TY - JOUR
T1 - In situ turning defects of exfoliated Ti3C2 MXene into Fenton-like catalytic active sites
AU - Jiang, Yue
AU - Baimanov, Didar
AU - Jin, Shan
AU - Law, Japhet Cheuk Fung
AU - Zhao, Pengcheng
AU - Tang, Juanjuan
AU - Peng, Jian
AU - Wang, Liming
AU - Leung, Kelvin Sze Yin
AU - Sheng, Wenchao
AU - Lin, Sijie
N1 - Funding Information:
ACKNOWLEDGMENTS. This work was supported by the National Key Research and Development Program of China (no. 2018YFC1803100), the National Natural Science Foundation of China (no. 21777116), and the Fundamental Research Funds for the Central Universities.
Publisher Copyright:
© 2022 the Author(s).
PY - 2023/1/3
Y1 - 2023/1/3
N2 - Controllable in situ formation of nanoclusters with discrete active sites is highly desirable in heterogeneous catalysis. Herein, a titanium oxide-based Fenton-like catalyst is constructed using exfoliated Ti3C2 MXene as a template. Theoretical calculations reveal that a redox reaction between the surface Ti-deficit vacancies of the exfoliated Ti3C2 MXene and H2O2 molecules facilitates the in situ conversion of surface defects into titanium oxide nanoclusters anchoring on amorphous carbon (TiOx@C). The presence of mixed-valence Tiδ+ (δ = 0, 2, 3, and 4) within TiOx@C is confirmed by X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) characterizations. The abundant surface defects within TiOx@C effectively promote the generation of reactive oxygen species (ROS) leading to superior and stable Fenton-like catalytic degradation of atrazine, a typical agricultural herbicide. Such an in situ construction of Fenton-like catalysts through defect engineering also applies to other MXene family materials, such as V2C and Nb2C.
AB - Controllable in situ formation of nanoclusters with discrete active sites is highly desirable in heterogeneous catalysis. Herein, a titanium oxide-based Fenton-like catalyst is constructed using exfoliated Ti3C2 MXene as a template. Theoretical calculations reveal that a redox reaction between the surface Ti-deficit vacancies of the exfoliated Ti3C2 MXene and H2O2 molecules facilitates the in situ conversion of surface defects into titanium oxide nanoclusters anchoring on amorphous carbon (TiOx@C). The presence of mixed-valence Tiδ+ (δ = 0, 2, 3, and 4) within TiOx@C is confirmed by X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) characterizations. The abundant surface defects within TiOx@C effectively promote the generation of reactive oxygen species (ROS) leading to superior and stable Fenton-like catalytic degradation of atrazine, a typical agricultural herbicide. Such an in situ construction of Fenton-like catalysts through defect engineering also applies to other MXene family materials, such as V2C and Nb2C.
KW - heterogeneous catalysis
KW - in situ
KW - multivalence
KW - MXene
KW - template synthesis
UR - http://www.scopus.com/inward/record.url?scp=85144795301&partnerID=8YFLogxK
U2 - 10.1073/pnas.2210211120
DO - 10.1073/pnas.2210211120
M3 - Journal article
C2 - 36574649
AN - SCOPUS:85144795301
SN - 0027-8424
VL - 120
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 1
M1 - e2210211120
ER -