Selective laser melting manufactured porous Fe-based metallic glass matrix composite with remarkable catalytic activity and reusability. (June 2020)

• Record Type: Journal Article
• Authors: Liang, Shun-Xing; Wang, Xueqing; Zhang, Wenchang; Liu, Yu-Jing; Wang, Weimin; Zhang, Lai-Chang
• Is Part Of: Applied materials today. Volume 19(2020)
• Publication Date: 2020-06
• Subjects: Selective laser melting -- Metallic glass matrix composite -- Catalyst -- Porous microstructure -- Reusability; Materials science -- Periodicals; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1016/j.apmt.2019.100543
• Languages: English
• ISSNs: 2352-9407

Abstract

Graphical abstract: Highlights: Fe-based metallic glass matrix composite was produced by selective laser melting. 45 times reusability was achieved in sulfate radical-based reaction. Extremely low surface decay and precipitation promoted reusability of composite. Volume fraction of phases affected the catalytic efficiency in the composite. Excellent overall catalytic ability could be found in the composite. Abstract: The ever-increasing environmental consciousness has stimulated new design of catalysts to meet environmental requirements due to rapid expansion of industrialization. Additive manufacturing now emerges as a novel technology that revolutionizes the way of material manufacturing with functional applications. Herein, the manufacturing of an Fe-based metallic glass (MG) matrix composite with three-dimensional rhombic dodecahedron microstructure by selective laser melting (SLM) is reported. The SLM-produced porous Fe-based MG matrix composite has been employed into catalytic activation in Fenton-like process and sulfate radical-based reaction. Results demonstrate that up to 45 times reusability is achieved in sulfate radical-based reaction without any apparent efficiency decay, which is the highest reusability with high efficiency by catalysts as of now. The remarkable catalytic reusability originates from extremely low surface decay in sulfate radical-based reaction. In addition, structural analysis indicates the α-Fe nanocrystals could trigger easy electron transfer but a large amount of α-Fe lead to an inhibitive catalytic effect in the MG matrix composite. The overall catalytic ability also demonstrates the excellent catalytic performance of SLM-produced porous Fe-based MG matrix composite in the wastewater remediation. This work suggests a novel SLM-produced catalyst with promising industrial potential and value.