Details

Autor(en) / Beteiligte

• Mamatha, K.M.
• Srinivasa Murthy, V.
• Thammanna, B.M.
• Naveen Kumar, T.
• Jahagirdar, A.A.
• Naveen Kumar, A.
• Muniyappa, Murthy
• Ravikumar, C.R.
• Ananda Murthy, H.C.

Titel

Electrochemical sensor of carboxymethyl cellulose and photocatalytic degradation of Navy Blue dye by sonochemically synthesized Titanium oxide nanoparticles

Ist Teil von

• Sensors international, 2023, Vol.4, p.100239, Article 100239

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• Nanocrystalline titanium oxide nanoparticles (TiO2 NPs) were synthesized by using a low-cost sonochemical method. TiO2 NPs exhibited anatase phase and an average crystallite size of 40.64 ​nm, according to a powder X-ray diffraction (PXRD) investigation. SEM and TEM images revealed spherical shape, with asymmetric geometries for TiO2 NPs. The micrographs thoroughly corroborated the plate-like structure for the NPs. In order to confirm the average energy gap of TiO2 NPs, diffused reflectance spectroscopy (DRS) via Kubelka-Monk function was applied (3.66 ​eV). Navy blue dye was used to study the photocatalytic properties of NPs and discovered to be triggered at 590.9 ​nm. The photodegradation rate of NB dye decolorized up to 74.04% after 120 ​min of UV light exposure. The first order kinetics was indicated by a linear relationship between log C/Co and k. The demonstrated rates of photodecoloration for NB under UV light in the presence of scavengers AgNO3, ethanol, and ethylenediamine tetraacetic acid (EDTA), were found to be 65.50%, 61.46%, and 57.33%, respectively. Using the carbon paste electrodes and cyclic voltammetry (CV) in 0.1 ​N HCl solution, the electrochemical characteristics of the obtained sample were studied. The carboxymethyl cellulose sensor made from TiO2 NPs demonstrated a remarkable sensitivity of 0.08 A. The results showed a high recovery for lead with low% of RSD values. The TiO2 electrode is a promising electrode material for sensing applications due to its outstanding electrochemical performance. Schematic representation of the work carried out. [Display omitted] •Synthesis of titanium oxide NPs (TiO2 NPs) by a probe sonication route.•TiO2 NPs have an average crystallite size of 40.64 ​nm.•TiO2 NPs exhibited effective photocatalytic behavior for navy blue (NB) dye.•Modified electrode with TiO2 NPs revealed superior electrochemical sensing for carboxymethyl cellulose.