Programmed synthesis of magnetic mesoporous silica nanotubes with tiny Au nanoparticles: a highly novel catalyst system

Biofunctionalized MnFe2O4@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

“…Interestingly, the spectrum does not show any detectable Cl signal which usually within the bonding energy ranges from 196 to 204 eV. Thus it proves that there is a complete reduction of Au (III) to Au (0) onto Mf which is very well confirmed from TEM analysis [43][44][45][46]. The O1s peak (531.9 eV) can be seen which corresponds to the surface component oxygen atoms.…”

Preparation of polymer microspheres with reactive epoxy group and amino groups as stabilizers for gold nanocolloids with recoverable catalysis

“…5b, which was easily an accessible state for 4-NP and BH 4 − reductant during the catalysis. The catalytic rate in the present work was comparative to those of the inorganic oxide-supported Au NPs for this reaction, for example, 2.5×10 −3 s −1 of mesoporous titania fibers supported Au [45], 5.3×10 −3 s −1 of magnetic mesoporous silica nanotube stabilized Au [46], and lower than 1.20× 10 −2 s −1 of imidazolium ionic liquid modified fibrous silica microsphere-loaded Au nanoparticles [47]. However, the complex procedure and residual impurities of porous inorganic architectures would limit its wide application as an efficient catalyst.…”

Mesoporous titanium dioxide coating on gold modified silica nanotubes: a tube-in-tube titanium nanostructure for visible-light photocatalysts

“…29 The elemental mapping had been performed to reveal the element distribution in the mSiNTs-N/Au@TiO 2 (Fig. 6,31,32 The pore size was calculated by using the BJH method, as shown in the inset of Fig. The mapping results indicated that the elements Si, O, Au and Ti spread evenly in the tubular composite, which confirmed the structure of mSiNTs-N/Au@TiO 2 as obtained by the programmed synthesis.…”

“…6 For the surface modification, the obtained mSiNTs (50 mg) was further diluted with isopropyl alcohol (50 mL) containing 3-aminopropyltriethoxysilane (3-APTES, 0.1 mL) under ultrasonication and heated to 80 °C for 2 h to functionalize the mSiNTs surface with -NH 2 groups. 6 For the surface modification, the obtained mSiNTs (50 mg) was further diluted with isopropyl alcohol (50 mL) containing 3-aminopropyltriethoxysilane (3-APTES, 0.1 mL) under ultrasonication and heated to 80 °C for 2 h to functionalize the mSiNTs surface with -NH 2 groups.…”

“…9 Second, mesostructured nanotubes maintain a specific surface area on the level of fine pore systems. 6,14,15 In particular, silicate nanomaterials can be used as a highly efficient adsorbent to adsorb organic pollutants. 11 In recent years, appreciable efforts have been made to develop nanostructured multifunctional composite materials to degrade organic pollutants (e.g., azo dyes) in waste water.…”