TY - JOUR
T1 - A synergy of CdSe sensitization and exposure of TiO2 (0 0 1) facet in CdSe-TiO2 nanostructures for photoreduction of bicarbonate
AU - Khalil, Munawar
AU - Rangkuti, Talitha H.
AU - Naumi, Fadlinatin
AU - Gunlazuardi, Jarnuzi
AU - Ivandini, Tribidasari A.
AU - Kadja, Grandprix T.M.
AU - Mulyana, Jacob Y.
N1 - Funding Information:
We gratefully acknowledge the financial support provided by the Indonesian Ministry of Research and Technology / National Research and Innovation Agency (Kemenristek/BRIN) and Directorate of Research and Innovation, University of Indonesia , under Hibah Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) 2020 .
Funding Information:
We gratefully acknowledge the financial support provided by the Indonesian Ministry of Research and Technology/National Research and Innovation Agency (Kemenristek/BRIN) and Directorate of Research and Innovation, University of Indonesia, under Hibah Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) 2020.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/8
Y1 - 2020/8
N2 - This study reports an investigation on the synergistic effect of sensitization by CdSe and exposure of TiO2′s (0 0 1) facet towards the photoactivity of CdSe-TiO2 nanostructures for photoreduction of bicarbonate. Here, TiO2 nanoparticles with spindle-like morphology with high exposure of (0 0 1) facet were successfully synthesized. Whereas, different sizes of CdSe particles were prepared and integrated to TiO2 using 3-mercopatopropionic acid (MPA) as the linker. Based on the spectroscopic analyses, it was found that the as-prepared CdSe-TiO2 were able to absorb a broad spectrum of light energy from UV to visible as the result of band overlap between CdSe and TiO2. Besides, results demonstrated that this band overlap also caused the blueshift in the TiO2 bandgap, where the magnitude of the shift was found to be proportional to CdSe size. Furthermore, it is revealed that the as-prepared CdSe-TiO2 was able to facilitate the photoreduction of bicarbonate efficiently. Interestingly, the photoactivity of the nanocatalysts was also found to be proportional to the size of CdSe. This excellent photoactivity was believed due to the presence of type II band alignment as the result of the conduction band overlap between TiO2 and CdSe. Additionally, such activity could also be attributed to the formation of surface heterojunction of TiO2′s (1 0 1) and (0 0 1) facets, which facilitates the efficient charge separation.
AB - This study reports an investigation on the synergistic effect of sensitization by CdSe and exposure of TiO2′s (0 0 1) facet towards the photoactivity of CdSe-TiO2 nanostructures for photoreduction of bicarbonate. Here, TiO2 nanoparticles with spindle-like morphology with high exposure of (0 0 1) facet were successfully synthesized. Whereas, different sizes of CdSe particles were prepared and integrated to TiO2 using 3-mercopatopropionic acid (MPA) as the linker. Based on the spectroscopic analyses, it was found that the as-prepared CdSe-TiO2 were able to absorb a broad spectrum of light energy from UV to visible as the result of band overlap between CdSe and TiO2. Besides, results demonstrated that this band overlap also caused the blueshift in the TiO2 bandgap, where the magnitude of the shift was found to be proportional to CdSe size. Furthermore, it is revealed that the as-prepared CdSe-TiO2 was able to facilitate the photoreduction of bicarbonate efficiently. Interestingly, the photoactivity of the nanocatalysts was also found to be proportional to the size of CdSe. This excellent photoactivity was believed due to the presence of type II band alignment as the result of the conduction band overlap between TiO2 and CdSe. Additionally, such activity could also be attributed to the formation of surface heterojunction of TiO2′s (1 0 1) and (0 0 1) facets, which facilitates the efficient charge separation.
KW - Bicarbonate
KW - CdSe
KW - Crystal facet
KW - Photoreduction
KW - Quantum dots
KW - TiO
UR - http://www.scopus.com/inward/record.url?scp=85098454254&partnerID=8YFLogxK
U2 - 10.1016/j.inoche.2020.107992
DO - 10.1016/j.inoche.2020.107992
M3 - Article
AN - SCOPUS:85098454254
SN - 1387-7003
VL - 118
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
M1 - 107992
ER -