Carbon-decorated iron oxide hollow granules formed using a silk fibrous template: Lithium-oxygen battery and wastewater treatment applications

Taek Seung Kim, Gwang Hee Lee, Seun Lee, Yoon Sung Choi, Jae Chan Kim, Hee Jo Song, Dong-Wan Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hierarchical nanoarchitecture and phase control of iron oxides are important approaches for achieving multi-functionality for various applications. Herein, rice-grain-shaped iron oxide hollow structures were synthesized via a hydrothermal process using a silk fibrous template, and the crystalline phases (α-Fe 2 O 3, Fe 3 O 4) were controlled by annealing. These structures were applied in a lithium-oxygen battery cathode and as adsorbents for wastewater treatment. The porosity, hollow interior, surface area, surface chemical composition and efficient carbon matrix of the C/Fe 3 O 4 hollow granules obtained by annealing under Ar atmosphere were favorable for enhancing the oxygen reduction and evolution kinetics when applied as an electrocatalyst for lithium-oxygen batteries, and also led to superior adsorption of organic pollutants (Rhodamine B) from an aqueous medium. The C/Fe 3 O 4 hollow granules were uniformly distributed and confined in the 3D nanoarchitecture; this morphology can offer rapid ion transport with improved electronic and chemical kinetics as well as superior adsorption of organic pollutants.

Original languageEnglish
Article numbere450
JournalNPG Asia Materials
Volume9
Issue number11
DOIs
Publication statusPublished - 2017 Nov 17

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

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