LANGMUIR
·
2023
·
IF 3.9
Pingtao Ming,Yuanyuan Niu,Yongxin Liu,Jinhao Wang,Haohong Lai,Qing Zhou,Haiyun Zhai
In this study, the synthesis of Cu-MOF-199@multiwalled carbon nanotubes (Cu-MOF-199@MWCNTs) composites was achieved and utilized to create an advanced electrochemical sensor for creatinine (Cre) detection. The composites were modified on a glassy carbon electrode surface through direct drip coating, followed by the deposition of copper nanoparticles (CuNPs) via constant potential deposition. Characterized by various techniques and electrochemical analyses, the Cu-MOF-199@MWCNTs composite increased the CuNPs load, improving the detection sensitivity for Cre. Under optimal conditions, the modified electrode exhibited good linearity across a broad range of Cre concentrations (0.05–40.0 μM) with a low detection limit of 11.3 nM. The developed sensor demonstrated remarkable stability, reproducibility, and selectivity, showing promise in sensitive and accurate Cre detection in serum samples.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Jie Xu,Hongji Li,Huimin Feng,Yuqin Ma,Dandan Wang,Jianwei Zhu
The removal of refractory organic contaminants in the environment is vital, but developing highly active catalysts with a simple synthesis process remains a challenge. Herein, NH 2 -MIL-125(Ti) (Ti-MOF) as a template, Ti 3+ -TiO x clusters of different quantities were embedded in the CdIn 2 S 4 nanosheets to construct Ti 3+ -TiO x /CdIn 2 S 4 (TiCIS) heterojunction by an in-situ self-assembly strategy, which had a hollow structure, strong visible light absorption, high separation rate of carriers, and more active sites. During the degradation experiment of Rhodamine B (RhB), TiCIS25 exhibited the best photocatalytic performance, and 98.0% of RhB was degraded within 60 min of visible irradiation. The intermediates in the RhB degradation and their ecotoxicity were analyzed, which revealed that RhB degradation was a detoxification process. The radical trapping experiments and electron spin resonance (ESR) tests indicated that e - , 1 O 2 , and ·O 2 - are the main active species for RhB degradation. Moreover, a possible photocatalytic mechanism was proposed based on electrochemical tests. The photodegradation performance of the as-prepared TiCIS catalyst under different reaction parameters (authentic water matrices, initial pH, coexisting anions, organic matter concentration, actual sunlight, reaction temperature, and multiple pollutants) and circulating experiments, as well as the photo-reduction process CO 2 , reflected that TiCIS25 possessed excellent practicability, cyclic stability, and universal applicability. Above all, TiCIS25 exhibited great potential in photocatalytic processes, and the work provided a feasible strategy for designing high-performance photocatalysts .
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高影响因子
Journal of CO2 Utilization
·
2021
·
IF 7.132
Yue Zhang,Lin Liu,Wei-Guo Xu,Zheng-Bo Han
A bifunctional MOF@POP core-shell catalyst (NH 2 -UiO-66(Hf)@CoTPy-CAP) constructed by amino functionalized NH 2 -UiO-66(Hf) and ionic porphyrin-based CoTPy-CAP was first reported to be applied in the cycloaddition of CO 2 . Because NH 2 -UiO-66(Hf)@CoTPy-CAP both possess abundant Lewis acidic sites and nucleophilic centers in one system, the catalyst can efficiently catalyze CO 2 fixation with epoxides without homogeneous cocalyst under mild conditions, achieving propylene oxide (PO) conversion of 98 % at 80 °C and 0.5 MPa. Furthermore, the bifunctional synergetic catalyst was easy to be recovered and recycled for five runs, and the reduction of activity was not obvious. This present work provides a viable direction for the fabrication of bifunctional synergetic catalysts for high-efficient CO 2 fixation without cocatalyst under mild conditions.
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Journal of Cleaner Production
·
2021
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IF 9.297
Wuming Xie,Zijun Huang,Fengping Zhou,Yuhui Li,Xiaolin Bi,Qiushi Bian,Shuiyu Sun
The presence of the antibiotics in wastewater and drinking water is causing increasing concern around the world, thereby an advanced sustainable technology needs to be developed to remove the antibiotics from water resources. In this study, Metal-organic frameworks (MOFs) derived zero-valent iron embedded in the carbon matrix structure named FMC is prepared by a direct pyrolysis of Fe-based metal organic framework. FMC is used as a heterogeneous Fenton-like catalyst to degrade amoxicillin (AMX) based on the oxidation and degradation reactions. FMC had the strengthened catalytic performance for amoxicillin elimination with high mineralization efficiency (60.41%), which was evaluated over various experimental conditions. The role of reaction in FMC/H 2 O 2 system was identified, suggesting amoxicillin was eliminated by the attack of hydroxyls radicals (·OH). The carbon structures can facilitate the passage of electrons and boost the contact of zero valent iron and Fe 2+ species on FMC surface with H 2 O 2 , resulting in the accelerated production of ·OH and high removal efficiency of amoxicillin. By defining reactive oxidizing species and degradation intermediates, the plausible degradation pathways of amoxicillin have been inferred. This study revealed that FMC/H 2 O 2 system has high AMX degradation efficiency and decent recyclability .
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CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 42
·10966-10972
·
IF 5.236
Lanqing Li,Wei Gao,Min Lei,Dan Wen
Graphical A simple ex situ wet chemical transformation method of alkali treatment was proposed to prepare Ni(OH) 2 nanostructured flowers with large specific surface areas from Ni-MOF-74. The relationship between concentration of alkali and the structure properties of corresponding Ni(OH) 2 was uncovered. As the results, the catalyst of Ni(OH) 2 -0.25 performed remarkably catalytic properties with lower potential, higher current density and excellent durability towards MOR among various samples. Post treatment of metal-organic frameworks (MOFs) is widely employed to develop efficient electrocatalysts with better catalytic properties. But the complex processes of post treatment generally led to the collapse of the original structures of MOFs, making the preservation of their pristine hierarchical porous structure a great challenge. Herein, we propose the strategy of alkali treatment of Ni-MOF to transform it into Ni(OH) 2 with similar morphology and enhanced electrocatalytic properties for methanol oxidation reaction (MOR). The structure and electrocatalytic properties of as-obtained Ni(OH) 2 nanostructured flowers were seriously depended on the alkali concentrations. As the result, Ni(OH) 2 obtained from Ni-MOF treated by 0.25 M NaOH (noted as Ni(OH) 2 -0.25) performs 1.5 and 2.5 times larger current density than those of Ni(OH) 2 -0.025 and Ni(OH) 2 -0.5 for MOR. Moreover, the electrocatalytic process and mechanism of MOR on the catalyst of Ni(OH) 2 -0.25 are also revealed. Hence, this ex situ conversion strategy of alkali treatment for Ni-MOF uncovered the transformation of MOFs in alkaline solution and develops robust electrocatalyst for practical application of methanol fuel cells.
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
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IF 5.909
Wei Liu,Shao-Qing Li,Wei-Xing Liu,Qiang Zhang,Jia Shao,Jin-Lei Tian
A convenient and rational route is designed to synthesize B, N co-doped porous carbon materials (BNPCs) via a two-step calcination method derived from adenine-based bio-MOF-1. By using the adenine from bio-MOF-1 precursor as the endogenous N source and boric acid as the exogenous B source, the N and B elements are uniformly doped in metal-free BNPCs. B has lower electronegativity than C, leading to a higher positive charge density and the enhanced activation of C atoms. Owing to the synergistic effect between B and N, the co-doped catalysts not only increase electrical conductivity of catalysts to improve electron transfer , but also produce more additional active sites to intensify the catalytic performance for the reduction of 4-NP. The as-synthesized carbon materials have abundant mesopores , graphite structure, dual heteroatoms doping and thus excellent catalytic performances. In particular, BNPC-1000, obtained by pyrolysis at 1000 °C, shows superior catalytic efficiency of 95.2% and high catalytic cycling stability for the 4-NP reduction.
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Catalysts
·
2021
·Vol. 11
·期 10
·1186
·
IF 4.146
Yarui Wang,Wanchao Yu,Fanglan Geng,Lixia Zhao,Yawei Wang
The coexistence of pollutants presents a great challenge to the implementation of photocatalysts. In this work, a novel MIL-101(Fe)/TiO2composite prepared by in situ growth of MIL-101(Fe) on TiO2was developed for the synergetic oxidation of MC-LR and Cr(VI) reduction. The heterojunction material shows elevated photocatalytic behavior under ultraviolet compared with the unary pollutant system. Furthermore, quenching experiments and electron spin resonance confirm that the enhanced photodegradation behavior is related to the synergistic effect between the photocatalytic reduction and oxidation process, in which MC-LR consumes the holes and Cr(VI) captures electrons, followed by efficient charge separation through the conventional double-transfer mechanism between MIL-101(Fe) and TiO2. This investigation provides a deeper understanding of the construction of MOFs/semiconductor heterojunctions for the pollutants removal in multi-component contaminants system.Keywords:TiO2@MOF photocatalyst;Cr(VI);microcystin-LR;synergetic removal
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Xiaowu Liang,Pengfei Wang,Congli Li,Min Yuan,Qi Shi,Jinxiang Dong
CO is an important raw material and the separation of CO/N 2 in blast furnace gas can supply an abundant source of CO. Metal organic frameworks (MOFs) containing open metal sites are capable of selectively binding to CO over N 2 . However, the open metal sites easily bind to guest molecules during the preparation and activation process. In this study, typical MOFs containing open metal sites (Co-MOF-74) were used to investigate the activation behavior and corresponding CO/N 2 adsorptive separation performance. To characterize the removal and decomposition of guest molecules, TG-MS and NMR analysis of MOF-74 prepared under different activation conditions were performed. During the heat and vacuum process, the guest H 2 O and methanol (MeOH) molecules in Co-MOF-74 were first removed at 150 °C under vacuum. The aim of high temperature activation at 300 °C is the decomposition of a small amount of bind N,N-dimethylformamide (DMF) and terminal ligands occupying the open metal sites in Co-MOF-74. In addition, H 2 O molecules occupy the open metal sites of Co-MOF-74 during the filtration and MeOH wash steps under air, which is accompanied by the removal of a portion of DMF. The CO adsorption (298 K and 1 bar) and the CO/N 2 selectivity (Ideal adsorbed solution theory: 50:50, v/v) of Co-MOF-74 activated at 300 °C was 6.07 mmol/g and 384, respectively, which was higher than that of the other activated Co-MOF-74 samples and was attributed to the effective removal of guest molecules. Our results may guide the activation of MOFs, which contain open metal sites.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Kuan-Neng Chi,Yan Guan,Xi Zhang,Tong Yang,Shuang Meng,Rong Hu,Yun-Hui Yang
The analytical methods based on colorimetric detection of various analytes have attracted intensive interest. However, most of them display relatively low sensitivity. Herein, a novel colorimetric strategy based on iodide/metal-organic frameworks (MOF)-mediated amplification was developed for low-cost, naked-eye detection and quantification of H 2 O 2 ,Cr 2 O 7 2− , and H 2 S. Cu-MOFs could catalyze the oxidation of the colorless peroxidase substrate TMB to produce a blue product. The published researches mainly focused on the immobilization or integration of a macromolecule , such as natural enzymes , to enhance MOFs catalytic abilities. The use of small molecules to improve the catalytic performance of MOFs has rarely reported. Due to the negligible steric hindrance , iodide could easily be adsorbed in the framework pore of MOFs to conduct the synergic catalytic effect, and shows a high catalytic effect. As a result, the catalytic activity of Cu-MOFs was dramatically enhanced, and thus, the nanocatalyst could act as an amplifier system for target detection. The detection limits obtained by the amplified method are 25, 30, and 0.2 nM, respectively, which are about 200-fold lower than that of the unamplified colorimetric assays . The colorimetric strategy developed herein provides a novel system for the detection of low concentrations of analytes in complex biological samples.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 3
·51493
·
IF 3.125
Haibo Ouyang,Man Zhou,Jie Fei,Xiao Duan,Tian Liu,Bei Zhao,Jian Feng Huang
The metal organic frameworks (MOF-5) with nanoscale porosity and organic–inorganic heterocyclic structure were chemically grafted onto carbon fibers by solvothermal for forming high mechanical interlocking composite architectures and releasing the interfacial forces, so as to obtain carbon fiber reinforced composite with excellent mechanical and tribological properties. With the multi-scale enhancement of MOF-5, the optimized tensile and bending strength of the composite increased by about 177.9% and 81.3%, respectively. Moreover, the friction coefficient was higher and relatively stable under the continuous wet friction condition, as well as the wear rate was reduced by 44.4%. The work suggests that the application of MOFs can be extended to the field of structural composites.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Liwei Qian,Wenqian Liu,Hanbin Liu,Valentin Nica,Sufeng Zhang,Qiusheng Zhou,Wenqi Song,Qiuyu Zhang
The development of high-performance protein-imprinted materials is vital to meet the requirements of proteomics research but remains a challenge. Herein, a new type of raspberry-like cytochrome C-imprinted nanoparticle was first designed and fabricated via surface imprinting technology combined with a template immobilization strategy. In particular, the state-of-the-art metal–organic framework (MOF)/carbon nanoparticle (CN) composites were selected as protein immobilization carriers for two advantages: (1) the composites reflected the intrinsic characteristics of MOFs including flexible design, facile preparation, and extensive interactions with proteins and (2) the utilization of composites also overcame the issue associated with the severe agglomeration of individual MOFs during the post-use process. Therefore, the as-prepared composites exhibited a regular raspberry-like shape with good dispersion (polydispersity index (PDI) < 0.25), high specific surface area (551.4 m2 g–1), and outstanding cytochrome C immobilization capacity (900 mg g–1). Furthermore, a zwitterionic monomer was chosen to participate in the synthesis of an imprinting layer to reduce the nonspecific binding with proteins. As a result, the unique design presented here in both the protein immobilization carrier and the selected polymer composition endowed the imprinted material (noted as CN@UIO-66@MIPs) with the excellent ability for cytochrome C enrichment with extremely high recognition ability (imprinting factor (IF) = 6.1), rapid adsorption equilibrium time (40 min), and large adsorption capacity (815 mg g–1). Furthermore, encouraged by the experimental results, we successfully used CN@UIO-66@MIPs to specifically capture cytochrome C in mixed protein solutions and biological samples, which proved them to be a potential candidate for protein separation and purification.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Ziyi Xiao,Junsheng Zhou,Lu Fan,Yu Li,Yuting He,Yingxi Wang,Ling Li
A composite paper was designed in order to remove dyes and heavy metal ions in wastewater, which was prepared by assembling NH2-Cu-BDC layer by layer on the surface of the carboxymethyl-modified filter paper (CMFP). The prepared composite paper (Cu-MOFs/CMFP) shows the ability to capture dyes and metal ions, and the dye and metal solution can be separated by simple filtration on the MOF paper at the same time. The application of 30-layer Cu-MOFs/CMFP in the removal of pollutants in simulated wastewater was discussed, and it was found that Cu-MOFs/CMFP can simultaneously remove dyes and heavy metal ions with removal rates close to 90%. In addition, Cu-MOFs/CMFP can be reused after a simple washing process and maintains prosperous dye capture ability. The successful development of this technique provides a new strategy to design new materials for the removal of organic dyes and heavy metal ions in wastewater.
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