Efficient degradation of orange II by ZnMn<sub>2</sub>O<sub>4</sub> in a novel photo-chemical catalysis system

A ZnMn2O4 catalyst has been synthesized via a sucrose-aided combustion method and characterized by various analytical techniques. It is composed of numerous nanoparticles (15–110 nm) assembled into a porous structure with a specific surface area (SSA) of 19.1 m2·g−1. Its catalytic activity has been investigated for the degradation of orange II dye using three different systems, i.e., the photocatalysis system with visible light, the chemocatalysis system with bisulfite, and the photochemical catalysis system with both visible light and bisulfite. The last system exhibits the maximum degradation efficiency of 90%, much higher than the photocatalysis system (15%) and the chemocatalysis system (67%). The recycling experiments indicate that the ZnMn2O4 catalyst has high stability and reusability and is thus a green and eximious catalyst. Furthermore, the potential degradation mechanisms applicable to the three systems are discussed with relevant theoretical analysis and scavenging experiments for radicals. The active species such as Mn(III), O2•−, h+, eaq−, SO4•− and HO• are proposed to be responsible for the excellent degradation results in the photo-chemical catalysis system with the ZnMn2O4 catalyst.[Figure not available: see fulltext.].

Files

Metadata

Work Title Efficient degradation of orange II by ZnMn<sub>2</sub>O<sub>4</sub> in a novel photo-chemical catalysis system
Access
Open Access
Creators
  1. Qingzhuo Ni
  2. Hao Cheng
  3. Jianfeng Ma
  4. Yong Kong
  5. Sridhar Komarneni
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Frontiers of Chemical Science and Engineering
Publication Date December 1, 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1007/s11705-019-1907-z
Deposited November 18, 2021

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Added Zn-Mn_FCSE_Revised_2019.10.15.docx
  • Added Creator Qingzhuo Ni
  • Added Creator Hao Cheng
  • Added Creator Jianfeng Ma
  • Added Creator Yong Kong
  • Added Creator Sridhar Komarneni
  • Published
  • Updated
  • Updated
  • Updated