COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Rui Duan,Hongjuan Wu,Jiahe Li,Zhaoxi Zhou,Weihua Meng,Lei Liu,Hongqiang Qu,Jianzhong Xu
Phosphor nitrile functionalized UiO-66-NH 2 /graphene (G-U-H) was prepared combined a green mechanochemical method and microwave-assisted rapid method to improve the fire safety of epoxy resin (EP). The scanning electronic microscopy, transmission electron microscope and X-ray diffraction results indicated that the G-U-H exhibited sandwich-like hybrid structure. And the -OH from graphene nanoplatelets and -NH 2 from UiO-66-NH 2 were grafted with hexachlorocyclotriphosphazene to form covalent bonds . The obtained flame retardant was added to the EP at a different content. The flame retardancy index and cure index of EP composites were calculated, and those of EP-3 were both good. The cone calorimetry test showed that the flame retardancy of EP was improved and the flame retardant mechanism is the combination of condensed phase and gas phase with the synergistic of P, N and other elements. The physical barrier of graphene nanoplatelets and the generated more stable and denser residual char in condensed phase can effectively cut off the heat and mass transmission. In gas phase, the non-flammable gases were generated to help reduce the heat released.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Yi Zhang,Di Liu,Zhaoli Wang,Junjian Yu,Yanyin Cheng,Wenjing Li,Zhe Wang,Hongzhe Ni,Yuchao Wang
For the reduction of bovine serum proteins from wastewater, a novel mixed matrix membrane was prepared by functionalizing the substrate material poly aryl ether ketone followed with carboxyl groups(C-SPAEKS) and then addition of amino-functionalized UiO-66-NH 2 (Am-UiO-66-NH 2 ). Amino-functionalization of UiO-66 was accomplished by melamine, followed by an amidation reaction to immobilize Am-UiO-66-NH 2 was immobilized on the surface of the membrane as well as in the pore channels, which enhanced the hydrophilicity of the membrane surface while increasing the negative potential of the membrane surface. This nanoparticle-loaded ultrafiltration membrane has good permeation performance with a pure water flux of up to 482.3 L·m –2 ·h –1 for C-SPAEKS/Am-UiO-66-NH 2 and a retention rate of up to 98.7% for BSA-contaminated solutions. Meanwhile, after several hydrophilic modifications, the flux recovery of BSA contaminants by this series of membranes was increased from 56.2% to 80.55% of pure membranes. The results of ultrafiltration flux time tests performed at room temperature showed that the series of ultrafiltration membranes remained relatively stable over a test time of 300 min. Thus, the newly developed mixed matrix membrane showed potential for high efficiency and stability in the wastewater treatment containing bovine serum proteins.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Shanna An,Min Ma,Zhanning Liu,Jian Tian
A general strategy to enhance NO 3 RR performance is proposed by incorporating Lewis-acidic ions into the UiO-66. • Fe-UiO-66 exhibits enhanced NO 3 RR performance, achieving an NH 3 yield rate of 2.34 mg h −1 cm −2 at −0.69 V vs. RHE. • Fe incorporation facilities H 2 O activation and promotes the generation and utilization of surface *H. • Key reaction intermediates are captured by in-situ FTIR spectroscopy and DEMS, confirming the proposed reaction pathway. Electrochemical nitrate reduction (NO 3 RR) is a promising approach for decentralized ammonia synthesis, yet its efficiency is limited by sluggish nitrate activation and competing hydrogen evolution (HER). Inspired by electronic structure modulation, a strategy is presented in which Lewis-acidic ions are incorporated into the UiO-66 framework to promote NO 3 RR kinetics. Among, Fe-UiO-66 demonstrates substantially enhanced NO 3 RR performance, delivering an NH 3 yield of 2.34 mg h −1 cm −2 with a Faradaic efficiency (FE) of 96.25% at −0.69 V vs. RHE, corresponding to nearly a 13-fold increase relative to pristine UiO-66 (0.179 mg h −1 cm −2 , 33.36%). Experimental and theoretical analyses reveal that the Fe incorporation induces local electronic reconstruction and electron accumulation at the Fe centers, thereby strengthening NO 3 - adsorption and facilitating its activation. Moreover, electrochemical and isotope labeling results indicate that Fe incorporation facilitates H 2 O activation and promotes the generation and utilization of surface *H, thereby accelerating the hydrogenation of nitrogen-containing intermediates. In-situ FTIR spectroscopy together with online DEMS identifies the key reaction intermediates, supporting the proposed reaction pathway. This work highlights electronic structure reconstruction as an effective strategy for regulating nitrate adsorption and subsequent intermediate hydrogenation, providing mechanistic insights and design guidance for efficient MOF-based NO 3 RR electrocatalysts. Download: Download high-res image (213KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Junna Yan,Mengyu Ma,Bo Zhao,Feihu Li
Excessive discharge of phosphorus (P) to natural watercourses not only causes eutrophication of water bodies but also results in the loss of P resources. P-containing wastewater is a crucial secondary P resource. Zirconium-based metal-organic frameworks (MOFs), particularly UiO-66 has been shown great promise in efficiently capturing P from water. In this study, a group of UiO-66@sponge composites was prepared by a facile layer-by-layer in-situ growth approach using melamine sponge (MS) as scaffolds. The as-prepared UiO-66@sponge composites exhibit high chemical and dimensional stability when used as adsorbents for reclaiming P from wastewater. Batch adsorption results show that one UiO-66@sponge composite exhibited the highest phosphorus adsorption capacity of 83.55 mg g −1 at pH 6.0, outperforming most other UiO-66 adsorbents under environmentally relevant conditions. The intrinsic mechanical flexibility and chemical stability of these UiO-66@sponge composites enable us to efficiently enrich phosphorus from a dilute solution by a rapid adsorption-desorption operation. This work provides a promising strategy to integrate MOFs with dimensionally stable and flexible sponges for rapid adsorption and recovery of phosphate from wastewater and could be potentially expanded to the recovery of other value-added or technology-critical elements from waste streams.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 22
·50519
·
IF 3.125
Wei Wang,Peng Zhang,Yaping Shi,Zhichao Zhang,Xin Xu,Ping Ding
The composite membrane with the advantages of high separation efficiency and wide application, has been widely concerned in the field of water purification and molecular separation. However, the common composite membrane cannot achieve continuity, or the grafting process is complex, which significantly hinders its further development. In this work, the in-situ polymerization of UiO-66/PVDF supramolecular flat membranes as the continuous and high-performance composite membrane can be easily synthesized using the supramolecular force, (such as, hydrogen bond, etc.). These supramolecular membranes exhibit good hydrophilic (61°) and anti-fouling performance for bovine serum albumin (BSA) solution with rejection rate 97.79% than the original membrane. Moreover, this membrane can achieve more MOF doping based on maintaining the membrane performance, which undoubtedly greatly improves its hydrophilicity and mechanical properties. In addition, we also characterized the porous microstructure of the UiO-66/PVDF supramolecular membrane to analyze the influence of different doping amounts on the membrane structure. This supramolecular membrane has the advantages of simple synthesis, good hydrophilicity and water separation performance, which provides a more convenient and effective way for the preparation of MOFs/polymer flat membrane, and also provides a new method and new idea for expanding the application of MOFs/polymer ultrafiltration membrane in water treatment.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Xu Zheng,QianLing Ma,Jianming Tan,Bo Yu
Dehumidification performance of a high-efficient compact desiccant cooling component named desiccant-coated heat exchanger (DCHE) highly depends on coated desiccant materials. Currently, mesoporous silica gels and salt-supported silica gels have been extensively studied. Silica gels have limited adsorption quantity in the middle relative pressure range, while salt-supported silica gels have potential threat of corrosion. In this work, a metal–organic framework UiO-66 that can achieve good adsorption quantity without corrosion is reported. The equilibrium adsorption test shows that UiO-66 has promising water uptake, especially in the relative pressure range of 0.35–0.65. The adsorption kinetics test displays that UiO-66 exhibits desirable dynamic water uptakes and adsorption rate constant. Dehumidification capacities of a DCHE using UiO-66 are estimated via a mathematical model and compared with silica gel- (SG) and LiCl-supported silica gel (SG/LiCl). Simulation results show that UiO-66 has better dehumidification performance than both SG- and SG/LiCl-coated samples for semiarid and semihumid climates when outdoor temperature is lower than 36 °C. Especially, when the temperature and relative pressure of inlet air are set as 30 °C and 0.35, respectively, its dehumidification capacity can be 2.7 times the amount of the SG-coated one and 1.3 times of the SG/LiCl-coated one. However, it should be more prudent in choosing UiO-66 under hot and humid climates.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yawen Tan,Yi Zhou,Yuehong Deng,Haiqin Tang,Hao Zou,Yifeng Xu,Jiaxin Li
The introduction of metal-organic frameworks into semiconductor photocatalysts is one of the strategies to improve the separation efficiency of electron-hole pairs. In this study, UiO-66-NH 2 /Bi 2 WO 6 nano-heterojunction was constructed for the first time by introducing UiO-66-NH 2 into the Bi 2 WO 6 precursor solution. A series of characterizations such as XRD , XPS and FT-IR have indicated that the successful synthesis of the composites and showed that UiO-66-NH 2 and Bi 2 WO 6 are tightly connected and interacted. SEM results showed that the introduction of UiO-66-NH 2 can increase the distance between bismuth tungstate nanosheets and effectively inhibit the agglomeration of Bi 2 WO 6 . The visible light degradation efficiency of 6% UiO-66-NH 2 /Bi 2 WO 6 can reach 99.7%. The improvement of photocatalytic activity could be attributed to the formation of a type II heterojunction in the composite, which effectively promoting the separation of electron and holes.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-11
·
IF 5.833
Li Jingxian,Jiang Ding,Shan Xueling,Wang Wenchang,Ou Guofu,Jin Haozhe,Chen Zhidong
A novel aptasensor has been fabricated based on the resonance energy transform (RET) system from MoS 2 QDs-PATP/PTCA (donor) to NH 2 -UiO-66 (acceptor). The electrochemiluminescence (ECL) signal of PTCA was greatly amplified due to the decoration of MoS 2 QDs-PATP, and the NH 2 -UiO-66 was utilized to label the signal probe DNA (pDNA), which hybridizes with the exposed aptamer anchored on the surface of MoS 2 QDs-PATP/PTCA. With the target acetamiprid, the specific binding of acetamiprid to aptamer causes the connection between the donor and the acceptor to be interrupted and produce an “on” ECL signal. Thus, an “off-on” ECL sensing platform for sensitive and selective acetamiprid assay was designed. Under the optimal condition, the ECL signal of the aptasensor was found to be linearly related to the logarithm of the acetamiprid concentration ranging from 0.1 fM to 0.1 μM with a detection limit of 0.064 fM. More importantly, the recovery rate of the ECL aptasensor was calculated to be 98.7 ~ 106% with a RSD lower 5.1% for the residual acetamiprid assay in real food samples, which indicated that the aptasensor has high potential for practical applications. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 151
·期 3
·734-747
·
IF 2.482
Zhang Xiaorui,Chen Chen,Jiang Caiyun,Zhou Haifei,Cao Wang,Wang Yuping
Abstract A new type of Ag 3 PO 4 /UiO-66-NH 2 Z-scheme heterojunction nanocomposite with visible light catalytic activity was successfully prepared. The synthesis of the composite was confirmed by XRD, FT-IR, SEM, TEM, EDS, XPS. The Ag 3 PO 4 /UiO-66-NH 2 Z-scheme heterojunction can effectively improve the utilization of visible light. The optimal Ag/U/1/4 composite has the highest degradation efficiency for methylene blue (MB, 30 mg/L) in 90 min (80%) and Norfloxacin (NOR, 10 mg/L) in 150 min (85%). The decrease of Nyquist radius and the enhancement of photocurrent response indicated that the combination of photogenerated electron–hole pair in Ag 3 PO 4 /UiO-66-NH 2 composite material is significantly inhibited. N 2 adsorption–desorption and zeta potential results indicated that biggish specific surface area and negative zeta potential value are more favorable for the adsorption of the cationic dye MB. The cyclic test verified the good stability of Ag 3 PO 4 /UiO-66-NH 2 heterojunction material. Furthermore, the photocatalytic degradation mechanism of MB was discussed by introducing different traps to inhibit the possible active substances in the degradation process. This work testified that an efficient photocatalytic composite based on metal–organic frameworks can be used for the degradation of pollutants. Graphic Abstract
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2020
·
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.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xun Fang,Shibiao Wu,Yaohua Wu,Wu Yang,Yulian Li,Junyong He,Peidong Hong,Mingxing Nie,Chao Xie,Zijian Wu,Kaisheng Zhang,Lingtao Kong,Jinhuai Liu
Antibiotics abuse has been a significant threat to the environment and human health. In this study, we successfully synthesized highly stable amino-functionalized Zr-based metal–organic frameworks (UiO-66-NH 2 ) and studied the adsorption behaviors of norfloxacin (NOR) in water. The adsorption capacities of UiO-66-NH 2 reached a maximum of 222.5 mg/g for NOR, which were considerably higher than that of most reported adsorbents. Moreover, the equilibrium time (6 h) was less than that of several previously reported adsorbents. Ionic-strength-influenced experiments showed that NaCl and CaCl 2 aqueous solutions could improve the removal efficiency of NOR. The presence of humic acid could barely affect the adsorption amount. At a concentration of 10 mg/L, the highest partition coefficient of 20.9 mg/g/µM was obtained, and the removal rate of NOR was as high as 91.6%, implying that UiO-66-NH 2 offered considerable adsorption performance at a low concentration of NOR. In addition, UiO-66-NH 2 exhibited good regeneration efficiency, thus offering the possibility to remove norfloxacin from sewage. Finally, several credible adsorption mechanisms were proposed. The results will aid us to comprehend the surface interaction between organic micropollutants and UiO-66-NH 2 and prefigure the potential of UiO-66-NH 2 as a novel adsorbent for the removal of NOR.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Linna Song,Tianyu Zhao,Dongzhi Yang,Xuejiao Wang,Xinmin Hao,Yaxin Liu,Shiyi Zhang,Zhong-Zhen Yu
Lightweight and wearable fabrics with rapid self-detoxification functions are highly desired to resist chemical warfare agents (CWAs). Metal organic frameworks (MOFs) with high specific surface area and customizability are singularly attractive because of their ability to effectively capture and catalytically degrade CWAs. Herein, photothermal graphene-based nanocomposite fabrics are designed by wet-spinning and chemical reduction of graphene oxide fibers followed by in situ growth of UiO-66-NH 2 . The flexible graphene fabrics decorated with UiO-66-NH 2 nanoparticles exhibit an ultrafast photothermal catalytic decontamination of dimethyl 4-nitrophenyl phosphate (DMNP), a typical simulant of CWAs. The half-life of the degradation reaction decreases from 3.4 to 1.6 min under simulated solar light irradiation, a significant gain over the values reported in the literature. Furthermore, DMNP can be degraded in 20 min by the graphene/UiO-66-NH 2 fabric, and even after 5 cycles the degradation efficiency still retains more than 92 %. More importantly, the photothermal conversion of graphene and its instantaneous heat transfer to the UiO-66-NH 2 catalyst effectively accelerate the catalytic reaction kinetics, achieving the fast detoxification of DMNP. The combination of catalytic degradation of MOFs with photothermal conversion effect of graphene makes the lightweight and flexible fabrics promising for protection against CWAs and other pollutants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）