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Title: Ionic-Liquid-Assisted Microwave Synthesis of Solid Solutions of Sr1–xBaxSnO3 Perovskite for Photocatalytic Applications

Journal Article · · ChemSusChem
 [1];  [2];  [2]; ORCiD logo [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States); Stockholm Univ., Stockholm (Sweden)

Nanocrystalline Sr1–xBaxSnO3 (x = 0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the structure, crystallization, morphology, and photocatalytic efficiency was investigated and the samples were fully characterized. On the basis of X-ray diffraction results, as the Ba content in the SrSnO3 lattice increases, a symmetry increase was observed from the orthorhombic perovskite structure for SrSnO3 to the cubic BaSnO3 structure. The analysis of the sample morphology by SEM reveals that the Sr1–xBaxSnO3 samples favor the formation of nanorods (500 nm–5 μm in diameter and several micrometers long). The photophysical properties were examined by UV/Vis diffuse reflectance spectroscopy. The band gap decreases from 3.85 to 3.19 eV with increasing Ba2+ content. Furthermore, the photocatalytic properties were evaluated for the hydroxylation of terephthalic acid (TA). The order of the activities for TA hydroxylation was Sr0.8Ba0.2SnO3 > SrSnO3 > BaSnO3 > Sr0.6Ba0.4SnO3 > Sr0.2Ba0.8SnO3. Here, the highest photocatalytic activity was observed for Sr0.8Ba0.2SnO3, and this can be attributed to the synergistic impacts of the modification of the crystal structure and morphology, the relatively large surface area associated with the small crystallite size, and the suitable band gap and band-edge position.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1396275
Report Number(s):
IS-J-9454
Journal Information:
ChemSusChem, Vol. 10, Issue 17; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (8)

Perowskitoxid‐Elektroden zur leistungsstarken photoelektrochemischen Wasserspaltung journal August 2019
Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting journal August 2019
Energy-level engineering of the electron transporting layer for improving open-circuit voltage in dye and perovskite-based solar cells journal January 2019
Interstitial N-doped SrSnO 3 perovskite: structural design, modification and photocatalytic degradation of dyes journal January 2019
An aqueous synthesis of porous PtPd nanoparticles with reversed bimetallic structures for highly efficient hydrogen generation from ammonia borane hydrolysis journal January 2020
Bias-tuned dielectric properties and Non-Debye relaxation in vanadium doped BaSnO 3 nanocubes journal August 2019
Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents journal December 2019
New Developments in Material Preparation Using a Combination of Ionic Liquids and Microwave Irradiation journal April 2019

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