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Title: Microwave-Assisted Synthesis of Perovskite SrSnO3 Nanocrystals in Ionic Liquids for Photocatalytic Applications

Journal Article · · Inorganic Chemistry
 [1];  [2];  [2];  [3];  [4]
  1. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering. Center for Catalysis; Ames Lab., Ames, IA (United States); Ruhr Univ., Bochum (Germany). Faculty of Chemistry and Biochemistry
  2. Ruhr Univ., Bochum (Germany). Faculty of Chemistry and Biochemistry
  3. Ruhr Univ., Bochum (Germany). Faculty of Chemistry and Biochemistry; Univ. of Oldenburg (Germany). Inst. of Chemistry
  4. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering. Center for Catalysis; Ames Lab., Ames, IA (United States); Ruhr Univ., Bochum (Germany). Faculty of Chemistry and Biochemistry; Stockholm Univ. (Sweden). Dept. of Materials and Environmental Chemistry
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Nanosized SrSnO3 photocatalysts have been successfully synthesized by microwave synthesis in various ionic liquids (ILs) followed by a heat treatment process to optimize the materials’ crystallinity. The influence of the ILs with various cations such as 1-butyl-3-methylimidazolium ([C4mim]+), 6-bis(3-methylimidazolium-1-yl)hexane ([C6(mim)2]2+), butylpyridinium ([C4Py]+), and tetradecyltrihexylphosphonium ([P66614]+) and bis(trifluoromethanesulfonyl)amide ([Tf2N]-) as the anion on the structure, crystallization, and morphology of the products was investigated. The samples were characterized by X-ray diffraction (XRD), thermogravimetry (TG), scanning electron microscopy (SEM), surface area analysis by gas adsorption, X-ray photoelectron spectroscopy (XPS), diffuse reflectance UV–vis spectroscopy, and Raman and IR spectroscopy. According to structure characterization by XRD and Raman spectroscopy all samples crystallized phase-pure in the orthorhombic GdFeO3 perovskite structure type. SEM reveals that, on the basis of the IL, the obtained SrSnO3 nanoparticles exhibit different morphologies and sizes. Rod-shaped particles are formed in [C4mim][Tf2N], [C6(mim)2][Tf2N]2, and [P66614][Tf2N]. However, the particle dimensions and size distribution vary depending on the IL and range from quite thin and long needlelike particles with a narrow size distribution obtained in [P66614][Tf2N] to relatively larger particles with a broader size distribution obtained in [C6(mim)2][Tf2N]2. In contrast, in [C4Py][Tf2N] nanospheres with a diameter of about 50 nm form. For these particles the highest photocatalytic activity was observed. Our investigations indicate that the improved photocatalytic activity of this material results from the synergistic effect of the relatively large surface area associated with nanosize and an appropriate energy band structure.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Ruhr Univ., Bochum (Germany); Iowa State Univ., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1399481
Report Number(s):
IS-J9378
Journal Information:
Inorganic Chemistry, Vol. 56, Issue 12; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

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Surface Chemistry of All Inorganic Halide Perovskite Nanocrystals: Passivation Mechanism and Stability journal March 2018
CsPbBr 3 and CH 3 NH 3 PbBr 3 promote visible-light photo-reactivity journal January 2018
Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents journal December 2019

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY