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Plasmonic SiO2/TiO2 aerogels degrade RhB
Anatase TiO2 grown in silica aerogels, then Ag@Au nanoshells, adsorbs and photocatalyzes rhodamine B far better than TiO2 powder.
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What matrix hosts the TiO2 photocatalyst?
A mesoporous silica aerogel from sodium silicate.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
At what temperature is anatase formed?
Calcination at 600 °C for 2 h.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
What TEM d-spacing confirms anatase (101)?
0.35 nm.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
What BET area does pure SiO2 aerogel have?
447.9 m2 g–1, with 8.1 nm average pores.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
How much RhB does the composite adsorb in the dark?
56%, versus 26% on SiO2 and 9% on TiO2 powder.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
Solar-light RhB conversion in 3 h with SiO2/TiO2?
76%, 6.3-fold the commercial TiO2 result (12%).
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
What band gap is reported for aerogel-hosted anatase?
2.3 eV versus 3.2 eV for typical anatase.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
How are Ag@Au nanoshells grown?
Ag seeds, then CTAB/HAuCl4/ascorbate seed-mediated growth.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
What average size are the Ag@Au structures?
About 97.5 nm by TEM.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
Why can extra Ag hurt photocatalysis?
Clogged pores, lower area, and faster electron–hole recombination.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified
Solar versus visible RhB pathways differ how?
Solar: N-de-ethylation plus chromophore cleavage; visible: mainly N-de-ethylation.
Source: Plasmon-Sensitized Silica-Titanium Aerogels as Potential Photocatalysts for Organic Pollutants and Bacterial Strains · DOI · quote verified