Impact of heteroatom addition into mesoporous silica for water adsorption in the low partial pressure range.

ABSTRACT: Mesoporous silicas are known to be high-performing water adsorbents in high humidity levels due to their large pore volumes. However, for low humidity conditions, these materials typically present a less expressive performance, which is a drawback for many applications. In the present report, mesoporous silica SBA-15 was functionalized with Al, Ti, Zr and Li in order to improve their performance in this condition. The influence of functionalization in porosity, morphology and acidic sites was investigated. Samples with an increased number of acidic sites and with higher microporosity when compared to pure silica were produced. This was responsible for their enhanced performance for water adsorption in low moisture conditions. Sample functionalized with zirconium in SBA-15 synthesis improve

SUBMITTER: de O N Ribeiro J 

PROVIDER: S-EPMC8370461 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature