Intrinsic acid resistance and high removal performance from the incorporation of nickel nanoparticles into nitrogen doped tubular carbons for environmental remediation

Guoyu Zhong; Jiangnan Huang; Zhenjie Yao; Baojian Luo; Kaibin Li; Shurui Xu; Xiaobo Fu; Yonghai Cao

doi:10.1016/j.jcis.2020.01.055

Intrinsic acid resistance and high removal performance from the incorporation of nickel nanoparticles into nitrogen doped tubular carbons for environmental remediation

J Colloid Interface Sci. 2020 Apr 15:566:46-59. doi: 10.1016/j.jcis.2020.01.055. Epub 2020 Jan 17.

Authors

Guoyu Zhong¹, Jiangnan Huang², Zhenjie Yao¹, Baojian Luo¹, Kaibin Li¹, Shurui Xu¹, Xiaobo Fu³, Yonghai Cao⁴

Affiliations

¹ School of Chemical Engineering and Energy Technology, Guangdong Provincial Key Laboratory of Distributed Energy Systems, Dongguan University of Technology, Dongguan 523808 China.
² School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, Guangdong 510640, China.
³ School of Chemical Engineering and Energy Technology, Guangdong Provincial Key Laboratory of Distributed Energy Systems, Dongguan University of Technology, Dongguan 523808 China. Electronic address: fuxb@dgut.edu.cn.
⁴ School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, Guangdong 510640, China. Electronic address: meyhcao@scut.edu.cn.

PMID: 31986308
DOI: 10.1016/j.jcis.2020.01.055

Abstract

Nitrogen doped tubular magnetic carbons embedded with nickel nanoparticles (Ni@NTMCs) were prepared via a simple pyrolysis process and employed as the effective adsorbents for the Cr(VI) removal. Ni@NTMCs with as high as 10.63 at.% N doping exhibited the excellent Cr(VI) removal capacities of 24.4 and 250 mg g^-1 in neutral and acidic solution, respectively. Adsorption kinetics and isotherm study revealed that the monolayer chemical adsorption was the rate-controlling step for the Cr(VI) removal. The high removal performance can be ascribed to the combination of adsorption and reduction reaction between Cr(VI) ions, and Ni nanoparticles. N dopant and edge carbons acted as the Cr(VI) adsorption site. The surface Ni nanoparticles mainly made contributions to the reduction process. The embedded Ni nanoparticles steadily provided magnetism for the separation and helpful for the recycles stability, showing a high acid corrosion resistance in this study.

Keywords: Adsorption; Cr(VI) removal; Magnetic; Nitrogen doping; Reduction.