Iron-carbon composite material, preparation method thereof and use therefor

US11697595B2 · kind B2 · utility

Assignee

• Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences · CN

Inventors

• Fangbai Li · Tangxia, CN
• Liping Fang · Qingdao, CN
• Kai Liu · Beijing, CN

Key dates

• Filing date: Jun 2, 2021
• Grant date: Jul 11, 2023
• Expiry date: Sep 19, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2305/08
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An iron-carbon composite material and a preparation method thereof are disclosed. The iron-carbon composite material includes a three-layer core-shell structure, which successively includes a porous graphite carbon outer layer, an iron carbide intermediate layer and a nano zero-valent iron core from outside to inside. The present invention wraps nano zero-valent iron in porous graphite carbon and iron carbide, which can prevent the oxidation of nano zero-valent iron, while iron carbide effectively improves the ability to fix arsenic, realizing high efficiency and long-term use of nano zero-valent iron. Iron carbide may effectively adsorb and fix arsenic, and especially efficiently oxidize As(III) to relatively low-toxic As(V).