Das, Partha Pratim and Sujatha Devi, P and Blom, Douglas A and Vogt, Thomas and Lee, Yongjae (2019) High-Pressure Phase Transitions of Morphologically Distinct Zn2SnO4 Nanostructures. ACS Omega, 4 (6). pp. 10539-10547. ISSN 2470-1343

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Many aspects of nanostructured materials at high pressures are still unexplored. We present here, high-pressure structural behavior of two Zn2SnO4 nanomaterials with inverse spinet type, one a particle with size of similar to 7 nm zero dimensional (0-D)] and the other with a chain-like one dimensional (1-D)] morphology. We performed in situ micro-Raman and synchrotron X-ray diffraction measurements and observed that the cation disordering of the O-D nanoparticle is preserved up to similar to 40 GPa, suppressing the reported martensitic phase transformation. On the other hand, an irreversible phase transition is observed from the 1-D nanomaterial into a new and dense high-pressure orthorhombic CaFe2O4-type structure at similar to 40 GPa. The pressure-treated 0-D and 1-D nanomaterials have distinct diffuse reflectance and emission properties. In particular, a heterojunction between the inverse spinet and quenchable orthorhombic phases allows the use of 1-D Zn2SnO4 nanomaterials as efficient photocatalysts as shown by the degradation of the textile pollutant methylene blue.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 14 Nov 2019 07:04
Last Modified: 14 Nov 2019 07:04
URI: http://cgcri.csircentral.net/id/eprint/4587

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