JOURNAL OF POLYMER RESEARCH
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2020
·Vol. 27
·期 3
·1-12
·
IF 2.426
Chen Yang,Jiang Lanying
In this research, an attempt has been made to prepare a membrane with high adsorption capacity and high separation efficiency for oil water. The composite membrane of UiO-66-NH 2 and polyacrylonitrile (PAN) were fabricated by electrospinning, and hydrophobic modification was carried out to obtain the oil selectivity. UiO-66-NH 2 loaded on fibers significantly enhanced the oil affinity and surface roughness of the composite membrane. The composite membrane was used for colleseed oil, kerosene, methylbenzene, methyl silicone oil and dichloromethane adsorption, and the maximum adsorption capacity were 31.5, 21.9, 19.9, 39.9, 39.7 g·g −1 , respectively, which was 32–96% higher than pure PAN adsorbent. The amount of UiO-66-NH 2 loaded on fibers accelerated the diffusion of oil in membrane and reduced the adsorption time to reach equilibrium. The adsorption process can be well described by pseudo-second-order and intra-particle diffusion model. The composite membrane also showed potential reusability. In addition, the composite membrane has excellent performance in oil/water separation, and the oil can be separated from mixture solution just under gravity. The oil flux is 2286 Lm −2 h −1 and remains 1568 Lm −2 h −1 after ten times continuous filtration. Overall, the composite PAN-MOFs-coated membrane has promising potential in practical application in oil/water separation.
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JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Yuqiong Gong,Shoujian Gao,Yangyang Tian,Yuzhang Zhu,Wangxi Fang,Zhenggong Wang,Jian Jin
In this work, ultrasmall metal-organic frameworks (MOFs) nanoparticles , UIO-66-NH 2 nanoparticles were synthesized and embedded in an ultrathin polyamide (PA) active layer via the interfacial polymerization reaction on a polydopamine-wrapped single-walled carbon nanotube film. A thin-film nanocomposite nanofiltration (TFN NF) membrane with a PA/UIO-66-NH 2 active layer as thin as 20 ± 3 nm was thus fabricated. The loading mass of the nanoparticles in the TFN NF membrane could be tuned by controlling the nanoparticles concentration in aqueous phase. Benefiting from the ultrathin thickness of active layer and the high loading mass of the MOFs nanoparticles, water permeability up to 46 L m −2 h −1 bar −1 along with a Na 2 SO 4 rejection of 97.1% was achieved, which is 53% increase of the TFC NF membrane without the addition of UIO-66-NH 2 nanoparticles. Our membrane owns the thinnest active layer in the category of TFN NF membranes reported so far and exhibits outstanding desalination performance.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiayou Liu,Xiaoxiang Huang,Lizhen Hu,Penglei Liu,Liuhu Jia,Keiko Sasaki,Zhongchao Tan,Hesheng Yu
Simultaneous avoidance of secondary air pollution and catalyst deactivation remains a challenge for existing photocatalytic removal of nitric oxide (NO). Herein, a photocatalysis-adsorption (P-A) heterojunction is synthesized for eco-friendly NO removal by facilely grinding Pd single atoms (Pd 1 ) anchored g-C 3 N 4 (48CN/Pd) with UiO-66-NH 2 (UION). Under visible-light irradiation, the 40UION-CN/Pd composite shows 93.91 % of NO removal efficiency with only 2.73 % of NO 2 emissions and negligible catalyst deactivation. The DeNO x index increases remarkably from −0.66 for 48CN/Pd to 0.86 for 40UION-CN/Pd. Furthermore, the synthesized P-A heterojunction efficiently removes NO from real flue gases produced by a domestic coal-fired stove and from SO 2 -rich flue gases. The mechanism exploration based on experimental investigations and density functional theory (DFT) calculations reveals that UION captures the NO 2 selectively produced by 48CN/Pd, simultaneously suppressing NO 2 emissions and refreshing active sites for NO photooxidation. Moreover, the results of X-ray photoelectron spectroscopy (XPS), charge density difference calculation, energy-resolved distribution of electron traps (ERDT) and in-situ Kelvin probe force microscopy (KPFM) reveal that the built-in electric field and Type-II heterojunction formed between 48CN/Pd and UION promote the separation of photogenerated carriers, enhancing the catalytic activity of the composite. This work provides an innovative strategy to avoid NO 2 emission and catalyst deactivation during photocatalytic NO removal.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 51
·111039-111050
·
IF 5.8
Dong Shiwen,Liu Xuan,Kong Xianxian,Dong Feilong,Yu Yan,Wang Lizhang,Wang Da,He Zhiqiao,Song Shuang
Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) have been proved as efficient catalysts for photocatalytic hydrogen (H 2 ) evolution, thanks to their tunable functionalities, permanent porosity, excellent visible light response, and physicochemical stability. Herein, a series of photocatalysts (termed NUBC) was fabricated by loading different amounts of Zr-UiO-66-NH 2 (NU) onto a benzoic acid–modified covalent triazine–based framework (BC) based on post-synthetic covalent modification. The resulting NUBC catalysts exhibited a type-II Z-scheme heterojunction structure formed via the amide covalent bonds between the amine groups on NU and carboxyl groups on BC. The optimal loading of NU on BC is 30 wt.% (30NUBC) and the corresponding photocatalytic H 2 evolution rate was 378 μmol h −1 g −1 , almost 445 and 2 times than that of NU and BC, respectively. The synergistic effect between the type-II Z-scheme heterojunctions and amide bonds was conducive to boosting visible light harvesting and facilitating charge transportation and separation. Furthermore, the prepared NUBC catalysts show great reusability and stability. Overall, this work sheds light on the design of novel MOF/COF hybrid materials and provides a systematic exploration of their photocatalytic H 2 evolution properties.
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PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Qin Zhang,Lijiao Fan,Wenbin Liu,Yuming Xie,Jiangang Li,Guolin Huang
The core–shell structure UiO-66-NH 2 @Ni-MOF was prepared by in-diffusion growth of 2D Ni-MOF on UiO-66-NH 2 using PVP (polyvinylpyrrolidone) as a structural guide. It was applied to the adsorption of U(VI) in aqueous solution. The materials were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive spectrometer (EDS). The UiO-66-NH 2 @Ni-MOF adsorption to U(VI) was investigated experimentally. The study showed that the adsorption of U(VI) onto UiO-66-NH 2 @Ni-MOF was endothermic and spontaneous. At pH 5.00 and 308 K, the adsorption capacity was 581.40 mg/g according to Langmuir model. In addition, the adsorption process can be described by the pseudo-second-order kinetic model. The adsorption capacity was kept at 83.83% of its original one after five sorption–desorption cycles, a promising indication for repetitive usage.
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IRANIAN POLYMER JOURNAL
·
2023
·Vol. 32
·期 8
·979-990
·
IF 3.1
Fu Mengjie,Wang Chun,Lai Xing,Xiao Changfa,Ding Ying
In terms of nanofiltration (NF) membrane development, the properties of membrane substrates and thin-film composite (TFC) structures have become an important factor to determine the separation performances of NF membrane. In this paper, the method of interfacial polymerization assisted by spacer spraying was used to construct the striped structure at nanometer scale. Nanoscale striped structure was prepared successfully on PPTA (poly( p -phenylene terephthamide)) NF surface with 1.3 g/L of UiO-66-NH 2 in the aqueous phase, and the morphology gradually changed to “point shaped” structure when 2.6 g/L of UiO-66-NH 2 in the aqueous phase. The optimized PPTA/UiO-66-NH 2 NF (PU4) membranes were used for dye/salt separation of methylene blue (MB). Compared with the nascent PPTA NF membranes, it showed a higher MB rejection rate of 98.6%, along with permeation flux of 19.79 L/m 2 \(\cdot\) h \(\cdot\) MPa. The salt separation order of the PU4 membrane was Na 2 SO 4 > MgSO 4 > MgCl 2 > NaCl. The rejection rates were 96.3%, 85.4%, 53.2%, and 18.4%, respectively. Under strong acid and alkali conditions, the separation performance was rejected 86.5%, better under alkaline conditions. More importantly, after a six-time recycle, the PU4 membrane showed no significant change in separation performance, suggesting its excellent stability. The novel strategy in this study provided an approach to develop advanced UiO-66-NH 2 membranes toward sustainable molecular separation in environmental applications. Graphical abstract
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高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Likang Fu,Shixing Wang,Guo Lin,Libo Zhang,Qiming Liu,Houhuang Zhou,Chenxia Kang,Shuyun Wan,Hongwei Li,Sheng Wen
A new metal organic framework UiO-66-RSA (UiO-66 with hydroxyl) was prepared by the post-modification of UiO-66-NH 2 (UiO-66 with amino) with resorcyl aldehyde and was employed for the efficient and selective separation and removal of Pb(II) in aqueous media . The maximum adsorption amount of UiO-66-RSA was 189.8 mg/g at an optimal pH of 4. The adsorption isotherm and kinetic were well described by Langmuir/Dubinin-Radushkevich and pseudo-second-order models respectively. Adsorption process was monolayer chemisorption . UiO-66-RSA was regenerated by thiourea/nitric acid and the removal rate was only decreased by 3.7% after five successive cycles. The analysis of X-ray photoelectron spectroscopy suggested the adsorption mechanism lay on the complexation reaction between hydroxyl/nitrogen-containing groups and Pb(II). The UiO-66-RSA bound Pb(II) by forming double/quadri coordinated complexes. Compared with a multitude of usual metal ions , viz., Zn(II), Co(IV), Ni(II), Mg(II), Cd(II), Cu(II) and Ca(II), the Pb(II) could be absorbed selectively by UiO-66-RSA. The results indicated that the UiO-66-RSA sorbent could be of great potential in the removal of Pb(II) from aqueous solutions.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Shipeng Wan,Man Ou,Qin Zhong,Xinming Wang
Base-on the excellent optoelectronic properties, perovskite CsPbBr 3 quantum dots (QDs) have been used on perovskite solar cells and LED devices, but little research has been focused on photochemical CO 2 reduction due to their poor moisture stability. Coincidentally, metal-organic frameworks (MOFs) materials have received tremendous attention for sustainable clean energy and environmental remediation. However, the design of excellent performed MOFs is still indispensable. Therefore, the CsPbBr 3 QDs/UiO-66(NH 2 ) nanocomposites that combine the advantages of CsPbBr 3 QDs and UiO-66(NH 2 ) have been successfully designed and fabricated for the first time. Then we employ the nanocomposites as photocatalysts to convert CO 2 to chemical fuels in nonaqueous media. The resultant nanocomposites exhibit significantly improved photocatalytic activity for CO 2 reduction. When CsPbBr 3 QDs content is 15 wt%, the amount of CO can reach 98.57 μmol·g −1 . The remarkable photocatalytic performance could be ascribed to the improved electron extraction and transfer between UiO-66(NH 2 ) and CsPbBr 3 QDs, large accessible specific surface area and enhanced visible light absorption capacity. Moreover, the nanojunction shows excellent reusability for photocatalytic CO 2 reduction. This work might supply new pathway to utilize halide perovskite QDs/MOF nanocomposite in energy conversion and environmental remediation.
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ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Juan Yang,Lite Yang,Huili Ye,Faqiong Zhao,Baizhao Zeng
In this work, highly dispersed AuPd alloy nanoparticles (NPs, 3–6 nm) decorated amino-functionalized Zr(IV)-based metal–organic framework (i.e. UiO-66-NH 2 ) was prepared via a novel adsorption/reduction method in ethanol-water solution. In this process, the UiO-66-NH 2 acted as both supporting platform and protective agent. The pores of UiO-66-NH 2 could limit the aggregation and migration of AuPd alloy NPs. The resulting AuPd/UiO-66-NH 2 catalyst possessed large specific surface area and excellent stability and dispersity in aqueous media. When it was used to construct a nitrite sensor, the composite material exhibited higher catalytic activity than the metal counterparts (i.e., Au/UiO-66-NH 2 and Pd/UiO-66-NH 2 ) due to the strong metallic synergistic effect. The electrochemical study demonstrated that the AuPd/UiO-66-NH 2 based sensor had an extended linear response concentration range of 0.05–5666 μ M for nitrite detection, with a detection limit of 0.01 μ M. It was successfully applied to determine nitrite in sausage and pickle samples.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
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 Environmental Chemical Engineering
·
2024
·
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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高影响因子
Nano Research
·
2024
·
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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