MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Ben Niu,Zhenyu Zhai,Shuyan Yu,Tong Li,Jiaona Wang,Yan Zhou,Congju Li
A copper-based metal–organic framework (MOF-199) demonstrates excellent performance and considerable potential in the gas detection of volatile organic compounds (VOCs). However, the powder of MOF-199 seriously limits its application in the fabrication of flexible devices. Herein, we introduce a simple method of blending electrospinning, combining MOF-199 with polyacrylonitrile (PAN) nanofiber to form a MOF-199/PAN nanofiber membrane with the flexibility of PAN nanofiber and the functionality of MOF-199. The capacitive sensor comprising MOF-199/PAN nanofiber membrane and carbon nanotubes exhibits good flexibility, high porosity, and sufficient adsorption active sites. The sensor has the highest response to methanol among seven target VOCs. It exhibits outstanding sensitivity, long-term stability, good linear response, and repeatability toward methanol (250–1250 ppm). Owing to the flexibility of the MOF-199/PAN nanofiber membrane, the sensor maintains a stable sensing response after repeated bending at 180˚–0˚ 50 times and exhibits a certain degree of response in the 180˚ bending state. The results show that the sensor has flexibility potential. These provides some ideas and reference for the development of VOCs sensors.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 12
·4604
·
IF 4.6
Li Zhang,Mengting Zhang,Pingping Yang,Yin Zhang,Junjie Fei,Yixi Xie
Rutin, as a biological flavonoid glycoside, has very important medicinal value. The accurate and rapid detection of rutin is of great significance. Herein, an ultrasensitive electrochemical rutin sensor based on β-cyclodextrin metal–organic framework/reduced graphene oxide (β-CD-Ni-MOF-74/rGO) was constructed. The obtained β-CD-Ni-MOF-74 was characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and nitrogen adsorption and desorption. The β-CD-Ni-MOF-74/rGO presented good electrochemical properties benefiting from the large specific surface area and good adsorption enrichment effect of β-CD-Ni-MOF-74 and the good conductivity of rGO. Under optimal conditions for the detection of rutin, the β-CD-Ni-MOF-74/rGO/GCE showed a wider linear range (0.06–1.0 μM) and lower detection limit (LOD, 0.68 nM, (S/N = 3)). Furthermore, the sensor shows good accuracy and stability for the detection of rutin in actual samples.Keywords:electroanalysis;carbon materials;electrochemical reduction;modified electrode
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Qiulin Li,Xiang Li,Ke Zhang,Jiaqi He,Yongbing Lou,Jinxi Chen
There is an urgent need to design effective and affordable noble metal-free oxygen evolution electrocatalysts for the realization of hydrogen production technology through overall water splitting. In this work, we synthesized CoMoO 4 /Fe-MOF composite catalysts on nickel foam by solvothermal method and explored them as electrodes towards oxygen evolution reaction. At 10 mA cm −2 , CoMoO 4 /Fe-MOF demonstrated a small overpotential of 238 mV, with a relatively small Tafel slope of 49.22 mV dec -1 and exhibited excellent stability after 30 h of testing. The enhanced OER activity and good durability of CoMoO 4 /Fe-MOF could be attributed to the self-supported growth of Fe-MOF nanosheets as well as the tight binding to the rod-like CoMoO 4 . The coupling of CoMoO 4 with Fe-MOF established a rich boundary, thus improving conductivity, increasing specific surface area and exposing more active sites. These results suggested that the combination of MOFs with binary transition metal oxides provided an effective route to develop robust and efficient electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qinqin He,Hongjun Zhao,Zedong Teng,Yin Wang,Weiling Sun,Yali Guo,Xiaonan Ji,Wei Hu,Su Shiung Lam,Min Li
Phosphorus (P) is known as a valuable resource, and recycling it from wastewater can avoid environmental pollution and resource waste. Herein, a regenerable magnetic Fe 3 O 4 and La-based metal–organic framework functional material (Fe 3 O 4 /La-MOF) was synthesized by solvent thermal method and its adsorption performances of phosphate were evaluated. The as-prepared magnetic Fe 3 O 4 /La-MOF exhibited magnetic separation efficiency of 97.9% and it could maintain the high adsorption capacity over a wide pH range from 3 to 10, as well as showed an excellent P adsorption selectivity in presence of Cl - , NO 3 – , HCO 3 – , CO 3 2– and SO 4 2- . The isotherm data were consistent with the Langmuir model, and the adsorption kinetic data conformed to the pseudo-second-order model, revealing that there was chemical adsorption between Fe 3 O 4 /La-MOF and phosphate. The electrochemical behavior of Fe 3 O 4 /La-MOF before and after phosphate adsorption showed that the band gap energy of LUMO (Lowest Unoccupied Molecular Orbital) and HOMO (Highest Occupied Molecular Orbital) of P adsorbed Fe 3 O 4 /La-MOF was lower than that of the material itself, which indicated the successful adsorption of phosphate on Fe 3 O 4 /La-MOF and the forming of a perfect hybrid structure. The characterization analysis of FT-IR and XPS illustrated that intra-sphere complex (La O P) formed between Fe 3 O 4 /La-MOF and phosphate by ligand exchange, which might be the dominant mechanism, followed by electrostatic attraction and precipitation. This study highlighted the great promise of magnetic reusable Fe 3 O 4 /La-MOF composite for application in phosphate removal and recovery.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yingnan Hua,Bing Chen,Tao Feng,Youyi Lei,Li Yang,Jiwen Feng,Gang Liu
Nowadays, metal-organic frameworks (MOFs) are regarded as promising anode materials for lithium-ion batteries (LIBs) due to their high porosity, tunable structure, and considerable surface area. However, limited by low conductivity and poor cycling stability, few MOF-based anodes can achieve stable cycling performance at high current densities for practical applications. Herein, we report the preparation of a unique interlocked smoothie-like anode material, named HA-Co-BPDC, for lithium-ion batteries through a facile two-step hydrothermal method. The as-prepared HA-Co-BPDC anode exhibits outstanding reversible capacity of 1603 mAh g −1 at 0.1 A g −1 and remains 971 mAh g −1 at 1 A g −1 , exhibiting good rate capability. Most importantly, the HA-Co-BPDC anode shows excellent long-term cycling stability at ultra-high current density, due to the unique interlocked structure which endows high tolerance toward the volume expansion/contraction. Typically, specific capacities of 315 and 242 mAh g −1 are obtained after 1000 cycles at 5 and 10 A g −1 , which delivers high capacity retention of 84% and 80%, respectively. Possessing outstanding reversible capacity, good rate capability, and excellent long-term cycling stability at ultra-high current density, the HA-Co-BPDC exhibits great potential in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xue-Chun Yang,Sha-Qi Fu,Qian-Li Li,Zheng Jiao,Jing-Tai Zhao,Yun Guo,Zhi-Jun Zhang,Song Gao,Ling-Li Cheng
Multimode sensors are required to enable detect of hazardous substances in different media. A sensing platform based on metal organic frameworks (MOF) and its derivatives was established to detect triethylamine (TEA) gas and TEA aqueous solution in the range of 1–100 ppm. The carbon dots (CDs) were selected as the light-energy conversion module to improve greatly the photoelectric performance of sensors. On the one hand, the dual-emission ratio type fluorescent sensor was built by CDs and MOF. The CDs@ZIF-8(In) showed excellent fluorescence emission enhancement at 440 nm and 610 nm in a dose-dependent manner when TEA was added. The change of fluorescence emission intensity of CDs@ZIF-8(In) sensor for TEA in water was at least 3 times than that of other volatile organic compounds, and its detection limit reached 1 ppm. On the other hand, the gas sensor based on MOF derivatives modified by CDs (CDs@D ZIF-8(In) ) displayed 3.5 times signal response than pure D ZIF-8(In) , reaching 374.6 to 100 ppm TEA. Moreover, the optimal operating temperature of CDs@D ZIF-8(In) sensor was 40 ℃ lower than that of D ZIF-8(In) sensor. The excellent fluorescence and electron transfer properties of CDs may play a key role in the design and modification of various types of sensors.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Shanshan Zhang,Dongliang Liu
As conventional water purification technologies are inefficient, they put us at risk of exposure to emerging micropollutants. Here, we report a two-step method for rapid construction of a stable enzyme@MOF biomimetic membrane comprising enzyme-embedded metal–organic framework-based biocomposites for continuous and efficient removal of micropollutants from water. We first prepared a horseradish peroxidase@zeolitic imidazolate framework-8 (HRP@ZIF-8) biocomposite via ball-milling method, capable of preserving structural integrity and the entrapped enzyme bioactivity under different denaturing environments. The second step involves biocomposite membrane synthesis via stimulation of polydopamine (PDA) polymerization with UV light after successively dispersing the dopamine and HRP@ZIF-8 biocomposite molecules in a neutral pH Tris-HCl system. Accompanied by the clever codeposition with PDA, the HRP@ZIF-8 biocomposite can be “sandwiched” between the PDA layers to create a stable HRP@ZIF-8-composite membrane (HRP@ZIF-8-CM). HRP@ZIF-8-CM synergistically integrates MOF adsorption, enzyme catalysis, and membrane separation functions. The calculated encapsulation rate of the HRP@ZIF-8 biocomposite is ≤ 98.2 %. The enzyme@MOF composite membrane has a catalytic degradation efficiency of 98 % for bisphenol A (1 mg/L), membrane water flux of 32.3 L/m 2 h bar, outstanding stability, and high efficiency after 7 cycles of use. Surprisingly, the bisphenol A removal rate of the enzyme@MOF composite membrane remained stable under varying denaturing conditions, including wide pH and temperature ranges and proteolytic enzymes, indicating that HRP enzyme activity is well preserved, probably owing to the bio-inertness of ZIF-8. In conclusion, we propose a new, simple, and fast method for the constructing enzyme@MOF composite membranes, which can significantly improve water purification.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Chan Li,Sheng Zhou,Chuncheng Chen,Lijun Zhu,Shijie Li,Zhuoyue Song,Jian Liang,Chunzhi Tang,Nenggui Xu,Tao Liu,Shihui Liu
Disulfiram (DSF), a drug for alcohol withdrawal , has attracted extensive scientific attention due to its potential to treat cancer. The metabolite of DSF, diethyl dithiocarbamate (DDTC), forms a Cu-DDTC complex in vivo with copper ions , which has been shown to be a proteasome inhibitor with high antitumor activity . However, the in vivo stability of Cu-DDTC complexes remains a challenge. In this study, the nanomedicine [email protected] with high antitumor activity was prepared by using the nanoscale metal-organic framework (MOF) Cu-BTC as a carrier and loading diethyldithiocarbamate (DDTC) through coordination interaction. The results showed that [email protected] had high drug loading and adequate stability, and exhibited DDTC-Cu(I) chemical valence characteristics and polycrystalline structure features. In vitro cytocompatibility investigation and animal xenograft tumor model evaluation demonstrated the anti-cancer potential of [email protected] , especially the combination of [email protected] with low-dose cisplatin showed significant antitumor effect and biosafety. This study provides a feasible protocol for developing antitumor drugs based on the drug repurposing strategy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhiguo Zhang,Hua Huo,Jinlong Gao,Zhenjiang Yu,Feitian Ran,Lei Guo,Shuaifeng Lou,Tiansheng Mu,Xucai Yin,Qun Wang,Geping Yin
In this paper, NiO nanoparticles uniformly embedded in spherical carbon matix in situ grown on reduced graphene oxide (rGO) has been successfully fabricated via a simple pyrolysis of nickel metal organic framework (MOF) precursor self-assembled on graphene oxide. This interaction between the carbon and the NiO can significantly maximize the surface of NiO for pseudocapacitance, provide effective electronical transmission path and improve the ionic absorbability and conductivity. As a result, the NiO/C/rGO hybrid electrode demonstrates high specific capacity (496 C g −1 at current density of 1 A g −1 ) and good cycling stability. Moreover, a hybrid supercapacitor assembled by NiO/C/rGO and a hierarchical porous carbon derived from sodium citrate can deliver a high energy density of 35.9 Wh kg −1 at a power density of 749.1 W kg −1 , and extraordinary cycling stability (120% retention after 3000 cycles). It has been demonstrated that the carbon matrix derived from the linker molecules in Ni-MOF, which maintains close contact with both the size-controlled NiO nanocrystals and the electronic conductive rGO, is vital to synergize the electric double layer capacitance from the carbon materials and the battety-type behavior from NiO for high-performance energy storage.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Ting Li,Shuai Ma,Hu Yang,Zhen-liang Xu
Metal organic frameworks (MOFs) containing salt impurity provide a new idea for carbon material design. Presently, Mg–MOF/MgCl2 hybrid polycrystallines with different morphologies are solvothermally synthesized using 1,3,5-benzenetricarboxylic acid (BTC) or 1,4-benzenedicarboxylic acid (BDC) as the ligand, with or without polyethylene terephthalate (PET) inducer, respectively. After calcination, the products look like a flower, bud, cube, or nanosheet. When tested as adsorbent, the maximum methyl orange adsorption capacity reaches 3250 mg/g, the highest reported to date. The reason is attributed to the carbon-covered Mg salt inside the carbonized MOF. When tested as supercapacitor, carbonized MOFs based on BTC ligand show a high specific capacitance (127F/g) but a low rate capability, whereas a lower specific capacitance (121F/g) but a better rate capability (80% retention at 10A/g) are found for carbonized MOFs based on BDC. The reason is due to their different pore structures.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 5
·1476-1484
·
IF 1.637
Huang Chengjie,Ye Yunxi,Zhao Liwei,Li Yongsheng,Gu Jinlou
Given to the severely toxic effect on aquatic organisms and serious carcinogen to human being of nitrite, the development of a convenient and sensitive method for its detection is of greatly significance. Herein, a novel Rh110@MOF-801 fluorescent probe was synthesized in a one-pot strategy and was successfully used in the determination of nitrite. This strategy, taking full advantages of fluorescent rhodamine 110 (Rh110) molecules and porous MOFs, could not only overcome the shortcomings of hydrophobicity of dye molecules and preserve its fluorescent properties perfectly, but also facilitate the interaction between nitrite and fluorescent recognition sites thanks to the open structure and good stability of porous MOFs. The results showed that the fluorescence quenching level of Rh110@MOF-801 fluorescent probe was linear with the applied nitrite concentration in the range of 2–7 µM with a limit of detection of 0.2 µM. Furthermore, the well-designed fluorescence probe could specifically recognize nitrite and would hardly be affected by other possibly coexistent interfering substances. It has been successfully used in quantitative detection of nitrite content in water samples mixed with interfering ions, prefiguring its great application potentials for nitrite monitoring. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Yu Cui,Fei Chen,Xue-Bo Yin
A Eu-metal organic framework (Eu-MOF) probe with dual-emission was reported for the ratiometric fluorescence detection of H 2 O 2 and glucose. Because of the special nucleophilic reaction between boric group and H 2 O 2 , Eu 3+ and 5-boronobenzene-1,3-dicarboxylic acid (BBDC) were selected to synthesize the functional MOF probe via a simple one-pot solvothermal method . The Eu-MOF shows dual-emission at 370 and 623 nm with the single excitation at 270 nm due to the energy transfer efficiency change for antenna effect procedure. After addition of H 2 O 2 , the red emission of Eu-MOF weakened and the blue emission enhances immediately under 270 nm irradiation, so the ratiometric fluorescence detection is established. Moreover, the obvious color change for visual measuring of H 2 O 2 and glucose is illustrated to reveal the merit of Eu-MOF probe. The proposed method was demonstrated to be highly sensitive and selective for H 2 O 2 and glucose, with the low detection limits of 0.0335 and 0.0643 μM, respectively. The established boric-acid-functional Eu-MOF sensing platform was proved as the powerful probe for H 2 O 2 and the metabolites involved in H 2 O 2 -generating reaction.
✓ 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）