Mixed anionic surfactant-templated mesoporous silica nanoparticles for fluorescence detection of Fe³⁺

Abstract

This work demonstrates a novel method for the synthesis of large pore mesoporous silica nanoparticles (MSNs) with a pore diameter of 10.3 nm and a particle diameter of ∼50 nm based on the incorporation of mixed anionic surfactants sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulphate (SDS) as the template in the synthesis process. The dispersity, morphology, pore structure and size of mesoporous nanoparticles were adjusted by changing the molar ratio of two anionic surfactants, the concentration of the co-structure-directing agent (3-aminopropyltrimethoxysilane) and the reaction temperature. The results of synthesis experiments suggested that the formation of large pore MSNs involved a nucleation and growth process. MSNs were post-grafted with a Schiff base moiety for fluorescence sensing of Fe(3+) in water. The applicability of functionalized MSNs was demonstrated by selective fluorescence detection of Fe(3+) in aqueous media.

How to develop molecularly imprinted mesoporous silica for selective recognition of analytes in pharmaceutical, environmental, and food samples

“…Anionic surfactant mixtures have been used for mesoporous silica synthesis. Gai et al 73 used a mix of SDBS and SDS as a template. Adding SDBS to SDS greatly improved the morphology and pore structure of the MSNs.…”

Synthesis of size-controlled and highly monodispersed silica nanoparticles using a short alkyl-chain fluorinated surfactant

“…Some other surfactants were also reported to prepare silica particles with different size, shape, morphology, and surface areas. [50][51][52][53] Typical anionic surfactants include sodium dodecyl sulfate (SDS), sodium oleate (SO), sodium dodecyl benzene sulfonate (SDBS). Cationic surfactants include dodecytrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), while non-ionic surfactants include Igepal CO-520 [polyoxyethylene (5) nonylphenylether, branched] and Brij 30 [polyoxyethylene(4) dodecyl ether, C12E4].…”

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

“…A schematic representation of the various synthetic approaches for the amine‐functionalized mesoporous silica is shown in Figure . Gai et al . introduced novel methods for synthesizing large pore mesoporous silica nanoparticles (MSNs) with amine functional groups via co‐condensation using APTS and the conventional silica source such as TEOS.…”