Influence of CuWO₄-induced heterostructures on porous TiO₂ ceramic coatings for Cr⁶⁺ reduction

Hamed Bahramian; Arash Fattah-alhosseini; Minoo Karbasi; Mosab Kaseem; Mika Sillanpää; Burak Dikici

doi:10.1016/j.psep.2025.107814

Influence of CuWO₄-induced heterostructures on porous TiO₂ ceramic coatings for Cr⁶⁺ reduction

Hamed Bahramian
, Arash Fattah-alhosseini
, Minoo Karbasi
, Mosab Kaseem
, Mika Sillanpää
, Burak Dikici

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The discharge of wastewater containing carcinogenic and genotoxic Cr⁶⁺ poses severe risks to environmental and human health. This study presents TiO₂/CuWO₄ heterostructure photocatalysts synthesized via hydrothermal post-treatment of PEO coatings for Cr⁶⁺ photoreduction. Comprehensive analyses including morphological, structural, compositional, optical, and photoelectrochemical characterization confirmed the formation of a hierarchical coating with uniformly distributed CuWO₄ particles on microporous TiO₂. The enhanced Cr⁶⁺ photoreduction efficiency stems from CuWO₄’s narrower bandgap, its heterojunction formation with TiO₂, improved charge carrier separation, reduced charge-transfer resistance, and increased photocurrent, yielding a photocatalytic rate constant 3.77 times higher than that of pure TiO₂ coatings. These findings provide crucial insights into Cr⁶⁺ reduction mechanisms and introduce a new approach for photocatalytic coatings in environmental applications.

Original language	English
Article number	107814
Journal	Process Safety and Environmental Protection
Volume	202
DOIs	https://doi.org/10.1016/j.psep.2025.107814
Publication status	Published - Oct 2025
Externally published	Yes

Keywords

Cr⁶⁺ photoreduction
Hydrothermal post-treatment
Plasma electrolytic oxidation
TiO/CuWO heterojunction

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
General Chemical Engineering
Safety, Risk, Reliability and Quality

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.psep.2025.107814

Cite this

@article{17417311b7534577ae5ad4092b1a4972,

title = "Influence of CuWO₄-induced heterostructures on porous TiO₂ ceramic coatings for Cr⁶⁺ reduction",

abstract = "The discharge of wastewater containing carcinogenic and genotoxic Cr⁶⁺ poses severe risks to environmental and human health. This study presents TiO2/CuWO4 heterostructure photocatalysts synthesized via hydrothermal post-treatment of PEO coatings for Cr⁶⁺ photoreduction. Comprehensive analyses including morphological, structural, compositional, optical, and photoelectrochemical characterization confirmed the formation of a hierarchical coating with uniformly distributed CuWO4 particles on microporous TiO2. The enhanced Cr⁶⁺ photoreduction efficiency stems from CuWO4{\textquoteright}s narrower bandgap, its heterojunction formation with TiO2, improved charge carrier separation, reduced charge-transfer resistance, and increased photocurrent, yielding a photocatalytic rate constant 3.77 times higher than that of pure TiO2 coatings. These findings provide crucial insights into Cr⁶⁺ reduction mechanisms and introduce a new approach for photocatalytic coatings in environmental applications.",

keywords = "Cr⁶⁺ photoreduction, Hydrothermal post-treatment, Plasma electrolytic oxidation, TiO/CuWO heterojunction",

author = "Hamed Bahramian and Arash Fattah-alhosseini and Minoo Karbasi and Mosab Kaseem and Mika Sillanp{\"a}{\"a} and Burak Dikici",

note = "Publisher Copyright: {\textcopyright} 2025 The Institution of Chemical Engineers",

year = "2025",

month = oct,

doi = "10.1016/j.psep.2025.107814",

language = "English",

volume = "202",

journal = "Process Safety and Environmental Protection",

issn = "0957-5820",

publisher = "Institution of Chemical Engineers",

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TY - JOUR

T1 - Influence of CuWO₄-induced heterostructures on porous TiO₂ ceramic coatings for Cr⁶⁺ reduction

AU - Bahramian, Hamed

AU - Fattah-alhosseini, Arash

AU - Karbasi, Minoo

AU - Kaseem, Mosab

AU - Sillanpää, Mika

AU - Dikici, Burak

PY - 2025/10

Y1 - 2025/10

N2 - The discharge of wastewater containing carcinogenic and genotoxic Cr⁶⁺ poses severe risks to environmental and human health. This study presents TiO2/CuWO4 heterostructure photocatalysts synthesized via hydrothermal post-treatment of PEO coatings for Cr⁶⁺ photoreduction. Comprehensive analyses including morphological, structural, compositional, optical, and photoelectrochemical characterization confirmed the formation of a hierarchical coating with uniformly distributed CuWO4 particles on microporous TiO2. The enhanced Cr⁶⁺ photoreduction efficiency stems from CuWO4’s narrower bandgap, its heterojunction formation with TiO2, improved charge carrier separation, reduced charge-transfer resistance, and increased photocurrent, yielding a photocatalytic rate constant 3.77 times higher than that of pure TiO2 coatings. These findings provide crucial insights into Cr⁶⁺ reduction mechanisms and introduce a new approach for photocatalytic coatings in environmental applications.

AB - The discharge of wastewater containing carcinogenic and genotoxic Cr⁶⁺ poses severe risks to environmental and human health. This study presents TiO2/CuWO4 heterostructure photocatalysts synthesized via hydrothermal post-treatment of PEO coatings for Cr⁶⁺ photoreduction. Comprehensive analyses including morphological, structural, compositional, optical, and photoelectrochemical characterization confirmed the formation of a hierarchical coating with uniformly distributed CuWO4 particles on microporous TiO2. The enhanced Cr⁶⁺ photoreduction efficiency stems from CuWO4’s narrower bandgap, its heterojunction formation with TiO2, improved charge carrier separation, reduced charge-transfer resistance, and increased photocurrent, yielding a photocatalytic rate constant 3.77 times higher than that of pure TiO2 coatings. These findings provide crucial insights into Cr⁶⁺ reduction mechanisms and introduce a new approach for photocatalytic coatings in environmental applications.

KW - Cr⁶⁺ photoreduction

KW - Hydrothermal post-treatment

KW - Plasma electrolytic oxidation

KW - TiO/CuWO heterojunction

UR - https://www.scopus.com/pages/publications/105015046073

U2 - 10.1016/j.psep.2025.107814

DO - 10.1016/j.psep.2025.107814

M3 - Article

AN - SCOPUS:105015046073

SN - 0957-5820

VL - 202

JO - Process Safety and Environmental Protection

JF - Process Safety and Environmental Protection

M1 - 107814

ER -

Influence of CuWO₄-induced heterostructures on porous TiO₂ ceramic coatings for Cr⁶⁺ reduction

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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