Functionalization of SBA-15 with CeO₂ nanoparticles for adsorptive desulfurization: Matters of template P123

Abstract

Adsorption is one of the most promising methods for desulfurization of transportation fuels, due to the strategy which enables removal of organic sulfur compounds to be conducted at ambient conditions with high efficiency. Adsorbent is the key to the adsorptive performance. Both p complexation and direct sulfur metal bonds are efficient methods for adsorptive desulfurization. For construction of these bonds, it is necessary to introduce active metal species on the support. In this work, Ce(NO 3 ) 2 was directly introduced into the assynthesized SBA-15, and high dispersion of CeO 2 nanoparticles was obtained. With the loading content of 12-46 wt%, the particle sizes of the CeO 2 NPs are in the range of 4.4-6.3 nm. The good dispersion status of CeO 2 nanoparticles is contributed to the template P123 preserved in as-synthesized SBA-15, which provides a confined space for the dispersion of CeO 2 nanoparticles. However, the large CeO 2 particles (7.0 nm) are formed for the sample originated from templatefree SBA-15. We also demonstrate that the adsorptive performance of SBA-15 is enhanced with the modification of CeO 2 nanoparticles. Besides, the performances of CeO 2 nanoparticlemodified samples stay in step with the dispersion status of the CeO 2 nanoparticles.

Green Synthesis for MCM-41 and SBA-15 Silica Using the Waste Mother Liquor

“…All BET surface area values for the MCM-41 and SBA-15 samples are in line with those found in the literature [57][58][59][60].…”

Green Synthesis for MCM-41 and SBA-15 Silica Using the Waste Mother Liquor

“…However, all of these values are in accordance with that found in the literature [5] and indicate a greater thermal and hydrothermal stability than that to MCM-41. All BET surface area values for the MCM-41 and SBA-15 samples are in line with those found in the literature [57][58][59][60]. From the thermogravimetric curves of the samples of the synthesized MCM-41 represented in Fig.…”

P123-Modified Synthesis of BiOCl Nanosheet/Bismuth Nitrate Heterojunctions for Photocatalytic Pollutant Degradation

“…In Figure S7b, the FT-IR peaks at 525 and 1459 cm –1 in BOC-1, 2, and 3 samples are attributed to Bi–O and Bi–Cl, respectively. ,, The peaks at 722, 812, 1041, and 1292 cm –1 are assigned to the symmetric and asymmetric stretching vibrations of the nitro group, but they were not found in BOC-1 and BOC-2 probably due to the low content of bismuth nitrate. The characteristic peaks of P123 at around 1350–1500 cm –1 could be found in BOC-1, BOC-2, and BBN-4 samples, which indicated the existence of uncleared P123 in samples.…”