Biosynthesis of titanium dioxide nanoparticles using a probiotic from coal fly ash effluent

Babitha, S.; Korrapati, Purna Sai

doi:10.1016/j.materresbull.2013.08.016

Cited by 39 publications

(30 citation statements)

References 15 publications

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“…The observed absorption spectrum coincides with those obtained with titanium dioxide nanoparticles produced by chemical methods, with a broad absorption band in the UV range and the cut off wavelength near 380 nm ( Figure 4) [27,28,38,39]. The obtained UV-vis spectra of biosynthesized TiO 2 nanoparticles was used to determine the band gap (E bg ) by the Tauc relation [40].…”

Section: Uv-visible Spectroscopy and Tauc Plot Analysissupporting

confidence: 73%

“…Biosynthesized TiO 2 nanoparticles display a size between 40-60 nm and spherical morphology ( Figure 2). The size distribution histogram indicates a high polydispersity of the sample; which is a common behavior of NPs produced by biosynthetic methods [23,24,27]. This result suggests that nanoparticles are produced by cells at different times after addition of titanyl hydroxide.…”

Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 75%

“…In addition, most applications of biosynthesized TiO 2 nanoparticles tested to date are based on their toxic properties against pathogens such as bacteria [23,25] and mites [26]. Furthermore, in vivo and in vitro biocompatibility studies [27] have been carried out and their biocidal/photocatalytic activity on aquatic biofilms has been evaluated [28] (Table 1). No reports regarding the application of biosynthesized titanium dioxide nanoparticles in energy devices have been published to date ( Table 1).…”

Section: Introductionmentioning

confidence: 99%

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Use of titanium dioxide nanoparticles biosynthesized by

Órdenes-Aenishanslins

Saona

Durán-Toro

et al. 2014

Microb Cell Fact

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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.

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Section: Uv-visible Spectroscopy and Tauc Plot Analysissupporting

confidence: 73%

Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Use of titanium dioxide nanoparticles biosynthesized by

Órdenes-Aenishanslins

Saona

Durán-Toro

et al. 2014

Microb Cell Fact

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“…The biocompatibility of biogenically synthesized TiO2 nanoparticles was reported by Babitha et al [106]. TiO2 nanoparticles were obtained by a metal-resistant bacterium isolated from coal fly ash effluent.…”

Section: Titanium Dioxide (Tio2) Nanoparticlesmentioning

confidence: 90%

“…These effects may be linked to the depleted uranium doses and independent of the solubility of uranium oxide [106]. The biotransformations of uranyl salts are an important way to avoid environment contamination, and the presence of protein capping on the surface of biogenically synthesized UO2 nanoparticles can avoid posterior metal solubilization [63].…”

Section: Uraninite (Uo2) Nanoparticlesmentioning

confidence: 99%

Nanotoxicology of Metal Oxide Nanoparticles

Seabra

Durán

2015

Metals

179

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This review discusses recent advances in the synthesis, characterization and toxicity of metal oxide nanoparticles obtained mainly through biogenic (green) processes. The in vitro and in vivo toxicities of these oxides are discussed including a consideration of the factors important for safe use of these nanomaterials. The toxicities of different metal oxide nanoparticles are compared. The importance of biogenic synthesized metal oxide nanoparticles has been increasing in recent years; however, more studies aimed at better characterizing the potent toxicity of these nanoparticles are still necessary for nanosafely considerations and environmental perspectives. In this context, this review aims to inspire new research in the design of green approaches to obtain metal oxide nanoparticles for biomedical and technological applications and to highlight the critical need to fully investigate the nanotoxicity of these particles. OPEN ACCESSMetals 2015, 5 935

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