Removal of Methylene Blue by Activated Glass Foams with TiO2 in Dark and Simulated Solar Light

Florina Stefania Rus; Stefan Danica Novaconi; Paulina Vlazan; Madalina Ivanovici

doi:10.2478/awutp-2019-0003

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Removal of Methylene Blue by Activated Glass Foams with TiO2 in Dark and Simulated Solar Light

Annals of West University of Timisoara - Physics

Volume 61 (2019): Issue 1 (December 2019)

By: Florina Stefania Rus, Stefan Danica Novaconi, Paulina Vlazan and Madalina Ivanovici

Open Access

|Jan 2020

Abstract

The effect of germanium trapezoidal profile shape on the direct current (DC) current gain (βF), cut-off frequency (fT) and maximum oscillation frequency (fMAX) of silicon-germanium (SiGe) hetero-junction bipolar transistors (HBTs) has been investigated. The energy balance (EB), hydrodynamic (HD) and drift-diffusion (DD) physical transport models in SILVACO technology computer aided design (T-CAD) simulator were used. It was found that the current gain values using energy balance model are higher than hydrodynamic and much higher than those corresponding to drift-diffusion. Moreover, decreasing the germanium gradient slope towards the collector side of the base enhances the maximum oscillation frequencies using HD and EB models whilst, they remain stable for DD model.

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Articles in this issue

DOI: https://doi.org/10.2478/awutp-2019-0003 | Journal eISSN: 2784-1057 | Journal ISSN: 1224-9718

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Language: English

Page range: 33 - 43

Submitted on: Aug 25, 2019

Accepted on: Nov 29, 2019

Published on: Jan 21, 2020

Published by: West University of Timisoara

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

environment friendly,

anatase,

foam glass,

building materials,

photocatalytic activity

Related subjects:

Materials sciences,

Modeling and simulations,

Physics,

Condensed matter physics,

Medical physics,

Theoretical and mathematical physics

© 2020 Florina Stefania Rus, Stefan Danica Novaconi, Paulina Vlazan, Madalina Ivanovici, published by West University of Timisoara
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 61 (2019): Issue 1 (December 2019)