Jump to main content
Jump to site search


Preparation of crystal TiO2 foam with micron channels and mesopores by a freeze-casting method without additives and unidirectional freezing

Author affiliations

Abstract

TiO2 monoliths with hierarchical pores and three-dimensional (3-D) networks have attracted much interest due to their potential applications in photocatalysis, photovoltaic and electrical energy storage, etc. However, their present preparation procedures are complex and expensive. Herein, we report a novel, simple, scalable and low-cost strategy based on the self-assembly of a ligand attached to TiO2 nanoparticles (NPs) to prepare crystal TiO2 foam with micron channels and mesopores in its 3-D skeleton, which has been fabricated via centrifugation and subsequent freeze-drying of suspensions of TiO2 particles in benzene. Furthermore, FT-IR and SEM measurements demonstrated that the 3-D continuous skeleton and channels are formed in a synergistic way, which were facilitated by hydrogen bonding between ligands, and the size of these can be regulated by varying the centrifugal speed. The produced TiO2 foam acts as a good photocatalyst for the degradation of formaldehyde due to its good mass transport through the micron channels. This work provides a novel strategy for the synthesis of the hierarchical porous crystal TiO2 foam by ligand self-assembly and it would be widely used in preparing other crystal porous functional materials.

Graphical abstract: Preparation of crystal TiO2 foam with micron channels and mesopores by a freeze-casting method without additives and unidirectional freezing

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jul 2018, accepted on 15 Aug 2018 and first published on 15 Aug 2018


Article type: Paper
DOI: 10.1039/C8CE01120F
Citation: CrystEngComm, 2018, Advance Article
  •   Request permissions

    Preparation of crystal TiO2 foam with micron channels and mesopores by a freeze-casting method without additives and unidirectional freezing

    Y. Yang, Q. Xie, S. Mukherjee, Y. Zheng, X. Yan, J. Yan, J. Liu and Y. Fang, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE01120F

Search articles by author

Spotlight

Advertisements