CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xin Li,Yunzhuo Zhang,Yue Cheng,Xujun Chen,Wenhu Tan
Metal-organic framework (MOF)-derived ZnCo 2 O 4 was synthesized by utilizing the template agent 2-methylimidazole, zinc and cobalt nitrate by an easy solvothermal process followed by annealing for the first time. The porous hierarchical ZnCo 2 O 4 microstructure possesses a microflower structure assembled by 3D nanosheets . The obtained flower-like structure has abundant open spaces between nanosheets , which allows for facile gas diffusion while providing plentiful active sites for gas adsorption . The hierarchical ZnCo 2 O 4 microflower-based sensor exhibits a high response of 32.32 and fast response/recovery rates (2.6/8.8 s) at 200 °C to 100 ppm acetone gas. In addition, the porous hierarchical ZnCo 2 O 4 microflower-based sensor has a detection limit below 50 ppb with a response of 2.51 to acetone gas. The excellent sensing performance of this porous hierarchical structure-based sensor is ascribed to the good gas accessibility of the microflower morphology with a high specific surface area, small particle size and highly porous structure . This work explores an efficient way to synthesize MOF-derived bimetallic oxides with microflower structures assembled by 3D nanosheets for gas sensing applications.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shouxin Zhu,Can Sun,Zijie Fang,Mingli Qin,Zhexiao Zhu,Jingyi Qu,Hui Zheng
Facing the escalating issue of antibiotic pollution and the emergence of bacterial resistance in water ecosystems, photocatalytic technology has been widely studied as one of the efficient methods to remove antibiotics in aquatic ecosystem. Herein, the bimetallic organic framework materials Cu/Zn-BTC were synthesized with varying proportions of copper and zinc as metal joints and 1,3,5-phthalic acid as organic ligands. Subsequently, the zinc elements within the MOF were eliminated through high pyrolysis to obtain carbon materials derived from Cu/Zn-BTC (referred to as 1.3CZC, 1.4CZC, and 1.5CZC based on the copper-to-zinc ratio). Notably, the presence of different valence copper species facilitated to form type II heterojunction within MOF-derived carbon materials, where internal Cu 0 /Cu + species combined with oxygen vacancies to create localized bands that prolonged the lifetime of photogenerated carriers and enhanced photocatalytic activity. X-ray photoelectron spectroscopy, Brunauer-Emmett-Taylor and other characterization methods were used to analyze the difference in structure and performance of different catalysts. 1.4CZC showed excellent performance, upon exposure to visible light for 30 min, the removal rate of tetracycline significantly increased to an impressive 92.4 %, while extending the exposure time to 60 min further improved the removal rate of ciprofloxacin to approximately 82.6 %. It provides a highly efficient antibiotics removal pathway by MOF-derived carbon materials.
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
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Jiangnan Wang,Long Li,Jinli Zhang,Xueqin Li
The chitosan (CS)-grafted UiO-66-NH 2 (U6N) (CSGUN) was synthesized and incorporated into Pebax matrix to fabricate mixed matrix membranes (MMMs) for boosting CO 2 transport. The excellent CO 2 separation performance was exhibited for MMMs due to the following reasons: U6N with the suitable porosity and abundant CO 2 transport carriers can provide a unique “expressway” for CO 2 to boost CO 2 transport through MMMs. The grafting CS in CSGUN can connect Pebax (regular roads) and U6N (expressway), acting as an “on-ramp” between them to enrich CO 2 and guide CO 2 through U6N in an orderly manner. Thus, the constructed “on-ramp” and “expressway” in MMMs can improve CO 2 separation performance. Furthermore, the CS-MOF networks were formed in MMMs through using CS molecular chains to connect U6N for enhancing CO 2 separation performance of MMMs. Therefore, Pebax/CSGUN MMMs exhibited the excellent CO 2 separation performance with the CO 2 permeability of 558 ± 7 Barrer and the CO 2 /CH 4 selectivity of 37.5 ± 0.7. The study indicated that MMMs with CS-MOF bridged networks had great potential for boosting CO 2 transport by combining “expressways” and “on-ramp”.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Mian Wu,Xixue Fu,Jing Li,Wenqian Zhao,Xiaobing Li
Organic solvent nanofiltration (OSN) has become increasingly important in petrochemical and pharmaceutical industries, demanding superior and robust membranes. 2D MOF nanosheets hold great promise in the preparation of OSN membrane. Nevertheless, the fabrication of defect-free 2D MOF membranes with robust mechanical strength is hampered due to the weak interlamellar interactions between MOF nanosheets. Herein, 2D MOF composite membrane for high-performance OSN application is fabricated through the assembly of copper 1,4-benzene dicarboxylate (CuBDC) nanosheets and NH 2 -SWCNTs. Within this composite configuration, NH 2 -SWCNTs can shelter the defects between the adjacent CuBDC nanosheets, rendering CuBDC/CNTs composite membranes precise molecular sieving ability. Meanwhile, the nanochannels created by NH 2 -SWCNTs with low frictional coefficients on the internal surface promote the permeation of organic solvents. Moreover, the multiple interactions between CuBDC and NH 2 -SWCNTs improve the mechanical strength of composite membranes. Accordingly, the composite membranes display excellent rejections of dye molecules on the basis of size-sieving mechanism with superior methanol permeance of 1260 L m −2 h −1 bar −1 , as well as steady congo red rejection at high trans -membrane pressure of 5 bar, demonstrating good pressure resistance of composite membranes. Moreover, the composite membranes exhibit outstanding stability against high-concentration feeds and long-term operation for 50 h, confirming excellent practicality in the purification of dyes from organic solvents. The design approach in this work may inspire the fabrication of other nanosheet-based membranes for high-efficient OSN.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Zeng Liu,Yuanyuan Zeng,Lan Long,Yang Li,Wei Zhou
Metal organic framework (MOF), with light weight, high specific surface area, and tenability had significant electromagnetic wave (EMW) absorption potential. Ultrathin and efficient UiO-66 MOF/CNT composites are successfully prepared using a simple solvothermal method. The high porosity and large specific surface area of the MOF provide multiple pathways for charge transport, significantly enhancing the probability of EMW reflection and scattering. Under the synergistic effect of CNTs, the conductivity loss and polarization relaxation loss of the composites increased, leading to improved impedance matching. With the combined influence of various attenuation mechanisms, the composites exhibit outstanding EMW absorption performance, with a minimum reflection loss of −54.74 dB and an effective absorption bandwidth of 2.94 GHz at a thickness of 2.04 mm. Additionally, the radar cross section of the MOF/CNT composites was reduced by a maximum of 14.8 dB compared to that of a metal plate, demonstrating excellent practical application potential. Therefore, lightweight, ultrathin, and broadband high-efficiency absorption MOF/CNT composites held significant promise for widespread EMW absorption applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Linna Liang,Ye Zhong,Jiamin Chen,Jianguo Zhang,Tonglai Zhang,Zhimin Li
A bimetallic MOF, CoNi(EIM)2(DCA)2 (1), containing an energetic 1-ethylimidazole (EIM) ligand and a hypergolic linker, dicyandiamide (DCA), was synthesized via a facile method. A fascinating three-dimensional reticular architecture was observed by single-crystal X-ray diffraction in this bimetallic MOF, whereas the corresponding monometallic compounds Co(EIM)4(DCA)2 (2) and Ni(EIM)4(DCA)2 (3) were in the mononuclear coordination mode. Uniformly distributed Co and Ni were observed in the bimetallic MOF crystals by SEM-EDS elemental mapping. Bimetallic MOF 1 was thermally stable and insensitive to mechanical stimuli and possessed an excellent energetic density (22.37 kJ·g–1). Using 1 as a hypergolic promoter, the ignition delay time of 1-butyl-3-methylimidazolium dicyanamide (BMIM DCA) was reduced from 53 to 37 ms, better than that of 2 and 3 as promoters, due to the synergistic catalysis of the bimetal. Furthermore, the thermal decomposition mechanisms of BMIM DCA with 1, 2, and 3 were studied by differential scanning calorimetry (DSC). 1 had the best catalytic performance in BMIM DCA thermolysis with a decrease in the decomposition temperature from 314.5 to 308.0 °C and a decrease in the activation energy by 16.3%. All results shed light on the better catalytic effect of the bimetallic MOF on ionic liquid hypergolic ignition than monometallic coordination compounds.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Zhuting Hao,Shizhen Song,Bo Li,Qin-Xiang Jia,Tengfei Zheng,Zhicheng Zhang
The dual-responsive actuator which response to external stimulus with deformation and discoloration simultaneously gained considerable attention for their application such as soft robot . Inspired by the soft MOF (Metal-Organic framework)/polymer solvent driven actuator based on flexible MOF which can expand/contract with the gain and loss of solvent molecules , and also the structural color films with inverted opal structure, a monolayer solvent driven dual-responsive actuator based on MOF/polymer composite, namely MIL-88A/CB(carbon black)/PVDF, has been successfully prepared through the casting and etching method. The MIL-88A/CB/PVDF film can respond to the change of ambient solvent atmosphere with the whole or part of the composite film exhibiting a synergistic coupling of the surface color change and the out-of-plane motion under the driven of the methanol vapor. The bending deformation of 730° can be quickly achieved in about 1.66 s and the color change covers a wide range with three high saturation color (red, green and blue) which can be observed with different view angles. In addition, some simple devices including smart flower, inchworm walker, and visual gas sensor were designed based on this material. This work is the first example which apply MOF to solvent driven dual response materials with simultaneous deformation and discoloration, which opens up a new application field for MOF, and also provides a new perspective for the preparation of smart materials.
研究领域:
材料科学
·
智能材料
·
软体机器人技术
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Can Sun,Runze Guo,Zhexiao Zhu,Shouxin Zhu,Jingyi Qu,Zijie Fang,Xiaolu Xu,Jiahui Lin,Yangben Chen,Shijie Zhang,Hui Zheng
Photocatalytic nitrogen fixation as a green, environmentally friendly, mild and low energy-consuming nitrogen fixation is considered as an ideal way to produce ammonia. Herein, inspired by nitrogen-fixing enzymes, the MOF materials Fe-sdc and Ti-sdc were synthesized by a simple solvothermal synthesis method using Fe and Ti as metal nodes and 4,4′-stilbenedicarboxylic acid (H 2 sdc) as a ligand. The ammonia production rates of Fe-sdc and Ti-sdc were 61.01 μmol g −1 h −1 and 46.84 μmol g −1 h −1 . The 15 N 2 isotope experiments were utilized to determine the nitrogen source for ammonia synthesis during the nitrogen fixation process of Fe-sdc. Various characterization analyses were also utilized to analyze the reasons for the better nitrogen fixation performance of the two catalysts.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Du Jia,Chen Lixuan,Wu Yiming,Wei Xin,Jia Jingyuan,Sun Kenan,Li Bingke
Nowadays, the advancement of eco-friendly, clean, sustainable and renewable new energy has emerged as a research priority for scientists worldwide. Electrolytic water technology is founded on the principle of electrochemical or photoelectric decomposition of water, is deemed as one of the most promising and most feasible approaches to reach industrial production. Traditional OER (oxygen evolution reaction) electrocatalysts like IrO 2 and RuO 2 are beset by high costs and vulnerability to poisoning. Hence, it is essential to develop more economical, more stable and more efficient materials for the application of OER reactions. In this study, a series of AQ-doped (AQ = anthraquinone) MOF-74 materials were fabricated through a one-step solvothermal approach. The surface loading of the conjugated organic small molecule AQ on CoNi-MOF-74 is capable of effectively boosting the inadequate electrical conductivity of the bulk MOF material, thus significantly enhancing the performance of OER. The optimized ratio of material composition of AQ20@MOF-74 displayed significantly enhanced OER activity. with a lower overpotential of 272 mV at 10 mA cm −2 and a smaller Tafel slope of 78 mV dec −1 . The research findings presented in this thesis provide a novel approach for the design and optimization of highly efficient OER electrocatalysts based on MOFs.
研究领域:
材料科学
·
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jinmiao Wang,Lulu Wang,Ruixue Wu,Chuanbin Fan,Xia Zhang,Yuhua Fan
MOF-based materials, as bifunctional catalysts for electrocatalytic water splitting, play an important role in the application and development of clean fuel hydrogen energy. This study presents a series of novel 3D Co-based MOFs with layered networks, including [Co(4,4′-bipy)0.5(aip)(CH3OH)·H2O]n (Co-MOF 1), [Co2(1,3′-bit)(aip)2(CH3OH)·H2O]n (Co-MOF 2), [Co(4,4′-bipb)(aip)]n (Co-MOF 3), and [Co2(4,4′-bipe)(aip)2·1.5H2O]n (Co-MOF 4). Their single-crystal structures of Co-MOFs 1–4 are characterized and analyzed before being applied in alkaline solutions for water decomposition (OER and HER). The electrocatalytic tests indicate that Co-MOFs 1–4 exhibit a good performance. Notably, Co-MOF 4 exhibits great behavior which has low overpotentials of 94 and 188 mV (OER) as well as 185 and 352 mV (HER) at the currents of 10 and 100 mA cm–2, respectively. In comparison with Co-MOFs 1–3, Co-MOF 4 has the lowest Tafel slopes, highest ECSA, and smallest resistance. The immanent qualities, such as distinct interwoven long chain layered structure, unsaturated coordination modes, and synergistic catalytic qualities among Co ions, contribute to explaining the results. The fundamentals provide valuable information for the investigation of innovative MOF-based bifunctional electrocatalysts for overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2022
·
IF 1.097
Shaoxiong Wu,Lianyuan Wang,Haiyan Zhu,Jing Liang,Liang Ge,Cong Li,Ting Miao,Jian Li,Zhenxing Cheng
Chemical warfare agents, such as nerve agents (GD and VX) and blister agents (HD), have strong toxicities to mankind. In recent years, zirconium-based metal-organic frameworks have been found to be attractive materials for chemical warfare agent degradation. Among them, metal-organic framework-808 (MOF-808) and porous coordination network-222 (PCN-222) were the best. However, few papers pay attention to their practical application. In this work, we prepared MOF-808 and PCN-222 using water phase and organic solvothermal methods, respectively. Their performance for the catalytic degradation of chemical warfare agents under practical decontamination conditions was studied. The results showed that MOF-808 displayed a high potency for catalytic hydrolysis of VX (10,000 mg L−1) in unbuffered solution. PCN-222 exhibited weaker reactivity with a half-life (t1/2) of 28.8 min. Their different performances might stem from the different connectivity of the Zr6 nodes and framework structures. The results illustrated that the hydrolysis of high-concentration GD required a strong alkaline buffer to neutralize the hydrolysis product of hydrofluoric acid (HF) to avoid catalyst poisoning. When H2O2 was used as the oxidant instead of O2, both zirconium-based metal-organic frameworks performed with effective catalytic potency for HD degradation without any special lighting and so was suitable for practical application, whereas the products obtained from HD, such as HDO2 and V-HDO2, still possessed vesicant toxicity. Overall, MOF-808 prepared via a water-phase synthesis performed with effective catalysis for the degradation of high-concentration VX, GD, and HD with t1/2 of < 0.5, 3.1 and 2.2 min, respectively, exhibiting its potential for practical applications.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Peng Zhang,Xin Yin,Deguang Zhang,Pengyu Guo,Wenbo Liu,Runwei Wang,Zongtao Zhang,Shilun Qiu
3D (Three-dimensional) hollow porous structured materials received a lot of attention due to their significant benefits in photocatalytic reactions. In this study, 3D ZnIn 2 S 4 -In 2 S 3 hollow hierarchical porous nanotubes were synthesized by a one-step MOF (metal–organic framework) templating strategy as efficient catalysts for photocatalytic hydrogen evolution in water. The dynamic process between the internal collapse of In-MIL-68 and the growth of ZnIn 2 S 4 crystals with attached outer edges led to the one-step in situ preparation of hollow ZnIn 2 S 4 -In 2 S 3 heterojunction catalysts. Crucially, In-MIL-68 simultaneously induced the formation of In 2 S 3 hollow porous nanotubes and the construction of ZnIn 2 S 4 -In 2 S 3 hierarchical heterojunction with ultrathin nanosheets. The optimal photocatalytic efficiency was obtained by adjusting the relative composition of the two-component heterojunction, and the optimized ZnIn 2 S 4 -In 2 S 3 -10 showed hydrogen evolution efficiency of 5.01 mmol·h −1 ·g −1 under visible light irradiation in the absence of co-catalysts and a high AQY (the apparent quantum yield) of 16.23 % at 420 nm, which was noticeably higher than the photocatalytic efficiency of the one-component and two-step synthesized In 2 S 3 -ZnIn 2 S 4 . Both theoretical and experimental results demonstrated that the construction of heterojunction and the forming of hollow porous nanotubes enhanced visible light absorption and promoted the separation and transfer of photogenerated carriers, thereby increasing the photocatalytic activity of the prepared materials. Meanwhile, ZnIn 2 S 4 -In 2 S 3 hierarchical hollow nanotubes exhibited good stability and reusability, offering a new way to fabricate MOF-based hollow hierarchical photocatalysts.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）