Functionalisation of alkali-resistant nanoporous glass via Au nanoparticle decoration using alkaline impregnation: catalytic activity for CO removal

• Published in: RSC advances Vol. 14; no. 12; pp. 8214 - 8221
• Main Authors: Tada, Kohei, Tsujiguchi, Masato, Tominaga, Takumi, Iwao, Masaru, Sakurai, Hiroaki, Jin, Tetsuro, Maeda, Yasushi
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 06.03.2024; The Royal Society of Chemistry
• Subjects: Acid resistance; Air purification; Carbon monoxide; Catalysts; Catalytic activity; Chemistry; Gas sensors; Glass; Gold; Metal particles; Nanoparticles; Oxidation; Titanium dioxide
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d3ra07333e

The concerted use of nano-metal particles with catalytic functions and nanoporous materials holds promise for effective air purification and gas sensing; however, only a few studies have used porous glasses as supports for Au nanoparticles. Furthermore, Au/nanoporous glasses with activities comparable to that of Au/TiO , which is a typical Au catalyst, have not been reported to date. This study demonstrates that a nanoporous glass, which is highly acid- and alkali-resistant and chemically stable, can be decorated with Au nanoparticles using an alkali impregnation method. The resulting composite exhibits high catalytic activity in CO oxidation. The catalysts reported herein are as active as Au/TiO catalysts per active site. Further optimisation of the pore properties of the glass and sizes of the Au nanoparticles is expected to result in excellent catalytic systems for CO removal and sensing.