Synthesis And Performance Ordered Sno2 Using Sba-16 For Detection Of Dangerous Gases
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Date
2022-06-01
Authors
Sahrani, Muhamad Ikhwan Mohd
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Tin oxide (SnO2) based sensor have attracted a lot of interest in the field of dangerous gas
detection due to its sensitivity, fast response, and long-term stability. However, more study is
still needed to improve the sensitivity and performance of SnO2 based sensors. This study
focuses on the synthesis and performance of nanocasted ordered mesoporous SnO2 using the
SBA-16 for the detection of harmful gases like hydrogen gas, H2. Synthesis of the SBA-16 was
carried out using pluronic F-127, hydrochloric acid (HCl) and tetraethylortosilicate (TEOS),
followed by hydrothermal aging treatment at temperature 80°C. The produced ordered
mesoporous SnO2 was compared using two different types of infiltration namely, Conventional
Evaporation Method (CEM) and Solid-Liquid Method (SLM). According to the structural
characteristics discovered using XRD, BET, and SEM analysis, the Conventional Evaporation
Method (CEM) demonstrates much better structure compared to Solid-Liquid Method (SLM).
Following that, MATLAB was used to simulate the performance of the sensor in detecting
dangerous gas, based on the obtained ordered mesoporous SnO2's physical characteristics. The
experimental result indicates that the variations of the sensor sensitivity against the gas
concentration, which is shown as a well-resolved curve as concentration increases the
sensitivity increases until it reach the saturation level. A bell-shaped curve that similar with the
experimental data from the previous research was obtained when comparing the operating
temperature against the sensitivity of the sensor with variable concentration. In conclusion,
sensitivity analyses depending on pore size (r) and film thickness (L) were carried out and it
comes into a result where the pore size (r) has directly relationship with gas sensor sensitivity
and vice versa for film thickness (L).