JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Linshuai Liu,Nannan Wang,Chunlin He,Yuezhou Wei,Jingjing Wang,Xinpeng Wang
Considering the unexpected nuclear power waste emission and potential nuclear leakage, the exploration of robust materials for the effective capture and storage of radioactive iodine is of great importance but still remains a challenge. In this work, we report the rational synthesis of functionalized NH 2 -UiO-66-on-ZIF-67 architecture to enhance the static adsorption and retention of volatile iodine. Such MOF-on-MOF heterostructures was fabricated through seeding ZIF-67 core on the surface of NH 2 -UiO-66 satellite via a facile polyvinylpyrrolidone (PVP) regulated internal extended growth strategies. NH 2 -UiO-66-on-ZIF-67 exhibited unique core-satellite structure, which significantly promotes the binding interactions with iodine through synergizing of the N-rich imidazole moieties and surface functionalized amino groups within the porosity channels. As a result, the as fabricated NH 2 -UiO-66-on-ZIF-67 achieves enhanced mass diffusion and high capture capacity of 3600 mg/g for iodine vapor under static sorption conditions. Moreover, water vapor in humid conditions (relative humidity of 18 %) has almost no effect on the static iodine adsorption performance of the material. This study sheds light on a reliable MOF-on-MOF hybrid strategy for effective radioiodine treatment to ensure the safety nuclear waste management.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fan Xu,Xin Meng,Rui Zhao,Daoming Jin,Wenhua Dai,Dandan Yang,Zhong Xin
The utilization of CO 2 for the production of light olefins through catalysis with iron-based catalysts presents a viable strategy to address the challenges of carbon neutrality. In this study, we synthesized a novel hybrid catalyst Fe 2 O 3 @ZrO 2 , derived from the pyrolysis of dual metal–organic frameworks (NH 2 -MIL-88B@UiO-66). Under specific conditions (340 °C, 3.0 MPa, CO 2 /H 2 = 1:3, 10000 mL g cat −1 h −1 ), the Fe 2 O 3 @ZrO 2 catalyst exhibited a notable space–time yield of light olefins at 12.7 mmol g −1 h −1 . The characterizations results show an electron transfer from ZrO 2 to the Fe 2 O 3 surface was observed at the heterointerface of Fe 2 O 3 and ZrO 2 . This electron transfer mechanism was identified as advantageous for the formation of the active phase Fe 5 C 2 . This research introduces an innovative use of the hybrid Fe 2 O 3 @ZrO 2 catalyst derived from MOF-on-MOF, holding significant promise in advancing the field of CO 2 hydrogenation catalysts.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yutian Cai,Runyang Zhou,Shanshan Zhang,Mengke Qiao,Yongzhi Cheng,Yingli Zhu,Hui Luo,Pingan Chen,Xiangcheng Li,Fu Chen
MOFs-derived magnetic carbon-based composites exhibit great application potentials in electromagnetic absorption field. Nowadays, the MOF-on-MOF hybrid materials, constructed by self-assembly of two or more MOFs, gradually become the prevailing precursors for efficient microwave absorbers due to the flexible structure and component design which are beneficial to improving microwave attenuation and optimizing impedance matching. Herein, the binary MOF-on-MOF hybrid templates MIL-88A@ZIF-67 has been fabricated based on a surfactant-assisted growth strategy, and subsequently thermally converted into the spindle-like Co 3 Fe 7 @NC/magnetic MWCNTs composites (CFM) through a DCDA-assisted carbothermal reduction method. It has been revealed that the carbothermal temperature could not only regulate the crystallinity of Co 3 Fe 7 alloys and magnetism of CFM composites, but also make significant impact on chemical and mesoscopic structure of conductively hierarchical architecture composed by surficial MWCNTs and pyrolytic carbon derived from various ligands of different MOFs. Among the three proposed absorbers in this work, the CFM-700 sample with densest surficial magnetic MWCNTs achieved a satisfied balance between intrinsic microwave consumption and impedance matching due to the magnetic-dielectric synergistic effect. The reflection loss of CFM-700 could keep staying below −20 dB in an ultra-wide range from 3.6 GHz to 18.0 GHz when the thickness varies from 1.3 mm to 5.45 mm. Moreover, the minimum reflection loss of CFM-700 is −68.75 dB at 1.88 mm and the effective absorbing bandwidth could reach 4.72 GHz at only 1.55 mm. It is believed that this work paves an inspiring way to design conductively hierarchical magnetic carbon-based composites with excellent microwave absorption through construction of MOF-on-MOF hybrid structures.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chengjun Dong,Ruonan Tian,Yanlin Zhang,Kaili Liu,Gang Chen,Hongtao Guan,Zongyou Yin
Rational integration of multifunctions is an emerging strategy to develop novel chemiresistor nano platforms with superior sensing properties. Herein, a stepwise synthesis strategy is developed to assemble two MOFs with huge mismatch into MOF-on-MOF heterojunction , which was nanoarchitectured into Fe 2 O 3 @ZnFe 2 O 4 radial-heterospindles. The Fe 2 O 3 @ZnFe 2 O 4 heterospindles exhibited outstanding selective acetone detection with multifaceted superiorities, such as high response, low limit of detection, fast response and recovery time, and good linearity in responses with a wide concentration window. An in-depth discussion revealed that such multifaceted sensing characters can be attributed to the distinct radial-heterostructure which proffer synergetic effects in the unimpeded gas diffusion with mesoporous sensing nanoarchitecture, favored interfacial charge transport in radial heterojunction, abundant active adsorption/reaction sites by rich oxygen vacancies, and exponential/efficient tuning of sensor resistance with barrier height. This synthetic strategy here may offer a new opportunity for fabricating dual-to-multi MOFs-based advanced nanostructures towards practical chemiresistor nanoplatforms with favorable multifaceted superiorities.
研究领域:
材料科学
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化学传感器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Linshuai Liu,Lifeng Chen,Kunyapat Thummavichai,Zhenxiong Ye,Youbin Wang,Toyohisa Fujita,Xinpeng Wang
The effective capture of radioactive iodine vapor is crucial for radiation safety during spent fuel reprocessing. However, current materials used for iodine vapor capture have limitations such as low adsorption efficiency and poor stability, which hinder the effectiveness. To address this issue, an efficient, stable, recoverable and heterogeneous MOF-on-MOF [NH 2 -MIL-101-on-NH 2 -UiO-66] adsorbent was prepared using the epitaxial growth strategy. The adsorbent was extensively characterized with various technologies including FT-IR, XPS and XRD, and batch experiments were conducted to evaluate the performance in iodine gas adsorption. Results showed that the adsorption capacity of NH 2 -MIL-101-on-NH 2 -UiO-66 reached 1930 mg/g at 80 °C and ambient pressure, outperforming the parent MOFs, with a 20–33% higher adsorption rate and a 1.52–2.74 times higher adsorption capacity. Notably, the adsorbent exhibited superior performance compared to commercial silver-exchanged zeolite and other MOFs adsorbents. The excellent adsorption performance of this adsorbent can be attributed to its abundant adsorption sites and well-defined pore structure. Additionally, the adsorbent displayed good thermal stability, withstanding temperatures up to 360℃. Overall, this study provides a highly effective material for iodine vapor adsorption and contributes to the understanding of novel MOF-on-MOF architectures and the applications.
研究领域:
材料科学
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核能工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Haifeng Ru,Yanji Bao,Yifeng Wang,Xiaohong Wang,Jinchun Tu,Qiang Wu,Yi Li,Lei Ding
Direct seawater electrolysis offers a viable solution to the excessive consumption of fresh water resources in existing industrial electrolytic water processes. However, electrolysis efficiency and material stability are affected by electrode material corrosion caused by chlorine evolution reactions (CER) at the anode positions. In this study, the prepared S-Ni-MOF/Fe-MOF material exhibits an exceptional performance in the oxygen evolution reaction (OER) both in alkaline solution and seawater. Specifically, the material achieves low overpotentials of 281 and 279 mV in 1.0 M KOH and alkaline seawater at 100 mA cm −2 current density, and maintains stability for at least 100 h in both electrolyte solutions. The electronic structure of MOF-on-MOF was modulated through the introduction of S 2− , which induced a large number of vacancies. Furthermore, the reconstruction process on the material surface was accelerated by the formation of NiOOH and FeOOH, that served as protective layers and prevented the corrosion of the electrode material by Cl − , thereby enhancing its stability in seawater. Furthermore, computational studies have indicated that the Fe-Ni active sites at the heterointerface exhibit a synergistic effect, which has been confirmed by density functional theory (DFT) calculations. These results prove that this combination significantly reduces the energy barrier associated with the OER. Consequently, the reaction process is accelerated.
研究领域:
材料科学
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电化学
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Bing He,Ying-Jie Wang,Xuefeng Bai,He Bian,Yabo Xie,Rui Li,Jian-Rong Li
MOF-on-MOF composites are deemed promising candidates to accomplish synergistic CO 2 capture and photoreduction thanks to their plentiful active sites, extended light response range, timely separation of photoexcited electron-hole pairs, and large CO 2 adsorption capacities. Unfortunately, the controllable growth of the designed MOF-on-MOF heterostructure is challenging. Deficient interphase contact and the consequent mass transfer deprivation is one of the primary obstacles severely impairing the catalytic efficiency. Herein, the contact between two widely-employed MOFs of Ni-BDC and NH 2 -MIL-125 was significantly strengthened by exploiting a self-assembled array of Ni-BDC microsheets. In contrast to the spontaneously formed spheroidal aggregate, the loosely-packed array exhibits amplified accessible surfaces to interact with NH 2 -MIL-125, contributing to a radically improved interfacial built-in electric field and 7∼9 times rises in the product yields. Moreover, the preferably thin thickness of Ni-BDC microsheets prompts its macroscopic flexibility, permitting intensified deformation for enhanced interphase contact. Coupled with the additional contribution from its copious Lewis acid sites, the developed NH 2 -MIL-125@Ni-BDC array simultaneously converted CO 2 into CO and CH 4 at rates that cannot be matched by its isostructural Co counterpart with declined acidity and flexibility. This work innovatively reveals the immense importance of morphology tailoring and assembly tactic to interphase contact modulation and the upgrade of catalyst performances.
研究领域:
材料科学
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催化化学
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环境科学
✓ 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
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环境科学
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食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2022
·Vol. 16
·期 1
·e202201947
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IF 9.14
Lujiao Mao,Dandan Chen,Yuanyuan Guo,Cheng Han,Xuemei Zhou,Zhi Yang,Shaoming Huang,Jinjie Qian
Graphical Oxygen evolution : Unique anisotropic MOF-on-MOF materials can be conveniently obtained by using solvents with different polarities. After carbonization, they exhibit a satisfactory oxygen evolution reaction performance that can be attributed to the synergistic effect between Fe and Ni to accelerate the proton-coupled electron transfer kinetics. The exploration of non-noble metal electrocatalysts with high catalytic activity and stability for oxygen evolution reaction (OER) has become particularly urgent. Here, FeNi-based Prussian blue analogues (PBAs) were obtained by adding different solvents, where PBA particles preferentially grew on the surface plane/edge of coordination polymer precursor (Ni-ABDC) with various polarities. This resulted in the formation of FeNi-PBA-plane/edge morphologies, respectively. Notably, on account of more exposed PBAs, FeNi nanoparticles were uniformly supported on the porous N-doped carbon nanomaterials. Among them, the calcined FeNi-NC-800 underwent an interesting pre-activation process and exhibited a low overpotential of 281 mV at 10 mA cm −2 and a small Tafel slope of 82 mV dec −1 in 1.0 m KOH. This bimetallic sample showed superior OER activity and stability in comparison with control materials, which could be attributed to its abundant FeNi nanoparticles, high nitrogen content, large specific surface area, and synergistic effects between Fe and Ni atoms. In addition, relevant theoretical calculation on the optimal catalyst, FeNi-NC-800, further demonstrated its efficient OER performance with effective Fe-doping in the Ni-based oxyhydroxides.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
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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
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材料科学
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化学
✓ 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 ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Sumin Xu,Wenjing Liu,Jiajia Zhang,Jianying Qu
In this work, a MOF-on-MOF synthesis strategy was employed to successfully prepare (ZIF-8)-on-(CoCu-MOF) composites, which were further pyrolyzed at high temperature to obtain CoCu-CN nanomaterials. The morphological and structural properties of the materials were systematically investigated using SEM, FTIR, XRD and XPS. A novel sensor of CoCu-CN/GCE was constructed at a glassy carbon (GC) substrate, which exhibited excellent electrocatalytic activity to redox reactions of acetaminophen (PA) and p-aminophenol (4-AP). Under optimal conditions, the CoCu-CN/GCE sensor can be employed to detect simultaneously PA and 4-AP in the wider linear ranges of 0.05–270.00 μM and 0.05–170.00 μM, respectively with the lower detection limits of 0.020 μM and 0.019 μM respectively. Practical sample analysis for pharmaceutical and lake water gave satisfactory results. The proposed sensor displays excellent selectivity and stability with potential analytical applications
研究领域:
材料科学
·
分析化学
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电化学
✓ 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）