One-Step Synthesis of Si@Ti3+ Self-Doped TiO2 Heterostructure with Enhanced Photocatalytic Performance

Xingquan Zhang; Yousong Liu; Hongjia Ji; Jun Wang; Jin Chen; Jichuan Huo; Hongtao Song

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자료유형: 학술저널

저자정보: Xingquan Zhang (Southwest University of Science and Technology) Yousong Liu (China Academy of Engineering) Hongjia Ji (Southwest University of Science and Technology) Jun Wang (China Academy of Engineering) Jin Chen (China Academy of Engineering) Jichuan Huo (Southwest University of Science and Technology) Hongtao Song (China Academy of Engineering)

저널정보: 성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.10

발행연도: 2019.1

수록면: 110 - 120 (11page)

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Heterostructure construction and doping provide two powerful routes for manipulating charge carrier separation, electrical transport, optical response, and interface kinetics for photocatalysis. However, the literature reported synthetic methods until now were very time-consuming. In this work, a facile one-pot hydrothermal reaction route was designed to synthesize Si nanospheres @ Ti3+ self-doped TiO2 nanosheet heterostructure with tunable Ti3+ doping levels at different hydrothermal temperatures. It was found that the precursor Si nanospheres not only serve as supporter of TiO2 nanosheets, but also are the inducement of Ti 3+ doping. Due to the synergistic effect of Ti3+ doping and Si/TiO2 heterojunctions, the optimal sample exhibited 6.74-fold enhancement for rhodamine B (RhB) photodegradation under Xe lamp irradiation compared with the pristine TiO2. The construction of Si/TiO2 heterojunction, as well as the introduced Ti3+ doping and associated oxygen vacancies, extended the optical absorption of TiO2 into visible region and enhanced the separation efficiency of photogenerated electron-hole pairs, which finally resulted in improved photocatalytic performance of the Si@Ti3+ self-doped TiO2 core–shell nanospheres. The designed hydrothermal route opens up an opportunity to the synthesis of doped hetero-photocatalysts in an efficient way.

#Si/TiO2 heterostructure #Ti3+ self-doped TiO2 #oxygen vacancy #photocatalysis

참고문헌 (43)

참고문헌 신청

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C. Liu / 2014 / Chem. Mater 26:415

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Y. Ma / 2014 / Chem. Rev 114:9987

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