All-solid-state Z-scheme in CdS–Au–TiO2 three-component nanojunction system
Source abstract
Abstract
Natural photosynthesis, which achieves efficient solar energy conversion through the combined actions of many types of molecules ingeniously arranged in a nanospace, highlights the importance of a technique for site-selective coupling of different materials to realize artificial high-efficiency devices. In view of increasingly serious energy and environmental problems, semiconductor-based artificial photosynthetic systems consisting of isolated photochemical system 1 (PS1), PS2 and the electron-transfer system have recently been developed. However, the direct coupling of the components is crucial for retarding back reactions to increase the reaction efficiency. Here, we report a simple technique for forming an anisotropic CdS-Au-TiO2 nanojunction, in which PS1(CdS), PS2(TiO2) and the electron-transfer system (Au) are spatially fixed. This three-component system exhibits a high photocatalytic activity, far exceeding those of the single- and two-component systems, as a result of vectorial electron transfer driven by the two-step excitation of TiO2 and CdS.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Mokari, T., Rothenberg, E., Popov, I., Costi, R. & Banin, U. Selective growth of metal tips onto semiconductor quantum rods and tetrapods. Science 304, 1787–1790 (2004).10.1126/science.1097830 ↗
2. Sayama, K., Mukasa, K., Abe, R., Abe, Y. & Arakawa, H. Stoichiometric water splitting into H2 and O2 using a mixture of two different photocatalysts and an IO3−/I− shuttle redox mediator under visible light irradiation. Chem. Commun. 2416–2417 (2001).
3. Kato, H., Hori, M., Konta, R., Shimodaira, Y. & Kudo, A. Construction of Z-scheme type heterogeneous photocatalysis systems for water splitting into H2 and O2 under visible light irradiation. Chem. Lett. 33, 1348–1349 (2004).10.1246/cl.2004.1348 ↗
4. Gräztel, M. Photoelectrochemical cells. Nature 414, 338–344 (2001).10.1038/35104607 ↗
5. Gur, I., Fromer, N. A., Geier, M. L. & Alivisatos, A. P. Air-stable all-inorganic nanocrystal solar cells processed from solution. Science 310, 462–465 (2005).10.1126/science.1117908 ↗
6. Steckel, J. S. et al. Blue luminescence from (CdS)ZnS core-shell nanocrystals. Angew. Chem. Int. Edn 43, 2154–2158 (2004).10.1002/anie.200453728 ↗
7. Ohko, Y. et al. Multicolour photochromism of TiO2 films loaded with silver nanoparticles. Nature Mater. 2, 29–31 (2003).10.1038/nmat796 ↗
8. Xu, J., Zhao, W., Luo, X. & Chen, H. A sensitive biosensor for lactate based on layer-by-layer assembling MnO2 nanoparticles and lactate oxidase on ion-sensitive field-effect transistors. Chem. Commun. 792–794 (2005).10.1039/b416548a ↗
9. Tsubata, S., Haruta, M., Kobayashi, T., Ueda, A. & Nakahara, Y. Preparation of Catalysts V 695–704 (Elsevier, Amsterdam, 1991).
10. Kiyonaga, T. et al. Ultrafast photosynthetic reduction of elemental sulfur by Au nanoparticle-loaded TiO2 . J. Phys. Chem. B 110, 10771–10778 (2006).10.1021/jp061528e ↗
11. Honma, I., Sano, T. & Komiyama, H. Surface-enhanced Raman scattering (SERS) for semiconductor microcrystallites observed in silver-cadmium sulfide hybrid particles. J. Phys. Chem. 97, 6692–6695 (1993).10.1021/j100127a020 ↗
12. Brus, L. E. Electron-electron and electron-hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state. J. Chem. Phys. 80, 4403–4409 (1984).10.1063/1.447218 ↗
13. Weller, H. Colloidal semiconductor Q-particles: Chemistry in the transition region between solid state and molecules. Angew. Chem. Int. Edn 32, 41–53 (1993).10.1002/anie.199300411 ↗
14. Hattori, A. & Tada, H. High photocatalytic activity of F-doped TiO2 film on glass. J. Sol–Gel Sci. Technol. 22, 47–52 (2001).10.1023/A:1011260219229 ↗
15. Tada, H. et al. Au-core/Pt-shell bimetallic cluster-loaded TiO2. 1. adsorption of organosulfur compound. J. Phys. Chem. B 106, 8714–8720 (2002).10.1021/jp0202690 ↗
16. Spanhel, L., Weller, H. & Henglein, A. Photochemistry of semiconductor colloids. 22. Electron injection from illuminated CdS into attached TiO2 and ZnO particles. J. Am. Chem. Soc. 109, 6632–6635 (1987).10.1021/ja00256a012 ↗
17. Hirai, T., Suzuki, K. & Komasawa, I. Preparation and photocatalytic activities of composite CdS nanoparticles-titanium dioxide particles. J. Colloid Interface Sci. 244, 262–265 (2001).10.1006/jcis.2001.7982 ↗
18. Kittel, C. Introduction to Solid State Physics 7th edn, 302 (Wiley, New York, 1996).
19. Nosaka, Y. Finite depth spherical well model for excited states of ultrasmall semiconductor particles: an application. J. Phys. Chem. 95, 5054–5058 (1991).10.1021/j100166a028 ↗
20. Kalyanasundaram, K., Borgarello, E. & Grätzel, M. Visible light induced water cleavage in CdS dispersions loaded with Pt and RuO2, hole scavenging by RuO2 . Helv. Chim. Acta 64, 362–366 (1981).10.1002/hlca.19810640137 ↗
21. Tada, H., Soejima, T., Ito, S. & Kobayashi, H. Photoinduced desorption of sulfur from gold nanoparticles loaded on metal oxide surfaces. J. Am. Chem. Soc. 126, 15952–15953 (2004).10.1021/ja0449980 ↗
22. Asahi, R., Morikawa, T., Ohwaki, T., Aoki, K. & Taga, Y. Visible-light photocatalysis in nitrogen-doped titanium oxides. Science 293, 269–271 (2001).10.1126/science.1061051 ↗