Mesostructuring layered materials: self-supported mesoporous layered double hydroxide nanotubes

Author(s)

Morais, Alysson F. ^[1] ; Nanclares, Dimy ^[1] ; Silva, Ivan G. N. ^[1] ; Duarte, Alfredo ^[2] ; Garcia, Fernando A. ^[1] ; Breynaert, Eric ^[3] ; Mustafa, Danilo ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil

^[3] Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, B-3001 Leuven - Belgium

• Document type: Journal article
• Source: NANOSCALE; v. 13, n. 27, p. 11781-11792, JUL 21 2021.
• Web of Science Citations: 2

Abstract

Synthesis of layered materials exhibiting hierarchical porosity remains challenging, but nevertheless worthwhile because it turns such solids into functional materials with high specific surface area. Using a soft-templating strategy in combination with the incorporation of 8-fold coordinated Eu3+, self-assembly of self-supported layered double hydroxide (LDH) nanotubes has been achieved. Heteromorphic equimolar substitution of Al3+ by Eu3+ in Zn2+/Al3+ LDH solids intercalated with 1,3,5-benzenetricarboxylate anions (BTC) assists precipitation of the double hydroxide layers onto the convex surface of Pluronic (R) P-123 worm-like micelles, yielding multilayer cylinders of BTC-intercalated LDHs. Removal of the micellar template is easily achieved by liquid extraction with methanol, yielding a network of interconnected, well-defined, self-supported, multi-walled, hollow cylindrical nanotubes. Removal of Eu3+ from the synthesis disables formation of the nanotubular morphology, but still yields LDHs containing a network of embedded mesopores, resulting in a specific surface area that is 5-fold higher as compared to standard LDHs. (AU)

• FAPESP's process: 15/19210-0 - Nanostructured double layered hydroxides with up e down-conversion properties for applications as sensitizers in solar cells
• Grantee: Danilo Mustafa
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 18/13837-0 - Rare earth spectroscopy as a tool for monitoring controlled release of food additives
• Grantee: Alysson Ferreira Morais
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/25665-1 - Charge and spin instabilities in unconventional superconductors
• Grantee: Fernando Assis Garcia
• Support Opportunities: Regular Research Grants