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Highly dispersed Mn 2 O 3 −Co 3 O 4 nanostructures on carbon matrix as heterogeneous Fenton‐like catalyst
Author(s) -
Hazarika Kumar Kashyap,
Talukdar Hiya,
Sudarsanam Putla,
Bhargava Suresh K.,
Bharali Pankaj
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5512
Subject(s) - catalysis , bimetallic strip , chemistry , rhodamine b , degradation (telecommunications) , inorganic chemistry , carbon fibers , heterogeneous catalysis , transition metal , oxide , redox , nuclear chemistry , photocatalysis , organic chemistry , materials science , composite number , computer science , composite material , telecommunications
This work reports the synthesis of various carbon (Vulcan XC‐72 R) supported metal oxide nanostructures, such as Mn 2 O 3 , Co 3 O 4 and Mn 2 O 3 −Co 3 O 4 as heterogeneous Fenton‐like catalysts for the degradation of organic dye pollutants, namely Rhodamine B (RB) and Congo Red (CR) in wastewater. The activity results showed that the bimetallic Mn 2 O 3 −Co 3 O 4 /C catalyst exhibits much higher activity than the monometallic Mn 2 O 3 /C and Co 3 O 4 /C catalysts for the degradation of both RB and CR pollutants, due to the synergistic properties induced by the Mn−Co and/or Mn (Co)−support interactions. The degradation efficiency of RB and CR was considerably increased with an increase of reaction temperature from 25 to 45°C. Importantly, the bimetallic Mn 2 O 3 −Co 3 O 4 /C catalyst could maintain its catalytic activity up to five successive cycles, revealing its catalytic durability for wastewater purification. The structure–activity correlations demonstrated a probable mechanism for the degradation of organic dye pollutants in wastewater, involving •OH radical as well as Mn 2+ /Mn 3+ or Co 2+ /Co 3+ redox couple of the Mn 2 O 3 −Co 3 O 4 /C catalyst.