850 min −1 ) under simulated solar light irradiation, which are 15.3 and 6.7 times higher than that of bare ZnIn 2 S 4 , respectively, and also the prominent stability and excellent recyclability are obtained. This study provides new insights into the research on the Z-scheme system containing MOF components for growing energy and environmental demands.
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