Application of a piezo-photocatalytic thin film (FTO/BaTiO3/SnO2) for enhanced degradation of organic pollutants and disinfection of wastewater

Masekela, Daniel; Hintsho‐Mbita, Nomso C.; Mabuba, Nonhlangabezo

doi:10.1016/j.ceramint.2022.10.251

Cited by 15 publications

(7 citation statements)

References 70 publications

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“…Nevertheless, we consider the results reported here as a proof-of-concept that the in situ approach is a viable route for achieving heterojunction effects on thin-film photocatalysts for application in pollutant degradation. This is proven by data in Table 2 where a comparison is reported between the best results we obtained with the (FeOx/g-C3N4)in +H2O2 (5 × 10 −4 M) samples and literature data (90)(91)(92)(93)(94)(95)(96)(97) for the removal of ciprofloxacin in water and additional information can also be found from literature [88][89][90][91].…”

Section: Photocatalytic Activitysupporting

confidence: 66%

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Fendrich,

Bajpai,

Edla

et al. 2023

Applied Sciences

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Thermally synthesized graphitic carbon nitride (g-C3N4) over pulsed laser deposition (PLD) produced urchin-like iron oxide (FeOx) thin films were fabricated via in situ and ex situ processes. Materials characterisation revealed the formation of the graphitic allotrope of C3N4 and a bandgap Eg for the combined FeOx/g-C3N4 of 1.87 and 1.95 eV for each of the different fabrication strategies. The in situ method permitted to develop a novel petal-like morphology, whereas for the ex situ method, a morphological mixture between FeOx bulk and g-C3N4 was observed. Given the improved optical and morphological properties of the in situ film, it was employed as a proof of concept for the direct photocatalysis and photo-Fenton removal of ciprofloxacin antibiotic (CIP) under visible light irradiation. Improved photocatalytic activity (rate constant k = 8.28 × 10−4 min−1) was observed, with further enhancement under photo-Fenton conditions (k = 2.6 × 10−3 min−1), in comparison with FeOx + H2O2 (k = 1.6 × 10−3 min−1) and H2O2 only (k = 1.3 × 10−4 min−1). These effects demonstrate the in situ methodology as a viable route to obtain working heterojunctions for solar photocatalysis in thin-film materials, rather than the more common powder materials.

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Section: Photocatalytic Activitysupporting

confidence: 66%

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Fendrich,

Bajpai,

Edla

et al. 2023

Applied Sciences

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“…Piezoelectric materials are classified as smart materials that generate electrical charges when subjected to mechanical vibrations. These smart materials also display an inverse piezoelectric effect, meaning that they can produce mechanical vibrations when exposed to an electric field (Masekela et al 2023a , b ). The intrinsic electric field present in materials can influence the chemical reactions occurring on their surfaces (Liang et al 2019 ).…”

Section: Piezocatalytic Mechanismsmentioning

confidence: 99%

“…This study underscores the immense potential of the BTO@TD-COF core–shell composite in efficiently neutralizing a spectrum of pollutants, underscoring its significance in advancing sustainable environmental solutions. Masekela and colleagues (Masekela et al 2023a , b ) achieved a significant breakthrough by producing a thin film composed of fluorine-doped tin oxide/barium titanate (FTO/BTO) loaded with SnO 2 . In addition to its innovative fabrication, this film was subjected to rigorous testing in the degradation of various organic pollutants, namely, MO, MB, and CIP.…”

Section: The Piezo-photocatalytic Xtio 3 -Based Ma...mentioning

confidence: 99%

“…Despite antibiotics cured humans and animals from deadly bacterial infections, their presence in the sewage may lead to the proliferation of antibiotic-resistant bacteria that poses a serious threat to the people and animals’ health and the efficiency of this medication (Wei et al 2020 ). They also can cause severe health consequences, such as vomiting, nausea, acute renal failure, and diarrhea (Masekela et al 2023a , b ).…”

Section: Introductionmentioning

confidence: 99%

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A comprehensive review on the application of semiconducting materials in the degradation of effluents and water splitting

Mahmoud,

Alsehli,

Alotaibi

et al. 2023

Environ Sci Pollut Res

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In this comprehensive review article, we delve into the critical intersection of environmental science and materials science. The introduction sets the stage by emphasizing the global water shortage crisis and the dire consequences of untreated effluents on ecosystems and human health. As we progress into the second section, we embark on an intricate exploration of piezoelectric and photocatalytic principles, illuminating their significance in wastewater treatment and sustainable energy production. The heart of our review is dedicated to a detailed analysis of the detrimental impacts of effluents on human health, underscoring the urgency of effective treatment methods. We dissected three key materials in the realm of piezo-photocatalysis: ZnO-based materials, BaTiO3-based materials, and bismuth-doped materials. Each material is scrutinized for its unique properties and applications in the removal of pollutants from wastewater, offering a comprehensive understanding of their potential to address this critical issue. Furthermore, our exploration extends to the realm of hydrogen production, where we discuss various types of hydrogen and the role of piezo-photocatalysis in generating clean and sustainable hydrogen. By illuminating the synergistic potential of these advanced materials and technologies, we pave the way for innovative solutions to the pressing challenges of water pollution and renewable energy production. This review article not only serves as a valuable resource for researchers and scholars in the fields of material science and environmental engineering but also underscores the pivotal role of interdisciplinary approaches in addressing complex global issues.

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“…The key to the photocatalytic degradation of antibiotics is the selection of photocatalyst, and the semiconductor photocatalyst that can respond to visible light should be selected in order to effectively utilize sunlight. Barium titanate (BaTiO 3 ) and cerium dioxide (CeO 2 ) are two common photocatalysts, but they can only respond to ultraviolet light because of their large optical band gap (Gu et al, 2022;Xiao et al, 2022;Masekela et al, 2023;Passi and Pal, 2023). Therefore, researchers are focusing on enhancing their light response, especially to simulated sunlight, through ion doping, surface modification, and heterostructural construction (Cheng et al, 2022;Gao et al, 2022;Prajapati et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Construction of BaTiO3/CeO2 heterojunction and comparative study on photocatalytic activity of degradation of different drugs

2023

Front. Mater.

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A type II band aligned BaTiO3/CeO2 photocatalysts was constructed by a simple one-step solution synthesis method. The BaTiO3/CeO2 photocatalysts contain only cubic phase BaTiO3 and CeO2, and the particles are approximately spherical with a small amount of adhesion and agglomeration, and the average particle size is about 50 nm. Transmission electron microscopy (TEM) observation and element Mapping characterization confirmed the formation of special heterojunction between BaTiO3 and CeO2 and the presence of a large number of oxygen vacancies, which resulted in high visible optical absorption coefficient. The BaTiO3/CeO2 photocatalysts demonstrated high photocatalytic activity for the degradation of oxytetracycin hydrochloride, and the optimal drug concentration, catalyst content and pH value are 50 mg/L, 1 g/L and 7, respectively. Simultaneously, the BaTiO3/CeO2 photocatalysts were selective for degradation of aureomycin hydrochloride, doxycycline hydrochloride and tetracycline hydrochloride. Other photocatalytic experiments show that the BaTiO3/CeO2 photocatalysts have high chemical and cyclic stability, and the synergistic effect of holes, hydroxyl radicals and superoxide radicals plays an important role in the whole photocatalytic process. This simple synthesis route provides a technical reference for constructing other wide-band gap semiconductors to respond to simulated sunlight.

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Application of a piezo-photocatalytic thin film (FTO/BaTiO3/SnO2) for enhanced degradation of organic pollutants and disinfection of wastewater

Cited by 15 publications

References 70 publications

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

A comprehensive review on the application of semiconducting materials in the degradation of effluents and water splitting

Construction of BaTiO3/CeO2 heterojunction and comparative study on photocatalytic activity of degradation of different drugs

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