Semiconductive Tl2O3 nanoparticles: Facile synthesis in liquid phase, characterization and its applications as photocatalytic substrate and electrochemical sensor

Abstract

For the first time, we reported the facile synthesis of semiconducting thallium oxide nanoparticles using thallium (III) acetate as the starting reagent through the microwave and co-precipitation methods. Results showed that the microwave power, irradiation time and pH value plays an essential role in the control of final products size distribution. According to our knowledge, it is first time that ethylenediamine was used as pH controller agent in synthesis of Tl2O3 nanoparticles. Based on the current research, microwave method provided a simple and rapid method for the synthesis of Tl2O3 nanoparticles than to co-precipitation method, because of its homogeneous and fast-heating characteristics. As application for Tl2O3 nanoparticles, the photocatalytic degradation of methyl orange with maximum decolorization of 74.2% under UV light irradiation based on Tl2O3 nanoparticles was obtained. Also, a pencil graphite electrode was decorated using Tl2O3 nanoparticles and MWCNT to provide an electrochemical devise for Cu +2 ions sensing. This modified electrode showed agreeable responses to trace amounts of Cu +2 in phosphate buffer solutions which the limit of detection was found to be 4.63 nmol L-1 for Cu +2 .

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