JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Qingqing Wang,Wei Zhou,Claudia Li,Sibudjing Kawi,Yinhui Li
The application of photocatalysts in environmental field has emerged as a prominent research topic. Nevertheless, the efficiency of photocatalysts is reduced as the recombination of photogenerated chargers significantly, restricting their extensive use in this domain. In the present study, photocatalysts composed of bismuth molybdate/NH 2 -UiO-66(Zr) (Bi 2 MoO 6 /NH 2 -UiO-66(Zr)) featuring Z-scheme heterojunctions were effectively synthesized using a two-step hydrothermal technique. These photocatalysts exhibit remarkable photocatalytic degradation under visible light conditions. Notably, the broad planar configuration of Bi 2 MoO 6 sheets improves the separation of the photogenerated charge carriers. NH 2 -UiO-66(Zr) layered atop Bi 2 MoO 6 sheets enhances the availability of catalytically active sites, reduces charge recombination, and promotes charge transfer through the interface. The kinetic rate constant for Bi 2 MoO 6 /NH 2 -UiO-66(Zr) is around 0.00329 L mg −1 min −1 , indicating the increase of 3.78 and 41.13 times compared with pure Bi 2 MoO 6 and NH 2 -UiO-66(Zr), respectively. The efficiency for photocatalytic degradation of tetracycline using Bi 2 MoO 6 /NH 2 -UiO-66(Zr) reaches 81.72 % under visible light. Importantly, this efficiency exhibits a reduction of 10 % after five recycling cycles, demonstrating notable stability. The photocatalytic mechanism involved in tetracycline degradation was uncovered through trapping experiments and EPR, indicating that it is predominantly facilitated by the active oxidation of ·O 2 - and ·OH. The intermediates of the photocatalytic process as well as the possible degradation pathways were discussed. The creation of Bi 2 MoO 6 sheets/NH 2 -UiO-66(Zr) heterojunction photocatalysts provides a fresh approach to the development of novel catalysts, which may lead to significant advancements in environmental remediation efforts.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiahua Cheng,Linya Fei,Xiaoqing Zhou,Beibei Lu,Zhihui Zhang,Le Chen,Guojian Ji
UiO-66 and its functionalized derivatives (UiO-66-X, X = -OH, -NO 2 , -NH 2 ) were successfully synthesized via a solvothermal method, and their structural integrity and functionalization were confirmed. Hydrogen adsorption experiments and Grand Canonical Monte Carlo (GCMC) simulations demonstrated that UiO-66-OH exhibited the highest hydrogen adsorption capacity. At 300 K and 1 bar, its experimental adsorption capacity reached 0.0301 wt%, representing increases of 29.18 %, 3.44 %, and 19.92 % compared to UiO-66, UiO-66-NH 2 , and UiO-66-NO 2 , respectively. At 77 K and 20 bar, its simulated adsorption capacity reached 2.352 wt%, surpassing UiO-66-NH 2 (2.229 wt%) and UiO-66-NO 2 (1.927 wt%). This superior performance is attributed to optimized pore structure and enhanced functional group interactions, providing new insights for optimizing hydrogen storage in UiO-66 materials.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 10
·833-840
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IF 2.529
Ruiping Wei,Jingdeng Fan,Xumin Qu,Lijing Gao,Yuanfeng Wu,Zongqi Zhang,Feng Hu,Guomin Xiao
Graphical Esterification of levulinic acid with ethanol was catalyzed by the cooperative effects between the Lewis acid sites offered by unsaturated Zr 6 nodes and Brønsted acid sites supplied by OH in defective UiO-66 MOFs with high defect density, which was tuned by precursor ratios and modulators. Due to their high stabilities and tunable defects, zirconium terephthalate UiO-66 type metal organic frameworks (MOFs) have been promising catalysts in many catalytic reactions. The catalytic activity of UiO-66 MOFs is significantly affected by the density of defects and hydroxyl groups bonded to Zr 6 nodes, which can be tuned by modulators. In this work, a series of defective UiO-66 were synthesized via tuning the ratio of H 2 BDC/Zr and adding monocarboxylic acids with different chain length as modulators. The synthesized UiO-66 MOFs were characterized by powder X-ray diffraction, N 2 physisorption, IR and 1 H NMR spectroscopy, scanning and transmission electron microscopy. Esterification of levulinic acid with ethanol was selected to reveal the influence of modulators, defects and hydroxyl groups. The results showed that UiO-66 with 0.5 of H 2 BDC/Zr ratio and lauric acid as the modulator owned excellent catalytic activity. The cooperative effects, between the Lewis acid sites offered by unsaturated Zr 6 nodes and Brønsted acid sites supplied by OH, has been revealed to have a significant influence on the catalytic activity.
研究领域:
材料化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
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2024
·Vol. 14
·期 10
·512
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IF 4.9
Jiawen Fan,Junjie Qi,Jingkun Li,Fuwei Pi
Arginine has been widely applied in the food industry as coloring agents, flavoring agents, and nutritional fortifiers. It is also one of the major components of feed additives. Currently, methods for the highly selective detection of arginine remain absent. For accurate and sensitive detection of L−arginine, a novel ratiometric fluorescence assay based on Ru@UiO-66-NH2was developed and demonstrated in this study. Under optimized detection conditions, the limit of detection (LOD) of this assay for L-arginine was 2.32 μM, which is superior to most assays reported to date. Meanwhile, Ru@UiO-66-NH2showed good stability within 30 days, demonstrating the wide applicability of the proposed assay. The spike-and-recovery rates of the proposed assay for L-arginine in real samples (e.g., tea, grape juice, and serum) were 84.27–113.09%. Overall, the proposed assay showed high sensitivity, good reproducibility, and excellent stability in the detection of L-arginine in both buffer and real samples.
研究领域:
分析化学
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食品科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
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IF 5.1
Zuyao Fu,Lingfeng Yang,Zhaoyang Ding,Jing Xie
Immobilized enzymes play a crucial role in analytical sensing due to their exceptional stability and considerable commercial importance. In this study, a stable Zr-based metal–organic framework (UiO-66-NH2) was prepared as an immobilization platform for horseradish peroxidase (HRP) through covalent binding. HRP@UiO-66-NH2 retained 75% of its activity after 10 cycles. Subsequently, a colorimetric/fluorometric dual-mode sensing strategy using HRP@UiO-66-NH2 was developed for nitrite detection. HRP@UiO-66-NH2 facilitated the transformation of the non-colored compound 3,3′,5,5′-tetramethylbenzidine (TMB) into its blue oxidized form. When nitrite is added, oxidized TMB (ox-TMB) specifically engaged with nitrite (NO2−) to generate diazotized TMB, leading to a color shift from blue to yellow. Concurrently, NO2− reacted with the amino groups of HRP@UiO-66-NH2, forming diazonium compounds and suppressing the fluorescence of HRP@UiO-66-NH2. The limits of detection were 0.21 μM and 0.19 μM for the colorimetric and fluorometric strategies, respectively. Furthermore, a portable kit for detecting nitrite was created by integrating gelatin with HRP@UiO-66-NH2. The kit could visually identify nitrite from 10–400 μM in colorimetric mode and 0–400 μM in fluorometric mode. This method provides an innovative approach for nitrite sensing, paving the way for new research into multifunctional immobilized enzymes and their potential uses in biochemical sensing applications.
研究领域:
生物化学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 34
·14389-14400
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IF 3.288
Wenyi Yu,Qianwei Liang,Yuwei Yin,Junjie Geng,Wei Chen,Xuanyi Tan,Hanjin Luo
Arsenite (As(III)) is more toxic and more difficult to remove from water than arsenate (As(V)). A new nano core–shell-structured K-OMS-2@UiO-66 (K-OMS-2, formula KMn8O16·nH2O) was fabricated via a facile one-step oxidation–coprecipitation method for enhanced As(III) removal. Results showed that the maximal adsorption capacity of As(III) achieved was 180.10 mg g−1. The as-synthesized K-OMS-2@UiO-66 adsorbent functions excellently across a broad pH range of 1.5 to 10.0, and the residual concentrations of As(III) can drop under 10.0 μg L−1. Based on XPS and FTIR measurements, it is proposed that the removal mechanism was mainly controlled through a synergistic interaction of surface complexation and hydrogen bonding. As(III) was sorbed onto the surface of the sorbent by Zr–O bonds and Mn–O bonds. Mn(IV) and Mn(III) in K-OMS-2@UiO-66 effectively oxidized As(III) to As(V). Then, some negatively charged As(V) were adsorbed at the positive sites of the adsorbent through electrostatic attraction, while others formed bidentate complexes with the Zr–O bonds. This study develops an attractive sorbent for As(III) removal from contaminated water and has a facile and low-cost synthesis process, good As(III) sorption performance, and reusability.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Green Energy & Environment
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2020
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IF 6.395
Zhuizhui Su,Bingxing Zhang,Xiuyan Cheng,Fanyu Zhang,Qiang Wan,Lifei Liu,Xiuniang Tan,Dongxing Tan,Lirong Zheng,Jianling Zhang
UiO-66-NH 2 , an important metal–organic framework, is usually synthesized by solvothermal method and the particle size is generally larger than 200 nm, which limits its catalytic applications in chemical reactions. It is very meaningful to produce UiO-66-NH 2 nanoparticles with ultra-small size, but remains challenging. Herein, we synthesized UiO-66-NH 2 nanoparticles in size of 8–15 nm that are immobilized on g-C 3 N 4 nanosheets. Compared with the UiO-66-NH 2 synthesized by the traditional solvothermal method (> 200 nm), the ultra-small UiO-66-NH 2 nanoparticles immobilized on g-C 3 N 4 have more unsaturated coordination positions and increased Lewis acidity. Owing to these combined advantages, the ultra-small UiO-66-NH 2 nanoparticles exhibit greatly improved catalytic activity for Meerwein–Ponndorf–Verley reaction than larger UiO-66-NH 2 particles.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Liu Yang,Yu-Long Liu,Xian-Xian Ji,Cheng-Guo Liu,Ying Fu,Fei Ye
Background A novel luminescent sensor with dual-emitting platforms, Tb@UiO-66 , was used for highly detecting Sm 3+ and teflubenzuron. Methods Tb@UiO-66 was synthesized on basis of the exchange of guest molecules, where Tb 3+ ions were encapsulated into the cages of UiO-66 . Significant finds The results of multiband fluorescence originated from the linker-to-cluster charge transfer and the characteristic emission of Tb III . Tb@UiO-66 displayed luminescence enhancements or quenches according to small molecules. Especially for Sm 3+ and teflubenzuron, the characteristic peaks of Tb@UiO-66 at 490, 545, 585, and 621 nm increased with the increasing of the concentration of the analytes, where Tb@UiO-66 exhibited the effect of luminescence enhancement. The detection limits for detecting Sm 3+ and teflubenzuron were 0.09 μM and 0.21 μM, and the changes of luminescence intensities could be observed by naked eyes under the UV light at 365 nm. Tb@UiO-66 could also be used to detect teflubenzuron in real water samples. Tb@UiO-66 could be reused for at least 5 cycles for the detection of Sm 3+ and teflubenzuron with the framework of Tb@UiO-66 uncollapsed. These results implied that the integration of Ln III luminescent materials and Zr-MOFs by doping method provided a new strategy for fabricating novel luminescent sensors for detecting polluting small molecules.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
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2021
·Vol. 10
·期 10
·106011
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IF 2.07
Jie Yang,Bo Ruan,Wang Ni,Lung-Chang Tsai,Ning Ma,Dean Shi,Tao Jiang,Fang-Chang Tsai
Carbon dots (CDs) has been widely applied in LED diodes, sensing and bioimaging. However, the fluorescence property of CDs is limited because of the solid-state aggregation-caused quenching (ACQ). Metal-organic frameworks (MOFs), due to their high surface area, porosity and tunable pore size, are considered suitable hosts to inhibit the ACQ of CDs. Herein, the Zr-MOFs (UiO-66-(OH)2) is chosen as a host to encapsulate CDs. The dual-emitting CDs@MOFs system is constructed, which overcomes the problem of solid-state aggregation-caused quenching of carbon dots to gain the blue-emitting CDs@UiO-66-(OH)2. With the volume of CDs increased, the fluorescence of CDs@UiO-66-(OH)2 has changed simultaneously. When the volume reaches 3 ml, CDs@UiO-66-(OH)2 begin to cause fluorescence quenching. The correlated color temperatures (CCT) of CDs@UiO-66-(OH)2 are transformed from cold light to warm light. That can be further researched in electroluminescent diodes, ion-sensor, environmental monitoring, biological imaging and developments in other related biochemical fields.
研究领域:
材料科学
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生物成像
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传感技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yuling Ma,Airong Li,Cheng Wang,Xingbo Ge
Phosphotungstic acid (H 3 PW 12 O 40 , HPW) exhibits a good desulfurization performance towards the oxidative desulfurization (ODS) of oil-derived fuels. However, it presents two drawbacks: a small specific surface area and poor recovery. In this work, HPW was loaded on the support UiO-66 with a stable structure and large specific surface area, and a family of HPW@UiO-66 catalysts was prepared. Based on the structure and property analyses of powder FT-IR, ICP-OES, XRD, SEM, TG and BET, 0.5-HPW@UiO-66 with defects possessed a high crystallinity, regular morphology, stable structure and dispersed HPW clusters. The removal efficiency of DBT reached 100% and was maintained at 94.70% after 12 times of repeated use under the optimal reaction conditions. The results showed that the catalytic performance of HPW@UiO-66 catalyst for model oil desulfurization was improved when the defects existed.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
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2024
·Vol. 30
·期 3
·377-387
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IF 3
Ma Yuling,Li Airong,Wang Zhihong,Wang Cheng
There is an urgent need to address sulfur dioxide (SO 2 ) from the burning of fossil fuels, which poses a serious hazard to the surrounding environment due to its emission. In this work, UiO-66-type metal–organic framework materials (MOFs) were prepared by hydrothermal method and applied to flue gas desulfurization. Through characterization analysis, it was found that UiO-66 sample had high crystallinity and good thermal stability. Besides, UiO-66 sample had a large specific surface area (1423 m 2 /g) and a large pore volume (0.69 cm 3 /g). In the desulfurization experiments of SO 2 /CO 2 /O 2 /N 2 gas mixture (0.3/10.0/5.5/84.2 vol.%), UiO-66 had a breakthrough time of 137.6 min/g for SO 2 , the high selectivity of SO 2 /CO 2 (36.0), and strong acid resistance. Besides, the adsorption thermodynamic analysis can confirm that the adsorption process of UiO-66 for SO 2 was a combination of physical adsorption and chemical adsorption. At 1.0 bar and 298 K, the adsorption capacity of SO 2 on UiO-66 reached 8.12 mmol/g.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shenghui Ning,Fuchao Yang,Guangyi Tian,Dongyin Li,Zhiguang Guo
As the pollution of oily wastewater becomes more and more serious, it has a great negative impact on the ecosystem and human health. How to achieve efficient oil-water separation has become a common ecological problem all over the world. Therefore, it is extremely significant to develop innovative and efficient oil-water separation membranes. Past studies have shown that the metal-organic framework material UiO-66 (Zr), which has free carboxyl groups, is not only hydrophilic but also has good stability. Inspired by this, an ingenious method for a polydopamine (PDA) and metal-organic skeleton UiO-66(Zr) coating anchoring on cotton fabric surface was proposed, and the final product was denoted as CF-PDA@CS@UiO-66-COOH fabrics. Particularly noteworthy is that the separation efficiency of CF-PDA@CS@UiO-66-COOH for various organics exceeded 99.83 %, the water flux was achieved to 100744.5 L/(m 2 ·h). After 20 cycles, the separation efficiency exceeded 99.81 % and the water flux always surpassed 75067.9 L/(m 2 ·h). In addition, the prepared membranes were able to maintain excellent underwater superoleophobic properties even under acidic or alkaline environmental conditions or after 50 sandpaper abrasion cycles. And it also has excellent self-cleaning and anti-fouling. These excellent properties are due to the strong anchoring between CF, PDA, CS and UiO-66-COOH. This facile and scalable functional fabric could be applied to a wide range of oil-water separation and facilitate the development of high flux separation devices.
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
危险品化学品经营许可证（带存储）