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Self-assembly of honeycomb-like calcium-aluminum-silicate-hydrate (C-A-S-H) on ceramsite sand and its application in photocatalysis.
- Source :
-
Chemical Engineering Journal . Jul2018, Vol. 344, p583-593. 11p. - Publication Year :
- 2018
-
Abstract
- In recent years, stabilization and dispersion of catalysts and adsorbents have been widely studied in the field of air and water pollution treatment. In this paper, a novel functional carrier, ceramsite sand (CS) with honeycomb-like C-A-S-H (CSHC) was synthesized by spontaneous self-assembly of C-A-S-H. The self-assembly conditions, mechanisms and physicochemical properties of honeycomb-like C-A-S-H were studied in detail. The results show that C-A-S-H on the surface of CS has a honeycomb-like structure comprising numerous nanoscale cells in the range of 50–300 nm, which results in an increase of the specific surface area by more than 46 times. In addition, Ag/AgBr loaded ceramsite sand with honeycomb-like C-A-S-H (ACSHC) was prepared for further application. The Ag/AgBr nanoparticles were homogenously embedded into the honeycomb-like structure of C-A-S-H with a close and robust contact. Therefore, the photocatalytic efficiency of ACSHC is improved significantly and remains nearly 100% after 5 months. The results suggest that the novel self-assembly C-A-S-H with a honeycomb-like structure could provide a high specific surface area, good pore structure and more active sites. It is a promising functional carrier for catalysts or adsorbents in the field of air and water pollution treatment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 344
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 129205716
- Full Text :
- https://doi.org/10.1016/j.cej.2018.03.074