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Kat8 OR MOF OR Myst1

Yijin Wu, Yucheng Wang, Ruixiang Wang, Pengfang Zhang, Xiaodong Yang, Huijuan Yang, Jun-Tao Li, Yao Zhou, Zhi-You Zhou, Shi-Gang Sun
The Fe/N/C catalysts of reasonable design and synthsis, one of most promising non-precious metal catalysts of oxygen reduction reaction in acidic medium for developing efficient polymer electrolyte membrane fuel cells. Herein, we developed a highly active MOFs-derived S-doped Fe/N/C catalyst (S-Fe/Z8/2-AT) prepared by heating a precursors mixture in Ar atomsphere. The S-Fe/Z8/2-AT catalyst shows uniform S doping in the carbonaceous framework and a 3D network porous structure which has macro-meso-micro hierarchical porosity...
March 22, 2018: ACS Applied Materials & Interfaces
Hui Qiong Wu, Chang Sheng Yan, Feng Luo, Rajamani Krishna
Different from the established crystal engineering method for enhancing gas-separation performance, we demonstrate herein a distinct approach. In contrast to the pristine MOF (metal-organic framework) material, the C2 H2 /CO2 separation ability for the resultant Ag NPs (nanoparticle)@Fe2 O3 @MOF composite material, estimated from breakthrough calculations, is greatly enhanced by 2 times, and further magnified up to 3 times under visible light irradiation.
March 21, 2018: Inorganic Chemistry
Junyi Yang, Xiao Feng, Guangnong Lu, Yulin Li, Chaochao Mao, Zhongliang Wen, Wenbing Yuan
The use of salts as grinding media to assist the mechanosynthesis, and the following one-pot mechanochemical post-synthesis, of hierarchically porous MOFs was carried out efficiently by ball milling. NaCl or KCl were used as a solid solvent to initially pre-grind with 1,3,5-benzenetricarboxylic acid (H3BTC) and copper acetate monhydrate, respectively, for 1 minute, then both mixtures were combined together for a further 20 minutes of grinding, and the resultant mixture was finally washed with ethanol and water to obtain the hierarchically micro-, meso- and macroporous HKUST-1 with a high yield...
March 21, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Hyun-Chul Kim, Seong Huh, Do Nam Lee, Youngmee Kim
Lewis basic heteroatoms orderly located inside the well-defined channels of metal-organic frameworks (MOFs) are potentially ideal active sites for selective gas sorption and catalysis. To develop functional MOFs with Lewis basic sites inside channels, a new C2h-symmetric dicarboxylate-based bridging ligand, 3,3'-(pyrazine-2,5-diyl)dibenzoic acid (3,3'-PDBA), was prepared by a Suzuki coupling reaction. Subsequently, two new Zn-MOFs containing the C2h-symmetric 3,3'-PDBA bridging ligand and two different bis(pyridyl)-based pillars, 1,2-bis(4-pyridyl)ethane (bpa) or 1,2-bis(4-pyridyl)ethylene (bpe), were prepared through a thermal reaction in N,N-dimethylformamide (DMF)...
March 21, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Min Liu, Xu-Feng Yang, Hai-Bin Zhu, Bao-Sheng Di, Yue Zhao
A Keggin-type polyoxometalate (POM)-templated metal-organic framework, [Cd(TTPB-4)(DMF)3]4[PMo12O40]2[HPMo12O40]·6DMF·4H2O (1), based on a newly designed linker of TTPB-4 [TTPB-4 = 1,3,5-tris(4-(4H-1,2,4-triazol-4-yl)phenyl)benzene], has been hydrothermally synthesized and characterized using IR, XRD, TGA, UV-Vis and photoluminescence spectra. Single-crystal X-ray crystallography reveals that 1 represents a unique POM-templated four-fold interpenetrated 3-D coordination network. The POM-templated MOF of 1 exhibits strong chemical stability that can withstand aqueous solutions of various pH-values (2-10)...
March 21, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Xuechuan Gao, Ruixue Cui, Guanfeng Ji, Zhiliang Liu
Benefiting from their porous structures, metal-organic frameworks (MOFs) have attracted intensive attention for use in drug release. However, the controllable synthesis of MOFs with proper particle sizes is still very challenging, which largely limits its applications. Here, UIO-66-NH2 with controlled particle sizes in the range of 20-200 nm has been achieved successfully. The amine on UIO-66-NH2 is demonstrated for the feasible post-modifying of UIO-66-NH2 to obtain multifunctional MOFs, overcoming the limitations of functional simplicity and broadening the range of applications...
March 21, 2018: Nanoscale
Peitao Xiao, Fanxing Bu, Ranran Zhao, Mohamed F Aly Aboud, Imran Shakir, Yuxi Xu
Synthesis of ultrasmall metal-organic frameworks (MOFs) nanoparticles has been widely recognized as a promising route to greatly enhance their properties but remains a considerable challenge. Herein, we report one facile and effective spatial-confined thermal pulverization strategy to successfully transform bulk Co-MOFs particles into sub-5 nm nanocrystals encapsulated within N-doped carbon/graphene (NC/G) by using conducting polymer coated Co-MOFs/graphene oxide as precursors. This strategy involves a feasible mechanism: calcination of Co-MOFs at proper temperature in air induces the partial thermal collapse/distortion of the framework, while the uniform coating of conducting polymer can significantly improve the decomposition temperature and maintain the component stability of Co-MOFs, thus leading to the pulverization of bulk Co-MOFs particles into ultrasmall nanocrystals without oxidation...
March 20, 2018: ACS Nano
Huang Zhou, Daping He, Amiinu Ibrahim Saana, Jinlong Yang, Zhe Wang, Jian Zhang, Qirui Liang, Shuai Yuan, Jiawei Zhu, Shichun Mu
Carbon materials, with a controllable structure, derived from metal-organic frameworks (MOFs) have emerged as a new class of electrocatalysts in renewable energy devices. However, efficient conversion of MOFs to small diameter doped carbon nanotubes in inert gases at high temperatures (>600 °C) remains a significant challenge. In this study, we first report the growth of small diameter cobalt and nitrogen co-doped carbon nanotubes (Co/N-CNTs) from mesoporous silica (mSiO2)-coated Co-based MOFs (ZIF-67)...
March 20, 2018: Nanoscale
Cheng-Hui Zeng, Hao-Ran Li, Zi-Qi Liu, Fei Chen, Shengliang Zhong
In this data article, we present the structural and PARD data of the Ln-MOFs. Detailed structure, luminescence and sensing properties were discussed in our previous study (Zeng et al., in press) [1] The data includes the SBU structure patterns of these Ln-MOFs, thermostability of Ln-MOFs in water and also detailed structure information listed in Table 1, Table 2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8.
April 2018: Data in Brief
Reza Abazari, Ali Reza Mahjoub, Soheila Molaie, Fatemeh Ghaffarifar, Ezatollah Ghasemi, Alexandra M Z Slawin, Cameron L Carpenter-Warren
In this work, a magnetic bio-metal-organic framework (MBMOF) nanocomposite with porous-layer open morphology is synthesized through a simple sonochemical approach and its effects on Leishmania major (MRHO/IR/75/ER) under both in vitro and in vivo conditions are investigated. The effects of sonication time, initial concentration of reagents and sonication power on size and morphology of MBMOF nanocomposites have been investigated and optimized. A comparison was then made between the structural information of the nanostructures and that of the bio-metal-organic framework crystals...
May 2018: Ultrasonics Sonochemistry
Oliver Kamp, Oliver Jansen, Rolf Lefering, Renate Meindl, Christian Waydhas, Thomas A Schildhauer, Ume Hamsen
BACKGROUND: Sepsis and multiple organ failure (MOF) remain one of the main causes of death after multiple trauma. Trauma- and infection-associated immune reactions play an important role in the pathomechanism of MOF, but the exact pathways remain unknown. Spinal cord injury (SCI) may lead to an altered immune response, and some studies suggest a prognostic advantage for such patients having sepsis or multiple trauma. Yet these findings need to be evaluated in larger cohorts of trauma patients...
January 1, 2018: Journal of Intensive Care Medicine
Songjian Zhao, Jian Mei, Haomiao Xu, Wei Liu, Zan Qu, Yong Cui, Naiqiang Yan
Metal-organic frameworks (MOFs) adsorbent Mil-101(Cr) was introduced for the removal of elemental mercury from sintering flue gas. Physical and chemical characterization of the adsorbents showed that MIL-101(Cr) had the largest BET surface area, high thermal stability and oxidation capacity. Hg0 removal performance analysis indicated that the Hg0 removal efficiency of MIL-101(Cr) increased with the increasing temperature and oxygen content. Besides, MIL-101(Cr) had the highest Hg0 removal performance compared with Cu-BTC, UiO-66 and activated carbon, which can reach about 88% at 250 °C...
December 7, 2017: Journal of Hazardous Materials
Shaobo Li, Madushani Dharmarwardana, Raymond P Welch, Candace E Benjamin, Alexandra Shamir, Steven O Nielsen, Jeremiah J Gassensmith
Biomimetic mineralization with metal-organic frameworks (MOF), typically zeolitic imidazolate framework-8 (ZIF-8), is an emerging strategy to protect sensitive biological substances against denaturing environmental stressors like heat and proteolytic agents. Additionally, this same biomimetic mineralization process has the potential of being used to create distinct core-shell architectures using genetically or chemically modified viral nanoparticles. Despite the proliferation of examples for ZIF-8 growth on biological or proteinaceous substrates, systematic studies of these processes are few and far between...
March 19, 2018: ACS Applied Materials & Interfaces
Chong Chen, Nengjie Feng, Qirui Guo, Zhong Li, Xue Li, Jing Ding, Lei Wang, Hui Wan, Guofeng Guan
Targeting CO2 capture application, a new strategy for building multiple adsorption sites in metal-organic framework MIL-101(Cr) was constructed through the incorporation of diethylenetriamine-based ionic liquid (DETA-Ac) via a post-synthetic modification approach. The DETA-Ac, with multi-amine-tethered cation and acetate anion, could not only provide additional binding sites, but also enhance the affinity of framework surfaces toward CO2 . Simultaneously, the high surface area and large cage size of MIL-101(Cr) ensured the better dispersion of IL, thus exposing more active sites for CO2 adsorption...
March 12, 2018: Journal of Colloid and Interface Science
Qingfeng Yang, Yue Wang, Jing Wang, Fangbing Liu, Na Hu, Hanna Pei, Weixia Yang, Zhonghong Li, Yourui Suo, Jianlong Wang
UiO-67, a bifunctional adsorbent, was successfully applied to remove illegal food dyes (Congo red and Malachite green) from aqueous solution. The relevant adsorption conditions were optimized: pH 6, 120 min for contact time, and 10.0 mg L-1 adsorbent dose for Congo red. Adsorption behavior of UiO-67 exhibits a better fitting to pseudo-second-order kinetic model and Langmuir model. Moreover, the maximum adsorption capacities of Congo red (1236.9 mg g-1 ) and Malachite green (357.3 mg g-1 ) are higher than that of the most reported adsorbents...
July 15, 2018: Food Chemistry
Ekaterina A Dolgopolova, Allison M Rice, Corey R Martin, Natalia B Shustova
In this review, we highlight how recent advances achieved in the fields of photochemistry and photophysics of metal-organic frameworks (MOFs) could be applied towards the engineering of next generation MOF-based sensing devices. In addition to high surface area and structural tunability, which are crucial for efficient sensor development, progress in the field of MOF-based sensors could rely on the combination of MOF light-harvesting ability, understanding energy transfer processes within a framework, and application of MOF-based photocatalysis towards sensing enhancement...
March 16, 2018: Chemical Society Reviews
Junjie Zhao, Berc Kalanyan, Heather F Barton, Brent A Sperling, Gregory N Parsons
In situ chemical measurements of solution/surface reactions during metal-organic framework (MOF) thin film growth can provide valuable information about the mechanistic and kinetic aspects of key reaction steps, and allow control over crystal quality and material properties. Here, we report a new approach to study the growth of MOF thin films in a flow cell using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Real-time spectra recorded during continuous flow synthesis were used to investigate the mechanism and kinetics that govern the formation of (Zn, Cu) hydroxy double salts (HDSs) from ZnO thin films and the subsequent conversion of HDS to HKUST-1...
October 24, 2017: Chemistry of Materials: a Publication of the American Chemical Society
Jia Wen, Ying Fang, Guangming Zeng
The efficient removal of heavy metals (HMs) from the environment has become an important issue from both biological and environmental perspectives. Recently, porous metal-organic frameworks (MOFs), combining central metals and organic ligands, have been proposed as promising materials in the capture of various toxic substances, including HMs, due to their unique characteristics. Here we review recent progress in the field of water remediation from the perspective of primary HMs (including divalent metals and variable-valent metals) in water pollution and the corresponding MOFs (including virgin and modified MOFs, magnetic MOFs composites and so on) that can remove these metals from water...
March 6, 2018: Chemosphere
Duong Tung Pham, Joseph Paul Baboo, Jinju Song, Sungjin Kim, Jeonggeun Jo, Vinod Mathew, Muhammad Hilmy Alfaruqi, Balaji Sambandam, Jaekook Kim
Pyrite (FeS2 ) is a promising electrode material for lithium ion batteries (LIBs) because of its high natural availability, low toxicity, cost-effectiveness, high theoretical capacity (894 mA h g-1 ) and high theoretical specific energy density (1270 W h kg-1 , 4e- /FeS2 ). Nevertheless, the use of FeS2 in electrochemical capacitors was restricted due to fast capacity fading as a result of polysulfide (S/Sn 2- ) formation during the initial electrochemical cycling. In order to avoid the formation of polysulfides, we employed the strategy of utilizing an ether based electrolyte (1...
March 15, 2018: Nanoscale
Erika Virmani, Julian M Rotter, Andre Mähringer, Tobias von Zons, Adelheid Godt, Thomas Bein, Stefan Wuttke, Dana D Medina
Controlled on-surface film growth of porous and crystalline frameworks is a central requisite for incorporating these materials into functional platforms and operational devices. Here, we present the synthesis of thin zirconium-based metal-organic framework (MOF) films by vapor-assisted conversion (VAC). We established protocols adequate for the growth of UiO-66, UiO-66(NH2 ), UiO-67, and UiO-68(NH2 ) as well as the porous interpenetrated Zr-organic framework (PPPP-PIZOF-1) as highly oriented thin films. Through the VAC approach, precursors in a cast solution layer on a bare gold substrate are reacting to form a porous continuous MOF film, oriented along the [111] crystal axis by an exposure to a solvent vapor under elevated temperatures of 100 °C and 3 h reaction times...
March 15, 2018: Journal of the American Chemical Society
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