ZnO: SnO2 nanocomposite efficacy for gas sensing and microbial applications
NOPR - NISCAIR Online Periodicals Repository
View Archive InfoField | Value | |
Title |
ZnO: SnO2 nanocomposite efficacy for gas sensing and microbial applications
|
|
Creator |
Arasavalli, Nagamalli
Alli, Daisy Rani Babu, BK Ravichandra, Gurrala Mokshagni, K Sai |
|
Subject |
Breath biomarkers
Semi-conductor metal oxide (SMO) sensors Sol-gel VOC gas sensors |
|
Description |
586-594
The unique characteristics of 2-dimensional hetero structure offers efficient gas sensing with high selectivity to identify gases from the interference gases which is quite difficult. In the present work, ZnO: SnO2Nano composite clusters (NCC) is prepared. A resistive metal oxide volatile organic compound (VOC) gas sensor is fabricated with nullifying the effect of humidity by increasing temperature optimally. A single-step SOL-GEL (SG) synthesis is used to prepare ZnO: SnO2 NCC with maximum Zn/Sn molar concentration ratio of 3. The morphological studies through Scanning Electron Microscopy (SEM), electrical properties due to oxygen vacancies and energy band variations of Nanocomposite are measured. The enhancement of gas sensor sensitivity due to highly mesoporous nature of the composite is observed. From the findings, the abundant mesopores in the range of 2 nm-14 nm and specific surface area of 54.2 m2 g−1 with the average crystal size of 14.236 nm, and polar surface area of the composite 25.9651Åis achieved. When compared to bare ZnO and SnO2 gas sensors, the present gas sensor offers the higher selectivity with enhanced performance due to the mesoporous structure. Fast repeatability rate of 2200 sec at 350C to ethanol is attained and the overall selectivity of the sensor increased twice as 2.085. The NCC compound is tested firstly with micro organisms such as B. subtilis (B. S), Bacillus cereus (B. C), B.coagulans (B. C), Pseudonymous auriginosa (P. A) are considered for antimicrobial activity. From the findings, zincstannate compound showed good efficacy towards B. cereus Gram positive and P.A gram-negative. A bacterial growth isarrested highly with B. cereus. |
|
Date |
2022-05-26T11:24:50Z
2022-05-26T11:24:50Z 2022-05 |
|
Type |
Article
|
|
Identifier |
0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/59765 |
|
Language |
en
|
|
Publisher |
NIScPR-CSIR, India
|
|
Source |
IJBB Vol.59(5) [May 2022]
|
|