Enhanced CO2 reduction and valuable C2+ chemical production by a CdS-photosynthetic hybrid system

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Bo Wang
  • Zhifeng Jiang
  • Jimmy C. Yu
  • Jianfang Wang
  • Po Keung Wong

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)9296-9301
Journal / PublicationNanoscale
Volume11
Issue number19
Early online date17 Apr 2019
Publication statusPublished - 21 May 2019

Abstract

Semi-artificial photosynthesis is an emerging technique in recent years. Here, we presented an inorganic-biological hybrid system composed of photosynthetic Rhodopseudomonas palustris and CdS nanoparticles coated on the bacterial surface. Under visible light irradiation, the CO2 reduction and valuable C2+ chemical production of R. palustris could be promoted by the photo-induced electrons from the CdS NPs. The increased energy-rich NADPH cofactor promoted the generation of the Calvin cycle intermediate, glyceraldehyde-3-phosphate. As a result, the production of solid biomass, carotenoids and poly-β-hydroxybutyrate (PHB) was increased to 148%, 122% and 147%, respectively. The photosynthetic efficiency (PE) of CdS-R. palustris was elevated from the original 4.31% to 5.98%. The surface loaded NP amount and the material-cell interface both played important roles in the efficient electron generation and transduction. The CdS-R. palustris hybrid system also exhibited a survival advantage over its natural counterparts under the autotrophic conditions. Under a practical solar/dark cycle, the produced biomass, carotenoid and PHB from the hybrid system also reach 139%, 117% and 135%, respectively. The CdS-photosynthetic hybrid system represents a powerful and expandable platform for advanced CO2 reduction and solar-to-chemical (S2C) conversion.

Citation Format(s)

Enhanced CO2 reduction and valuable C2+ chemical production by a CdS-photosynthetic hybrid system. / Wang, Bo; Jiang, Zhifeng; Yu, Jimmy C.; Wang, Jianfang; Wong, Po Keung.

In: Nanoscale, Vol. 11, No. 19, 21.05.2019, p. 9296-9301.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review