Open Access

ARTICLE

Experimental Study of Microalgae Cultivation under Selective Illumination by Ag/CoSO₄ for Bioelectrode Materials Preparation

by Kai Zhu¹, Hao Chen^1,*, Shuang Wang^1,*, Chuan Yuan^1,2, Bin Cao³, Jun Ni¹, Lujiang Xu⁴, Anqing Zheng⁵, Arman Amani Babadi¹

1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China
2 School of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China
3 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, 212013, China
4 Biomass Group, College of Engineering, Nanjing Agricultural University, Nanjing, 210031, China
5 Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China

* Corresponding Authors: Hao Chen. Email: ; Shuang Wang. Email:

Journal of Renewable Materials 2023, 11(6), 2849-2864. https://doi.org/10.32604/jrm.2023.026317

Received 30 August 2022; Accepted 04 November 2022; Issue published 27 April 2023

Abstract

Microalgae biomass is an ideal precursor to prepare renewable carbon materials, which has broad application. The bioaccumulation efficiency (lipids, proteins, carbohydrates) and biomass productivity of microalgae are influenced by spectroscopy during the culture process. In this study, a bilayer plate-type photobioreactor was designed to cultivate Chlorella protothecoides with spectral selectivity by nanofluids. Compared to culture without spectral selectivity, the spectral selectivity of Ag/CoSO₄ nanofluids increased microalgae biomass by 5.76%, and the spectral selectivity of CoSO₄ solution increased by 17.14%. In addition, the spectral selectivity of Ag/CoSO₄ nanofluids was more conducive to the accumulation of nutrients (29.46% lipids, 50.66% proteins, and 17.86% carbohydrates) in microalgae. Further cultured chlorella was utilized to prepare bioelectrode materials, it was found that algal based biochar had a good pore structure (micro specific surface area: 1627.5314 m²/g, average pore size: 0.21294 nm). As the current density was 1 A/g, the specific capacitance reached 230 F/g, appearing good electrochemical performance.

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