Junguang Gao, Hashem O. Alsaab, Masoud Habibi Zare, Saeed Shirazian
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引用次数: 0
Abstract
Pharmaceutical contaminants in water pose a significant ecological risk and require advanced treatment solutions. In this study, the strategy of oxygen-deficient TiO2-x and doping is evaluated for its photocatalytic efficiency under visible light for pharmaceutical pollutant degradation, seawater purification and green fuel production. The oxygen vacancies reduced the band gap and improved visible light absorption and charge separation, allowing TiO2-x to achieve almost complete degradation of aspirin within 6 h. Mechanistic studies (EPR, LC-MS) revealed •O₂⁻ and h⁺ as the dominant reactive species. The TiO2-x (1:1) catalyst showed excellent stability and reusability. Modified catalysts (TiO2-Cu, TiO2-GO) were also evaluated, with TiO2-Cu and TiO2-x (1:1) showing superior removal of organic pollutants (>90%), natural organic matter (NOM) and divalent ions (Mg2+, Ca2+) in seawater. While efficient degradation reduced biotoxicity (95% EC50 reduction in the Microtox assay), incomplete mineralization in some systems resulted in toxic intermediates, highlighting the need for combined chemical and toxicity assessments. In addition, TiO2-x (1:1) and TiO2-GO showed increased activity in CO2 reduction. This work highlights oxygen vacancy engineering as a promising strategy for visible-light-driven environmental photocatalysis.
npj Clean WaterEnvironmental Science-Water Science and Technology
CiteScore
15.30
自引率
2.60%
发文量
61
审稿时长
5 weeks
期刊介绍:
npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.