Molecules, Vol. 29, Pages 1719: The Piezocatalytic Degradation of Sulfadiazine by Lanthanum-Doped Barium Titanate

Molecules, Vol. 29, Pages 1719: The Piezocatalytic Degradation of Sulfadiazine by Lanthanum-Doped Barium Titanate Molecules doi: 10.3390/molecules29081719 Authors: Daijun Meng Yuqi Xiang Ziwei Yang Hao Yuan Liang Tang Shiyang Li Piezocatalysis, a heterogeneous catalytic technique, leverages the periodic electric field changes generated by piezoelectric materials under external forces to drive carriers for the advanced oxidation of organic pollutants. Antibiotics, as emerging trace organic pollutants in water sources, pose a potential threat to animals and drinking water safety. Thus, piezoelectric catalysis can be used to degrade trace organic pollutants in water. In this work, BaTiO3 and La-doped BaTiO3 were synthesized using an improved sol–gel–hydrothermal method and used as piezocatalytic materials to degrade sulfadiazine (SDZ) with ultrasound activation. High-crystallinity products with nano cubic and spherical morphologies were successfully synthesized. An initial concentration of SDZ ranging from 1 to 10 mg/L, a catalysis dosage range from 1 to 2.5 mg/mL, pH, and the background ions in the water were considered as influencing factors and tested. The reaction rate constant was 0.0378 min−1 under the optimum working conditions, and the degradation efficiency achieved was 89.06% in 60 min. La-doped BaTiO3 had a better degradation efficiency, at 14.98% on average, compared to undoped BaTiO3. Further investigations...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research