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3D Flower–Like FeWO4/CeO2 Hierarchical Architectures on rGO for Durable and High-Performance Microalgae Biophotovoltaic Fuel Cells

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Abstract

A facile chemical reduction approach is adopted for the synthesis of iron tungstate (FeWO4)/ceria (CeO2)–decorated reduced graphene oxide (rGO) nanocomposite. Surface morphological studies of rGO/FeWO4/CeO2 composite reveal the formation of hierarchical FeWO4 flower–like microstructures on rGO sheets, in which the CeO2 nanoparticles are decorated over the FeWO4 microstructures. The distinct anodic peaks observed for the cyclic voltammograms of studied electrodes under light/dark regimes validate the electroactive proteins present in the microalgae. With the cumulative endeavors of three-dimensional FeWO4 microstructures, phase effect between rGO sheet and FeWO4/CeO2, highly exposed surface area, and light harvesting property of CeO2 nanoparticles, the relevant rGO/FeWO4/CeO2 nanocomposite demonstrates high power and stable biophotovoltaic energy generation compared with those of previous reports. Thus, these findings construct a distinct horizon to tailor a ternary nanocomposite with high electrochemical activity for the construction of cost-efficient and environmentally benign fuel cells.

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Funding

This research effort was supported by the Council of Scientific and Industrial Research (CSIR), New Delhi-Major Project Grant No. 01(2997)19/EMR-II. The authors M. P and A. S received funding from the Deanship of Scientific Research at King Khalid University for this work through General Research Project under grant number G.R.P.205-40. This research effort was also supported by the Newton Prize Grant 2017 (IF008-2018) and Higher Institution Centre of Excellence (HICoE) Fund, Ministry of Education, Malaysia: Air, ocean and land interaction (IOES-2014F).

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Authors and Affiliations

  1. Department of Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu, 625021, India

    C. Karthikeyan, M. Pappathi & G. Gnana kumar

  2. Institute of Ocean and Earth Sciences (IOES) & Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia

    C. Karthikeyan, Fong-Lee Ng & Siew-Moi Phang

  3. Department of Physics, Fatima College, Madurai, Tamil Nadu, 625018, India

    G. Jenita Rani

  4. Low Dimensional Materials Research Centre (LDMRC), Department of Physics, University of Malaya, Kuala Lumpur, Malaysia

    Vengadesh Periasamy

  5. Tamilnadu State Council for Science and Technology, Chennai, Tamil Nadu, 600 025, India

    Michael Jothi Rajan

  6. Department of Chemistry, King Khalid University, Abha, 61413, Saudi Arabia

    Abdullah G. Al-Sehemi & Mehboobali Pannipara

  7. Faculty of Applied Sciences, UCSI University, Cheras, 56000, Kuala Lumpur, Malaysia

    Siew-Moi Phang

  8. Centre of Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia

    Md. Abdul Aziz

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  1. C. Karthikeyan
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Karthikeyan, C., Jenita Rani, G., Ng, FL. et al. 3D Flower–Like FeWO4/CeO2 Hierarchical Architectures on rGO for Durable and High-Performance Microalgae Biophotovoltaic Fuel Cells. Appl Biochem Biotechnol 192, 751–769 (2020). https://doi.org/10.1007/s12010-020-03352-4

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