Hierarchical Ordered Mesoporous Sr₂Bi₄Ti₅O₁₈ Microflowers with Rich Oxygen Vacancies In Situ Assembled by Nanosheets for Piezo-Photocatalysis

Inorganic Chemistry, Год журнала: 2024, Номер 63(46), С. 22101 - 22117

Опубликована: Ноя. 1, 2024

The Aurivillius phase layered perovskite ferroelectric material Sr2Bi4Ti5O18 (SBTO) exhibits spontaneous polarization and piezoelectric properties, which confer significant potential for piezo-photocatalysis. Its ability to enhance electron–hole separation while providing excellent fatigue resistance positions it as a promising candidate in this field. Defects were introduced improve the structural photoelectrochemical properties of SBTO. SBTO nanocrystals, featuring mixed structure hierarchically ordered mesoporous microflowers nanosheets, successfully synthesized via hydrothermal method. sample at lower temperature displayed optimal oxygen vacancy concentration exhibited superior piezoelectric-photo synergistic degradation activity organic pollutants. Additionally, corona increases macroscopic photocatalyst, promoting photogenerated carriers. Finite element simulations confirmed that single flower-like generates higher compared sheet-like morphology. In conclusion, integrating self-assembled hierarchical design, polarization, defect engineering forms an effective strategy achieving high-performance SBTO-based piezo-photocatalysts.

Язык: Английский

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Constructing ultra-small t-BiOCl/e-LDH nanosheets for the synchronous removal of RR2 and Cr(VI): Insights into photocatalysis mechanism differences between RR2 and RR2/Cr(VI) systems

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131521 - 131521

Опубликована: Янв. 1, 2025

Язык: Английский

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Construction of Mn-Defective S/Mn_0.4Cd_0.6S for Promoting Photocatalytic N₂ Reduction

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 11, 2025

Improving catalytic performance by controlling the microstructure of materials has become a hot topic in field photocatalysis, such as surface defect site, multistage layered morphology, and exposed crystal surface. Due to differences metal atomic radius (Mn Cd) solubility product constant (MnS CdS), Mn easily occurred S/Mn0.4Cd0.6S (S/0.4MCS) composite. To optimize photocatalytic N2 fixation, effects synthesis conditions reaction for S/0.4MCS were explored systematically studied. Combined with experimental characterization theoretical calculation, not only pathway but also key steps reduction explored. Moreover, transfer mechanism photogenerated charge carriers (PCCs) formed between S 0.4MCS was studied, which enhanced utilization rate electrons (e–) holes (h+). This work detailedly discusses relationship performance, is beneficial design efficient photocatalyst.

Язык: Английский

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Synergistic optimization of charge carrier separation and transfer in ZnO through crystal facet engineering and piezoelectric effect

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137599 - 137599

Опубликована: Апрель 1, 2025

Язык: Английский

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Hybrid piezo-photocatalysts: Harnessing dual functionalities for advanced charge dynamics and catalytic performance

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 157440 - 157440

Опубликована: Ноя. 1, 2024

Язык: Английский

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Visible Light Active 0.95KNbO₃‐0.05Ba(Nb_1/2Sc_1/2)O₃ Ferroelectric for Enhanced Photocatalytic Activity

Advanced Sustainable Systems, Год журнала: 2024, Номер unknown

Опубликована: Окт. 15, 2024

Abstract This study reports a visible light active Ba/Sc co‐doped potassium niobate (KNbO 3 ) ferroelectric material for enhanced photocatalytic applications. Through 5% Ba and Sc co‐doping in KNbO (i.e., 0.95KNbO ‐0.05Ba(Nb 1/2 )O ), the electronic band gap (E g is narrowed down to range of solar spectrum. The prepared samples are systematically examined by using X‐ray diffraction Raman spectroscopy, which confirms successful incorporation ions into lattice. Scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS) analysis reveal particle morphology chemical homogeneity samples. UV–vis PE‐loop demonstrate optical absorption compared host while retaining behavior. photoelectrochemical (PEC) measurements under irradiation notable enhancement photocurrent (hereafter denoted 5KBSNO) undoped . Additionally, 5KBSNO sample displays RhB dye degradation efficiency, reaching ≈50% parent (≈30%) irradiation. First‐principles density functional theory (DFT) calculations employed understand mechanism responsible reduced gap. presents promising developing advanced photocatalysts with tailored structures efficient harvesting conversion contamination remediation

Язык: Английский

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Synergistically triggering macroscopic polarization and dynamic reconfiguration of CdS@SnS2 heterojunction to enhance piezo-photocatalytic nitrate reduction

Composites Part B Engineering, Год журнала: 2024, Номер unknown, С. 112108 - 112108

Опубликована: Дек. 1, 2024

Язык: Английский

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