Abstract
Ultralight graphene foams have recently attracted attention due to their unique properties and applications, but few analogues of metal oxides possible to prepare. Here, a new monolith of three-dimensional titania has been prepared for the first time by a simple lyophilization treatment of exfoliated titanate nanosheets in colloidal suspension. The robust and shape-formable foam is of a density as low as 5 mg cm-3. It possesses a porous layered architecture, large interlayer spacing, and large and negatively charged specific surface area, which exhibits excellent hygroscopicity and capacity for metal cation adsorption. In both mechanical compression and heavy metal ion absorption from water, it demonstrates remarkable recyclability and fast kinetics, capable of full recovery and repeated operation. Significantly outperforming all other inorganic sorbents, it may find applications in decontamination/enrichment/recovery of toxic, radioactive and valuable metal ions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 15724-15729 |
| Number of pages | 6 |
| Journal | JOURNAL OF MATERIALS CHEMISTRY A |
| Volume | 5 |
| Issue number | 30 |
| DOIs | |
| State | Published - 2017 |
Bibliographical note
Funding Information:This work is financially supported by the National key research and development program (Grant no. 2016YFB0901600), National Natural Science Foundation of China (Grant no. 61376056 and 51502331), and Shanghai Technical Platform for Testing and Characterization on Inorganic Materials (14DZ2292900).
Publisher Copyright:
© 2017 The Royal Society of Chemistry.
ASJC Scopus subject areas
- General Chemistry
- Renewable Energy, Sustainability and the Environment
- General Materials Science
