Record Details

ZnO: SnO2 nanocomposite efficacy for gas sensing and microbial applications

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field 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 350C 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]