Heavy Metal Removal from Wastewater by a Polypyrrole-derived N-doped Carbon Nanotube Decorated with Fish Scale-like Molybdenum Disulfide Nanosheets

Haitao Zhang,1#

Xin Ding,1#

Shitao Wang,1,*Email

Yan Huang,1

Xiao-Fei Zeng,1,*Email

Srihari Maganti,2

Qinglong Jiang,4

Mina Huang,2,3

Zhanhu Guo3 

Dapeng Cao1,*Email

1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

2Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech LLC, Knoxville, TN 37934, USA

3Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA

4Department of Chemistry and Physics, University of Arkansas, Pine Bluff, Arkansas 71601, USA

# Equally contributed to this work.

Abstract

Lead, duo to its toxicity, non-biodegradability and carcinogenicity, has huge harm to the environment and living beings. Therefore, developing an environmentally friendly material to remove lead from wastewater is of extraordinary significance for the health of human and other creatures. Here, we synthesized a novel N-doped carbon nanotube (derived from polypyrrole precursor) decorated with fish scale-like molybdenum disulfide nanosheet ([email protected]2) by high temperature hydrothermal reaction and further explored the practical application for removal of Pb(II) from wastewater. Owing to the fish scale-like structure, the [email protected]2 showed a maximum Pb(II) removal capacity of 381.87 mg/g, which is 50 times higher than that of the C-PPy nanotube without MoS2 decoration. By one-time filtration removal experiment, it is found that the Pb(II) in the solution after filtration can be almost removed completely, which suggests that the [email protected]2 is an extremely promising adsorbate for the efficient removal of Pb(II) from wastewater.

Heavy Metal Removal from Wastewater by a Polypyrrole-derived N-doped Carbon Nanotube Decorated with Fish Scale-like Molybdenum Disulfide Nanosheets