Synthesis of mesoporous silica microsphere from dual surfactant

Abstract

A new procedure is reported to synthesis mesoporous silica micro sphere for the first time. In these method two surfactants namely Span 80 and Tween 80 were used. Small angle X ray diffraction and N2 adsorption analysis shows the synthesized material has mesoporous property. The material has spherical morphology with 1-10 µm particle size. Beside the material found to have microcapsule property as observed from the Transmission electron microscopy. The Fourier transform Infrared spectroscopic analysis reveals that the materials are similar to other mesoporous materials. We also encapsulated an UV-absorber Ibuprofen inside the microcapsule, by mixing it before the synthesis. This shows a possibility of the materials in cosmetic applications.

Riboflavin adsorption onto multi-modal mesoporous carbon synthesized from polyethylene glycol 400

“…A high peak around 2h = 1.0°indicates mesostructures presence within the materials. The similar pattern was reported by Narayanan (2008) on the preparation of mesoporous silica microspheres using Span 80 and Tween 80 surfactants [18]. No significant change in the XRD pattern ( Fig.…”

Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media

“…The actual yield was 90 % with respect to the theoretical yield of precipitated silica. The total weight of silica (SiO 2 ) present in whole sodium silicate was taken as the theoretical yield, as it is stated in [26]. The target metal concentration was 10 or 24 wt%.…”

“…Hence, the use of heterogeneous copper catalysts is often advantageous from the perspective of process development due to their easy handling, stability, effortless recovery and recycling [16,19,21,22,23,24,25]; the selection of the support is a crucial point to achieve these advantages. Cu NPs have been applied in nitroarene reduction immobilized onto various supports, including graphene [23], cellulose nanofibers [16] and magnetic carbon materials [26]. Mesoporous oxides are excellent examples of a good support, combining a high specific surface area with an ordered structure of wide pores and allowing a high concentration of active sites with free diffusion of reactants and products.…”

Synthesis of the Coumarin-Containing Porous Silica as Column Packing Material

“…2 The general synthetic procedure of synthesis of the coumarin functionalized porous silica Fig. 3 FTIR spectra of the silica, amino functionalized silica, coumarin based silica and coumarin J Inorg Organomet Polym coumarin group on the silica surface shows the absorbance appeared at 3542 and 3434 cm -1 that was assigned to Ar-OH, 3088 cm -1 to aromatic C-H group, 1668 cm -1 to -C=O group of coumarin ring and 1611 cm -1 to -C=C-bound [23,24]. Powder X-ray diffraction patterns of pure silica, aminopropyl functionalized silica and coumarin based silica are shown in Fig.…”