Facile Fabrication of C–TiO₂ Nanocomposites with Enhanced Photocatalytic Activity for Degradation of Tetracycline

Abstract

Visible-lightdriven C–TiO2 nanocomposites were prepared via a simple calcination and acid etching process. The C–TiO2 nanocomposites were characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, and high-resolution TEM. The results showed that TiO2 nanoparticles were combined with a porous carbon layer through surface C–O groups, which facilitates the strong interface interaction. The interface combination of nano-TiO2 and carbon material increases the specific surface area of nano-TiO2, widens the range of light response, and improves the efficiency of light-induced electron migration. The visible-light photocatalytic activity of the prepared photocatalyst was evaluated by the decomposition of tetracycline aqueous solution. Compared with that of pure TiO2, the photocatalytic activity of C–TiO2 nanocomposites was significantly improved. Furthermore, a possible photocatalytic mechanism was also tentatively proposed. This work can promote the development of active photocatalysts under solar light for the photodegradation of environmental pollutants.

Fight against COVID-19: The case of antiviral surfaces

“…This includes coupling with narrow bandgap semiconductors or carbonaceous materials as sensitizers. 55 Carbonaceous materials with a specific sp 2 /Sp 3 graphitic structure have been widely studied in many fields, such as catalyst supports, fillers, adsorbents, and battery electrode material, 56–66 and demonstrated its potential to reduce the TiO 2 bandgap and shift within the visible range while maintaining the photocatalytic performance. This presents a great opportunity to use carbon synthesized from sustainable resources that have direct impact on the cost effectiveness of the system.…”

Evaluation of polymeric g-C3N4 contained nonhierarchical ZnV2O6 composite for energy-efficient LED assisted photocatalytic mineralization of organic pollutant

“…Primarily, the deprotonation reaction occurs that split the parent chain. Further, the fragmentation will be initiated by three principal routes [4]. First, the hydrogenation reactions at the carbonyl groups to cleave C-C single bonds, displacement of hydroxyl groups and ring-opening reactions could be anticipated.…”

“…They are widely used to treat human health and stimulate livestock growth [3]. Interestingly, about 70 to 90% of unmetabolized or partially metabolized TC is eliminated from the body through urine and feces that reach wastewater and eventually freshwater bodies [4]. Also, the TC along with other antibiotic molecules are regarded as pseudo-persistent in aquatic environments that vents ecological menaces [5].…”

Pyrolytic synthesis of organosilane‐functionalized carbon nanoparticles for enhanced photocatalytic degradation of methylene blue under visible light irradiation

“…[ 27–28 ] Ma et al . [ 29 ] developed novel C–TiO 2 nanocomposites that showed a widened range of light response and improved efficiency of photoinduced electron migration. The degradation rate of C–TiO 2 for tetracycline was about 5.69 times higher than that of TiO 2 alone.…”