SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yan Huang,Qiang Zuo,Mengyang Yin,Jingzhen Wang,Boqiang Gao,Jia Song,Xiaodang Tang,Yali Zhang,Shuanglong Ma,Dangling Hua,Rui Wang
The efficient removal of H 2 S is necessary for clean production and energy safety. However, industrial gases are usually accompanied by CO 2 significantly affecting desulfurization effects. Hence, novel imprinted adsorbents (PMo 12 @UiO-66@H 2 S-MIP-CDs) were synthesized through surface imprinting technology using cyclodextrins (CDs) as molecular scaffolds and UiO-66 modified by phosphomolybdic acid (PMo 12 @UiO-66) as a support. Wherein, PMo 12 @UiO-66@H 2 S-MIP-β-CD was determined as the optimal adsorbent since β-CD with low solubility is prone to keep its inherent cavity to promote dispersion of imprinted polymers and enrich internal pore channels. H 2 S capacity of PMo 12 @UiO-66@H 2 S-MIP-β-CD (31.67 mg/g) was about 2.4 and 1.7 times that of PMo 12 @UiO-66 and PMo 12 @UiO-66@H 2 S-MIPs, respectively, revealing the remarkable contribution of β-CD as a molecular scaffold to improve desulfurization. The results showed that PMo 12 @UiO-66@H 2 S-MIP-β-CD can maintain stable desulfurization efficiency regardless of the presence of CO 2 or moisture, and O 2 can strengthen the redox reaction between H 2 S and PMo 12 accompanied by the increased reduction degree of Mo 6+ in PMo 12 . After five adsorption-regeneration cycles, PMo 12 @UiO-66@H 2 S-MIP-β-CD still exhibited ideal removal efficiency. The excellent desulfurization performance is mainly ascribed to the selective adsorption role of H 2 S-MIP-β-CD and oxidative removal ability of PMo 12 . This work provides a valuable reference for the directional design of high-capacity functional adsorbents for room-temperature desulfurization.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yongbo He,Mengqi Liu,Linzhi Zhai,Hongshuang Li,Peng Song,Xiufang Zhu,Yubin Tang
The metal organic framework (MOF) polycrystalline membranes on stainless steel mesh (SSM) are urgently required for effective oil-water separation, but the affordable preparation still remains a challenge. Herein, we report a series of UiO-66-NH 2 /SSM films, which are developed by a rational ‘seeding-assisted secondary growth’ method. Results depict that the proposed method greatly shortens the synthesis time, and helps to achieve a continuous and uniform modification of UiO-66-NH 2 on SSM, and hence contributes to a superior hydrophilicity and superoleophobicity for UiO-66-NH 2 /SSM with minimum water contact angle of 32° and maximum underwater oil contact angle of 150°, respectively. Specifically, the UiO-66-NH 2 /SSM-600–2 has total permeation fluxes and separation efficiencies of ca. 8.4×10 4 L·m −2 ·h −1 and 100% for the n-hexane-, petroleum ether- and chloroform-water emulsions (1% volume ratio), which exceed numerous polycrystalline membranes reported so far. It also exhibits a great durability with only 0.1% loss of separation efficiency after 8 cycles. Furthermore, outstanding acid-resistivity and salt-tolerance are also presented. Our work supplies a new strategy to construct UiO-66-NH 2 /SSM, and the decent properties confirm a huge potential for practical use in oil-water separation.
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APPLIED CATALYSIS A-GENERAL
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2024
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IF 4.7
Yating Xie,Nicui Yuan,Hongyang Liu,Lukai Luo,Jun Gong,Xiping Yin,Tengfei Li,Yonghua Zhou
Defect engineering by creating oxygen vacancies (OVs) and heterogeneous frustrated Lewis acid-base pairs (FLPs) emerged as an efficient strategy to enhance the selective conversion CO 2 to CH 4 . Considering the intrinsic FLPs contained in UiO-66-NH 2 (UNH for abbreviation), in this paper, the OVs was introduced therein by fabricating the Ce-doped UNH (denoted as UNH(Ce/Zr)) via one-step solvothermal route. The as-prepared UNH(Ce/Zr) catalyst exhibited the CH 4 yield of 31.02 μmol·g −1 ·h −1 accompanied with the CH 4 selectivity of 93 % and satisfying recycling stability. The XRD, SEM, FT-IR, XPS, TG, TPD and NH 3 in situ DRIFTS and in situ FT-IR characterization results justified that the UNH(Ce/Zr) possess the obviously increased OVs sites and enhanced Lewis acidic and basic properties. Additionally, the photoelectrochemical characterization results showed that UNH(Ce/Zr)−0.014 efficiently improved photogenerated electron-hole separation efficiency and charge transfer rate. It could be concluded that it was the cooperative action of OVs and FLPs that led to the high CH 4 selectivity and CH 4 yield.
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Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Liu Yuhao,Wang Xuyi,Chen Jiayue,Wang Hua,Cheng Ming,Zheng Dan,Zhang Beibo,Geng Liang,Chen Liping,Jia Yingbin,Wang Luoxin
In this work, we synthesized core-shell NH 2 -UiO-66@UiO-67 via a solvothermal method to achieve controlled assembly of amino-modified UiO-66 and UiO-67 at micro and nano scale. NH 2 -UiO-66@UiO-67 exhibited notable visible light responsiveness and an increased specific surface area.In addition, it demonstrated outstanding performance in Cr(VI) removal, which can be attributed to the photocatalytic conversion of Cr(VI) into less toxic Cr(III), and the adjustable pores and large specific surface area facilitating Cr(III) adsorption. Notably, it exhibited a robust removal efficiency across a wide pH range of 2.0 to 10.0. Specifically, at pH = 2.0, the Cr(VI) solution with a concentration of 60 mg/L was completely removed within 140 min. The results show that the adsorption of core-shell NH 2 -UiO-66@UiO-67 meets the pseudo-second-order adsorption kinetics and has the ability of photocatalytic reduction of Cr (VI).
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Materials Today Communications
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2025
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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.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Zhaohuang Zhong,Lang Li,Siwei Yu,Xindong Li,Haike Li,Jianghui Jia,Jiaju Huang,Meng Cai,Wanfu Huang
With the growing complexity of separation systems, the application of thin film composite nanofiltration (TFN) membranes in organic solvent separation faces numerous challenges. To augment its solvent stability, an in-situ constructed dopamine hydrogel doped with UiO-66@CNT was developed as an intermediate layer on a polyetherimide (PEI) ultrafiltration membrane. Subsequent interfacial polymerization on this interlayer led to the formation of a solvent-resistant nanofiltration membrane with a vast covalent bond structure, large specific surface area, and enhanced hydrophilicity. Our findings revealed that when the CNT loading in the UiO-66@CNT composite nanoparticles was 2 wt%, the TFN-U 2 C 2 membrane exhibited a maximum pure water flux of 126.32 L/(m 2 ·h) and a methanol flux of 45.45 L/(m 2 ·h). The rejection rates for Congo red aqueous and methanol solutions were 96.88% and 92.14%, respectively. The membrane also demonstrated commendable anti-fouling properties. Remarkably, even after 48 h of immersion in various organic solvents, the membrane retained its morphology and separation efficiency. Compared to the TFN-U 2 membrane without CNT addition, the enhancement in separation performance was considerably significant. Hence, this membrane has significant potential for application in treatment of wastewater containing organic solvents and is promising in related fields.
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SOLID STATE SCIENCES
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2024
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IF 3.4
Nan Li,Mianmian Wu,Zhimin Guo,Qingfei Li,Guifang Sun,Wenjing Shen,Minghao Shi,Jiangquan Ma
Piezoelectric materials can harvest mechanical energy and convert it into electrical energy, which have lately become highly effective catalysts to sustainable eliminate pollutants. Here, by adding different surfactants to metal-organic framework adenine-UiO-66 (AD-U) materials, the metal-organic framework adenine-UiO-66 (AD-U-S) modified by sodium dodecyl benzene sulfonate (SDBS) and the metal-organic framework adenine-UiO-66 (AD-U-C) modified by cetyltrimethylammonium bromide (CTAB) were prepared for the first time. With the antibiotic diclofenac sodium (DCF) as the target pollutant, the degradation efficiencies of AD-U-S (0.30) and AD-U-C (0.30) were 98 % and 78 % in 30 min, respectively. Specially, the reaction rate constant of AD-U-S (0.30) is 3.5 times that of AD-U-C (0.30). The performance improvement is due to the larger specific surface area, stronger ferroelectric properties , enhanced oxidation capability and higher charge transfer efficiency of AD-U-S (0.30) than that of AD-U-C (0.30). The capture experiments showed that ‧OH and h + were the main active species on AD-U-S (0.30) and AD-U-C (0.30) during the removal of DCF. In addition, possible pathways for DCF piezodegradation were obtained by liquid-phase mass spectrometry and DFT calculations. This study is benefit to promote the development of piezocatalytic technology for wastewater treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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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.
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Nano Research
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2024
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IF 9.5
Huang Danru,Wu Lin,Kang Qi,Shen Zhiyong,Huang Qiaosheng,Lin Wenjie,Pei Fei,Huang Yunhui
Solid-state polymer electrolytes (SPEs) are candidate schemes for meeting the safety and energy density needs of advanced lithium-based battery because of their improved mechanical and electrochemical stability compared to traditional liquid electrolytes. However, low ionic conductivity and side reactions occurring in traditional high-voltage lithium metal batteries (LMBs) hinder their practical applications. Here, amino-modified metal-organic frameworks (UiO-66-NH 2 ) with abundant defects as multifunctional fillers in the polyurethane based SPEs achieve the collaborative promotion of the mechanical strength and room temperature ionic conductivity. The surface modified amino groups serve as anchoring points for oxygen atoms of polymer chains, forming a firmly hydrogen-bond interface with polycarbonate-based polyurethane frameworks. The rich interfaces between UiO-66-NH 2 and polymers dramatically decrease the crystallization of polymer chains and reduce ion transport impedance, which markedly boosted the ionic conductivity to 2.1 × 10 −4 S·cm −1 with a high Li + transference numbers of 0.71. As a result, LiFePO 4 ∣SPEs∣Li cells exhibit prominent cyclability for 700 cycles under 0.5 C with 96.5% capacity retention. The LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622)∣SPEs∣Li cells deliver excellent long-term lifespan for 260 cycles with a high capacity retention of 91.9% and high average Coulombic efficiency (98.5%) under ambient conditions. This simple and effective hybrid SPE design strategy sheds a milestone significance light for high-voltage Li-metal batteries.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yiran Wang,Xiaolong Sun,Yufeng Zhou,Jiachen Liu,Huayue Zhu,Ru Jiang,Yingjie Miao,Yongqian Fu
Quercetin (QCT) is a flavonoid with significant health benefits, necessitating sensitive detection methods for food safety and quality control . This study presents a novel UiO-66-TCPP ratiometric fluorescent probe for the quantitative and visual detection of QCT. Under optimal conditions, the fluorescence intensity of UiO-66-TCPP decreased linearly with increasing QCT concentration, with a detection limit of 26 nM. The probe demonstrated high specificity, showing no significant interference from various substances and QCT analogues. Practical applicability was confirmed by testing artificially contaminated juice samples, achieving recovery rates between 98.0% and 104.8%. Furthermore, a paper-based sensor was developed by incorporating UiO-66-TCPP onto Whatman#1 chromatography paper . This sensor exhibited stable fluorescence and a reliable, sensitive visual response to QCT concentrations, detectable via a smartphone-based color recognizer application. The UiO-66-TCPP ratiometric fluorescent probe provides a sensitive, specific, and practical method for detecting QCT in food matrices, offering significant potential for both laboratory and on-site applications.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Ke Wu,Zhimin Yang,Sen Liu,Xishuang Liang,Teng Fei,Tong Zhang
Numerous applications require low humidity sensors that not only sensitive but also stable, small hysteresis, high resolution and fast response. However, most reported low humidity sensors cannot possess these properties at the same time. In this work, inspired by sea urchin , we developed an ionic liquid (IL) modified metal organic framework (UiO-66) based low humidity sensor. Owing to the synergistic effect of the hydrophilicity and ionic conductivity of IL and the steric hindrance effects of UiO-66, the optimized low humidity sensor simultaneously exhibits high response (47.5), small hysteresis (0.3 % RH), ultrafast response speed (0.2 s), high resolution (1 % RH), and excellent long-term stability (>120 days). In particular, the sensor has been proved to have potential applications in visual humidity detection and water source location. This work provides a preliminary design principle that will contribute to the preparation of high-performance low humidity sensing materials.
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PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 13
·e202303633
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IF 1.9
Mingyan Chen,Wentao Wang,Xinkai Feng,Dehua Zhang,Yao Zhang,Yucheng Liu
Graphical This work describes the application of a highly efficient catalyst (NH 2 -UiO-66-Mo) to the catalytic oxidation desulfurization process. NH 2 -UiO-66-Mo can greatly improve the efficiency of oxidative desulfurization The optimum operating conditions of NH 2 -UiO-66-Mo are investigated through experiments, which prove the excellent performance of the catalyst, and the reaction mechanism is further studied through a series of characterizations. A highly efficient oxidative desulfurization composite catalyst NH 2 -Uio-66-Mo has been prepared and applied in the catalytic oxidative desulfurization. It was elucidated that Mo 6+ could increase the oxygen vacancies and active sites on the catalyst and increase the pore size of UiO-66. Meanwhile, the removal rate of dibenzothiophene (DBT) reached 99.2 % after 60 min under optimal conditions and remained above 90 % after 5 cycles, showing the composite catalyst's remarkable catalytic performance and satisfactory reusability NH 2 -UiO-66-Mo. In addition, kinetic studies revealed that the desulfurization process can present a pseudo-first-order kinetic process. The apparent activation energy was 10.6 kJ/mol. Finally, in combination with oxides, possible oxidation pathways were identified.
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