TY - JOUR
T1 - Enhanced photocatalytic performance of TiO2 through a novel direct dual Z-scheme design
AU - Sari, Fitri Nur Indah
AU - Yen, Duong Thi Kim
AU - Ting, Jyh Ming
N1 - Funding Information:
This work was funded by the Ministry of Science and Technology (MOST) in Taiwan under Grant No. 106-2221-E-006-170-MY3.
Publisher Copyright:
© 2020
PY - 2020/12/15
Y1 - 2020/12/15
N2 - A novel ternary TiO2/MoO3/g-C3N4 nanocomposite photocatalyst has been synthesized and shown to exhibit a direct dual Z-scheme photodegradation mechanism. The TiO2/MoO3/g-C3N4 nanocomposite catalyst outperforms its constituents for methylene blue degradation. The highest degradation rate constant of 0.0303 min−1 is about 3.9 times greater than that of TiO2. The improved photocatalytic activity is attributed to the enhanced visible light absorption from the g-C3N4 and α-MoO3, enhanced photogenerated hole/electron separation primarily in the TiO2 and α-MoO3, and enhanced fast charge transfer due to the existence of oxygen vacancies. The photodegradation mechanism is explained using a direct dual Z-scheme. This work affords a new insight towards designing highly efficient Z-scheme photocatalysts with enhanced visible light absorption, efficient photogenerated hole/electron separation, and strong redox ability.
AB - A novel ternary TiO2/MoO3/g-C3N4 nanocomposite photocatalyst has been synthesized and shown to exhibit a direct dual Z-scheme photodegradation mechanism. The TiO2/MoO3/g-C3N4 nanocomposite catalyst outperforms its constituents for methylene blue degradation. The highest degradation rate constant of 0.0303 min−1 is about 3.9 times greater than that of TiO2. The improved photocatalytic activity is attributed to the enhanced visible light absorption from the g-C3N4 and α-MoO3, enhanced photogenerated hole/electron separation primarily in the TiO2 and α-MoO3, and enhanced fast charge transfer due to the existence of oxygen vacancies. The photodegradation mechanism is explained using a direct dual Z-scheme. This work affords a new insight towards designing highly efficient Z-scheme photocatalysts with enhanced visible light absorption, efficient photogenerated hole/electron separation, and strong redox ability.
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U2 - 10.1016/j.apsusc.2020.147506
DO - 10.1016/j.apsusc.2020.147506
M3 - Article
AN - SCOPUS:85089526715
VL - 533
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
M1 - 147506
ER -