Layered Double Hydroxide (LDH)-based Monolith with Interconnected Hierarchical Channels: Enhanced Sorption Affinity for Anionic Species
Journal of Materials Chemistry A Volume 1
Page 7702-7708
published_at 2013-04-24
アクセス数 : 117 件
ダウンロード数 : 55 件
今月のアクセス数 : 8 件
今月のダウンロード数 : 4 件
この文献の参照には次のURLをご利用ください : https://ir.lib.hiroshima-u.ac.jp/00053535
| File | |
| Title ( eng ) |
Layered Double Hydroxide (LDH)-based Monolith with Interconnected Hierarchical Channels: Enhanced Sorption Affinity for Anionic Species
|
| Creator |
Tokudome Yasuaki
Nakanishi Kazuki
Takahashi Masahide
|
| Source Title |
Journal of Materials Chemistry A
|
| Volume | 1 |
| Start Page | 7702 |
| End Page | 7708 |
| Abstract |
Monolithic layered double hydroxides (LDHs) with interconnected channels have been expected to enhance sorption rate as well as increase accumulation of anions. Although powder molding can form easy-handled LDH compacts, interconnected channel formation therein has not been achieved. Herein, we demonstrate cm-scale monolithic LDH-based composites with interconnected hierarchical channels via a spontaneous sol−gel reaction. The synthesis was performed on Mg−Al hydrotalcite-type LDHs starting from metal chlorides aqueous/ethanolic solution with poly(ethylene oxide) incorporated. Addition of propylene oxide triggers sol−gel reaction to form monolithic xerogels with a formula of [Mg0.66Al0.33(OH)2Cl0.33·2.92H2O]·3.1Al(OH)3. LDH crystals together with aluminum hydroxide crystals homogeneously build up gel skeletons with well-defined hierarchical channels. The interconnected channels in μm range (macrochannel) are formed as a phase-separated structure, whereas the channels in nm range (nanochannel) are as interstices of primary particles. The channel architectures are preserved in the course of rehydration process, affording enhanced sorption affinity for anion species in the process. Both of macro and mesochannels as well as high charge density of the obtained LDHs (Mg/Al=2.0) contribute enhanced anion sorption in the monolithic xerogels. The materials obtained here opens up applications of high performance adsorbent and ion-storage free from diffusion limitation.
|
| Descriptions |
The present work is partially supported by Grant-in-Aid for Scientific Research (B) (No. 22360276), and Grant-in-Aid for Young Scientists (B) (No. 24750206) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), administrated by Japan Society for the Promotion of Science (JSPS). Y. T. is also partially supported financially by a research grant from The Murata Scientific Foundation.
|
| Language |
eng
|
| Resource Type | journal article |
| Publisher |
Royal Society of Chemistry
|
| Date of Issued | 2013-04-24 |
| Rights |
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
|
| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 2050-7496
[DOI] 10.1039/c3ta11110e
[DOI] https://doi.org/10.1039/C3TA11110E
|
