Efficient piezocatalytic H2O2 production of atomic-level thickness Bi4Ti3O12 nanosheets with surface oxygen vacancy

Wang, Chunyang; Chen, Fang; Hu, Cheng; Ma, Tianyi; Zhang, Yihe

doi:10.1016/j.cej.2021.133930

Cited by 52 publications

(34 citation statements)

References 61 publications

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“…The band gap energies are found to be 2.84 eV (BTO−S), 2.96 eV (BTO−P), and 2.73 eV (BTO−R), respectively. All estimated band gap energies are lower than reported values of 3.08-3.22 eV (Yao et al, 2004;Zhang et al, 2009;Liu et al, 2020;Wang et al, 2022).…”

Section: Optical Characterizationcontrasting

confidence: 56%

“…Bismuth titanates-based photocatalysts such as Bi 4 Ti 3 O 12 (Liu et al, 2020;Wang et al, 2022), Bi 20 TiO 32 (Hou et al, 2013) and Bi 12 TiO 20 (Zhu et al, 2011) have been attracting wide attention due to their appealing electronic band structure, high stability and "earth-abundant" nature. Bi 4 Ti 3 O 12 (BTO) is one of the most important layered Bi, Ti-based photocatalysts investigated for various environmental applications.…”

Section: Introductionmentioning

confidence: 99%

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Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

2022

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The presence of pollutants, e.g., pharmaceutical residues and industrial pollutants causes serious risks and irreversible damage to public health and ecological balance. Semiconductor-based photocatalysis is an attractive way to treat polluted water. Rational design and nanostructuring of semiconductors with visible light absorption and prominent surfaces could strengthen surface-interface reactions, resulting in improved photocatalytic degradation. Herein, layered structured perovskites Bi4Ti3O12 (BTO) were synthesized by an ionic liquid [1-butyl-3-methylimidazolium iodide (Bmim)I] assisted approach. The precise tuning of synthetic conditions allowed formations of various microstructures, including spherical nanoparticles, nanoplates and nanorods, respectively. The optical analyses demonstrated that samples were typically visible light absorbents with narrow band gap energies (2.96–2.73 eV), and displayed pronounced degradation for pharmaceutical residues under visible light illumination. The factors responsible for the high efficiency of BTO photocatalysts were discussed in terms of unique structure, optical alignment, dipole induced carrier separation and formation of active radicals. Among studied samples, the nanorod shaped BTO showed 1.31 and 1.46 times higher apparent rate constants for tetracycline and ibuprofen degradation than its counterparts (spherical nanoparticles and nanoplates), respectively. The better performance of nanorods was ascribed to their higher visible light harvesting ability. Importantly, BTO nanorods exhibited nonselective degradation activity for diverse pollutants of pharmaceutical residues and industrial contaminants. This work demonstrates the unique strategy of microstructure regulation and a wide range of applications of layered perovskites for environmental remediation.

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Section: Optical Characterizationcontrasting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

2022

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“…7B. The conduction band (CB) of BTO is considered to be −1.59 eV ( vs. SHE) according to E g = E v − E c , 52 favoring the production of H 2 . In order to unravel the separation and transportation behaviors of charges driven by the piezoelectric field and the built-in electric field, the transient current response and electrochemical impedance spectroscopy (EIS) Nyquist plots were acquired.…”

Section: Resultsmentioning

confidence: 99%

Section: Mechanism Discussionmentioning

confidence: 99%

Cocatalyst engineering to weaken the charge screening effect over Au–Bi₄Ti₃O₁₂ for piezocatalytic pure water splitting

Lei

Chen³

et al. 2022

Catal. Sci. Technol.

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“…[34] Furthermore, the improved surface OV content would remarkably affect the material physicochemical properties such as the free electron density and electronic configuration, which might be other beneficial factors for catalysis. [35] Adv. Funct.…”

Section: Structural Characterizationmentioning

confidence: 99%

Self‐Assembled LaFeO₃/ZnFe₂O₄/La₂O₃ Ultracompact Hybrids with Enhanced Piezo‐Phototronic Effect for Oxygen Activation in Ambient Conditions

Zhang

Wang

Jia

et al. 2022

Adv Funct Materials

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Piezoelectric polarization portrays a promising technology to regulate the photogenerated charge carrier separation and transfer behaviors, and the design of multifunctional catalysts with piezo-phototronic effect is a key step. One strategy is to prepare a composite catalyst combining the ideal properties from each individual component. Herein, a facial dopantinduced self-assembling strategy is reported to fabricate an ultracompact nanocomposite (LaFeO 3 /ZnFe 2 O 4 /La 2 O 3 ) with enhanced efficiency for piezo-photocatalysis. The composite is synthesized at 800 °C from the one-pot method, thus the self-constructed interface is created during multi-phase formation, providing the intimate grain-to-grain contact between the semiconductive LaFeO 3 and piezoelectric ZnFe 2 O 4 /La 2 O 3 phases. In such a composite, a synergistic effect for oxygen activation is realized via the effective manipulation of the photogenerated charge carrier separation and spatial transportation through the vibration-created piezopotential. A high piezoelectric coefficient (d 33 ) up to 826 pm V −1 and a superior H 2 O 2 yield of 403 µmol g −1 h −1 (in open air and pure water) are achieved on the optimized composite, outperforming most of the reported lead-free piezo-photocatalyst. The ultracompact composite is very robust without any decay in H 2 O 2 -delivering capability after many cyclic tests.This study provides a universal strategy for the rational design of highperformance piezo-photocatalysts.

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Efficient piezocatalytic H2O2 production of atomic-level thickness Bi4Ti3O12 nanosheets with surface oxygen vacancy

Cited by 52 publications

References 61 publications

Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

Cocatalyst engineering to weaken the charge screening effect over Au–Bi₄Ti₃O₁₂ for piezocatalytic pure water splitting

Self‐Assembled LaFeO₃/ZnFe₂O₄/La₂O₃ Ultracompact Hybrids with Enhanced Piezo‐Phototronic Effect for Oxygen Activation in Ambient Conditions

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Efficient piezocatalytic H2O2 production of atomic-level thickness Bi4Ti3O12 nanosheets with surface oxygen vacancy

Cited by 52 publications

References 61 publications

Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

Ionic liquid-mediated microstructure regulations of layered perovskite for enhanced visible light photocatalytic activity

Cocatalyst engineering to weaken the charge screening effect over Au–Bi4Ti3O12 for piezocatalytic pure water splitting

Self‐Assembled LaFeO3/ZnFe2O4/La2O3 Ultracompact Hybrids with Enhanced Piezo‐Phototronic Effect for Oxygen Activation in Ambient Conditions

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Product

Resources

About

Cocatalyst engineering to weaken the charge screening effect over Au–Bi₄Ti₃O₁₂ for piezocatalytic pure water splitting

Self‐Assembled LaFeO₃/ZnFe₂O₄/La₂O₃ Ultracompact Hybrids with Enhanced Piezo‐Phototronic Effect for Oxygen Activation in Ambient Conditions