Large scale photochemical synthesis of M@TiO2 nanocomposites (M = Ag, Pd, Au, Pt) and their optical properties, CO oxidation performance, and antibacterial effect

By Shaofeng Chen, J. Li, Kun‐Yu Qian, Wei Ping Xu, Yang Lu, W. Huang, Shukai Yu. 2010

278 citations recorded by the source corpus.

AbstractWell-dispersed M@TiO2 (M = Ag, Pd, Au, Pt) nanocomposite particles with a diameter of 200–400 nm can be synthesized on a large scale by a clean photochemical route which does not require any additives using spherical rutile nanoparticles as a support. The sizes of Pt, Au, and Pd nanoparticles formed on the surface of TiO2 particles are about 1 nm, 5 nm, and 5 nm, respectively, and the diameter of Ag nanoparticles is in the range 2–20 nm. Moreover, the noble metal nanoparticles have good dispersity on the particles of the TiO2 support, resulting in excellent catalytic activities. Complete conversion in catalytic CO oxidation is reached at temperatures as low as 333 and 363 K, respectively, for Pt@TiO2 and Pd@TiO2 catalysts. In addition, the antibacterial effects of the as-synthesized TiO2 nanoparticles, silver nanoparticles, and Au@TiO2 and Ag@TiO2 nanocomposites have been tested against Gram-negative Escherichia coli (E. coli) bacteria. The results demonstrate that the presence of the TiO2 matrix enhances the antibacterial effect of silver nanoparticles, and the growth of E. coli can be completely inhibited even if the concentration of Ag in Ag@TiO2 nanocomposite is very low (10 μg/mL).

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/e4ce67ec80dd90a81d436f976b874fe3f9ab54cf

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In Materials Chemistry

1. Yadong Yin
2. Qiao Zhang
3. Michael Dahl
4. Fenfen Jing
5. Na Qin
6. Ruowen Liang
7. Lijuan Shen
8. Ling Wu

In Renewable Energy, Sustainability and the Environment

1. Yadong Yin
2. Qiao Zhang
3. Ling Wu
4. Michael Dahl
5. J. Joo

Citations in the corpus

• M@MIL-100(Fe) (M = Au, Pd, Pt) nanocomposites fabricated by a facile photodeposition process: Efficient visible-light photocatalysts for redox reactions in water (2015, background): “2(d)) should be assigned to the binding energies of Pt 4f7/2 and Pt 4f5/2 of metallic Pd0, respectively [31, 32].”
• Metal-core@metal oxide-shell nanomaterials for gas-sensing applications: a review (2015, background): “…2013), magnetic (Chen et al. 2012), optics (Liu et al. 2007), electrics (Khafagy 2011), chromatography (González-Ruiz et al. 2015), water treatment (Thatai et al. 2014), solar cells (Karaagac et al. 2013), supercapacitor (Ponrouch et al. 2013), optical, biological (Chen et al. 2010), and so on.”
• Self-assembly and photocatalysis of mesoporous TiO2 nanocrystal clusters (2011, background): “[15] Chen, S.”