TY - JOUR
T1 - Intrinsic carbon-doping induced synthesis of oxygen vacancies-mediated TiO2 nanocrystals
T2 - Enhanced photocatalytic NO removal performance and mechanism
AU - Gu, Zhanyong
AU - Cui, Zhitao
AU - Wang, Zijing
AU - Sinkou Qin, Ken
AU - Asakura, Yusuke
AU - Hasegawa, Takuya
AU - Hongo, Kenta
AU - Maezono, Ryo
AU - Yin, Shu
N1 - Funding Information:
The financial support from JSPS Grant-in-Aid for Scientific Research Grants Number ( 20H00297 ) and the Research Grants on Innovative Areas “Mixed anion” (No.16H06439,19H04692), the Dynamic Alliance for Open Innovations Bridging Human, the Cooperative Research Program of “Network Joint Research Center for Materials and Devices”. We also thank the Research Center for Advanced Computing Infrastructure of JAIST providing the computational resource and software. R.M. thanks Toyota Motor Corporation, FLAGSHIP2020(project nos. hp190169 and hp190167 at K-computer), Air Force Office of Scientific Research (AFOSR-AOARD/FA2386-17-1-4049; FA2386-19-1-4015) for financial support. K.H. thanks Grant-in-Aid for Scientific Research on Innovative Areas (19H05169), FLAGSHIP2020 (project nos. hp180206 and hp180175 at K-computer), and KAKENHI grant (19 K05029) for financial support. We acknowledge Miss Xuan Zhou (Dutch Institute for Fundamental Energy Research) for helpful discussions. Z.G. thanks the China Scholarship Council for the scholarship.
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2021/1
Y1 - 2021/1
N2 - Herein, we developed a facile approach to fabricate oxygen vacancies-mediated TiO2 (OVs-TiO2) nanocrystals via an intrinsic carbon-doping induced strategy. The intrinsic carbon-doped TiO2 nanocrystals were firstly synthesized by water-controlled-releasing solvothermal (WCRS) process using ethanol, acetic acid and titanium tetraisopropoxide (TTIP) as precursors. The carbon-doped TiO2 was calcined at 325 °C under N2 atmosphere to introduce the OVs. The obtained OVs-TiO2 displayed outstanding photocatalytic NO removal performance under visible light irradiation (λ˃510 nm), in comparison with the commercial P25. With the aid of DFT calculations, we revealed that the intrinsic carbon-doping was beneficial for the formations of OVs in carbon-doped TiO2. Moreover, the OVs played crucial roles in improving light absorption, facilitating charge separation, and activating surface reactions to enhance the photocatalytic NO removal performance.
AB - Herein, we developed a facile approach to fabricate oxygen vacancies-mediated TiO2 (OVs-TiO2) nanocrystals via an intrinsic carbon-doping induced strategy. The intrinsic carbon-doped TiO2 nanocrystals were firstly synthesized by water-controlled-releasing solvothermal (WCRS) process using ethanol, acetic acid and titanium tetraisopropoxide (TTIP) as precursors. The carbon-doped TiO2 was calcined at 325 °C under N2 atmosphere to introduce the OVs. The obtained OVs-TiO2 displayed outstanding photocatalytic NO removal performance under visible light irradiation (λ˃510 nm), in comparison with the commercial P25. With the aid of DFT calculations, we revealed that the intrinsic carbon-doping was beneficial for the formations of OVs in carbon-doped TiO2. Moreover, the OVs played crucial roles in improving light absorption, facilitating charge separation, and activating surface reactions to enhance the photocatalytic NO removal performance.
KW - Intrinsic carbon-doping
KW - Mechanism
KW - Oxygen vacancies
KW - Photocatalytic NO removal
KW - Visible light
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U2 - 10.1016/j.jcat.2020.11.025
DO - 10.1016/j.jcat.2020.11.025
M3 - Article
AN - SCOPUS:85098459817
SN - 0021-9517
VL - 393
SP - 179
EP - 189
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -