Photocatalytic Properties of Calcium Titanate Nanomaterials

Calcium titanate (CaTiO3) nanoparticles exhibit a perovskite‐type crystal structure that confers a direct bandgap in the near-ultraviolet to visible region, making them effective semiconductor photocatalysts. At the nanoscale, tailored morphologies and high surface areas enhance light absorption and provide abundant active sites for redox reactions. Intrinsic limitations—chiefly rapid electron–hole recombination—have been addressed through doping with metals or rare‐earth elements, formation of heterojunctions with secondary oxide phases and the creation of surface defects. These strategies improve charge separation and extend light‐harvesting into the visible spectrum. CaTiO3‐based photocatalysts have demonstrated pronounced efficiency in degrading organic pollutants (such as industrial dyes and pharmaceutical residues) and hold promise for applications in water treatment, air purification and solar fuel generation. Scalable synthetic routes—ranging from sol–gel and hydrothermal techniques to polymeric precursor methods—allow precise control over crystallinity, porosity and optical properties, facilitating the translation of laboratory advances into practical environmental remediation technologies.

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Photocatalytic Properties of Calcium Titanate Nanomaterials publication trend

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Technical terms

Perovskite structure: A crystal arrangement of the form ABX3, where A and B are cations of different sizes and X is an anion, noted for versatile electronic and optical properties.

Bandgap energy: The energy difference between a semiconductor’s valence and conduction bands, determining the threshold wavelength of light that can generate charge carriers.

Doping: The intentional incorporation of impurity atoms into a semiconductor lattice to tune electronic structure and improve photocatalytic performance.

Photocatalysis: A process in which light irradiation activates a semiconductor material to drive chemical reactions, often used for pollutant degradation.

References

1. Nanoparticles of the Perovskite-Structure CaTiO3 System: The Synthesis, Characterization, and Evaluation of Its Photocatalytic Capacity to Degrade Emerging Pollutants. Nanomaterials (2023).
2. Synthesis, Properties and Photocatalytic Activity of CaTiO3-Based Ceramics Doped with Lanthanum. Nanomaterials (2022).
3. CaTiO3: Influence of Ag Doping on Photocatalytic Activity for Application in Rhodamine B dye Removal. Materials Research (2024).