The present study discusses the ammonia (NH) sensing characteristics, photocatalytic degradation of emerging pollutants, and peroxidase mimic activity of multifunctional multi-walled carbon nanotube-tungsten oxide nanocomposite (MWCNT/WO) prepared by conventional solvothermal method. The prepared MWCNT/WO nanocomposites were characterized by various analytical techniques like XRD, Raman, XPS, N adsorption, FESEM with elemental analysis and diffuse reflection spectroscopy. The prepared 1% MWCNT/WO nanocomposite showed better gas sensing performance for the NH vapors at 10-100 ppm than the pristine WO and the response and recover time of about 13 and 15s towards 20 ppm of ammonia (NH) was achieved. The photocatalytic activity of MWCNT/WO towards organic dyes such as Rhodamine-B (Rh.B) methylene blue (MB) and pharmaceutical compound ciprofloxacin (CIP) were studied and achieved above 90% degradation at 160 min for CIP and 60 min for MB and Rho-B respectively. The radicle scavenging activity for MWCNT/WO nanocomposite showed the predominant formation of hydroxyl (OH) and superoxide radicle (O). Further, the MWCNT/WO nanocomposite showed peroxidase mimic activity and exhibit the limit of detection (LOD) of about 321 nM. From the overall analysis, MWCNT/WO hybrid seems to have potential characteristics that can be explored for multiple functional applications.
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