TY - JOUR
T1 - In-Situ generation of nano TiO2 from MIL-125(Ti) and its role in boosting the photocatalytic degradation of tetracycline hydrochloride
AU - Lu, Chuyu
AU - Yi, Futao
AU - Ma, Jianqing
AU - Sillanpää, Mika Erik Tapio
AU - Zhou, Minghua
AU - Ye, Qing
AU - Jin, Huixia
AU - Zhang, Kefeng
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2025/2/1
Y1 - 2025/2/1
N2 - Metal-organic frameworks (MOFs), such as MIL-125(Ti), are advanced photocatalytic materials due to their tunable compositions and functionalities. However, their practical application in photocatalysis is often limited by their wide bandgap and the inherent structural instability. This study presents a strategy to improve the photocatalytic performance of MIL-125(Ti) by hydrothermal reaction combined with an in-situ decomposition to generate nano TiO2, creating a composite with g-C3N5 nanosheets. The obtained composite exhibited a rate constant of 0.00122 min−1 mg−1 for the degradation of tetracycline hydrochloride under visible light irradiation, which is 24.4 and 20.3 times that of g-C3N5 and MIL-125(Ti), respectively. Characterization results indicated the formation of an effective composite structure that improved the separation efficiency of photogenerated carriers and promoted the generation of reactive oxygen species. The in-situ generated TiO2 within the MIL-125(Ti)/g-C3N5 composite during the preparation and photocatalysis processes not only compensated for the structural damage to the original MIL-125(Ti) but also significantly enhanced its degradation performance under visible light. The recyclability and stability of the composite material were also demonstrated, highlighting its potential for practical photocatalytic applications.
AB - Metal-organic frameworks (MOFs), such as MIL-125(Ti), are advanced photocatalytic materials due to their tunable compositions and functionalities. However, their practical application in photocatalysis is often limited by their wide bandgap and the inherent structural instability. This study presents a strategy to improve the photocatalytic performance of MIL-125(Ti) by hydrothermal reaction combined with an in-situ decomposition to generate nano TiO2, creating a composite with g-C3N5 nanosheets. The obtained composite exhibited a rate constant of 0.00122 min−1 mg−1 for the degradation of tetracycline hydrochloride under visible light irradiation, which is 24.4 and 20.3 times that of g-C3N5 and MIL-125(Ti), respectively. Characterization results indicated the formation of an effective composite structure that improved the separation efficiency of photogenerated carriers and promoted the generation of reactive oxygen species. The in-situ generated TiO2 within the MIL-125(Ti)/g-C3N5 composite during the preparation and photocatalysis processes not only compensated for the structural damage to the original MIL-125(Ti) but also significantly enhanced its degradation performance under visible light. The recyclability and stability of the composite material were also demonstrated, highlighting its potential for practical photocatalytic applications.
KW - g-CN nanosheets
KW - Metal-organic framework materials
KW - Photocatalytic oxidation
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=85207639074&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2024.116103
DO - 10.1016/j.jphotochem.2024.116103
M3 - Article
AN - SCOPUS:85207639074
SN - 1010-6030
VL - 459
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
M1 - 116103
ER -