Year: 2020
Type: article
Abstract: A colloidal‐amphiphile‐templated growth is developed to synthesize mesoporous complex oxides with highly crystalline frameworks. Organosilane‐containing colloidal templates can convert into thermally stable silica that prevents the overgrowth of crystalline grains and the collapse of the mesoporosity. Using ilmenite CoTiO3 as an example, the high crystallinity and the extraordinary thermal stability of its mesoporosity are demonstrated at 800 °C for 48 h under air. This synthetic approach is general and applicable to a series of complex oxides that are not reported with mesoporosity and high crystallinity, such as NiTiO3, FeTiO3, ZnTiO3, Co2TiO4, Zn2TiO4, MgTi2O5, and FeTi2O5. Those novel materials make it possible to build up correlations between mesoscale porosity and surface‐sensitive physicochemical properties, e.g., electromagnetic response. For mesoporous CoTiO3, there is a 3 K increase of its antiferromagnetic ordering temperature, compared with that of nonporous one. This finding provides a general guideline to design mesoporous complex oxides that allow exploring their unique properties different from bulk materials.
Source: Advanced Functional Materials
Institutions: University of Connecticut, Brown University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: STRUCTURAL & ELECTRONIC PROPERTIES OF IRON & COBALT MOLECULAR SIEVE CATALYSTS, Collaborative Research: Solar-Driven Hydrogenation of CO2 using Hierarchically Porous TiO2 with Spatially Isolated Au and Pt Nanoparticles, G222768804, PORPOUS NANO-SIZED TRANSITION METAL OXIDES: PREPARATION,CHARACTERIZATION, AND APPLICATION, EAGER: COLLABORATIVE RESEARCH: Hybrid Quantum Dot-Metal Nanocrystals for Photoreduction of CO2: Synthesis, Spectroscopy and Catalysis, EAGER: Collaborative Research: Hybrid Quantum Dot-Metal Nanocrystals for Photoreduction of CO2: Synthesis, Spectroscopy and Catalysis, G5648016710, G6004970476
OpenAlex ID: W3005966418