RSC Advances
·
2018
·Vol. 8
·期 38
·21460-21471
·
IF 2.936
Zhongzheng Zhang,Nannan Sun,Wei Wei,Yuhan Sun
A new strategy for controlled synthesis of a MOF composite with a core–shell structure, ZIF-8@resorcinol–urea–formaldehyde resin (ZIF@RUF), is reported for the first time through in situ growth of RUF on the surface of ZIF-8 nanoparticles via an organic–organic self-assembly process by using hexamethylenetetramine as a formaldehyde-releasing source to effectively control the formation rate of RUF, providing the best opportunity for RUF to selectively grow around the nucleation seeds ZIF-8. Compared with the widely reported method for MOF composite synthesis, our strategy not only avoids the difficulty of incorporating MOF crystals into small pore sized materials because of pore limitation, but also effectively guarantees the formation of a MOF composite with a MOF as the core. After carbonization, a morphology-retaining N-doped hierarchical porous carbon characterized by its highly developed microporosity in conjunction with ordered mesoporosity was obtained. Thanks to this unique microporous core–mesoporous shell structure and significantly enhanced porosity, simultaneous improvements of CO2 adsorption capacity and kinetics were achieved. This strategy not only paves a way to the design of other core–shell structured MOF composites, but also provides a promising method to prepare capacity- and kinetics-increased carbon materials for CO2 capture.
研究领域:
材料化学
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环境科学
·
纳米材料
·
多孔材料
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碳捕集
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物理化学
·
功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yinling Wang,Juan Wang,Dandan Wei,Maoguo Li
M–N–C electrocatalysts for the oxygen reduction reaction (ORR) have been considered as the most promising alternatives to precious metal catalysts. However, the catalytic activity of M–N–C especially in an acidic medium is still unable to meet the practical requirement, and the corresponding ORR mechanism also remains unclear. Herein, an “MOF-protective-pyrolysis” strategy was adopted to synthesize an Fe–N–C catalyst (P-FeMOF@ZIF-8) with Fe–N4 as the predominant Fe species. The P-FeMOF@ZIF-8 displays high catalytic activity in both acidic and alkaline mediums. The experimental results further reveal the different importance of the Fe species in different mediums. Based on the results, a distinct mechanism of the ORR the in acidic medium was proposed, where the synergistic effect of the Fe–N4 site and carbon in improving the kinetics of the ORR were well explained. The findings and the corresponding perspective may provide a new guidance for the design of highly efficient ORR electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Heng Mao,Hong-Gang Zhen,Ali Ahmad,Ao-Shuai Zhang,Zhi-Ping Zhao
Biofuels separation using membranes becomes one of the research focuses in the field of renewable energy. In this study, a series of mixed matrix membranes (MMMs) with defect-free active layer around 1 µm thickness were elaborately prepared through interfacial synthesis for ethanol permselective pervaporation . Polydimethylsiloxane (PDMS) was employed as polymer matrix , which adjusted the nucleation of MOF precursors to in situ generate ZIF-8 nanoparticles . Within the active layer, the resultant ZIF-8 nanoparticles provided the preferential pathways for ethanol due to their ultrahigh adsorption capacity and super-hydrophobicity. Moderate aggregation could form the relatively continuous diffusion pathways. This approach rendered the uniform dispersion of ZIF-8 nanoparticles within PDMS matrix and their excellent compatibility. The ZIF-8 nanoparticles endowed the membranes with enhanced ethanol affinity, hydrophobic property, and thermal stability. More importantly, the ZIF-8 nanoparticles substantially reduced the permeation energy barriers of the membrane for penetrants. The membranes displayed the simultaneous increase in permeation flux and separation factor when utilized for ethanol recovery from aqueous solution, revealing the desirable anti-tradeoff effect. Particularly, the resultant membrane exhibited a superior pervaporation performance with relatively high permeation flux (1778 g · m -2 · h -1 ) and comparable separation factor (12.1) in separating 5.0 wt% ethanol aqueous solution at 40 °C.
研究领域:
可再生能源
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Linjing Duan,Huali Jin,Yang Wen,Min Wei,Rui Guo,Zhiguang Suo,Keshavan Niranjan
As a food and environmental contaminant having harmful qualities like neurotoxicity and carcinogenicity, acrylamide (AA) is a risk to human health. In this study, Ce-MOF@AuPd NFs were utilized as electrode modification materials to develop a signal-off electrochemical aptasensor in combination with Mg 2 + -dependent DNAzyme-driven 3D DNA walker and triplex molecular switch (THMS) for the sensitive detection of AA. Ce-MOF@AuPd NFs exhibit an expansive surface area and enhanced conductive properties, enabling the binding of substantial DNA sequences and speeding up electron transfer. The Mg 2+ -dependent DNAzyme-driven 3D DNA walker improves the nucleic acid shearing efficiency with excellent signal amplification performance, and combines with the DNA-specific structure THMS to further boost sensor sensitivity. The sensor also demonstrated excellent specificity, reproducibility, repeatability, and stability, along with achieving satisfactory recovery rates when tested on potato chips and coffee samples. The electrochemical aptasensor offers strong application prospects for AA detection in food, according to the results.
研究领域:
生物传感技术
·
食品安全检测
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Haiyang Wang,Lin Cai,Yuwei Wang,Chang Liu,Guozhen Fang,Shuo Wang
A molecularly imprinted electrochemical sensor (MIES) modified with Cu-MOF and Ti 3 C 2 Tx was successfully prepared for the detection of hygromycin B in food. According to the pH sensitive property of reversible borate ester bonds, a molecularly imprinted polymers (MIP) were constructed on the modified gold electrode (GE) surface by electropolymerization to realize the controllable elution and adsorption of template molecules. Cu-MOF with large specific surface area and Ti 3 C 2 Tx with excellent electrical conductivity cooperate to improve the overall analytical performance of MIES. The morphology and electrochemical performance of the sensor were evaluated. Under the optimal experimental conditions, the method showed superior selectivity to hygromycin B with a linear range of 5 × 10 −9 –5 × 10 −6 M and a detection limit of 1.92 × 10 −9 M (S/N = 3). The detection results of this method are in good agreement with HPLC-MS/MS, which proves that the method has reliable practicability and accuracy.
研究领域:
食品科学
·
分析化学
·
生物传感技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yushan Cao,Chuan Cao,Zhirong Sun,Xiang Hu
Calcination temperature affects the formation of metal species. By calcining nitrogen-doped Fe/Mo bimetallic MOF at a higher temperature (700 °C), a core-shell structure MOF-derived carbon material (FeMo@NPC-700) containing transition metal nitride (TMN) was successfully prepared and used as a cathode for the degradation of tetracycline (TC) in the electro-Fenton system. Due to the high catalytic activity of TMN and the synergistic catalytic effect of Mo, the FeMo@NPC-700 cathode achieved 98.9% removal of TC within 30 min and 51% removal of total organic carbon (TOC) within 60 min. It was verified that Fe 3 N played an important role in the degradation of TC, contributing 68% to the degradation. In addition, quantitative analysis of the reactive oxygen species (ROSs) in the system showed that ·OH was the main ROS dominating the degradation of tetracycline. Finally, four possible pathways of TC degradation were proposed based on HPLC-MS analysis, and the toxicity of the intermediates was analyzed by ecological active-structure relationship. This study provides a reference for the preparation of MOF-derived carbon materials containing TMN.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Shiyin Zhao,Yangke Long,Xuehua Shen,Shubin Wang,Yiping Su,Xuanjun Zhang,Zuotai Zhang
Peroxymonosulfate (PMS)-based Fenton-like reactions are widely used for wastewater remediation. Metal-free carbonaceous activators can avoid the secondary pollution caused by metal leaching but often suffer from insufficient activity due to limited active centers and mass transfer barriers. Here, we prepared a series of heteroatom (N, S, F)-doped, highly porous carbonaceous materials (UC- X , X = N, S, F) by pyrolyzing UiO-66 precursors assembled by various organic ligands. Density functional theory calculations showed that the heteroatoms modulated the electronic structures of the carbon plane. UC- X exhibited significantly enhanced PMS activation capability compared with the undoped counterpart, in the efficiency order of UC-N > UC-S > UC-F > UC. UC-N (calcined at 1000°C) showed the best PMS activation, exceeding that of commonly used carbocatalysts. The prominent performance of UC-N originated from its unique porous structure and homogeneously dispersed graphitic N moieties. Trapping experiments and electron spin resonance showed a nonradical degradation pathway in the UC-N/PMS system, through which organics were oxidized by donating electrons to UC-N/PMS* metastable complexes. This work not only reports a universal way to access high-performance, metal-free PMS activators but also provides insight into the underlying mechanism of the carbon-activated PMS process.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Xiao Lian,Yu Zhang,Jinmin Wang,Bing Yan
A sandwiched mixed matrix membrane (MMM) based on a metal–organic framework–hydrogel hybrid exhibits eximious performance in the detection of mitoxantrone. Parts per billion-level sensitivity and good selectivity in serum among other analogous antineoplastics have been achieved. This flexible MMM can be used for point-of-care testing drugs in a biological medium.
研究领域:
分析化学
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材料科学
·
生物传感技术
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药物分析
·
纳米技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Qianqian Chen,Yuancai Lv,Junjie Pan,Weihan Chen,Gengwu Zhou,Xiaobing Yang,Kejun Cheng
Antibiotics, particularly tetracycline (TC), are extensively used in medicine, agriculture, animal husbandry, and the food industry due to their bacteriostatic and antibacterial properties. However, the widespread use of antibiotics has led to serious consequences, particularly in the form of water pollution and the emergence of numerous antibiotic-resistant microorganisms. Therefore, it is essential to implement effective measures to mitigate these environmental impacts. In this paper, we introduce a novel BiOCl@Bi-carbon heterojunction derived from Bi-MOF. The synthesized samples were thoroughly characterized through various techniques. The results demonstrate that BiOCl was successfully synthesized on the surface of Bi-MOF via in situ transformation, and that Bi-MOF was converted into Bi-doped porous carbon (Bi-carbon) after high-temperature annealing treatment. The coupling of BiOCl with Bi-carbon significantly enhances the photocurrent density. The photocatalytic activity of the samples was effectively evaluated by measuring the degradation of TC, with BiOCl@Bi-carbon demonstrating the highest photocatalytic efficiency, achieving a degradation rate of 96.27 % for TC. Additionally, BiOCl@Bi-carbon exhibits excellent stability. Its outstanding photocatalytic performance indicates significant potential for practical applications. Furthermore, we analyze the mechanism underlying the photocatalytic degradation of TC at the end of the study.
研究领域:
环境科学
·
材料科学
·
化学
·
光催化
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Ming Yin,Li Zhang,Xiuxia Wei,Yiwei Sun,Shuyan Qi,Yan Chen,Xinxin Tian,Jingxuan Qiu,Dongpo Xu
This work is carried out by the synergy of Co/Ni-Bio-MOF and noble metal Au-doped coral-like ZrO 2 . A novel electrochemical aptamer sensor (aptasensor) for measuring kanamycin (Kan) was developed by using ZrO 2 @Au as an amplification platform for electrochemical aptasensors. ZrO 2 @Au was strategically used to significantly reduce the Differential Pulse Voltammetry (DPV) response by hindering electron transfer at the working electrode surface. When Kan is recognized by the ZrO 2 @Au-linked aptamer, it is disconnected from the complementary sequence attached to the Co/Ni-Bio-MOF due to the applied force, thereby disengaging from the electrode. This results in the removal of obstacles to electron transfer, enabling signal amplification. This electrochemical sensor exhibits good linearity from 10 μM to 1000 μM. It has a detection limit of 0.037 μM and has excellent stability (RSD = 0.14–0.21%), reproducibility (RSD = 0.079–0.63%) and selectivity.
研究领域:
分析化学
·
电化学
·
生物传感器
·
环境监测
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Lina Jin,Baozhong Li,Xinye Qian,Hexiang Xu
Lithium–sulfur batteries (LSBs) are recognized as promising candidates for next-generation high-energy-density energy storage technologies due to their exceptionally high theoretical energy density (2600 Wh kg–1), low cost, and environmental sustainability. However, several challenges, including the polysulfide(LiPS) shuttle effect, the low conductivity of the sulfur cathode, and lithium dendrite growth, have significantly impeded their practical application. In this research, we developed a hierarchical porous Zn3V2O8 (ZVO) modified separator through the high-temperature calcination of a Zn–V-MOF precursor to effectively mitigate LiPS shuttle effects via a dual mechanism. The porous architecture of ZVO facilitates efficient adsorption and rapid conversion of polysulfides through both physical confinement and catalytic activity arising from vanadium’s multivalent states. Additionally, the nitrogen-doped carbon network enhances electrode conductivity while strengthening polysulfide anchoring. The performance of the ZVO-modified separator reveals an initial discharge capacity of 882.9 mAh g–1 at 0.5C with a sulfur loading of 2.8 mg cm–2, demonstrating retention at 541.2 mAh g–1 after 500 cycles-yielding a capacity retention rate of 61.3%. Notably, under commercially viable conditions (5 mg cm–2 sulfur loading and 0.1C), the battery exhibits stable cycling performance, underscoring the potential applicability of ZVO-based separators in practical high-energy-density LSB systems.
研究领域:
储能技术
·
材料科学
·
电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Haojie Sun,Bo Yu,Xue Pan,Zhicheng Liu
Metal-organic frameworks (MOFs) such as zeolitic imidazolate framework (ZIF) have shown potential in removing various contaminants from water. However, the MOF materials, usually in powder form, suffer from easy aggregation and poor recyclability, limiting their practical applications in water treatments. Here, we have designed leaf-like MOF-decorated electrospun nanofiber membrane as adsorbent to address the problems. More specifically, two dimensional ZIF-L materials were decorated on electrospun polyacrylonitrile nanofibers (NF) using an in-situ growth method. The obtained ZIF-L/NF nanocomposite can efficiently adsorb toxic malachite green and reach a high adsorption capacity of 5103 mg g −1 , attributed to the π-π stacking interactions between the ZIF-L and the dyes. The adsorption process conforms to pseudo-second-order kinetics and Langmuir isotherm model. From thermodynamic analysis, it was found that the adsorption was spontaneous and endothermic. Moreover, the ZIF-L/NF nanocomposite also exhibits excellent recyclability in the adsorption–desorption test.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
DOI
高影响因子
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