Enhanced Degradation of Carbamazepine from Constructed Wetlands with a PEC System Based on an Anode of N-TiO2 Nanocrystal-Modified TiO2 Nanotubes and an Activated Carbon Photocathode

Autor: Xiongwei Liang, Shaopeng Yu, Bo Meng, Jia Liu, Chunxue Yang, Chuanqi Shi, Junnan Ding
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Separations, Vol 11, Iss 7, p 216 (2024)
Druh dokumentu: article
ISSN: 2297-8739
DOI: 10.3390/separations11070216
Popis: We used the Vienna ab initio Simulation Package (VASP), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance (DRS) to optimize anode material for a photoelectric catalytic system. After screening how the doping of TiO2 by N and S affects its photoelectric properties, N-doped TiO2 was selected to fabricate the photoelectron catalytic (PEC) system. TiO2 nanotubes modified by N-doped TiO2 nanocrystals and activated carbon were used as an anode and as a photocathode, respectively, to decompose carbamazepine in water samples from the constructed wetlands. The calculations showed that the N-TiO2 NCs/TNTAs-AC/PTFE system had the highest content of •OH. The highest carbamazepine removal rate under the N-TiO2 NCs/TNTAs-AC/PTFE composite presence was at pH = 8, and 69% of carbamazepine was removed within 180 min of the constructed wetland water treatment at pH = 7.8. The PEC system containing modified (with nano N-TiO2) TiO2 nanotubes as an anode and activated carbon as a photocathode can effectively decompose carbamazepine in the constructed wetlands.
Databáze: Directory of Open Access Journals
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