A1 Journal article (refereed), original research

Synthesis of a novel SnO2/graphene-like carbon/TiO2 electrodes for the degradation of recalcitrant emergent pharmaceutical pollutants in a photo-electrocatalytic system


Open Access publication

Publication Details
Authors: Kaur Parminder, Park Yuri, Sillanpää Mika, Imteaz Monzur A.
Publisher: Elsevier
Publication year: 2021
Language: English
Related journal or series: Journal of Cleaner Production
Journal acronym: JCP
Volume number: 313
Issue number: 127915
ISSN: 0959-6526
eISSN: 1879-1786
JUFO level of this publication: 2
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2021072641715

Abstract

Photo-electro catalysis (PEC) has emerged
as an efficient, sustainable, and green technology for the treatment of
recalcitrant compounds, where anode plays a critical role. Novel preparation
methods for anodes as catalysts should be considered in order to achieve larger
active sites and diverse oxidants production, which can directly enhance the
degradation performance. Therefore, in this work, a new cheap and green
electrode material modification or synthesis method was studied. A
graphene-like carbon mesoporous layer and SnO2 layer over TiO2
was produced and it resulted in higher porosity and stability of the electrode.
This led to dominating advantage on photo/electrocatalytic activity and
degradation performances. Synthesized electrodes attribute better charge
separation and it was analyzed by electrochemical characterization. Hydroxyl
radicals and superoxide (O2- ) radicals were dominant oxidants in the degradation process based on the catalytic and degradation mechanism.
However, the synergistic effect of photo and electro-catalytic degradation
performances shrank under unoptimized PEC operational parameters. Therefore,
the effect of various PEC parameters for the degradation of emerging pollutants
was optimized. It was found that 90% degradation of emergent pollutants was
achieved at optimized PEC operational parameters within 60 minutes of reaction
time. Intermediates via PEC degradation of emerging pollutants were identified
and a possible removal pathway was thus proposed. The three-dimensional SnO2-G-TiO2 electrodes
hold great potential for PEC treatment of wastewater treatment.


Last updated on 2021-03-08 at 10:54