FUEL
·
2024
·
IF 6.7
Lan Xiao,Jian Wen,Guanghui Wu,Pinghua Chen,Mengxue Wang,Hualin Jiang,Xinming Zhou,Jianan Yan
Rational design of efficient and low-cost oxygen evolution reaction (OER) electrocatalysts is a key challenge in the development of various clean energy technologies. Here, flower-shaped FeCo-MOF-74/Mn-MOF-74 (FeCo/Mn mass ratio x:y, denoted as FCMx-y) electrocatalysts were synthesized through a two-step simple solvothermal methods and applied to the OER. These synthesized OER catalysts exhibited effective synergistic effects, high conductivity, electrochemical active surface area, carrier density, enhancing the intrinsic activity of MOF-74. Among them, the optimized FeCo-MOF-74/Mn-MOF-74 (named FCM1-2) required only a low overpotential of 280/382 mV to achieve 10/300 mA cm −2 in 1 mol/L KOH, outperforming control samples and commercial IrO 2 . Furthermore, the catalyst demonstrated high electrocatalytic activity, rapid catalytic kinetics, and excellent stability. This research provides a reference for the industrial design of advanced OER electrocatalysts with high current density for sustainable energy technologies.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yujie Guo,Lingfei Li,Maofeng Zhang,Shihao Xu,Changlong Jiang
Polymetallic MOFs heterostructural composites enhance their usage in a range of sensing domains by combining two or more different MOFs to produce a new MOF-on-MOF integrated module. As its widespread utilization of flavomycin (Fla), there are currently complications with agricultural residue and the environment, consequently, a highly sensitive, portable technology for identification will be required to handle environmental monitoring in real-time. In this work, the structural characterization and characteristics of the two-layer MOF-on-MOF heterostructure are investigated using the epitaxial growth method. Electrons migrate from the Fe metal center to the organic ligand primarily as a result of hydrogen bonding between Fla and the surface of Fe-MOF and energy transfer amongst the Fe atoms and NH 2 -MIL-101 (Eu). The synergistic impact of NH 2 -MIL-101(Eu) and Fe-MOF improves the sensitivity and accuracy of detection, which has a 4.8 n m detection limit, enabling the high sensitivity detection of Fla. Likewise, we put together a handheld sensing platform incorporating aerogel and sensing materials that can meet the expectations of real-time monitoring and multiple actual sample detection, and fluorescent MOFs materials offer an innovative viewpoint on the application of creating flexible sensors, enabling a new method of visualization for food safety and environmental early alerting.
研究领域:
材料科学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 13
·5021
·
IF 4.6
Xinlan Han,Jinhua Li,Siyu Tao,Guowei Dou,Sanawar Mansur,Xinqian Zhang
The specific structure and diverse properties of hybrid organic–inorganic perovskite materials make them suitable for use in photovoltaic and sensing fields. In this study, environmentally stable organic–inorganic hybrid perovskite luminescent materials using Pb–MOF as a particular lead source were prepared using a mechanochemical method. Based on the fluorescence intensity of the MAPbBr3/MOF composite, the mechanized chemical preparation conditions of Pb–MOF were optimized using response surface methodology. Then, the morphological characteristics of the MAPbBr3/MOF composite at different stages were analyzed using electron microscopy to explore its transformation and growth process. Furthermore, the composite form of MAPbBr3with Pb–MOF was studied using XRD and XPS, and the approximate content of MAPbBr3in the composite material was calculated. Benefiting from the increase in reaction sites generated from the crush of Pb–MOF during mechanical grinding, more MAPbBr3was generated with a particle size of approximately 5.2 nm, although the morphology of the composite was significantly different from the initial Pb–MOF. Optimal performance of MAPbBr3/MOF was obtained from Pb–MOF prepared under solvent-free conditions, with a milling time of 30 min, milling frequency of 30 Hz and ball–material of 35:1. It was also confirmed that the mechanochemical method had a good universality in preparing organic–inorganic hybrid perovskite/MOF composites.Keywords:Pb–MOF;organic–inorganic hybrid perovskite/MOF composites;mechanochemical method;optical properties
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Processing and Synthesis
·
2022
·Vol. 11
·期 1
·184-194
·
IF 3.97
Qiuyun Zhang,Binbin Yang,Yuanyuan Tian,Xianju Yang,Rongfei Yu,Jialu Wang,Taoli Deng,Yutao Zhang
In the present study, a facile solvothermal method was used for the synthesis of silicotungstic acid (HSiW) immobilized on Ce-based metal organic framework (Ce-BDC) and embedded in Zr-based metal-organic framework (UiO-66(Zr)) composite catalyst, namely, Ce-BDC@HSiW@UiO-66 for the production of biodiesel through green fatty acid esterification. The obtained hybrids were characterized by various characterization technologies, including Fourier transform infrared, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N 2 physisorption, X-ray photoelectron spectroscopy, and temperature-programmed desorption of NH 3 (NH 3 -TPD) analysis. The characterization analyses showed that the hybrids have been successfully synthesized. Also, the volume and pore size of UiO-66(Zr) were changed by introducing HSiW@Ce-BDC, and the resulting Ce-BDC@HSiW@UiO-66 possessed the mesoporous structure and relatively high surface area. Simultaneously, the NH 3 -TPD analysis of Ce-BDC@HSiW@UiO-66 reveals that the acid strength was increased in comparison with HSiW@Ce-BDC. In addition, the composite Ce-BDC@HSiW@UiO-66 demonstrated high catalytic activity, and the oleic acid esterification gave 81.5% conversion at optimum conditions of 0.2 g catalysts, 1:30 oleic acid to methanol molar ratio at 130°C for 4 h. More interestingly, after six recycling cycles, the reduction in the conversion rate was only 4.6%, indicating that Ce-BDC@HSiW@UiO-66 has excellent reusability. Our study provides an effective approach to synthesize multifunctional hybrids for green biofuel production.
研究领域:
化学工程
·
催化材料
·
可再生资源
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Qiang Li,Qi Zhou,Yanling Wu,Yingxue Shi,Yingqi Liu,Hao Deng,Siwei Chen,Zhiheng Li,Erpeng Wang,Huayue Zhu,Qi Wang
Accelerating the separation of carriers in the heterojunction plays vital role in the photoelectrocatalytic (PEC) process, yet it remains a challenging undertaking. Herein, a MOF-on-MOF based dual S-scheme heterojunction (BiVO 4 /NH 2 -MIL-125(Ti)/NH 2 -MIL-53(Fe), denoted as BVO/NM125/NM53) was rationally designed and prepared for PEC removing and detoxification of organic contaminants (phenol, tetracycline hydrochloride, ciprofloxacin and norfloxacin). The S-scheme heterojunction was double confirmed by DFT calculation and XPS analysis. The charge transfer resistance of BVO/NM125/NM53 photoanode decreases to 1/11 of bare BiVO 4 photoanode. Meanwhile, the photocurrent density was 3 times higher, demonstrating a marked improvement in carrier separation efficiency due to dual S-scheme heterojunction. The photoanode achieved 94.3 % removal of phenol within 60 min and maintained stable performance over 10 consecutive cycles, demonstrating good PEC efficiency and structural stability. The BVO/NM125/NM53 photoanode also showed effectiveness in removing antibiotics, with chlorophyll fluorescence imaging confirming a significant reduction in the ecotoxicity of intermediates. For example, wheat seed germination, growth, chlorophyll and Carotenoid production were not affected, which was similar to that of deionized water. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis identified •O 2 - and •OH as the primary active species. This work demonstrates the effectiveness of developing MOF-on-MOF heterojunctions for visible-light response and enhancing charge separation in PEC.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Fuhuai Cao,Xinlong Zhang,Yaya Wang,Moran Chen,Xinqi Hu,Mengkun Zhou,Rongmei Liu
The design of nanostructured electrode materials and the tuning of their components is one of the effective ways to improve the electrochemical properties of the materials. Here, we employed a cost-effective hydrothermal synthesis method to successfully construct NiFeSe@NiFe-MOF electrode materials with nanocoral rod-like structures. The unique coral rod-like structure provides a larger specific surface area for electron storage, exposing more electrochemical reaction active sites on the electrode surface. Through DFT theoretical calculations we found that the metallic property of NiFeSe@NiFe-MOF-2 are greatly enhanced compared with NiFe-MOF, which can lead to higher conductivity and electron transfer efficiency of the selenized material. Moreover, the introduction of selenium enhances the adsorption capacity of the material for anions in alkaline solution, which makes the structure of the MOFs more stable and obtains better electrochemical reversibility making the electrochemical performance of the electrode material in all aspects. Compared with the NiFe-MOF material, NiFeSe@NiFe-MOF-2 has excellent capacitance retention up to 81.0 % at different current densities (1 A/g-10 A/g), and the stability of the cycle performance is greatly improved up to 84.0 %. The assembled device NiFeSe@NiFe-MOF-2 // AC has excellent multiplication performance up to 92.7 % and stable electrochemical cyclability up to 99.7 %. Moreover, the energy density is 61.0 Wh kg −1 at a power density of 5060.0 W kg −1 . The coral rod-like NiFeSe@NiFe-MOF composites synthesized in this experiment possessed excellent charge storage capacity and stability properties. These results indicate that the electrode materials developed in this paper have good application prospects in supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Rou-Yu Li,Wenyu Yuan,Meng-Ru Cui,Boda Li,Hui Zhang,Zhenhao Peng,Quan-Guo Zhai
The interfaces in heterostructure photocatalysts play an important role in charge migration, but the rational controllable interfacial construction remains a challenge. Herein, a covalently bonded interface with delocalized π bonds was controllably constructed via the encapsulation of UiO-66-NH2 nanoparticles in MUV-10 skeletons. The UiO-66-NH2/MUV-10 heterojunction enabled both efficient capture and conversion of CO2 and H2O. The delocalized π bond in the covalent interface efficiently accelerated interfacial charge migration, suppressed carrier recombination, and reduced the work function for electronic effusion. As a consequence, UiO-66-NH2/MUV-10 exhibited superior CO2 photoreduction activity with H2O under visible light irradiation in the gas–solid phase. The CO evolution rate reached as high as 38.7 μmol g−1 h−1, which surpassed that of most commonly reported gas–solid phase photocatalysts. This work not only provides a feasible strategy for the controllable construction of interfaces but also demonstrates the great potential of interfacial engineering for efficient photocatalysis and other related areas.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yongqing Wang,Zhiqiang Lan,Xiantun Huang,Haizhen Liu,Jin Guo
Using a deposition-reduction method, Mg/MOF nanocomposites were prepared as composites of Mg and metal-organic framework materials (MOFs = ZIF-8, ZIF-67 and MOF-74). The addition of MOFs can enhance the hydrogen storage properties of Mg. For example, within 5000 s, 0.6 wt%, 1.2 wt%, 2.7 wt%, 3.7 wt% of hydrogen were released from Mg, Mg/MOF-74, Mg/ZIF-8, Mg/ZIF-67, respectively. Activation energy values of 198.9 kJ mol −1 H 2 , 161.7 kJ mol −1 H 2 , 192.1 kJ mol −1 H 2 were determined for the Mg/ZIF-8, Mg/ZIF-67, Mg/MOF-74 hydrides, which are 6 kJ mol −1 H 2 , 43.2 kJ mol −1 H 2 , and 12.8 kJ mol −1 H 2 lower than that of Mg hydride, respectively. Moreover, the cyclic stability characterizing Mg hydride was significantly improved when adding ZIF-67. The hydrogen storage capacity of the Mg/ZIF-67 nanocomposite remained unchanged, even after 100 cycles of hydrogenation/dehydrogenation. This excellent cyclic stability may have resulted from the core-shell structure of the Mg/ZIF-67 nanocomposite.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Mengli Yan,Zhuo Liu,Shuang Li,Jianwang He,Yan Xu
Metal–organic frameworks (MOFs), known for their exceptional gas permeability and abundant active sites, are a class of porous coordination polymers that can serve as ideal candidates for constructing advanced gas sensors. However, the limitations of low electrical conductivity and inadequate stability under extreme conditions hinder their advancements in gas-sensing applications. Moreover, a single MOF structure occasionally demonstrates insufficient selectivity toward specific gases, failing to meet stringent sensing requirements. To overcome these challenges, this study innovatively constructs an MOF-on-MOF architecture by etching Ti-MOF into a hollow cage-like structure with l-glutamic acid and connecting it with Ni2+ ions to form Ni-MOF via peptide bonds. The approach not only enhances the specific surface area and pore structure of the material but also facilitates carrier transport rates at the interface by effectively linking the two MOFs. The resultant MOF-on-MOF structure exhibits remarkable selectivity and sensitivity in detecting triethylamine gas at a low operating temperature of 140 °C, along with exceptional reproducibility and long-term stability. This work demonstrates a novel amino acid-assisted feasible and simple method to construct MOF-on-MOF material, showcasing immense potential in high-performance gas detection applications.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 17
·9717-9725
·
IF 14.511
Yao Chen,Dong Yang,Xin Xin,Zhongshan Yang,Yuchen Gao,Yonghui Shi,Zhanfeng Zhao,Ke An,Wenjing Wang,Jiangdan Tan,Zhongyi Jiang
Rational manipulation of the photogenerated charge transfer inside the photocatalyst is key to enhancing the photocatalytic performance. Herein, inspired by the charge transport chain in natural photosynthesis, a novel multi-stepwise charge transfer strategy is proposed for the ingenious design of photocatalysts. To confirm the effectiveness of this strategy, a kind of MOF@MOF/TiO2 dual-heterojunction was constructed by depositing TiO2 nanoparticles on the surface of core–shell MOF@MOF hetero-frameworks. The energy band potentials of the three moieties in MOF@MOF/TiO2 exhibit a multi-stepwise characteristic, wherein the slight gradient difference of energy bands helps in deconcentrating the charge in multiple energy bands and affords a smaller interface resistance, thus rendering a high charge transfer efficiency. Accordingly, compared with the single-heterojunction counterparts with one-step charge transfer including MOF@MOF and MOF/TiO2, the MOF@MOF/TiO2 dual-heterojunction achieves a much higher photocatalytic hydrogen evolution rate of 7.108 mmol g−1 h−1 under full-spectrum irradiation. This study may offer a deep insight into the charge transfer behavior in the photocatalytic process, along with the rational design of high-performance photocatalysts for sustainable energy conversion applications.
研究领域:
材料科学
·
化学
·
光催化
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yong Xiang,Chang-Yuan Cheng,Meng-Hao Liu,Wen-Cai Bai,Zhou-Xuan Zang,Li Xu,Yi Yu,Guo-Ji Liu
The design of an efficient adsorbent for Au(III) has remained a challenging research focus, as the adsorbent needs to overcome competition from other ions while simultaneously addressing pore blockage caused by the reduction of Au(III) to elemental gold. In this study, we report the synthesis of a hierarchically porous metal–organic frameworks (MOFs) with ultra-large pores (300 nm) using the “MOF in MOF” method. This material facilitates enhanced adsorption kinetics by increasing the rate of gold ion adsorption and effectively prevents pore blockage resulting from Au(III) reduction, enabling access to the majority of adsorption sites. Batch experiments were conducted, and various complex water mixtures, including freshwater, simulated electronic waste solution, and gold ore leachate, were tested to demonstrate the rapid extraction of trace amounts of gold by the developed adsorbent. Remarkably, without additional functionalization, the adsorbent solely based on its pore advantage achieved a gold adsorption capacity of 1184 mg/g and reached 80 % adsorption within just 5 min (C0 = 100 mg/L, V/m = 2 L/g). Furthermore, the gold recovered from the leachate of gold ore exhibited a purity of 23.8 K (99.2 % purity).
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Hua Song,Xiaojuan Li,Bolong Jiang,Mingyue Gong,Tianzhen Hao
A highly active and stable MOF-199-supported ionic liquid [Hnmp][H2PO4] (IL-NP) adsorbent (Py/MOF) was successfully synthesized and characterized via XRD, SEM and TEM, TG-DTG, FT-IR, BET, and XPS technologies. The effects of different sulfides and interfering components present in model oils on the adsorptive desulfurization (ADS) performance of Py/MOF were studied. The results show that the regular octahedron crystalline structure of MOF-199 was well preserved and IL-NP fixed on the surface of MOF-199 presented like a flower after grafting ionic liquid IL-NP. The Py/MOF showed highly ordered canals, which are larger than those of MOF-199. Upon introducing IL-NP to MOF-199, the ADS activities were improved, which can be attributed to the improved intimate contact between sulfur compounds and adsorbent, the additional adsorption acidic sites for slightly basic sulfur compounds, and the increased pore size with mesoporous pores appearing. The ADS activity of Py/MOF adsorbing different sulfides was in the order of DBT > BT > 3-MTP > TP > 2,5-DMTP, and the effect of interfering component on ADS performance of Py/MOF was in the order of cyclohexene > toluene > water > ethanol. After 4 times of regeneration, the DBT removal onto Py/MOF was still at 93.8%, which decreased by 4.9% as compared to that of the fresh adsorbent.
研究领域:
化学工程
·
材料科学
✓ 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）