Co2+ anchored on surface-functionalized PET non-woven fabric and used as high efficiency monoatom-like catalyst for activating Oxone in water

Yinjie Liu; Xiying Zhou; Minglei Wang; Maojiang Zhang; Rongfang Shen; Yumei Zhang; Jiangtao Hu; Guozhong Wu

doi:10.1016/j.scitotenv.2019.134286

Co²⁺ anchored on surface-functionalized PET non-woven fabric and used as high efficiency monoatom-like catalyst for activating Oxone in water

Sci Total Environ. 2020 Jan 10:699:134286. doi: 10.1016/j.scitotenv.2019.134286. Epub 2019 Sep 5.

Authors

Yinjie Liu¹, Xiying Zhou¹, Minglei Wang², Maojiang Zhang³, Rongfang Shen⁴, Yumei Zhang⁵, Jiangtao Hu⁶, Guozhong Wu⁷

Affiliations

¹ School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
² CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China; University of Chinese Academy of Sciences, Beijing 100049, China.
³ CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China; School of Physical science and Technology, ShanghaiTech University, Shanghai 200031, China.
⁴ CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China.
⁵ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China.
⁶ CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China. Electronic address: hujiangtao@sinap.ac.cn.
⁷ CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China; School of Physical science and Technology, ShanghaiTech University, Shanghai 200031, China. Electronic address: wuguozhong@sinap.ac.cn.

PMID: 31677462
DOI: 10.1016/j.scitotenv.2019.134286

Abstract

Fenton-like processes have emerged as most promising techniques for generating reactive oxygen-containing radicals to deal with increasing levels of environmental pollution. Developing novel catalysts with simple manufacturing requirements, excellent activity levels, and stability remains a long-term goal in terms of practical application. So herein, a new polyethylene terephthalate (PET) non-woven fabric based composite catalyst has been fabricated, using radiation-induced graft polymerization of a functionalized group to chelate Co²⁺ ions as heterogeneous catalysts in peroxymonosulfate (Oxone) activation. Several impact factors, including catalyst dosage, Oxone concentration, reaction temperature, pH value, Co²⁺ precipitation ratio (of Co@PET at different pH values), and highly concentrated NaCl have been investigated here. Notably, Co@PET has shown the lowest activation energy of any reported catalyst, for degrading RhB by activating Oxone. Interestingly, as experimental RhB and Oxone solutions were passed through single Co@PET sheets, the RhB was decomposed into a colorless solution in the penetration process. Based on radical trapping and quenching experiments, a channel was determined to dominate RhB degradation, and furthermore, Co@PET could be re-used for RhB degradation by activating Oxone. These results showed that Co@PET effectively provided improved Fenton-like catalytic performance and stability, and was suitable for practical applications.

Keywords: Co(2+); Oxone; Radiation-induced graft polymerization; RhB; Single atomic catalysis.