Graphene-Metal Organic Framework Composite Based Electrochemical Sensors for Toxic Chemicals
P. Arul, N.S.K. Gowthaman, S. Abraham John, Hong Ngee Lim, Sheng-Tung Huang, Govindasamy Mani
Metal organic frameworks (MOFs) are a class of porous materials designed by coordination chemistry between metal ions and secondary organic building units (linkers). They emerged as an extensive class of crystalline materials with higher porosity than other framework materials like zeolites, activated carbon and metal-complex hydrides, respectively. Besides, they have high thermal stability, well-organized structure, low density, large internal surface area, ease in synthesis and broad-spectrum properties which makes them suitable for diverse applications. On the other hand, bulky structure of MOFs having some limitations like poor solubility, lacking electronic conductance and surface to volume ratio is minimal. To fulfill the above shortcoming is to introduce properties of other active materials like carbon nanostructure, metal oxide, metal nanoparticles, graphene carbon nitrite so on. Among the different composite materials especially carbon-based nanocomposite like graphene oxide (GO) and its derivatives have gained much attention because GO exhibiting 2D amphiphilic contains huge hydroxyl, epoxy and carboxylic acid functional groups on its conjugated planes. The co-existence of aromatic sp2 feature and oxygen functionalities allow GO in wide bonding interactions. Due to the solubility, sheet with basal like structure of GO can easily functionalized with other active materials. The obtained composite materials could enhance the optical, electrical, thermal and mechanical properties and can then be utilized for electrocatalytic applications. This chapter deals with the introduction of MOF with different synthetic methods and their characterization. Then these composite materials are utilized for electrochemical determination of toxic components including heavy metals, toxic anions, pesticides, aromatic nitro compounds, phenolic compounds and toxic solvents. The described MOF with graphene-based composites are well-known electrocatalyst for determination of toxic compounds.
Keywords
Metal-Organic Frameworks, Graphene Oxide, Electrocatalyst, Electrochemical Sensors, Toxic Components, Aromatic Nitro Compounds
Published online 8/30/2020, 33 pages
Citation: P. Arul, N.S.K. Gowthaman, S. Abraham John, Hong Ngee Lim, Sheng-Tung Huang, Govindasamy Mani, Graphene-Metal Organic Framework Composite Based Electrochemical Sensors for Toxic Chemicals, Materials Research Foundations, Vol. 82, pp 276-308, 2020
DOI: https://doi.org/10.21741/9781644900956-10
Part of the book on Graphene-Based Electrochemical Sensors for Toxic Chemicals
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