Issue 37, 2022

Water-induced stacking of α-Fe2O3 hexagonal nanoplates along the [001] direction and their facet-dependent catalytic performances

Abstract

Controlling the growth of nanocrystals to expose a specific facet is of great significance for the rational design of effective crystal catalysts. Herein, a water-induced stacking process was developed to obtain stacked α-Fe2O3 hexagonal nanoplates (HNP) along the [001] direction, and the ratio of the side exposed {012} + {104} facet over the exposed {001} facet was flexibly controlled by oriented attachment, which was determined by the added H2O dosage. The number of stacked HNP can increase from 6 to 18 when the H2O usage varied from 56 mmol to 444 mmol, and the ratio of {012} + {104}/{001} increased from 0.296 to 39.756. The control experiments suggest that the increase in hydrogen bonds and Ac anion desorption from the polar {001} facet were considered to be the possible reasons for the formation of stacked α-Fe2O3 HNP. Finally, their facet-dependent catalytic performances were determined in visible photocatalytic degradation of MB dye and CO oxidation, and an exactly opposite catalytic activity was suggested. This work provides a facile and feasible method for the controlled synthesis of α-Fe2O3 crystal facets.

Graphical abstract: Water-induced stacking of α-Fe2O3 hexagonal nanoplates along the [001] direction and their facet-dependent catalytic performances

Supplementary files

Article information

Article type
Paper
Submitted
08 Jūl. 2022
Accepted
15 Aug. 2022
First published
16 Aug. 2022

CrystEngComm, 2022,24, 6512-6518

Water-induced stacking of α-Fe2O3 hexagonal nanoplates along the [001] direction and their facet-dependent catalytic performances

X. Ren, H. Wang, L. Wang and B. Lv, CrystEngComm, 2022, 24, 6512 DOI: 10.1039/D2CE00945E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements