Use of titanium dioxide nanoparticles biosynthesized by Bacillus mycoides in quantum dot sensitized solar cells

Microbial Cell Factories

Research

José Manuel Pérez-Donoso¹  Vicente María Durán-Toro²  Nicolás Alexis Órdenes-Aenishanslins²  Luis Alberto Saona²  Juan Pablo Monrás³  Denisse Margarita Bravo⁴ 

[1] Universidad Andres Bello, Bionanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biologicas, Republica # 239, Santiago, Chile;Universidad Andres Bello, Bionanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biologicas, Republica # 239, Santiago, Chile;Universidad de Chile, Facultad de Ciencias Químicas y Farmacéuticas, Sergio Livingstone Pohlhammer 1007, Santiago, Chile;Universidad Andres Bello, Bionanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biologicas, Republica # 239, Santiago, Chile;Universidad de Santiago de Chile, Facultad de Química y Biología, Alameda, 3363, Santiago, Chile;Universidad de Chile, Laboratorio de Microbiología Oral, Facultad de Odontologia, Sergio Livingstone Pohlhammer 943, Santiago, Chile;

关键词: Titanium dioxide nanoparticles;    QDSSC;    Phototoxicity;    Nanoparticle biosynthesis;   

DOI  :  10.1186/s12934-014-0090-7

 received in 2014-04-17, accepted in 2014-06-15,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundOne of the major challenges of nanotechnology during the last decade has been the development of new procedures to synthesize nanoparticles. In this context, biosynthetic methods have taken hold since they are simple, safe and eco-friendly.ResultsIn this study, we report the biosynthesis of TiO2 nanoparticles by an environmental isolate of Bacillus mycoides, a poorly described Gram-positive bacterium able to form colonies with novel morphologies. This isolate was able to produce TiO2 nanoparticles at 37°C in the presence of titanyl hydroxide. Biosynthesized nanoparticles have anatase polymorphic structure, spherical morphology, polydisperse size (40–60 nm) and an organic shell as determined by UV–vis spectroscopy, TEM, DLS and FTIR, respectively. Also, conversely to chemically produced nanoparticles, biosynthesized TiO2 do not display phototoxicity. In order to design less expensive and greener solar cells, biosynthesized nanoparticles were evaluated in Quantum Dot Sensitized Solar Cells (QDSSCs) and compared with chemically produced TiO2 nanoparticles. Solar cell parameters such as short circuit current density (ISC) and open circuit voltage (VOC) revealed that biosynthesized TiO2 nanoparticles can mobilize electrons in QDSSCs similarly than chemically produced TiO2.ConclusionsOur results indicate that bacterial extracellular production of TiO2 nanoparticles at low temperatures represents a novel alternative for the construction of green solar cells.

【 授权许可】

Unknown   
© Órdenes-Aenishanslins et al. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.