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

Bu-Ali Sina University
Sejong University
University of South Africa
Ataturk University

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

5 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

UN SDGs

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

SDG 3 Good Health and Well-being
SDG 6 Clean Water and Sanitation

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

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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",

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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

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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