Significant Promotion of Morphology in Fabricating Efficient Environment Protector

Abstract

A new strategy of morphology control was applied for mesoporous silica SBA-15 to fabricate efficient environment protector, and the micro-and macro-morphology of SBA-15 were simultaneously controlled in weak acidic condition by using citric acid. Through simply tuning the synthetic temperature, monolithic SBA-15 materials with tunable macroporous structure was fabricated by using mild shearing force field in the citric acid route. Owning to the strong promotion of special morphology, the SBA-15 monolith can efficiently eliminate the phenol from environmental tobacco smoke (ETS), and the reduction ratio is twice higher than that by tetraethylenepentamine (TEPA) modified powder-like SBA-15. These results indicated that morphology of mesoporous materials played a dominant role in environmental purification.

A Co3O4–CeO2 functionalized SBA-15 monolith with a three-dimensional framework improves NOx-assisted soot combustion

“…5a has three diffraction peaks indexed as (100), (110) and (200) plane respectively, corresponding to the well-ordered meso-structure with a 2D symmetry (p6mm). 21 These three peaks almost disappear in the low-angle XRD patterns of the n-Co 0.2 Ce 0.8 /SM catalysts except for 0.5-Co 0.2 Ce 0.8 /SM which remains (100) plane, indicating the decrease of ordered degree due to the occupation of the SBA-15 channels by Co 3 O 4 -CeO 2 particles, which is consistent with the results of N 2 adsorption and TEM analysis. The wide-angle XRD patterns of Co 3 O 4 -CeO 2 and the n-Co 0.2 Ce 0.8 /SM (Fig.…”

In Situ Preparation of Au‐SH@SO3H‐SBA‐15 Catalyst with Enhanced Activity and Durability in Alkyne Hydration

“…[25] According to the 13 C CP MAS NMR spectrum, the Au-SH@SO 3 H-SBA-15 sample displayed three weak signals around δ 10, 16, and 56, corresponding to three carbon atoms in the HO 3 SCH 2 CH 2 CH 2 -group. [29,30] The low-angle XRD patterns showed an intense diffraction around 2θ ＝0.9°-1.0° characteristic of the ordered 2D P6mm hexagonal mesoporous structures, [31] which could be further confirmed by the TEM images ( Figure 6), which clearly showed the ordered mesoporous channels in the Au-HS@SO 3 H-SBA-15 catalyst. [27,28] As shown in Figure 5, both the SH-SBA-15 and the Au-SH@SO 3 H-SBA-15 displayed typical IV type N 2 adsorption-desorption isotherms with an H 1 -type hysteresis loop indicative of the mesoporous structure.…”

A non‐cross‐linked CO2 foam fracturing fluid with low friction

“…[ 2–5 ] Therefore, foam fracturing is an option for reservoir reconstruction. [ 6–8 ] CO 2 is usually employed as the internal phase of foam fracturing fluids. Using CO 2 to form foam fracturing fluid is an important method of CO 2 usage and storage in the carbon neutrality era.…”