strong synergistic effect of the (110) and (100) facets of the SrTiO<sub>3</sub> perovskite micro/nanocrystal: decreasing the binding energy of exciton and superb photooxidation capability for Co<sup>2+</sup>

Jia, Qibo; Wang, Chuyu; Liu, Jian; Cai, Xiaojiao; Li, Zhong; Yu, Gangqiang; Duan, Dongping

doi:10.1039/d2nr02977d

Cited by 4 publications

(1 citation statement)

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“…In our previous work, we focused on exploring the effect of SrTiO 3 crystal facets on the properties of photogeneration carriers. 9,10 Under the synergistic effects of exposed crystal facets and Sr-O bi-vacancy which exists on SrTiO 3 (110) crystal facets exclusively, self-trapping excitons with ultra-bottom binding energy and rapid formation-dissociation were generated. Compared to the common cubic SrTiO 3 , this unique SrTiO 3 polyhedra produced more free carriers with longer life and better Co 2+ photooxidation.…”

Section: Introductionmentioning

confidence: 99%

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

Wang¹,

Li²,

Cai³

et al. 2023

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

Wang¹,

Li²,

Cai³

et al. 2023

J. Mater. Chem. A

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Effect of Different Molten Salts on Structure and Water Splitting Performance of Al‐Doped Fillet Polyhedral SrTiO₃

Wang,

Jia,

Zhang

et al. 2024

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Strontium titanium (SrTiO3) is a promising photocatalyst, but enhancing the separation, migration, and utilization of photocarriers, requires SrTiO3 with exposed anisotropic facets and minimal defect density. Here, we used NaCl and SrCl2 as fluxes to synthesize fillet polyhedral SrTiO3 particles, with Al3+ selectively adsorbed as the morphology regulator on high‐energy crystal facets. Notably, Al‐doped SrTiO3 synthesized in SrCl2 exhibits regular polyhedral morphology with {100}, {110}, and high‐index {112} facets, showing high surface activity, low internal defect density, and superior photocatalytic performance. The excellent performance is attributed to the spatial separation of photocarriers on different crystal facets. In situ photodeposition experiments confirmed that photogenerated electrons were concentrated on the {100} facets, while holes were concentrated on the {110} and {112} facets, effectively impeding recombination. After loading RhCrOx/CoOx, Al‐doped SrTiO3 synthesized in SrCl2 achieves a hydrogen evolution rate of 255 µmol h−1, 64 times higher than that of Al‐doped SrTiO3 synthesized in NaCl. Additionally, increasing amounts of cocatalysts further enhances the photocatalytic performance, with the average hydrogen evolution rate of SrTiO3 reaching 319 µmol h⁻¹, an apparent quantum yield of 3.5% at 365 nm, and a solar‐to‐ hydrogen value of 0.181%. This discovery offers new insights into designing efficient photocatalysts for hydrogen production.

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Geometric data analysis-based machine learning for two-dimensional perovskite design

Hu,

Mayengbam,

et al. 2024

Commun Mater

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With extraordinarily high efficiency, low cost, and excellent stability, 2D perovskite has demonstrated a great potential to revolutionize photovoltaics technology. However, inefficient material structure representations have significantly hindered artificial intelligence (AI)-based perovskite design and discovery. Here we propose geometric data analysis (GDA)-based perovskite structure representation and featurization and combine them with learning models for 2D perovskite design. Both geometric properties and periodicity information of the material unit cell, are fully characterized by a series of 1D functions, i.e., density fingerprints (DFs), which are mathematically guaranteed to be invariant under different unit cell representations and stable to structure perturbations. Element-specific DFs, which are based on different site combinations and atom types, are combined with gradient boosting tree (GBT) model. It has been found that our GDA-based learning models can outperform all existing models, as far as we know, on the widely used new materials for solar energetics (NMSE) databank.

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strong synergistic effect of the (110) and (100) facets of the SrTiO₃ perovskite micro/nanocrystal: decreasing the binding energy of exciton and superb photooxidation capability for Co²⁺

Abstract: We have obtained self-trapping excitons (STEs) with an ultra-low binding energy by regulating the synergistic effect of (100) and (110) facets in the SrTiO3 micro-nano crystal, which processed super photo-oxidation performance for Co2+.

Cited by 4 publications

References 34 publications

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

Effect of Different Molten Salts on Structure and Water Splitting Performance of Al‐Doped Fillet Polyhedral SrTiO₃

Geometric data analysis-based machine learning for two-dimensional perovskite design

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strong synergistic effect of the (110) and (100) facets of the SrTiO3 perovskite micro/nanocrystal: decreasing the binding energy of exciton and superb photooxidation capability for Co2+

Abstract: We have obtained self-trapping excitons (STEs) with an ultra-low binding energy by regulating the synergistic effect of (100) and (110) facets in the SrTiO3 micro-nano crystal, which processed super photo-oxidation performance for Co2+.

Cited by 4 publications

References 34 publications

A unique octadecahedron SrTiO3 perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

A unique octadecahedron SrTiO3 perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

Effect of Different Molten Salts on Structure and Water Splitting Performance of Al‐Doped Fillet Polyhedral SrTiO3

Geometric data analysis-based machine learning for two-dimensional perovskite design

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Product

Resources

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strong synergistic effect of the (110) and (100) facets of the SrTiO₃ perovskite micro/nanocrystal: decreasing the binding energy of exciton and superb photooxidation capability for Co²⁺

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

A unique octadecahedron SrTiO₃ perovskite oxide with a nano step-shaped facet structure for enhanced photoredox and hydrogen evolution performance

Effect of Different Molten Salts on Structure and Water Splitting Performance of Al‐Doped Fillet Polyhedral SrTiO₃