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Highly effective and stable MWCNT/WO 3 nanocatalyst for ammonia gas sensing, photodegradation of ciprofloxacin and peroxidase mimic activity
Ist Teil von
Chemosphere (Oxford), 2022-06, Vol.297, p.134023
Ort / Verlag
England
Erscheinungsjahr
2022
Quelle
MEDLINE
Beschreibungen/Notizen
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.