Synthesis of graphene oxide/metal–organic frameworks hybrid materials for enhanced removal of Methylene blue in acidic and alkaline solutions

2017 ◽  
Vol 93 (3) ◽  
pp. 698-709 ◽  
Author(s):  
Shuaiqi Zhao ◽  
Ding Chen ◽  
Fuhua Wei ◽  
Nini Chen ◽  
Zhao Liang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Hybrid Materials ◽  
Metal Organic Frameworks ◽  
Alkaline Solutions ◽  
Metal Organic

scholarly journals Enhancing microperoxidase activity and selectivity: immobilization in metal-organic frameworks

2019 ◽  
Vol 23 (07n08) ◽  
pp. 718-728 ◽  
Author(s):  
Effrosyni Gkaniatsou ◽  
Christian Serre ◽  
Jean-Pierre Mahy ◽  
Nathalie Steunou ◽  
Rémy Ricoux ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Metal Organic Frameworks ◽  
Environmental Pollutants ◽  
Reaction Medium ◽  
Alkaline Solutions ◽  
Phenol Derivatives ◽  
Low Concentrations ◽  
Lack Of Control ◽  
Metal Organic ◽  
Acidic Conditions

Microperoxidases 8 (MP8) and 11 (MP11) are heme-containing peptides obtained by the proteolytic digestion of Cytochrome c. They act as mini-enzymes that combine both peroxidase-like and Cytochrome P450-like activities that may be useful in the synthesis of fine chemicals or in the degradation of environmental pollutants. However, their use is limited by their instability in solution due to (i) the bleaching of the heme in the presence of an excess of H2O2, (ii) the decoordination of the distal histidine ligand of the iron under acidic conditions and, (iii) their tendency to aggregate in aqueous alkaline solutions, even at low concentrations. Additionally, both MP8 and MP11 show relatively low selectivity, due to the lack of control of the substrates by a specific catalytic pocket on the distal face of the heme. Both stability and selectivity issues can be effectively addressed by immobilization of microperoxidases in solid matrices, which can also lead to their possible recycling from the reaction medium. Considering their relatively small size, the pore inclusion of MPs into Metal-Organic Frameworks appeared to be more adequate compared to other immobilization methods that have been widely investigated for decades. The present minireview describes the catalytic activities of MP8 and MP11, their limitations, and various results describing their immobilization into MOFs which led to MP11- or MP8@MOF hybrid materials that display good activity in the oxidation of dyes and phenol derivatives, with remarkable recyclability due to the stabilization of the MPs inside the MOF cavities. An example of selective oxidation of dyes according to their charge by MP8@MOF hybrid materials is also highlighted.

Cu2O/CuO@rGO heterostructure derived from metal–organic-frameworks as an advanced electrocatalyst for non-enzymatic electrochemical H2O2 sensor

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103116-103123 ◽  
Author(s):  
Duoming Wu ◽  
Zhaodong Xu ◽  
Ting Zhang ◽  
Yubo Shao ◽  
Pinxian Xi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Metal Organic Frameworks ◽  
Nitrogen Atmosphere ◽  
H2o2 Sensor ◽  
Reduced Graphene ◽  
Sensitivity And Selectivity ◽  
Metal Organic

A hybrid heterostructure comprising well-dispersed Cu2O/CuO particles and reduced graphene oxide (rGO) is synthesized by calcinating a mixture of MOFs-118 and GO in nitrogen atmosphere to improve the sensitivity and selectivity of H2O2 sensors.

scholarly journals Metal–Organic Framework Hybrid Materials and Their Applications

Crystals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 325 ◽  
Author(s):  
Joshua Sosa ◽  
Timothy Bennett ◽  
Katherine Nelms ◽  
Brandon Liu ◽  
Roberto Tovar ◽  
...  
Keyword(s):  
Small Molecules ◽  
Hybrid Materials ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
Superior Performance ◽  
Separation Energy ◽  
New Materials ◽  
Metal Organic ◽  
Covalent Modifications

The inherent porous nature and facile tunability of metal–organic frameworks (MOFs) make them ideal candidates for use in multiple fields. MOF hybrid materials are derived from existing MOFs hybridized with other materials or small molecules using a variety of techniques. This led to superior performance of the new materials by combining the advantages of MOF components and others. In this review, we discuss several hybridization methods for the preparation of various MOF hybrids with representative examples from the literature. These methods include covalent modifications, noncovalent modifications, and using MOFs as templates or precursors. We also review the applications of the MOF hybrids in the fields of catalysis, drug delivery, gas storage and separation, energy storage, sensing, and others.

scholarly journals A Sm-MOF/GO nanocomposite membrane for efficient organic dye removal from wastewater

RSC Advances ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 8540-8547 ◽  
Author(s):  
Guohai Yang ◽  
Daqing Zhang ◽  
Gen Zhu ◽  
Tingrong Zhou ◽  
Manting Song ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Dye Removal ◽  
Metal Organic Frameworks ◽  
Organic Dye ◽  
Nanocomposite Membrane ◽  
Graphene Oxide Nanosheets ◽  
Metal Organic

A nanocomposite membrane composed of samarium metal-organic frameworks and graphene oxide nanosheets was fabricated for organic dye removal.

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