Aashis S. Roy, Ameena Parveen, Ambika Prasad and Koppalkar R. Anilkumar
The purpose of this paper is to study the sensitivity and selectivity properties of polyaniline/tantalum pentoxide (PANI/Ta2O5) composite to liquid petroleum gas (LPG).
Abstract
Purpose
The purpose of this paper is to study the sensitivity and selectivity properties of polyaniline/tantalum pentoxide (PANI/Ta2O5) composite to liquid petroleum gas (LPG).
Design/methodology/approach
Polyaniline/tantalum pentaoxide (PANI/Ta2O5) composites were synthesized by in situ chemical polymerization method using ammonium persulphate as an oxidizing agent. This is the novel polymerization process for the direct synthesis of emeraldine salt phase of the polymer. The composites were characterized by FTIR, XRD and SEM. Temperature dependence conductivity of the composites shows thermally activated behaviour. Sensitivity and selectivity of the composites are studied.
Findings
The PANI/ Ta2O5 composites of 20 wt% and 30 wt% are showing maximum change in resistance against time when compared to pure PANI and other polyaniline composites when exposed to LPG. The 20 wt % composites show maximum sensitivity of 83% to LPG. The selectivity studies reveals that LPG could be sensed better when compared to oxyacetylene and other test gases.
Practical implications
Selectivity studies have been carried out and the sensor proved to be better than metal oxides sensors.
Social implications
The sensing material is of low cost.
Originality/value
To the best of the authors' knowledge, studies on Ta2O5‐based gas sensor have not been reported previously.
Details
Keywords
Sari Lakkis, Rafic Younes, Yasser Alayli and Mohamad Sawan
This paper aims to give an overview about the state of the art and novel technologies used in gas sensing. It also discusses the miniaturization potential of some of these…
Abstract
Purpose
This paper aims to give an overview about the state of the art and novel technologies used in gas sensing. It also discusses the miniaturization potential of some of these technologies in a comparative way.
Design/methodology/approach
In this article, the authors state the most of the methods used in gas sensing discuss their advantages and disadvantages and at last the authors discuss the ability of their miniaturization comparing between them in terms of their sensing parameters like sensitivity, selectivity and cost.
Findings
In this article, the authors will try to cover most of the important methods used in gas sensing and their recent developments. The authors will also discuss their miniaturization potential trying to find the best candidate among the different types for the aim of miniaturization.
Originality/value
In this article, the authors will review most of the methods used in gas sensing and discuss their miniaturization potential delimiting the research to a certain type of technology or application.