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Three-Dimensionally Printed Transition Metal Catalysts with Hierarchically Porous Structures for Wastewater Purification

Sheng Guo^1,2,*, Mengmeng Yang¹, Yao Huang², Xizi Gao¹, Chao Cai^3,*, Kun Zhou^4,5,*

1 State Key Laboratory of New Textile Materials & Advanced Processing Technologies, Wuhan Textile University, Wuhan, 430200, China
2 School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
3 State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
4 Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, 637141, Singapore
5 School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

* Corresponding Authors: Sheng Guo; Chao Cai. Email: ;

The International Conference on Computational & Experimental Engineering and Sciences 2024, 30(4), 1-1. https://doi.org/10.32604/icces.2024.012655

Abstract

3D printing technology has demonstrated considerable potential in wastewater remediation. Zero-valent metal (ZVM) has been recognized as an efficient catalyst facilitating the organic pollutant degradation in water. However, owing to its inclination toward oxidation and aggregation, the practical utilization of ZVM remains a challenge. Herein, we have employed 3D printing techniques to fabricate hierarchically porous ZVM, such as zero-valent copper and zero-valent iron, which exhibit a high level of printing precision and commendable resistance to compression. These 3D-ZVM catalysts can effectively activate peroxymonosulfate (PMS), thereby degrading various organic pollutants, including tetracycline, ciprofloxacin, rhodamine B, and metronidazole. Additionally, the 3D-ZVM/PMS system exhibits a broad pH resistance range, exceptional adaptability, and superior reusability. The impact of several parameters, such as PMS concentration, solution pH and temperature, and coexisting inorganic anions, on the performance of the ZVM/PMS system is also explored. Notably, a toxicity estimation analysis suggests the toxicity of degradation products significantly reduced, which is further confirmed by growth control experiments on bean sprouts. This work offers valuable insights into the practical applications of the ZVM/PMS system, and also serves as a guide for the rational design of efficient and stable catalysts that can be readily recovered from aqueous environments.

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Keywords

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