J. Mater. Sci. Technol. ›› 2022, Vol. 113: 105-116.DOI: 10.1016/j.jmst.2021.10.024

• Research article • Previous Articles     Next Articles

Co78Si8B14 metallic glass: A highly efficient and ultra-sustainable Fenton-like catalyst in degrading wastewater under universal pH conditions

Xindong Qina, Jiliang Xua,b, Zhengwang Zhub, Zhengkun Lib,*(), Dawei Fanga,*(), Huameng Fub, Shiming Zhangc, Haifeng Zhangb   

  1. aInstitute of Rare and Scattered Elements, College of Chemistry, Liaoning University, Shenyang 110036, China
    bShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    cQingdao Yunlu Advanced Materials Technology Co., Ltd., Qingdao 266232, China
  • Received:2021-07-15 Revised:2021-10-03 Accepted:2021-10-10 Published:2021-12-30 Online:2022-06-24
  • Contact: Zhengkun Li,Dawei Fang
  • About author:davidfine@163.com (D. Fang).
    *E-mail addresses: zkli@imr.ac.cn (Z. Li),

Abstract:

Overcoming the pH limitation and increasing the catalyst reusability remain pressing demands for metallic glass (MG) in wastewater remediation. Herein, Co78Si8B14 MG ribbons are used to degrade dye wastewater by activating hydrogen peroxide (H2O2) as Fenton-like catalysts. The Co-based MG catalysts exhibit high degradation efficiency under both acidic and alkaline conditions, and the kinetic reaction rate at pH 10 (0.176 min-1) and pH 4 (0.089 min-1) is 5.9 and 1.2 times higher than that of the extensively studied Fe-based MG catalysts, respectively. Impressively, the Co-based MG catalysts can be reused up to 20-60 times at universal pH conditions, demonstrating fairly good reusability. The newly discovered Co-based MG catalysts do not follow the classical Fenton reactions with H2O2 the way Fe-based MGs do. In an acid environment, hydroxyl radicals play a dominant role in the degradation, while in an alkaline environment, the effect of hydroxyl radicals is weakened, and Co3+ ions exert a relatively major function on the degradation. The excellent performance in catalytic activity and reusability at universal pH conditions of the Co-based MGs will inspire the development of MGs in wastewater treatment.

Key words: Metallic glass, Wastewater degradation, Catalytic applications