Boosted Sensor Performance by Surface Modification of Bifunctional <i>rht</i>-Type Metal–Organic Framework with Nanosized Electrochemically Reduced Graphene Oxide

Liu, Cong; Zhang, Tingting; Zhao, Jingyu; Li, He; Zheng, Bo; Gu, Yue; Yan, Xin; Li, Yaru; Lu, Nannan; Zhang, Zhiquan; Feng, Guodong

doi:10.1021/acsami.6b13788

Cited by 73 publications

(26 citation statements)

References 59 publications

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controlled to obtain efficient activities; otherwise the porous structures might collapse, and the active centers might be hindered. [10][11][12][13][14] Such catalysts should be further explored to fulfill the requirements of cell optimizations and applications.Combining MOFs with carbon materials, such as graphene or carbon nanotubes to enhance performance has been widely studied in the fields of sensing, [15,16] separation, [17] catalysis, [18] supercapacitor, [19] etc. On the other hand, the mechanisms to provide high activities are convoluted due to the diversity of potential functional centers in such materials.

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confidence: 99%

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Modifying Commercial Carbon with Trace Amounts of ZIF to Prepare Derivatives with Superior ORR Activities

Chen

et al. 2017

Advanced Materials

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Reducing costs while maintaining high activities and stabilities of oxygen reduction reaction (ORR) catalysts has long been pursued for applications to membrane fuel cells. Here, an absorption-reaction method is used to prepare a zeolitic imidazolate framework coated commercial carbon, and the pyrolysis of such material brings about impressive ORR activities and stabilities with large diffusion-limited current density, half-wave potential, and no obvious decay after 10 000 cyclic voltammetry cycles, which is even better than that of the commercial Pt/C catalysts. The absorption-reaction method is realized by simply soaking the commercial carbon black sequentially in Co(NO ) and 2-methylimidazole solutions at ambient conditions. The detailed analysis on such carbon materials reveals that both Co and N are essential to activities, even the amount of N and Co species is very low. The reduction of raw materials and simplified handling procedures result in well-controlled costs in applications.

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confidence: 99%

“…Combining MOFs with carbon materials, such as graphene or carbon nanotubes to enhance performance has been widely studied in the fields of sensing, [15,16] separation, [17] catalysis, [18] supercapacitor, [19] etc. The pyrolysis of such materials could also contribute to good electrochemical activities.…”

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confidence: 99%

Modifying Commercial Carbon with Trace Amounts of ZIF to Prepare Derivatives with Superior ORR Activities

Chen

et al. 2017

Advanced Materials

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“…With the enhanced synthesis methods, the composites possessed superb properties and are more practical in applications. Because of the awesome physical and chemical properties of graphene‐based materials, the drawbacks of MOFs such as low stability, inferior electronic conductivity, and poor recyclability are overcome, and the special 2‐ or 3D structures of graphene‐based materials also boost the abilities of the composites . Unlike single MOFs or graphene‐based materials, the composites have not only large surface areas and porous structure, but also excellent electrochemistry performance, which indicate that they may achieve the surprising effect that parent materials can never realize.…”

Section: Chemical Sensorsmentioning

confidence: 99%

Metal‐Organic Frameworks/Graphene‐Based Materials: Preparations and Applications

Zheng

Xue

et al. 2018

Adv Funct Materials

253

107

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Metal-organic frameworks (MOFs), a new class of crystalline porous materials, can be applied in many fields as adsorbents, supercapacitors, catalysts, and so on because of, among others, their superior properties of large surface area, tunable pore size, diverse structures. However, the low stability and selectivity of traditional MOFs indicate that they are not the best configuration for the applications outlined above. In this case, a type of composite made from an assembly of graphene-based materials and MOFs that exhibits the advantages of the parent materials has attracted widespread attention in recent years. This review provides an overview of the recent developments of MOF/graphene-based materials, focusing on their applications in gas separation/storage, water purification, chemical sensors, batteries, supercapacitors, and catalysts, as well as their preparation methods.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201804950. traditional method, they can be excellent alternatives of single MOFs to overcome the above-mentioned difficulties. [34][35][36][37][38] Graphene-based materials have recently introduced new possible applications because of their unique structure and low toxicity, as well as their excellent electronic, thermal, electrochemical, and mechanical properties. [39] More recently, many reports have confirmed that the introduction of graphene-based materials into other materials can lead to surprising improvements in electronic conductivity and stability. [38,40] Under these circumstances, it is reasonable to consider whether composites made from the assembly of graphene-based materials and MOFs possess extraordinary characteristics given that the parent materials have complementary properties. [40][41][42] Naturally, the idea of hybridizing graphene derivatives with MOFs materialized and soon attracted widespread attention. [43][44][45] According to recent research, composites of MOF/graphene-based materials can integrate the advantages and mitigate the shortcomings of the individual components perfectly, enabling the composites to possess improved stability, enhanced electrical conductivity, high selectivity, and template effects. [34,[46][47][48][49] With the combination of MOF and graphene-based materials, the unexpected interactions take place and bring unique performance in many applications. Thanks to the ionic groups and the aromatic sp 2 domains, graphene-based materials can not only function as structural nodes, but also participate in bonding interactions, which would be more active in MOFs. What's more, carboxylate and pyridine groups of graphene-based materials play important part in the assemble, which could enhance the coordination bonding and guide the growth of MOF, providing a more beneficial structure. These special interactions are unique in MOF/graphenebased materials, which indicates that this kind of materials deserve more attention. As concluded in Scheme 1, the addition of graphene-based material...

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“…is study sought to hierarchically fabricate porous metal-organic monoliths consisting of organic struts and metal clusters/ ions, which integrate the advantages of lights aerogels and crystalline MOFs [68][69][70][71]. Figure 1 shows the major steps for fabricating CuBTC-monopol monolithic rods.…”

Section: Fabrication Of Metal-organic Monolithmentioning

confidence: 99%

Polycarbonate Microchip Containing CuBTC-Monopol Monolith for Solid-Phase Extraction of Dyes

Alzahrani

2020

International Journal of Analytical Chemistry

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In the present study, preparation of CuBTC-monopol monoliths for use within the microchip solid phase extraction was undertaken through a 20-min UV lamp-assisted polymerization for 2,2-dimethoxy-2-phenyl acetophenone (DMPA), butyl methacrylate (BMA), and ethylene dimethacrylate (EDMA) alongside inclusion of the porogenic solvent system (1-propanol and methanol (1 : 1)). The resultant coating underwent coating using CuBTC nanocrystals in ethanolic solution of ethanolic solution of 1,3,5-benzenetricarboxylic acid (H3BTC, 10 mM) and 10 mM copper(II) acetate Cu(CH3COO)2. This paper reports enhanced extraction, characterization, and synthesis studies for porous CuBTC metal organic frameworks that are marked by different methods including SEM/EDAX analysis, atomic force microscopy (AFM), and Fourier-transform infrared spectroscopy (FT-IR). The evaluation of the microchip’s performance was undertaken as sorbent through retrieval of six toxic dyes (anionic and cationic dyes). Various parameters (desorption and extraction step flow rates, volume of desorption solvent, volume of sample, and type of desorption solvent) were examined to optimize dye extraction using fabricated microchips. The result indicated that CuBTC-monopol monoliths were permeable with the ability of removing impurities and attained high toxic dye extraction recovery (83.4–99.9%). The assessment of reproducibility for chip-to-chip was undertaken by computing the relative standard deviations (RSDs) of the six dyes in extraction. The interbatch and intrabatch RSDs ranged between 3.8 and 6.9% and 2.3 and 4.8%. Such features showed that fabricated CuBTC-monopol monolithic disk polycarbonate microchips have the potential of extracting toxic dyes that could be utilized for treating wastewater.

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Boosted Sensor Performance by Surface Modification of Bifunctional rht-Type Metal–Organic Framework with Nanosized Electrochemically Reduced Graphene Oxide

Cited by 73 publications

References 59 publications

Modifying Commercial Carbon with Trace Amounts of ZIF to Prepare Derivatives with Superior ORR Activities

Modifying Commercial Carbon with Trace Amounts of ZIF to Prepare Derivatives with Superior ORR Activities

Metal‐Organic Frameworks/Graphene‐Based Materials: Preparations and Applications

Polycarbonate Microchip Containing CuBTC-Monopol Monolith for Solid-Phase Extraction of Dyes

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