Development of NO2 sensor by fungal-ZnFe2O4 at room temperature
Solleti Goutham, Doriya Kruthi, Deverai Santhosh Kumar and Kalagadda Venkateswara Rao
JNT University Hyderabad, India
Indian Institute of Technology Hyderabad, India
Johns Hopkins University,USA
: J Nanomater Mol Nanotechnol
Abstract
Hybrid nanomaterial (powdered fungi and ZnFe2O4) was developed and studied for gas sensing application, specifically for NO2 gas detection. In this study, powdered Rhizopus species W3 and ZnFe2O4 nano-powder were mixed at equal proportion to carryout sensing experiments. The conjugated material film was coated on the interdigitated electrodes (IDEs) by drop drying method, to determine the NO2 gas sensing characteristics. It was found that the response of these hybrid materials decrease resistance, thereby resembling the p-type semiconductor. The fungi W3 - ZnFe2O4 hybrid composite sensor showed better response, sensitivity, selectivity, stability and reproducibility at room temperature towards 30 ppm of NO2. N. Miura et al. reported in 2002 ZnFe2O4 showed good sensitivity for NO2 (436 ppm) at 700°C operating temperature. Therefore, in this present work effort was made to prepare novel hybrid material that is feasible, eco-friendly, flexible, cost-effective, low maintenance and light weight new device.
Biography
