Synthesis and characterization of low-cost hierarchical porous silica by nanoemulsion templating: influence of nanoemulsion volume and hydrodynamic diameter

Hessien, Manal; Prouzet, Éric

doi:10.1007/s10971-021-05543-9

Cited by 1 publication

(1 citation statement)

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“…And TMB often exists as a pore spreading agent, which can change the spatial distribution of CTAB micelles and regulate the pore size. The O/W volume ratio affects characteristics of the synthesized nano-materials by changing the morphology of the microemulsions [34,38,39]. Therefore, we have investigated the effect of the O/W volume ratio (range between 0.025 and 0.045) on the size and morphology of DFNS particles in the water-1-pentanol microemulsion system.…”

Section: Effect Of 1-pentanol Addition Amount On Dfns Structurementioning

confidence: 99%

Tunable synthesis of dendritic fibrous nano silica using 1-pentanol-water microemulsion at low oil to water ratio

Liu¹,

Zhang²,

Chen³

et al. 2022

Nanotechnology

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Dendritic fibrous nanosilica (DFNS) is a suitable nano-carrier for loading pesticides with radially oriented pores and a large surface area. The microemulsion method is standard method to prepare DFNS, and 1-pentanol is taken to replace cyclohexane as an oil solvent due to its high stability and nontoxic property. The results showed that the volume ratio of 1-pentanol (oil) to water (O/W) and the molar ratio of hexadecyltrimethylammonium bromide (CTAB) to tetraethylorthosilicate (TEOS) had effected on morphology and adsorption properties of DFNS in the water-CTAB-1-pentanol-ethanol-trimethylbenzene (TMB) microemulsion system. DFNS with bicontinuous concentric lamellar morphologies can be synthesized in this microemulsion at the meager O/W volume ratio (0.025-0.045). It features a tight mesoporous structure with a thin dendritic fibrous in 0.03 to 0.04 O/W volume ratio. The particle sizes, surface areas, and porosity of DFNS were positively correlated with the addition of the silica precursor TEOS. The size of DFNS increased from 123 nm to about 220 nm with the CTAB/TEOS molar ratio decreasing from 0.119 to 0.050. When the molar ratio of CTAB to TEOS =0.119, DFNS has a smaller particle size(123 nm) with a larger surface area and abundant honeycomb mesopores; the low O/W volume ratio strategy provides theoretical support for the industrialization development of DFNS and nano-pesticides, which plays a profound role in promoting the sustainable development of pesticide reduction, efficiency and green agriculture.

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Section: Effect Of 1-pentanol Addition Amount On Dfns Structurementioning

confidence: 99%