INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Huanggen Yang,Pei Zhang,Qi Zheng,Muhammad Usman Hameed,Saleem Raza
The presence of pollutants in drinking water has become a significant concern recently. Various substances, including activated carbon, membranes, biochar, etc., are used to remove these pollutants. In the present study, a new composite comprising cotton fabric and a mixture of Metal-Organic Frameworks (MOFs) was synthesized and used as an adsorbent for eliminating pollutants from wastewater. At first, the UiO-66 MOFs were prepared by a simple method of reacting Zirconium (IV) chloride (ZrCl 4 ) and p-Phthalic acid (PTA) after successful preparation of UiO-66 then modified its surface with amino functional groups by reacting with APTES to obtain UiO-66-NH 2 . Moreover, the cellulose cotton fabric (CF) surface was modified with Polydopamine (PDA) and obtained CF@PDA. Further, with the help of EDC-HCl and NHS, the UiO-66-NH 2 grafted on the surface of the CF@PDA and finally obtained CF@PDA/UiO-66-NH 2 . In addition, the adsorption study was performed toward RhB dye and Pb(II) metal ion pollutants. The maximum adsorption toward RhB dye was 68.5 mg/g, while toward Pb(II) metal ions was 65 mg/g. In addition, the kinetic study was also conducted and the result favoured the Pseudo-second order kinetic study. The adsorption isotherm was also studied and the Langmuir model was more fitted as compared with the Freundlich model. Moreover, the material has excellent regeneration and recycling ability after ten cycles. The significant adsorption ability, the novel combination of cotton and MOFs, and the recycling feature make our material CF@PDA/UiO-66-NH 2 a promising potential absorbent material for wastewater treatment and even in other important areas of water research.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Ming Fang,Zhenfei Yang,Yang Guo,Xinnian Xia,Shuaijun Pan
The internal electric field induced by piezoelectric effect can optimize the transport pathway of photogenerated charge in photocatalysis. We constructed an effcient piezoelectric photocatalytic heterojunction UiO-66-NH 2 @CdS and achieved a shift in the charge transfer mechanism through the piezoelectric effect, resulting in excellent photocatalytic H 2 evolution performance. The optimal heterojunction under the ultrasonic environment exhibited 2028.48 μmol·g −1 ·h −1 photocatalytic H 2 evolution performance, roughly four times better than no-ultrasound condition. Because of the piezoelectric polarization of UiO-66-NH 2 , the photogenerated carrier transport mechanism was changed from type Ⅱ to the more favorable Z-scheme for charge separation. Meanwhile, the built-in electric field caused by the piezoelectric effect can act as a powerful driving force for charge separation, achieving high charge separation efficiency and promoting the utilization of photogenerated electrons. This work would provide a fresh perspective for MOF-based piezoelectric photocatalysts and have implications for the design of efficient Z-scheme heterojunctions.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2021
·Vol. 328
·期 1
·397-410
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IF 1.371
Wang Yanlin,Long Jun,Xu Wenjie,Luo Huan,Liu Jun,Zhang Yaping,Li Jinchao,Luo Xuegang
The development of highly efficient adsorbent presents an enticing prospect for U(VI)-containing radioactive wastewater treatment. In this work, a novel porous cCS/PVA/UiO-66-NH 2 membrane absorbent comprising of crosslinked chitosan (cCS), polyvinyl alcohol (PVA) and UiO-66-NH 2 is designed and prepared. The adsorption capacity of porous cCS/PVA/UiO-66-NH 2 membrane achieves 316.50 mg g −1 under an optimal condition. Furthermore, the porous cCS/PVA/UiO-66-NH 2 membrane exhibits a high selectivity for U(VI) adsorption in simulated radioactive wastewater treatment. The possible mechanism of U(VI) adsorption onto porous cCS/PVA/UiO-66-NH 2 membrane mainly includes surface complexation and cation exchange processes. In addition, the porous cCS/PVA/UiO-66-NH 2 membrane also exhibits excellent cycling adsorption-desorption performance. All these results demonstrate that the porous cCS/PVA/UiO-66-NH 2 membrane is a promising candidate for application in U(VI) removal from radioactive wastewater.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Wenliang Feng,Jing Zhang,Abdulmalik Yusuf,Xiang Ao,Dongfeng Shi,Vinodkumar Etacheri,De-Yi Wang
The practical application of sodium-ion hybrid capacitors is limited by their low energy densities resulted from the kinetics mismatch between cathodes and anodes, and the fire safety related to the flammable electrolyte-separator system. Hence, we report a rational design of metal–organic frameworks (MOFs, UiO-66) modified PVDF-HFP separator. High tensile strength and dimensional thermal stability of the separator reduce the risk of electrode short circuit caused by the separator deformation. MCC test demonstrates a reduction of 75% in peak heat release rate (pHRR), indicating an enhanced fire-resistant property of the separator. This is due to the transformation of UiO-66 into ZrO 2 accompanied by the consumption of oxygen and the formation of the barrier char that suppresses further heat release. Quasi-solid-state electrolyte prepared based on this separator presents an enhanced ionic conductivity of 2.44 mS cm −1 and Na-ion transference number of 0.55, which are related to the high porosity (>70%) and electrolyte uptake (~320%) of the separator. Moreover, the open metal sites of UiO-66 can capture PF 6 – and consequently liberate the Na + for faster migration, thus reducing the kinetics mismatch between cathodes and anodes. Such multifunctional separator enables the quasi-solid-state Na-ion hybrid capacitor to achieve high energy density (182 Wh kg −1 @31 W kg −1 ) and power density (5280 W kg −1 @22 Wh kg −1 ), as well as excellent cyclic stability (10,000 cycles @1000 mA g −1 ).
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Zhuo-Rui Jiang,Yuxin Li,Deyun Zhang,Yu-Xiao Zhou,Genbao Xu,Changhua Wang,Yeqing Lan,Jing Guo
Arsenite (As(III)) is more toxic and difficult to remove than arsenate (As(V)). In this study, an S-doped Cu-La bimetallic oxide (S-CuLaO) decorated with metal-organic framework (MOF) composite (S-CuLaO@UIO-66) was synthesized and applied for the adsorption of As(III). The maximum adsorption capacity of As(III) by S-CuLaO@UIO-66 was as high as 171 mg/g, which was much higher compared with other MOF compounds reported to date. The UIO-66 support improved the dispersion and reduced the size of the S-CuLaO particles, which increased the number of exposed adsorption reactive sites. Study of the mechanism revealed that the synchronous oxidation and adsorption significantly increased the removal of As(III). O 2 ∙ - was produced by the receiving electron from the dissolved oxygen from Cu(I) in S-CuLaO, which converted As(III) to As(V). Furthermore, the stability and reusability S-CuLaO@UIO-66 (without regeneration) was investigated at a low As(III) concentration (approximately 1000 µg/L) in deionized water and well water. The residual arsenic concentration ranged from 0.8 to 2.8 μg/L in deionized water and 3–58.2 μg/L in well water within 240 min during three cycles. Generally, this study suggests that combining an optimal oxide with a stable MOF is a promising approach for the fabrication of composite adsorbents.
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DESALINATION
·
2020
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IF 7.098
Zhengyang Gu,Shuili Yu,Junyong Zhu,Ping Li,Xuerui Gao,Ruijun Zhang
The utilization of metal-organic frameworks (MOFs) has been proved to be promising in the attainment of high-performance membranes. In this work, lysine-decorated UiO-66 (Lys@UiO-66) is prepared via post-synthetic modification. Then, the controlled positioning of Lys@UiO-66 on a polyethersulfone (PES) substrate membrane is achieved by a pressure-assisted method, followed by interfacial polymerization to fabricate the Lys@UiO-66-based thin-film nanocomposite membrane (TFN-LDU). An even distribution of hydrophilic MOFs atop the substrate induces the formation of regular tent-like and mesh-topology polyamide structures, which enhance the effective membrane surface area and provide additional water transport channels. The optimal membrane with a Lys@UiO-66 loading density of 17.13 μg cm −2 , TFN-LDU8, achieves a 55% enhancement in water permeability (18.27 L m −2 h −1 bar −1 ) without compromising the solute selectivity . Importantly, the TFN-LDU8 membrane exhibits high rejections of divalent cation salts (97.81% for MgCl 2 and 92.81% for CaCl 2 ) and improved mono-/divalent cation selectivity due to the pore hindrance and electrostatic exclusion of the Lys@UiO-66. Furthermore, the TFN-LDU8 membrane evinces a stable nanofiltration performance during the long-term nanofiltration experiment and displays a good antifouling ability in the fouling tests. This research provides a promising strategy for the design of nanofiltration membranes with special functions by using modified MOFs.
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ENERGY & FUELS
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2020
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IF 3.421
Chenglong Wen,Jundong Xu,Xueman Wang,Yu Fan
A novel SO42–/ZrO2@SAPO-11 (SZ@SA-11) composite was synthesized via a two-step method, and the corresponding SZ@SA-11 supported Pt catalyst was applied to catalyze n-heptane hydroisomerization. First, UiO-66@SAPO-11 is produced by the growth of UiO-66 on SAPO-11 due to the covalent bonds between Zr and the oxygen in the hydroxyl groups of SAPO-11. Then, UiO-66@SAPO-11 is decomposed to form ZrO2@SAPO-11 via calcination in air, and the SZ@SA-11 composite is obtained by the impregnation of ZrO2@SAPO-11 with (NH4)2SO4 and subsequent calcination. Compared with the physical mixture of SO42–/ZrO2 and conventional SAPO-11 (SZ+SA-11), SZ@SA-11 possesses smaller ZrO2 particles and more tetragonal ZrO2. Moderate and strong Brønsted acid sites (MSBAS) are produced only via interactions between tetragonal ZrO2 and sulfate, so SZ@SA-11 with more tetragonal ZrO2 has a greater amount of MSBAS than SZ+SA-11. These advantages of SZ@SA-11 endow the corresponding Pt/SZ@SA-11 catalyst with a better performance for n-heptane hydroisomerization compared to Pt/(SZ+SA-11). In addition, compared with the other counterparts such as Pt/SZ and Pt/SA-11, Pt/SZ@SA-11 presents higher selectivity for total isomers (91.5%), higher selectivity for multibranched isomers (22.6%), and a lower cracking selectivity (8.1%) in n-heptane hydroisomerization. The strategy proposed herein provides a new insight into the acidity adjustment of the molecular-sieve-based catalysts for hydrocarbon hydroisomerization.
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BIOSENSORS & BIOELECTRONICS
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2020
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IF 10.257
Juncong Miao,Kang Du,Xuan Li,Xiaoting Xu,Xue Dong,Jinglong Fang,Wei Cao,Qin Wei
Procalcitonin (PCT) as a disease marker is of great significance in the early diagnosis of septicemia and pyemia. Biosensor have good prospects for analysis and detection of disease markers, but developing highly sensitive detection methods for detecting PCT remains a daunting task. In this paper, we develop a ratiometric electrochemical immunosensor with Au NPs modified SiO 2 -Fc-COOH complex as matrix and UiO-66 loaded with Toluidine blue (TB) as a marker for quantitative detection of procalcitonin (PCT). The SiO 2 modified by APTES not only has a large specific surface area but also contains abundant amino groups, which can be connected to the electrochemical probe of ferrocenecarboxylic acid (Fc-COOH). UiO-66 has the advantages of large specific surface area, high porosity and adjustable structure, which can adsorb toluidine blue electrochemical probe through electrostatic attraction . Measurement and analysis of the prepared immunosensor by Differential Pulse Voltammetry (DPV) show that the oxidation peak currents of Fc-COOH and TB appear at potentials of 0.30 V and −0.30 V respectively. As the PCT concentration increases, the oxidation peak current of TB increases and the oxidation peak current of Fc-COOH decreases. The ratios ( ΔI = ΔI TB /ΔI Fc-COOH ) between the double signals could show a certain linear relationship with the concentration of the PCT within a certain range. Under optimal conditions, the linear range of detection obtained by the immunosensor was 1 pg/mL-100 ng/mL and the detection limit was 0.3 pg/mL. In this work, the developed ratiometric electrochemical immunosensor not only provides a simple, reliable and sensitive strategy for quantitative detection of PCT but also provides a useful method for clinical detection of other disease markers.
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TALANTA
·
2021
·
IF 6.057
Jing Ru,Xuemei Wang,Xinglan Cui,Fangbing Wang,Hong Ji,Xinzhen Du,Xiaoquan Lu
Heavy metal pollution in the environment poses a serious threat to the ecosystem and human health, which has attracted widespread attention. In this study, an octahedral structure composite composed of UiO-66-NH 2 MOFs and semiconductor GaOOH materials has been prepared and used as electrode materials successfully. These composites can be used for the real-time and online determination of Cd 2+ , Cu 2+ , Hg 2+ , and Pb 2+ in real water samples simultaneously or alone via an electrochemical method. Zr-MOF has a large and unique surface area that is beneficial to the adsorption and preconcentration of heavy metal ions . The experiment parameters such as pH, deposition potential, and deposition time were optimized. Under the optimized conditions, the electrochemical performances and practical applications of Zr-MOF composites modified electrode have been investigated, which shows excellent wider linear range and lower detection limit (LOD). The results demonstrated excellent selectivity, reproducibility, stability and applicability for the detection of four metal ions. These superior features stem from the synergistic reaction mechanism of UiO-66-NH 2 and GaOOH. In addition, it has been established a new detection strategy for heavy metal ions through the form of metal-organic framework (MOF) composite in this work. It may provide a novel platform for the quantitative determination of heavy metal ions in various environmental samples.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhong Li,Wenzhe Sun,Chong Chen,Qirui Guo,Xue Li,Mengwei Gu,Nengjie Feng,Jing Ding,Hui Wan,Guofeng Guan
Targeting CO 2 capture at low pressure due to the partial pressure of CO 2 in flue gases (0.01 MPa–0.02 MPa), a facile method was constructed to build functional UiO-66 structure via mixing ligands of terephthalic acid and 1,2,4-benzenetricarboxylic acid. The free -COOH from 1,2,4-benzenetricarboxylic acid could graft quantitative and dispersive deep eutectic solvents onto UiO-66 with reserved open metal sites for CO 2 adsorption. Compared to 1,3,5-benzenetricarboxylic acid, mixing ligands by 1,2,4-benzenetricarboxylic acid preserved the stability of UiO-66 structure, which was more suitable for CO 2 capture from flue gases. The active -NH 2 and -OH groups from incorporated DES synergized with the intrinsic open metal sites to enhance the CO 2 uptake at low pressure and improve adsorption selectivity of CO 2 /N 2 . At 298 K, the CO 2 uptake of DES@UiO-66-COOH(0.05) was increased by 26% at 1 bar and 50% at 0.15 bar compared to UiO-66. In addition, the selectivity of CO 2 /N 2 for DES@UiO-66-COOH(0.05) was 24.7 times as high as UiO-66 at low pressure. The strong interaction between guest CO 2 and modified UiO-66 was confirmed by higher isosteric heats of adsorption (Q st ) for DES-appended UiO-66. Even so, the sample could be regenerated at 373 K and vacuum, and could be recycled without drop of CO 2 uptake after 6 times.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Pengfei Qi,Rong Luo,Thomas Pichler,Jianqiang Zeng,Yan Wang,Yuhua Fan,Kunyan Sui
Removal of trivalent species of As and Sb from wastewater is crucial due to their more toxic and mobile properties. In this study, a novel magnetic core-shell microsphere Fe 3 O 4 @TA@UiO-66 was developed via in-situ crystal growth of UiO-66 around the magnetic Fe 3 O 4 modified by Tannic Acid (TA). Characterization of the microsphere by transmission electron microscopy (TEM) and X-ray diffraction spectroscopy (XRD) confirmed that UiO-66 was adhered on the surface of Fe 3 O 4 functionalized by TA. Adsorption experiments showed that the magnetic Fe 3 O 4 @TA@UiO-66 had high adsorption capacity for As(III) and Sb(III) and could be rapidly separated from aqueous media within two minutes after treatment. The adsorption kinetics and adsorption isotherms were described well by the pesudo-second order model and Langmuir model, respectively. In addition, the composite exhibited excellent removal performance for As(III) and Sb(III) in a broad solution chemistry environment, including pH and co-existing anions. Based on X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) measurement, we proposed that the removal mechanism was mainly controlled through a synergistic interaction of surface complexation and hydrogen bonding. This study indicates the potential of the magnetic microsphere to be used as an effective material for the removal of As(III) and Sb(III) from water.
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ACS Applied Nano Materials
·
2019
·
IF 0
Yi Feng,Qian Chen,Mengjue Cao,Nan Ling,Jianfeng Yao
Defect engineering and surface chemistry are closely related to the performance of materials. In this work, the effects of Zr precursors and Ti substitution on the photocatalytic performance of UiO-66-NH2 are studied and analyzed from the perspective of defect engineering and surface chemistry. The findings show that when using ZrOCl2·8H2O as the Zr precursor combined with the postsynthetic treatment of Ti substitution, sample U-OCl-Ti shows significant improvement in Cr(VI) adsorption (20.9 mg/g) and photocatalytic reduction of Cr(VI) under visible light. The improvement can be attributed to the highly defective framework and more -NH2 groups exposed on the surface; therefore the highest light absorption and lowest recombination rate of photogenerated electron–hole pairs are observed in U-OCl-Ti. The findings in this study contribute to a better understanding of how defects and surface chemistry affect the photocatalytic performance, thus providing some designing knowledge for the synthesis of UiO-66 or UiO-66-NH2 with high photocatalytic performance.
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