The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Role of Fe Doping in Tuning the Band Gap of TiO2 for the Photo-Oxidation-Induced Cytotoxicity Paradigm
Open accessAbstract
UV-light-induced electron-hole (e(-)/h(+)) pair generation with free radical production in TiO(2)-based nanoparticles is a major conceptual paradigm for biological injury. However, to date, this hypothesis has been difficult to experimentally verify due to the high energy of UV light that is intrinsically highly toxic to biological systems. Here, a versatile flame spray pyrolysis (FSP) synthetic process has been exploited to synthesize a library of iron-doped (0-10 wt%) TiO(2) nanoparticles. These particles have been tested for photoactivation-mediated cytotoxicity using near-visible light exposure. The reduction in TiO(2) band gap energy with incremental levels of Fe loading maintained the nanoparticle crystalline structure in spite of homogeneous Fe distribution (demonstrated by XRD, HRTEM, SAED, EFTEM, and EELS). Photochemical studies showed that band gap energy was reciprocally tuned proportional to the Fe content. The photo-oxidation capability of Fe-doped TiO(2) was found to increase during near-visible light exposure. Use of a macrophage cell line to evaluate cytotoxic and ROS production showed increased oxidant injury and cell death in parallel with a decrease in band gap energy. These findings demonstrate the importance of band gap energy in the phototoxic response of the cell to TiO(2) nanoparticles and reflect the potential of this material to generate adverse effects in humans and the environment during high-intensity light exposure.
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Cites
Environmental applications of semiconductor photocatalysis
Hoffmann, M. R., Martin, S. T., Choi, W., & Bahnemann, D. W. (1995) · Chemical Reviews · doi:10.1021/cr00033a004 · Cited by 18,495
Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results
Linsebigler, A. L., Lu, G., & Yates, J. T. (1995) · Chemical Reviews · doi:10.1021/cr00035a013 · Cited by 11,575
Surface Science Studies of the Photoactivation of TiO 2 New Photochemical Processes
Thompson, T. L., & Yates, J. T. (2006) · Chemical Reviews · doi:10.1021/cr050172k · Cited by 2,064
Cited by
Li, S., Ren, Y., Biswas, P., & Tse, S. D. (2016) · Progress in Energy and Combustion Science · doi:10.1016/j.pecs.2016.04.002 · Cited by 361
Titanium Dioxide in the Service of the Biomedical Revolution
Rajh, T., Dimitrijevic, N. M., Bissonnette, M., Koritarov, T., & Konda, V. (2014) · Chemical Reviews · doi:10.1021/cr500029g · Cited by 293
Nanosensitizer-mediated augmentation of sonodynamic therapy efficacy and antitumor immunity
Li, Y., Chen, W., Kang, Y., Zhen, X., Zhou, Z., Liu, C., Chen, S., Huang, X., Liu, H.-J., Koo, S., et al. (2023) · Nature Communications · doi:10.1038/s41467-023-42509-7 · Cited by 235
Metadata
- Authors
- George, S., Pokhrel, S., Ji, Z., Henderson, B. L., Xia, T., Li, L., Zink, J. I., Nel, A. E., & Mädler, L.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-07-01
- Volume
- 133
- Issue
- 29
- Pages
- 11270-11278
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2146772039
- Cited by
- 405
- References
- 3
- FWCI
- 7.49
- Type
- journal article
- Language
- en
- Open access
- green
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