Hollow mesoporous silica materials with well-ordered cubic Ia3d mesostructured shell for toluene adsorption
| Autor: | Chi He, Xin Zhang, Jie Cheng, Hongling Yang, Nanli Qiao, Zhengping Hao |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Sorption 02 engineering and technology Mesoporous silica 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Toluene 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption chemistry Chemical engineering Mechanics of Materials Specific surface area Molecule General Materials Science 0210 nano-technology Mesoporous material |
| Zdroj: | Journal of Porous Materials. 26:59-68 |
| ISSN: | 1573-4854 1380-2224 |
| Popis: | In this work, hollow mesoporous silica samples (HMSs) with uniform diameter (≈ 400 nm), high specific surface area (1138–1742 m2/g) and stable structure were successfully synthesized. The shell of synthesized HMSs displays the well-ordered cubic Ia3d mesostructure with uniform mesopores of ca. 2.7 nm, and the shell thickness is easily adjusted in range from 30 to 80 nm. More importantly, the potential applications of HMSs are further demonstrated for adsorption capacity, toluene as the model molecule. HMSs exhibit remarkably higher adsorption capacity, especially HMS-3. The saturated adsorption amount toward toluene of HMS-3 can reach as high as 5.93 mmol/g that is almost two times larger than that of MCM-48 (2.74 mmol/g). In addition, Henry constants and adsorption kinetics date on HMS-3 and MCM-48 for toluene were also evaluated in detail. By a contrastive analysis, the good sorption capacity of HMS-3 for toluene could be ascribed to the unique interior voids and strong adsorption energy with each other. |
| Databáze: | OpenAIRE |
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