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Synergistic Effect of CdSe Quantum Dot Sensitization and Nitrogen Doping of TiO2 Nanostructures for Photoelectrochemical Solar Hydrogen Generation
Abstract
We report the synthesis and photoelectrochemical (PEC) studies of TiO(2) nanoparticles and nanowires simultaneously doped with nitrogen and sensitized with CdSe quantum dots (QDs). These novel nanocomposite structures have been applied successfully as photoanodes for PEC hydrogen generation using Na(2)S and Na(2)SO(3) as sacrificial reagents. We observe significant enhanced photoresponse in these nanocomposites compared to N-doped TiO(2) or CdSe QD sensitized TiO(2). The enhancement is attributed to the synergistic effect of CdSe sensitization and N-doping that facilitate hole transfer/transport from CdSe to TiO(2) through oxygen vacancy states (V(o)) mediated by N-doping. The results demonstrate the importance of designing and manipulating the energy band alignment in composite nanomaterials for fundamentally improving charge separation and transport and thereby PEC properties.
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Electrochemical Photolysis of Water at a Semiconductor Electrode
FUJISHIMA, A., & HONDA, K. (1972) · Nature · doi:10.1038/238037a0 · Cited by 34,169
Cited by
Oxygen vacancies in metal oxides: recent progress towards advanced catalyst design
Zhuang, G., Chen, Y., Zhuang, Z., Yu, Y., & Yu, J. (2020) · Science China Materials · doi:10.1007/s40843-020-1305-6 · Cited by 499
Chen, H. M., Chen, C. K., Chang, Y., Tsai, C., Liu, R., Hu, S., Chang, W., & Chen, K. (2010) · Angewandte Chemie International Edition · doi:10.1002/anie.201001827 · Cited by 293
Ouyang, S., & Ye, J. (2011) · Journal of the American Chemical Society · doi:10.1021/ja110691t · Cited by 287
Yue, X., Li, H., Qiu, Y., Xiao, Z., Yu, X., Xue, C., & Xiang, J. (2021) · Journal of Solid State Chemistry · doi:10.1016/j.jssc.2021.122250 · Cited by 16
Metadata
- Authors
- Hensel, J., Wang, G., Li, Y., & Zhang, J. Z.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-01-26
- Volume
- 10
- Issue
- 2
- Pages
- 478-483
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2020011179
- Cited by
- 482
- References
- 1
- FWCI
- 21.50
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Synergistic Effect of CdSe Quantum Dot Sensitization and Nitrogen Doping of TiO2 Nanostructures for Photoelectrochemical Solar Hydrogen Generation. https://app.cochat.ai/papers/10.1021/nl903217w
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- Hensel, J., Wang, G., Li, Y., & Zhang, J. Z. (2010). Synergistic Effect of CdSe Quantum Dot Sensitization and Nitrogen Doping of TiO2 Nanostructures for Photoelectrochemical Solar Hydrogen Generation. Nano Letters. https://doi.org/10.1021/nl903217w
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
