Application of BaTiO3-based catalysts for piezocatalytic, photocatalytic and piezo-photocatalytic degradation of organic pollutants and bacterial disinfection in wastewater: A comprehensive review

Masekela, Daniel; Hintsho‐Mbita, Nomso C.; Sam, S. Rinu; Yusuf, Tunde L.; Mabuba, Nonhlangabezo

doi:10.1016/j.arabjc.2022.104473

Cited by 69 publications

(29 citation statements)

References 188 publications

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“…This distortion can lead to a change in polarization, which is related to the appearance of free electrical charges on the surface of the ceramic. This polarization change is responsible for the ferroelectricity of BaTiO 3 that is one of the most important properties of the material, particularly in catalysis [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the dielectric response of the BT is also an important property, as it is related to its ability to store electrical energy. Based on Figure 3 b, plotting the dielectric constant as a function of the temperature, BaTiO 3 exhibits phase transitions from an orthorhombic phase to a tetragonal phase at 22 °C and from a ferroelectric tetragonal phase to a paraelectric cubic phase at 132 °C, which suggests that the BaTiO 3 is a typically ferroelectric material with remanent polarization along the [001] axis at room temperature [ 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

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BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

et al. 2023

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Microbial fuel cells (MFCs) provide new opportunities for the sustainable production of energy, converting organic matter into electricity through microorganisms. Moreover, MFCs play an important role in remediation of environmental pollutants from wastewater with power generation. This work focuses on the evaluation of ferroelectric perovskite materials as a new class of non-precious photocatalysts for MFC cathode construction. Nanoparticles of BaTiO3 (BT) were prepared and tested in a microbial fuel cell (MFC) as photocathode catalytic components. The catalyst phases were synthesized, identified and characterized by XRD, SEM, UV–Vis absorption spectroscopy, P-E hysteresis and dielectric measurements. The maximum absorption of BT nanoparticles was recorded at 285 nm and the energy gap (Eg) was estimated to be 3.77 eV. Photocatalytic performance of cathodes coated with BaTiO3 was measured in a dark environment and then in the presence of a UV–visible (UV–Vis) light source, using a mixture of dairy industry and domestic wastewater as a feedstock for the MFCs. The performance of the BT cathodic component is strongly dependent on the presence of UV–Vis irradiation. The BT-based cathode functioning under UV–visible light improves the maximum power densities and the open circuit voltage (OCV) of the MFC system. The values increased from 64 mW m−2 to 498 mW m−2 and from 280 mV to 387 mV, respectively, showing that the presence of light effectively improved the photocatalytic activity of this ceramic. Furthermore, the MFCs operating under optimal conditions were able to reduce the chemical oxygen demand load in wastewater by 90% (initial COD = 2500 mg L−1).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

et al. 2023

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“…1 Currently, photocatalysts show great potential in dealing with environmental issues because of their ability to utilize solar light to degrade organic pollutants. 2,3 The most critical step during photocatalysis process is the separation of photoexcited carriers. Notably, an internal electric field could be induced by the piezoelectric effect in piezocatalyst, which can effectively inhibit recombination of carrier.…”

Section: Introductionmentioning

confidence: 99%

Z‐scheme ZnSnO₃/Bi₂WO₆ with synergistic polarized electric field for efficient removal of diclofenac

Sun

et al. 2023

Applied Organom Chemis

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The built-in electric field induced by piezoelectric effect for suppressing the electron-hole recombination has gained substantial attention recently. In this study, a novel Z-scheme ZnSnO 3 /Bi 2 WO 6 (ZSO/BWO) piezo-photocatalyst with synergistic polarized electric field was synthesized by a simple impregnation method. The optimized 1% ZSO/BWO shows high piezo-photodegradation efficiency (99.9%, 60 min) and mineralization (42%, 60 min) of diclofenac (DCF) under the synergistic action of ultrasound and light, far exceeding that under sole ultrasound or illumination. The remarkable enhanced piezophotocatalytic activity of ZSO/BWO composite was attributed to the increased absorption, improved charge transfer, Z-scheme heterojunction, and tight surface contact between ZSO and BWO. Moreover, the Z-scheme mechanism of ZSO/BWO composites is studied in depth and confirmed by the free radical capture experiment and electron spin resonance technology. In addition, the corresponding intermediates of DCF degradation and the possible degradation pathways that were proposed on ZSO/BWO composites were analyzed by liquid chromatography-mass spectrometry and DFT. This work offers an efficient approach for constructing and preparing the highly efficient piezophotocatalysts for converting solar and mechanical vibration energies.

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“…On the other hand, BaTiO 3 has been applied as a catalyst for photocatalytic or piezocatalytic degradation of organic and inorganic pollutants in water with some modi cations to tune their properties for that purpose. Diverse strategies have been explored to improve catalyst properties of barium titanate including tailoring morphology and particle size, doping, formation of heterojunction, composites and deposition of noble metals [14,15]. Noble metals have been used to improve the properties of BaTiO 3 including gold (Au), silver (Ag), platinum (Pt) and palladium (Pd) through doping that increasing the piezo-photocatalyst sensitivity either under visible light or ultrasonic vibration [16,17].…”

Section: Introductionmentioning

confidence: 99%

Study of catalytic properties of pristine and Au-modified BaTiO3(001) through DFT calculations for CO hydrogenation

Comparán-Padilla¹,

Cruz

Garcia-Diaz

et al. 2023

Preprint

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Context. BaTiO3 is one of the most important ferroelectric oxides in the electronic applications. Also, it has attractive properties for catalysis that could be used for reducing the contamination levels especially carbon monoxide, CO. CO is one of the main gaseous pollutants generally released from the combustion of fossil fuel. In this work, the catalytic properties of pristine and Au-modified BaTiO3 perovskite for CO hydrogenation are studied. The CO adsorption and hydrogenation on pristine BaTiO3 leads to formaldehyde synthesis as the most stable product through two possible routes. Further hydrogenation stages are less probable. On Au-modified BaTiO3 formaldehyde is the principal product too but Au adatom induces selectivity making just one reaction route as the most stable. After BaTiO3 modification with Au unpaired electrons were generated. These unpaired electrons increased the adatom reactivity. According to the obtained results, pristine and Au-modified BaTiO3 can adsorb and hydrogenate CO generating formaldehyde as the principal product. BaTiO3 modifications with Au increases the reactivity and selectivity of the perovskite in the CO hydrogenation reactions. Methods. The study was performed through ab initio calculations using the periodic Density Functional Theory (DFT) as implemented in Quantum ESPRESSO. DFT calculations were carried out using the Plane Wave self-consistent field (PWscf). Spin density was considered for systems with unpaired electrons. Plane wave basis set was used to represent the electron states. Vanderbilt pseudopotentials with nonlinear core correction were used to model the interaction of ionic cores and valence electrons. Exchange-correlation energies were treated within the generalized gradient approximation (GGA) with the Perdew-Burke-Ernzerhof (PBE) parameterization.

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Application of BaTiO3-based catalysts for piezocatalytic, photocatalytic and piezo-photocatalytic degradation of organic pollutants and bacterial disinfection in wastewater: A comprehensive review

Cited by 69 publications

References 188 publications

BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

Z‐scheme ZnSnO₃/Bi₂WO₆ with synergistic polarized electric field for efficient removal of diclofenac

Study of catalytic properties of pristine and Au-modified BaTiO3(001) through DFT calculations for CO hydrogenation

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Application of BaTiO3-based catalysts for piezocatalytic, photocatalytic and piezo-photocatalytic degradation of organic pollutants and bacterial disinfection in wastewater: A comprehensive review

Cited by 69 publications

References 188 publications

BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

BaTiO3 Functional Perovskite as Photocathode in Microbial Fuel Cells for Energy Production and Wastewater Treatment

Z‐scheme ZnSnO3/Bi2WO6 with synergistic polarized electric field for efficient removal of diclofenac

Study of catalytic properties of pristine and Au-modified BaTiO3(001) through DFT calculations for CO hydrogenation

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Z‐scheme ZnSnO₃/Bi₂WO₆ with synergistic polarized electric field for efficient removal of diclofenac