Abstract
Using a virus as a template to synthesize nanomaterial is a simple, green, and controllable method to acquire unique structure nanoparticles. In this study, CdS nanowires were synthesized using the tobacco mosaic virus (TMV) as a template and for deposition in the inner center channel of TMV. TMV/CdS was successfully characterized, with the results showing a diameter of 4.0 nm, a cubic-phase composition, and strong fluorescence emission peaks, with an absorption edge of 566 nm and bandgap energy of 2.28 eV. The bandgap energy is narrower than that of template-free CdS. Furthermore, TMV/CdS exhibited an increased transient photocurrent, which was attributed to the effective separation of electron-hole pairs. The photoactivities of TMV/CdS and template-free CdS were tested; the results showed that the TMV/CdS had a better performance in methylene blue (MB) photodegradation, indicating that the photoactivity of TMV/CdS was higher than that of the template-free CdS. Further research on TMV/CdS regarding the photocatalytic mechanism showed that O2•− and •OH were the major species involved in photocatalysis, rather than holes (h+). Therefore, TMV/CdS might have applications as a novel visible-light-responsive photocatalyst.
Key points
• CdS nanowires were firstly synthesized in the inner center channel of TMV
• TMV/CdS presented higher photocatalytic efficiency compared with template-free CdS
• The O 2 •− and • OH were responsible for the photocatalytic reaction of TMV/CdS
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The work was supported by the Fundamental Research Funds for the Central Universities (No. 2572020AW31 and No. 2572019AA19).
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YY, KY, and JYW performed the experiments and analyzed the data. YY, MZ, and DZC wrote the manuscript. MZ and DZC designed the experiments and provided lab space and funding for this work. All authors read and approved the manuscript.
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Yang, Y., Yang, K., Wang, J. et al. Fabrication and characterization of CdS nanowires templated in tobacco mosaic virus with improved photocatalytic ability. Appl Microbiol Biotechnol 105, 8255–8264 (2021). https://doi.org/10.1007/s00253-021-11596-1
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DOI: https://doi.org/10.1007/s00253-021-11596-1