Journal
NANO RESEARCH
Volume 12, Issue 2, Pages 457-462Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-018-2240-4
Keywords
single atom catalyst; graphitic carbon nitride; two-dimensional (2D) photocatalysts; visible-light; CO2 reduction
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Funding
- National Key R&D Program of China [2017YFA0700104]
- National Natural Science Foundation of China [21790052, 21331007, 21805207]
- 111 Project of China [D17003]
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A visible-light-response, efficient and robust photo-catalyst for CO2 reduction is highly desirable. Herein, we demonstrate that single titanium-oxide species implanted in two-dimensional (2D) graphitic carbon nitride (g-C3N4) matrix (2D TiO-CN) can efficiently photo-catalyze the reduction of CO2 to CO under the irradiation of visible light. The synergistic interaction between single titanium oxide species and g-C3N4 in 2D TiO-CN not only enhances the separation of photo-excited charges, but also results in visible light response of single titanium-oxide species, realizing high activity of CO2 photo-reduction with extremely high CO generation rate of 283.9 molh(-1)g(-1), 5.7, 6.8 and 292.2 times larger than those of TiO2/CN hybrid material, CN and commercial TiO2, respectively. Time-resolved fluorescence and electron spin resonance spectroscopy revealed the catalytic mechanism of the fabricated 2D TiO-CN photocatalysts for CO2 reduction.
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