Jump to main content
Jump to site search

Issue 28, 2017
Previous Article Next Article

Porphyrin aggregates decorated MWCNT film for solar light harvesting: influence of J- and H-aggregation on the charge recombination resistance, photocatalysis, and photoinduced charge transfer kinetics

Author affiliations

Abstract

J- and H-aggregates of zinc tetraphenylporphyrin (ZnTPP) on carbon nanotube films (CNTFs) were prepared using the mixed solvent method. This resulted in completely different structures, such as the four-leaf clover and flower, on the CNTF, which were observed by recording SEM images. Characteristic changes in the electronic spectra of the ZnTPP monomer appeared when it underwent J- and H-aggregation. The measured photocurrent significantly varied for the same molecule when it was aggregated in two different ways on ITO and ITO/CNTF. The electron recombination resistance of the two aggregates, which was investigated using electrochemical impedance spectroscopy, was also different. The photocatalytic efficiency of the J- and H-aggregates was examined by performing methylene blue dye decoloration studies. In addition, a scanning electrochemical microscope was used to investigate the photoinduced charge transfer kinetics of the J- and H-aggregates at the electrode/electrolyte interface as a fresh attempt. The heterogeneous charge transfer constants for the J- and H-aggregates in the presence of light at varied intensities were calculated. Thereby, striking differences in the photophysical, photocatalytic, and photoelectrochemical properties of the J- and H-aggregates were visualized throughout our studies.

Graphical abstract: Porphyrin aggregates decorated MWCNT film for solar light harvesting: influence of J- and H-aggregation on the charge recombination resistance, photocatalysis, and photoinduced charge transfer kinetics

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Apr 2017, accepted on 14 Jun 2017 and first published on 06 Jul 2017


Article type: Paper
DOI: 10.1039/C7CP02815F
Citation: Phys. Chem. Chem. Phys., 2017,19, 18232-18242
  •   Request permissions

    Porphyrin aggregates decorated MWCNT film for solar light harvesting: influence of J- and H-aggregation on the charge recombination resistance, photocatalysis, and photoinduced charge transfer kinetics

    S. Devaramani, M. I. Shinger, X. Ma, M. Yao, S. Zhang, D. Qin and X. Lu, Phys. Chem. Chem. Phys., 2017, 19, 18232
    DOI: 10.1039/C7CP02815F

Search articles by author

Spotlight

Advertisements