TY - JOUR
T1 - Photoelectrocatalytic degradation of high-density polyethylene microplastics on TiO2-modified boron-doped diamond photoanode
AU - Quilumbaquin, Wendy
AU - Castillo-Cabrera, G. Xavier
AU - Borrero-González, Luis J.
AU - Mora, José R.
AU - Valle, Vladimir
AU - Debut, Alexis
AU - Loor-Urgilés, Luis D.
AU - Espinoza-Montero, Patricio J.
N1 - Publisher Copyright:
© 2024 The Author(s)
PY - 2024/3/15
Y1 - 2024/3/15
N2 - Microplastic (MP) accumulation in the environment is accelerating rapidly, which has led to their effects on both the ecosystem and human life garnering much attention. This study is the first to examine the degradation of high-density polyethylene (HDPE) MPs via photoelectrocatalysis (PEC) using a TiO2-modified boron-doped diamond (BDD/TiO2) photoanode. This study was divided into three stages: (i) preparation of the photoanode through electrophoretic deposition of synthetic TiO2 nanoparticles on a BDD electrode; (ii) characterization of the modified photoanode using electrochemical, structural, and optical techniques; and (iii) degradation of HDPE MPs by electrochemical oxidation and photoelectrocatalysis on bare and modified BDD electrodes under dark and UV light conditions. The results indicate that the PEC technique degraded 89.91 ± 0.08% of HDPE MPs in a 10-h reaction and was more efficient at a lower current density (6.89 mA cm−1) with the BDD/TiO2 photoanode compared to electrochemical oxidation on bare BDD.
AB - Microplastic (MP) accumulation in the environment is accelerating rapidly, which has led to their effects on both the ecosystem and human life garnering much attention. This study is the first to examine the degradation of high-density polyethylene (HDPE) MPs via photoelectrocatalysis (PEC) using a TiO2-modified boron-doped diamond (BDD/TiO2) photoanode. This study was divided into three stages: (i) preparation of the photoanode through electrophoretic deposition of synthetic TiO2 nanoparticles on a BDD electrode; (ii) characterization of the modified photoanode using electrochemical, structural, and optical techniques; and (iii) degradation of HDPE MPs by electrochemical oxidation and photoelectrocatalysis on bare and modified BDD electrodes under dark and UV light conditions. The results indicate that the PEC technique degraded 89.91 ± 0.08% of HDPE MPs in a 10-h reaction and was more efficient at a lower current density (6.89 mA cm−1) with the BDD/TiO2 photoanode compared to electrochemical oxidation on bare BDD.
KW - Devices
KW - Materials chemistry
UR - http://www.scopus.com/inward/record.url?scp=85185596604&partnerID=8YFLogxK
U2 - 10.1016/j.isci.2024.109192
DO - 10.1016/j.isci.2024.109192
M3 - Artículo
AN - SCOPUS:85185596604
SN - 2589-0042
VL - 27
JO - iScience
JF - iScience
IS - 3
M1 - 109192
ER -