Photocatalytic Degradation of Phenol Red in Water on Nb(x)/TiO2 Nanocomposites

• Published in: Crystals (Basel) Vol. 12; no. 7; p. 911
• Main Authors: Almulhem, Najla, Awada, Chawki, Shaalan, Nagih M.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.07.2022
• Subjects: Anatase; degradation; kinetics studies; Nanocomposites; Nanoparticles; Nb(x)/TiO2; Niobium; Optical properties; phenol red dye; Phenols; Photocatalysis; Photodegradation; Photoluminescence; Pollutants; Raman spectroscopy; Sol-gel processes; Spectrum analysis; Synergistic effect; TiO2 nanoparticles; Titanium dioxide; Wastewater treatment
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst12070911

In this paper, the photocatalytic effect of Nb(x)/TiO2 nanocomposites on the degradation of phenol red (PR) was studied. Nb(x)/TiO2 nanocomposites are fabricated by a simple sol-gel route with new experimental conditions. The structural and optical properties were determined using high transmission electron microscopy (HRTEM), X-ray diffraction, Raman spectroscopy, photoluminescence, and UV-vis absorbance spectroscopy. Compared to pure anatase TiO2, the recently fabricated Nb(x)/TiO2 nanocomposite has a shift in the optical band edge to the visible wavelength. Consequently, it has high performance in adsorption capacity and photocatalytic activities. A time of 160 min has been observed to be suitable for mostly degradable 20 mgL−1 of phenol red on Nb(2.0)/TiO2 composite. The kinetic results were in good agreement with the first-order kinetic model at different concentrations. In addition, the results showed that the addition of Nb led to a significant degradation process. The decomposition of phenol red pollutants showed a synergistic effect of the Nb(2.0)/TiO2 nanocomposites on wastewater treatment.