TCNQ-based metal organic semiconducting hybrids as phototunable catalyst

Mohammadtaheri,M 2017, TCNQ-based metal organic semiconducting hybrids as phototunable catalyst, Doctor of Philosophy (PhD), Science, RMIT University.

Document type: Thesis
Collection: Theses

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Title TCNQ-based metal organic semiconducting hybrids as phototunable catalyst
Author(s) Mohammadtaheri,M
Year 2017
Abstract The ever-increasing demand to harvest solar light more efficiently has pushed the boundaries of research to develop new materials with superior light absorption properties. Considering that UV irradiation contributes to only 3% of the solar irradiation falling on the earth surface, conventional oxides such as TiO2 (band gap energy of 3.2 eV) absorb <5% of the solar spectrum. This suggests that traditional inorganic semiconductors may require transformational modifications to be suitable for practical applications. This outlines the need fabricate new catalysts with broad absorption capabilities across the UV–Vis–IR range of the solar spectrum. Additionally, easy fabrication and improving the availability of catalytically active sites would also enable rapid translation of such catalysts. For developing such catalysts, appropriate selection of semiconductors is required wherein the bandgap, chemical stability and light absorbing capabilities of each of these semiconductors and/ or metals is essential. The formation of junctions between two semiconductors or a semiconductor/metal has shown tremendous effect in influencing the photocatalytic activities of the semiconductors.

In this regard, the current thesis outlines the fabrication of an organic charge transfer complex based on TCNQ using a simple and facile solution based approach. Combining these materials with either metals or other semiconductors improved their charge transfer properties leading to excellent catalysts. Growing such materials directly on high surface area cotton templates further allowed me to control the population of the junctions
Degree Doctor of Philosophy (PhD)
Institution RMIT University
School, Department or Centre Science
Subjects Catalysis and Mechanisms of Reactions
Synthesis of Materials
Chemical Characterisation of Materials
Keyword(s) Catalysis
Zinc Oxide
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Created: Fri, 27 Oct 2017, 12:50:12 EST by Denise Paciocco
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