1 / 14

Quantum dot self-decorated TiO 2 nanosheet

IUMRS-ICAM2013,Qingdao,Sep.22-28. Quantum dot self-decorated TiO 2 nanosheet. Feng-Min Zhao Tianjin University, China Sep. 24 2013. Contents. Introduction. 1. 2. Experimental. 3. Results and discussion. 4. Conclusions. Introduction. <5%. Solar Energy.

Télécharger la présentation

Quantum dot self-decorated TiO 2 nanosheet

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. IUMRS-ICAM2013,Qingdao,Sep.22-28 Quantum dot self-decorated TiO2 nanosheet Feng-Min Zhao Tianjin University, China Sep. 24 2013

  2. Contents Introduction 1 2 Experimental 3 Resultsand discussion 4 Conclusions

  3. Introduction <5% Solar Energy Chem. Soc. Rev., 2009, 38, 253-278.

  4. Introduction truncated tetragonal bipyramid anatase Faceted Anatase Nature, 2008, 453, 638-641. Using MSC films, the fabricated all-solid-state, low-temperature sensitized solar cells that have 7.3 % efficiency, the highest efficiency yet reported. Faceted Anatase with Mesopores Nature, 2013, 495, 215-219

  5. Introduction Doping Science, 2001, 293, 269-271. Science, 2011, 331, 746-750. JACS, 2008, 130, 5018-5019.

  6. TBOT + HF(40 wt%) hydrothermally treated at 180oC 24h 72h 168h A-t: NaOH A-tH: NaOH 100 oC 24h A-tC: NaOH 500 oC 2h Experimental

  7. Results and discussion 24h 72h 168h

  8. Results and discussion 24h 72h %S{001}exp =S{001}/(S{101}+S{001}) =2a2/{4ab+2a2]*100 168h According to J. Phys. Chem. C 2012, 116, 7515 − 7519

  9. Results and discussion UV-vis DRS XPS O2s

  10. Results and discussion XPS EPR (110 K)

  11. Results and discussion Post-hydrothermal Post-calcination A-168H: 3.4 times higher than A-24 2.7 times higher than P-25 Photodegradation of RhB

  12. Results and discussion 1 3 4 2 5 Ag photo-deposition on A-168H(d) and A-24(e) TEM-EDS

  13. Conclusions • The long-time hydrothermal strategy and subsequent defect healing are the keys to obtain defect-free nanosheets decorated with TiO2 quantum dots. • The size of nanosheets progressively increases with t, but the {001} percentage almost remains unchanged (81–83%). • The surface Ti3+ defects suppress the photoactivity and could be removed by hydrothermal treatment or calcination. • The quantum dots provide a new and more effective charge separation and transfer pathway over the nanosheet surfaces, and promote the photoactivity significantly.

  14. Quantum dot self-decorated TiO2 nanosheet Thank You For Your Attention!

More Related