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Lecture

WEB Effect of morphology on the electrical properties of Bi2O3 synthesized by a facile co-precipitation route

Wednesday (23.09.2020)
15:55 - 16:10 F: Functional Materials, Surfaces, and Devices 1
Part of:


Bismuth oxide (Bi2O3) is an interesting metal oxide semiconductor. It has been receiving considerable attention because it exhibits excellent optical and electrical properties such as its wide band-gap energy. Recently, many studies have shown that the arrangement of materials influence their performances toward various applications, the control of the elaboration conditions leads to controllable morphologies which leads to novel functionalities. For this purpose, the 3D architectures by self-assembly is attracting more interest due to the various obtained materials morphologies.

The purpose of this study is to investigate the effect of the architecture via the self-assembly phenomenon and its effect on the physical properties of Bi2O3. The different morphologies of bismuth oxide were synthesized using bismuth oxalate precursor by a classical co-precipitation method from bismuth nitrate and oxalic acid solution under controlled pH, followed by a calcination process at different temperatures. By changing pH of the synthesis solution, controllable synthesis of bismuth oxalate with different morphologies was obtained. The samples were characterized by X-ray diffraction, simultaneous thermo-gravimetric and differential thermal analysis (TGA/DTA) and scanning electron microscopy (SEM). The electrical properties of Bi2O3 compacted pellets systems were investigated by electrical impedance spectrometry (EIS) under air in the range of 25°C to 650°C. Herein, we conclude that the synthesis conditions influence the morphology of the prepared materials which also influence their electrical properties and their phase transition temperatures.

 

Speaker:
Ph.D. Mohamed Anass Baabou
University of Toulon
Additional Authors:
  • Prof. Marie-Angèle FR2MY
    University of Toulon
  • Prof. Sylvie VILLAIN
    University of Toulon
  • Prof. Claude FAVOTTO
    University of Toulon

Dateien

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Presentation version 1 The purpose of this study is to investigate the effect of the architecture via the self-assembly phenomenon and its effect on the physical properties of Bi2O3. The different morphologies of bismuth oxide were synthesized using bismuth oxalate precursor by a classical co-precipitation method from bismuth nitrate and oxalic acid solution under controlled pH, followed by a calcination process at different temperatures. By changing pH of the synthesis solution, controllable synthesis of bismuth oxalate with different morphologies was obtained. The samples were characterized by X-ray diffraction, simultaneous thermo-gravimetric and differential thermal analysis (TGA/DTA) and scanning electron microscopy (SEM). The electrical properties of Bi2O3 compacted pellets systems were investigated by electrical impedance spectrometry (EIS) under air in the range of 25°C to 650°C. Herein, we conclude that the synthesis conditions influence the morphology of the prepared materials which also influence their electrical properties and their phase transition temperatures. 634 KB Download