Photocatalytic and antibacterial properties of Au-decorated Fe3O4@mTiO2 core–shell microspheres

A mild synthetic route to Fe3O4@TiO2-Au composites: preparation, characterization and photocatalytic activity

“…The peaks located at 83.8 and 87.5 eV correspond to Au 0 4f 7/2 and Au 0 4f 5/2 , respectively. These results are consistent with the emission of 4f photoelectrons from zero-valent Au 0 [15,[39][40][41], which indicates that the Ag NPs deposited on the surface of the Fe 3 O 4 @TiO 2 spheres exist as metallic Au.…”

“…As listed in Table 1 M a n u s c r i p t 15 To assess the renewability of the Fe 3 O 4 @TiO 2 -Au under UV irradiation, the degradation of RhB was repeated under the same photocatalytic conditions and the results were shown in the inset in Fig. 6b.…”

“…Therefore, an essential step for the formation of anatase TiO 2 NPs on a Fe 3 O 4 surface involves calcination or a hydrothermal treatment at high temperature, which would diminish or even damage the magnetic functionality of the obtained composite particles [16][17][18]. Although many investigations have been focused on coating Au NPs onto an unfixed TiO 2 surface, few studies of the deposition of Au NPs on Fe 3 O 4 @TiO 2 to improve its photocatalytic properties have been reported [15].…”

“…To the best our knowledge, magnetic TiO 2 photocatalysts are primarily prepared using sol-gel method by directly coating Fe 3 O 4 particles with TiO 2 [9][10][11][12][13][14][15][16][17][18] or indirectly coating Fe 3 O 4 with a SiO 2 interlayer between Fe 3 O 4 and TiO 2 [18][19][20][21][22]. Unfortunately, the coated TiO 2 in these studies is nearly all amorphous, and amorphous TiO 2 is inactive as a photocatalyst under UV irradiation [23][24][25].…”

Reactive oxygen species (ROS) mediated enhanced anti-candidal activity of ZnS–ZnO nanocomposites with low inhibitory concentrations

“…[10][11] Semiconductors like TiO 2, ZnO, ZnS, etc are proven to be effective materials for the photocatalytic degradation of the organic compounds and disinfection of microbes. [12][13][14][15][16][17][18][19] ZnS is an important semiconductor whose theoretical photocarrier efficiency is much higher than TiO 2 . 20 It is one of the first semiconductors invented and has wide range of applications in electronic, optical, biomedical, and photovoltaic devices.…”