Tunable porous silica nanoparticles as a universal dye adsorbent

Abstract

Adsorption of cationic and anionic dyes (A) MO, (B) BCG, (C) RB, and (D) MB by optimized calcined porous silica nanoparticles.

Ultrasmall aqueous starch-capped CuS quantum dots with tunable localized surface plasmon resonance and composition for the selective and sensitive detection of mercury(ii) ions

“…In our previous work, we reported that temperature can be used to tune the surface properties of porous silica nanoparticles. 38 Therefore, the facile tunable LSPR and thermal stability of these CuS QDs opens the door to their use as light harvesting materials and in photothermal therapy. It is imperative to highlight the energy band structure, which is the difference between the bottom of the conduction band (CB) and the highest occupied state in the valence band (VB).…”

A Novel Au@Cu2O-Ag Ternary Nanocomposite with Highly Efficient Catalytic Performance: Towards Rapid Reduction of Methyl Orange Under Dark Condition

“…Nowadays, a series of post/pre-treatment methods have been proposed to remove the azo dyes from the wastewater [1,[9][10][11]. Porous/activated carbons have been applied as commercial adsorbents for the wastewater treatment thanks to their high capacity for adsorbing pollutants.…”

“…Pargoletti et al synthesized activated carbon-based MnO 2 nanoparticles by hydrothermal method and realized the adsorption and degradation of MO [13]. Unfortunately, regeneration difficulties, high cost, high carbon emission, and large losses of carbon source restrict their practical application [9]. Alternatively, ZnO and TiO 2 semiconductor photocatalysts have been extensively employed to catalyze and reduce azo dyes based on their superiority, such as nontoxicity, low cost, and availability [14].…”

Anisotropic silica coating on gold nanorods boosts their potential as SERS sensors

“…There is now a strong peak at ∼240 cm −1 , and 655 cm −1 which correspond to Au-N or Au-S stretch and the C-S-C deformation mode, respectively. 47,54 The major peaks relating to the C-N-C mode are absent as well, which indicates a different conformation is required for the methylene blue to enter the silica pore and the molecule sits with the sulfur containing group directed towards the surface. This evidence supports the notion that electrostatics govern this analyte-SERS substrate interaction, and modification of the porous membrane can be used to control which types of molecules can access the AuNR surface.…”