Carbon nanohorn-porphyrin dimer hybrid material for enhancing light-energy conversion

Georgia Pagona, Galateia E. Zervaki, Atula S D Sandanayaka, Osamu Ito, Georgios Charalambidis, Taku Hasobe, Athanassios G. Coutsolelos, Nikos Tagmatarchis

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The covalent grafting through a rigid ester bond of a dimeric porphyrin [(H 2P) 2] and carbon nanohorns (CNHs) was accomplished. The newly formed CNH-(H 2P) 2 hybrid was found to be soluble or dispersible in several organic solvents. Application of diverse spectroscopic techniques verified the successful formation of the CNH-(H 2P) 2 hybrid material. In addition, thermogravimetric analysis revealed the amount of (H 2P) 2 loading onto CNHs, and TEM studies showed the characteristic secondary spherical superstructure morphology of the hybrid material. Efficient fluorescence quenching of (H 2P) 2 in the CNH-(H 2P) 2 hybrid suggests that photoinduced events occur from the photoexcited (H 2P) 2 to CNHs. Nanosecond transient absorption spectroscopy revealed the formation of transient species such as (H 2P) 2 •+ and CNH •- by photoinduced charge separation in CNH-(H 2P) 2. Additional proof for the photoinduced charge-separated state CNH •--(H 2P) 2 •+ was obtained, from which the electron mediates to added hexyl viologen dication (HV 2+). Finally, the CNH-(H 2P) 2 was adsorbed on nanostructured SnO 2 electrode, to construct a photoactive electrode, which reveals photocurrent and photovoltage responses with an incident photon-to-current conversion efficiency value as large as 9.6%, without the application of any bias voltage.

Original languageEnglish
Pages (from-to)9439-9449
Number of pages11
JournalJournal of Physical Chemistry C
Volume116
Issue number17
DOIs
Publication statusPublished - 2012 May 3

Fingerprint

Nanohorns
Hybrid materials
Porphyrins
energy conversion
Energy conversion
porphyrins
Dimers
Carbon
dimers
carbon
Viologens
Electrodes
electrodes
photovoltages
polarization (charge separation)
Bias voltage
Photocurrents
Absorption spectroscopy
Organic solvents
Conversion efficiency

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Pagona, G., Zervaki, G. E., Sandanayaka, A. S. D., Ito, O., Charalambidis, G., Hasobe, T., ... Tagmatarchis, N. (2012). Carbon nanohorn-porphyrin dimer hybrid material for enhancing light-energy conversion. Journal of Physical Chemistry C, 116(17), 9439-9449. https://doi.org/10.1021/jp302178q

Carbon nanohorn-porphyrin dimer hybrid material for enhancing light-energy conversion. / Pagona, Georgia; Zervaki, Galateia E.; Sandanayaka, Atula S D; Ito, Osamu; Charalambidis, Georgios; Hasobe, Taku; Coutsolelos, Athanassios G.; Tagmatarchis, Nikos.

In: Journal of Physical Chemistry C, Vol. 116, No. 17, 03.05.2012, p. 9439-9449.

Research output: Contribution to journalArticle

Pagona, G, Zervaki, GE, Sandanayaka, ASD, Ito, O, Charalambidis, G, Hasobe, T, Coutsolelos, AG & Tagmatarchis, N 2012, 'Carbon nanohorn-porphyrin dimer hybrid material for enhancing light-energy conversion', Journal of Physical Chemistry C, vol. 116, no. 17, pp. 9439-9449. https://doi.org/10.1021/jp302178q
Pagona, Georgia ; Zervaki, Galateia E. ; Sandanayaka, Atula S D ; Ito, Osamu ; Charalambidis, Georgios ; Hasobe, Taku ; Coutsolelos, Athanassios G. ; Tagmatarchis, Nikos. / Carbon nanohorn-porphyrin dimer hybrid material for enhancing light-energy conversion. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 17. pp. 9439-9449.
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