Journal of Water Process Engineering
·
2025
·
IF 6.7
Xixiang Liu,Xiurong Chen,Yongming Luo,Caiyun Han,SuFang He
Much research has focused on the removal of individual contaminants such as As(V) or Cr(VI) from wastewater. However, limited efforts have been devoted to their simultaneous removal in binary systems. This is largely due to the complexity of wastewater matrices and the similar chemical characteristics of As(V) and Cr(VI). In this study, La-modified UiO-66 was synthesized by a one-pot method and employed as a multifunctional adsorbent to simultaneously remove As(V) and Cr(VI) via batch experiments. Characterization results demonstrated that La was successfully grafted onto UiO-66 through Zr-ligand (O)-La and Zr-ligand (O)-Zr linkages, while the fcu structural topology and microporous nature of UiO-66 were well remained. For simultaneous uptake of As(V) and Cr(VI), a synergistic effect of Cr(VI) was observed on As(V) removal, whereas As(V) exhibited an inhibitory effect on Cr(VI) adsorption. Compared with the single component system, the adsorption capacity of As(V) in the binary system increased by approximately 26 %, while the adsorption capacity of Cr(VI) decreased by about 20 %. The enhanced uptake of As(V) was attributed to the formation of a new Cr As complex compound between adsorbed Cr(III) and As(V). In contrast, the inhibitory influence of As(V) on Cr(VI) adsorption was ascribed to the strong affinity of As(V) for the active adsorption sites. Overall, these results demonstrate that La-modified UiO-66 is a promising candidate for the simultaneous removal of As(V) and Cr(VI) in binary systems, particularly under conditions of elevated As(V) concentration.
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APPLIED ENERGY
·
2020
·
IF 8.848
Wenlong Xiang,Jie Ren,Si Chen,Chenyang Shen,Yifei Chen,Minhua Zhang,Chang-jun Liu
Metal-organic frameworks (MOFs) have been confirmed to be a promising material for carbon dioxide capture, while the simultaneous capture and conversion of carbon dioxide over the MOF-based catalysts is furthermore being a hot topic. In this work, we demonstrate that the zirconium-based MOF UiO-66 (UiO for University of Oslo) with missing-linker defects is a highly active catalyst for carbon dioxide cycloaddition with an epoxide, which is a reaction with 100% atom economy and broad industrial uses. A facile, rapid, energy-saving and environmentally friendly argon plasma treatment was employed to create the missing-linker defects in UiO-66 without using hazardous chemicals at atmospheric pressure and temperature below 398 K, whereas the bulk structure of UiO-66 remained stable. The energetic argon plasma species decomposed part of the linkers within UiO-66 structure, leaving unsaturated metal sites. The defect concentration in UiO-66 was tuned by changing the plasma bombardment time. After an argon plasma treatment for 30 min, the number of linker deficiencies per Zr 6 cluster can reach up to 2.3. The product yield of the UiO-66 with abundant missing-linker defects increased of ca. 43% over the defect-free UiO-66. The crucial role of the missing-linker defects of UiO-66 in the enhancement of the catalytic activity was confirmed. The present study will be helpful for the future preparation of defective MOFs with potential applications not only for carbon dioxide conversion but also for energy storage and conversion.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chaoting Shi,Ninghan Tang,Shan Pu,Hui Xin,Lan Wu,Xiandeng Hou
Metal-Organic Frameworks (MOFs) have been widely used for the antibiotic pollution control. However, it remains a challenge to simple design and synthesis of multifunctional MOFs for sensing and degradation antibiotics. Herein, a multifunctional UiO-66(Zr/Ce)-NH 2 ratiometric fluorescence sensing and photocatalytic degradation platform was rapidly and simply constructed at room temperature by a one-pot method using a dielectric barrier discharge device. The mixed-metal centers and mixed-ligands of this platform enabled effective ratiometric fluorescence sensing of tetracycline (TC), along with a visual fluorescence shift from blue to yellow-green color. The platform demonstrated a detection of TC ranged from 200 nM to 15 μM, with a detection limit of 43 nM. Moreover, the UiO-66(Zr/Ce)-NH 2 exhibited strong light absorption and efficient photogenerated carrier separation, thus offering excellent degradation performance of TC compared with that of MOFs with single metal center, mixed ligands or mixed metal centers. The mechanism of fluorescence detection and potential charge transfer pathways by the UiO-66(Zr/Ce)-NH 2 were analyzed. This work provided a new approach for the simple design and synthesis of multifunctional MOFs platforms.
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ANALYTICAL SCIENCES
·
2024
·Vol. 40
·期 6
·1081-1087
·
IF 1.8
Mei Xuqiao,Zeng Zhenhua,Xu Wenxin,Yang Huicong,Zheng Yuanhai,Gao Haimin,Wu Chuncai,Zheng Yanping,Xu Qiaoli,Wang Guowei,Xu Yuhuang,Wu Ayang
CA125 (carbohydrate antigen 125) is an important biomarker of ovarian cancer, so developing effective method for its detection is of great significance. In the present work, a novel sandwich-like electrochemical immunosensor (STEM) of CA125 was constructed by preparing nanoribbon-like Ti 3 C 2 T x MXenes (Ti 3 C 2 T x NR) to immobilize primary antibody (PAb) of CA125 and UIO-66-NH 2 MOFs structure to immobilize second antibody (SAb) and electroactive toluidine blue (Tb) probe. In this designed STEM assay, the as-prepared Ti 3 C 2 T x NR nanohybrid offers the advantages in large surface area and conductivity as carrier, and UIO-66-NH 2 provided an ideal platform to accommodate SAb and a large number of Tb molecules as signal amplifier. In the presence of CA125, the peak currents of Tb from the formed STEM structure increase with the increase of CA125 level. After optimizing the related control conditions, a wide linear range (0.2–150.0 U mL −1 ) and a very low detection limit (0.05 U mL −1 ) of CA125 were achieved. It’s thus expected the developed STEM strategy has important applications for the detection of CA125. Graphical abstract
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuangqin Tian,Xin Shi,Shujie Wang,Yi He,Bifang Zheng,Xianhong Deng,Ziqin Zhou,Wenbin Wu,Kai Xin,Lihong Tang
With the ever-increasing challenge of heavy metal pollution, the imperative for developing highly efficient adsorbents has become apparent to remove metal ions from wastewater completely. In this study, we introduce a novel magnetic core–shell adsorbent, Fe 3 O 4 @UiO-66-PDA. It features a polydopamine (PDA) modified zirconium-based metal–organic framework (UiO-66) synthesized through a simple solvothermal method. The adsorbent boasts a unique core–shell architecture with a high specific surface area, abundant micropores, and remarkable thermal stability. The adsorption capabilities of six metal ions (Fe 3+ , Mn 2+ , Pb 2+ , Cu 2+ , Hg 2+ , and Cd 2+ ) were systematically investigated, guided by the theory of hard and soft acids and bases. Among these, three representative metal ions (Fe 3+ , Pb 2+ , and Hg 2+ ) were scrutinized in detail. The activated Fe 3 O 4 @UiO-66-PDA exhibited exceptional adsorption capacities for these metal ions, achieving impressive values of 97.99 mg/g, 121.42 mg/g, and 130.72 mg/g, respectively, at pH 5.0. Moreover, the adsorbent demonstrated efficient recovery from aqueous solution using an external magnet, maintaining robust adsorption efficiency (>80%) and stability even after six cycles. To delve deeper into the optimized adsorption of Hg 2+ , density functional theory (DFT) analysis was employed, revealing an adsorption energy of -2.61 eV for Hg 2+ . This notable adsorption capacity was primarily attributed to electron interactions and coordination effects. This study offers valuable insights into metal ion adsorption facilitated, by magnetic metal–organic framework (MOF) materials.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Rui Cao,Xinxin Li,Zhihang He,Hanxiao Tang,Xiao-Ke Zheng,Zhijuan Zhang
The development of probes for the efficient detection of volatile organic compounds is crucial for both human health protection and environmental monitoring. In this study, we successfully synthesized a ratiometric fluorescent sensing material [Eu-UiO-67 (1:1)], featuring dual-emission fluorescence peaks via a one-pot method. This material demonstrated exceptional ratiometric fluorescence recognition properties for liquid styrene and isoprene, achieving low limit of detections (LODs) of 6.2 and 20.24 ppb, respectively. Furthermore, we leveraged its outstanding photoluminescence properties to fabricate a Eu-UiO-67 film, which exhibited distinctive fluorescence responses toward gaseous styrene and isoprene. This unique behavior resulted in LODs of 12.42 ppb for gaseous styrene and 15.39 ppb for gaseous isoprene. The investigation into the sensing mechanisms revealed that the fluorescence response for styrene was mediated by an internal filtration effect, which arose from the competitive energy absorption between styrene and the Eu-UiO-67 (1:1) material. In contrast, fluorescence resonance energy transfer occurred between isoprene and the Eu-UiO-67 (1:1) materials. This approach offers a sensitive and reliable method for the detection of liquid/gaseous styrene and isoprene.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Peng Li,Yuxiu Sun,Zhengqing Zhang,Zhenjie Gu,Zhihua Qiao,Chongli Zhong
Metal-organic frameworks (MOFs) have driven the development of polycrystalline membranes in the field of gas separation owing to the strong adsorption-desorption behavior and stable framework structure. However, the poor heterogeneous bonding ability between crystals and the substrate leads to the unsatisfactory gas separation as well as low stability of MOF membranes, especially in the humid environment . Herein, we prepared a thin and defect-free UiO-66 membrane by a crystal heterogeneous nucleation assisted growth strategy for efficient CO 2 /N 2 separation. The addition of small amount of water in the precursor solution promoted the crystal nucleation process on the substrate surface. Meanwhile, the smooth PDMS interlayer guaranteed the heterogeneous well-intergrown of crystals into thin UiO-66 membranes, and provided a hydrophobic environment. Therefore, the dense UiO-66 membrane with a small thickness exhibited a high CO 2 permeance (177.4 × 10 −9 mol·m −2 ·s −1 ·Pa −1 ) with moderate CO 2 /N 2 selectivity (24.3) under humid conditions. Furthermore, the prepared membrane demonstrated excellent renewable performance after dehumidification at high temperature, and maintained good hydrothermal stability during long-term operation under the humid environment. This work provides a new insight for the design of high-quality MOF membranes and promotes the development of MOF membranes in practical gas separation process.
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CRYSTENGCOMM
·
2025
·
IF 2.6
Huanxia Lin,Wensong Lin,Yeheng Zhang,Ran Gao,Yong He
BiOCl/UiO-66-NH2 photocatalysts were synthesized by a hydrothermal method. BUNH-8 (BiOCl/UiO-66-NH2 composite with 8% UiO-66-NH2) exhibits exceptional photocatalytic performance under visible-light illumination, degrading 92% of rhodamine B (RhB) within 60 minutes, which is 38.16% greater than that of pure BiOCl. The enhanced performance of the BiOCl/UiO-66-NH2 composite photocatalyst can be attributed to the distinct band structure difference between BiOCl and UiO-66-NH2, facilitating effective Z-scheme charge separation and transfer under light irradiation. Superoxide radicals were determined to be the crucial active species in the photocatalytic degradation process via electron paramagnetic resonance (EPR) analysis and a simulated photocatalytic degradation experiment of the dye RhB with scavengers added. Apart from its high efficiency, BUNH-8 demonstrates excellent stability as well. Even after being reused four times, it maintains its excellent photocatalytic performance, suggesting its high potential for application.
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Desalination and Water Treatment
·
2024
·
IF 1
Sheng Feng,Runbai Wang,Shanshan Feng,Zhihui Zhang,Shuguang Liu
In this study, a perfect UiO-66 was synthesized by adding benzoic acid in the precursor solution and activating it with chloroform after synthesis. The crystal morphology and material properties of the synthesized materials were investigated by X-ray powder diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, N 2 adsorption–desorption analysis, zeta potential, and thermogravimetric analyses. A typical anionic organic dye, Congo red (CR), was used as the target contaminant to examine the adsorption properties of a series of UiO-66. The acid-promoted and activated UiO-66 had a more regular octahedral structure, high-surface area of 905–1,230 m 2 /g, and more positive zeta potential (hydrogen ion), which might explained the greatly enhanced adsorption of CR dye. The effect of several influential parameters such as adsorbent dosage, solution pH, initial dye concentration, temperature, and contact time was well studied and optimized by using batch adsorption study. Moreover, mechanisms with kinetic, isotherm, and thermodynamics were researched in detail. The acid-promoted and activated UiO-66 could be regenerated by a simple N, N-dimethylformamide -washing method and exhibited stable and high reusability over five cycles. Overall, the acid-promoted and activated UiO-66 was an excellent candidate for wastewater treatment due to a simple synthesis procedure, high efficiency, reusability, and stability in the aqueous phase.
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高影响因子
JOURNAL OF PHYSICAL CHEMISTRY A
·
2020
·
IF 2.6
Lincheng Li,Yunlan Xu,Dengjie Zhong
Herein, we reported a simple solvothermal and chemical oxidation method to synthesize a magnetic core–shell composite (Fe3O4@UiO-66@PANI) for Cr(VI) removal from wastewater. Due to the porosity and stability of UiO-66 and stability, high acid resistance, and multiple active (reducing and chelating) groups of polyaniline (PANI), Fe3O4@UiO-66@PANI exhibited excellent efficiency, regeneration, and reusability performance for Cr(VI) removal. Its maximum adsorption capacity and removal rate were 474.42 mg·g–1 and 99.90%, respectively. The effects of initial pH values, contact time, and initial Cr(VI) concentration on Cr(VI) removal were investigated. The fitted data showed that the adsorption process was consistent with the pseudo-second-order kinetic model and Langmuir isothermal model. The study of the mechanism shows that the excellent efficiency of Fe3O4@UiO-66@PANI is due to the electrostatic adsorption and reduction of Cr(VI) and the chelation of Cr3+. The results demonstrate that Fe3O4@UiO-66@PANI is a promising adsorbent for the Cr(VI) removal.
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APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Mo Qiu,Tianmeng Guo,Ran Xi,Danni Li,Xinhua Qi
In this paper, the as-prepared metal-organic frameworks material UiO-66 and other Zr-MOFs were directly used as catalytic transfer hydrogenation (CTH) catalysts to catalyze furfural (FF) to furfuryl alcohol (FAL) with 2-propanol (IPA) acted as both solvent and hydrogen donor. The results showed that the as-prepared UiO-66 had satisfactory catalytic activity and selectivity in yielding FAL (97 %) from the CTH of FF at 140 °C within 5 h. Moreover, the as-prepared UiO-66 exhibited relatively stable catalytic activity over five cycles and easy regeneration. Interestingly, UiO-66 was also applicable for the CTH of the other aldehydes such as 5-hydroxymethyfurfural, 5-methylfurfural, 4-methoxybenzaldehyde, and n-hexanal to the corresponding alcohols, affording high product yields up to 98 %. This work provides a green, simple and sustainable process for the catalytic production of FAL from biomass-based furfural, which has certain significance for the sustainable utilization of biomass.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 35
·26114-26129
·
IF 4.4
Fan Yan,Sun Xueqin,Bi Tao,Hou Bo,Lu Fang
The accumulation of tetracycline antibiotics in water environments can lead to the emergence of antibiotic-resistant bacteria and resistance genes, posing a potential threat to ecosystems and human health. Therefore, the development of cost-effective and efficient methods for the remediation of antibiotic wastewater has become a current research hotspot. In this study, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (University of Oslo-66, abbreviated as UiO-66). Under irradiation of simulated sunlight, UiO-66-CA-Cu-led photocatalysis and peroxymonosulfate (PMS) activation co-degradation system achieved 93.3% ( k = 0.04712 min −1 ) removal efficiency of tetracycline hydrochloride (20 mg/L, 50 mL) within 60 min. The functional modification was used to optimize the local environment of the parent MOF. The asymmetry of the Zr–O cluster structure introduced by CA could effectively improve the separation efficiency of photogenerated carrier in the material, and the introduced Cu 2+ ions could be used as the activation site to further enhance the material’s activation ability to PMS. Graphical In this work, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (UiO-66). Under simulated sunlight irradiation, the degradation system constructed by the photocatalyst UiO-66-CA-Cu coupled with peroxymonosulfate (PMS) activation could achieve efficient removal of tetracycline hydrochloride (removal efficiency: 93.3%, k = 0.04712 min -1 ). In addition, we systematically investigated the effects of PMS concentration, photocatalyst concentration and initial pH value on the degradation performance over this system, and further proposed the possible degradation mechanism.
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