Applied Physics A

, 124:769 | Cite as

Titania/reduced graphene oxide composite nanofibers for the direct extraction of photosynthetic electrons from microalgae for biophotovoltaic cell applications

  • N. Senthilkumar
  • Sunirmal Sheet
  • Y. Sathishkumar
  • Yang Soo LeeEmail author
  • Siew-Moi Phang
  • Vengadesh PeriasamyEmail author
  • G. Gnana kumarEmail author


Titanium oxide (TiO2)/reduced graphene oxide (rGO) composite nanofibers were synthesized via an electrospinning technique and its potential electrochemical activity constructed its realization as an efficient anode catalyst in biophotovoltaic cells (BPV) with Chlorella vulgaris. The uniform adherence of GO sheets over the hydrolyzed Ti4+ ions, followed by its simultaneous reduction and crystallization, yielded the TiO2/rGO composite nanofibers. The strong interconnection among the nanofibers and the intimate contact between rGO and TiO2 in TiO2/rGO composite improved the efficient electron transportation paths, facilitating the higher oxidation and continuous and stable currents as substantiated, respectively, from the cyclic voltammetry and chronoamperometry studies. By coupling the continuous electron conduction paths, proficient cell interaction, and elevated structural and chemical stabilities, TiO2/rGO demonstrated the BPV power density of 34.66 ± 1.3 mW m−2 with excellent durability, outperforming the BPV performances of previous reports. Thus the fundamental understanding achieved on the influences of nanocatalytic system in green energy generation opens up the new horizon of anticipation towards the development of sustainable and high-performance BPVs.



This study was supported by the Science and Engineering Research Board (SERB), New Delhi, India, Major Project Grant No.: EMR/2015/000912. Dr. Phang was supported by HICoE MOHE:IOES-2014F Grant and Newton Prize 2017 (IF008-2018).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physical Chemistry, School of ChemistryMadurai Kamaraj UniversityMaduraiIndia
  2. 2.Department of Forest Science and Technology, College of Agriculture and Life SciencesChonbuk National UniversityJeonju-siRepublic of Korea
  3. 3.Institute of Ocean and Earth Sciences (IOES)University of MalayaKuala LumpurMalaysia
  4. 4.Institute of Biological Sciences, Faculty of ScienceUniversity of MalayaKuala LumpurMalaysia
  5. 5.Low Dimensional Materials Research Centre (LDMRC), Department of PhysicsUniversity of MalayaKuala LumpurMalaysia

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