Abstract
The immobilization of SnO2 nanocrystals on solid substrates for practical photocatalytic applications suffers from poor adhesion that will lead to loss of photocatalytic activity and short service life. An efficient hydrothermal synthesis of SnO2 nanocrystals embedded in nanopore arrays on stainless steel surface was presented in this paper. The morphology, chemical composition and microstructure of the embedded tin oxide nanocrystals were investigated by X-ray diffraction, field-emission scanning electron microscope, X-ray photoelectron spectroscopy and UV-visible diffuse reflectance spectroscopy. The photocatalytic activity and stability of SnO2 nanocrystals was evaluated by photodegradation of methylene blue. SnO2 nanocrystals embedded in nanopore arrays on stainless steel surface existed in a tetragonal rutile structure. The increasing of the hydrothermal temperature will lead to the improvement in photocatalytic activity of SnO2 nanocrystals. The SnO2 nanocrystals prepared at 220 °C performed the highest photocatalytic activity and good photocatalytic stability, indicating the effective immobilization of SnO2 nanocrystals on anodized stainless steel.
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This work was supported by the National Natural Science Foundation of China (Nos. 50771075, 51171133) and the Program for New Century Excellent Talents in University (No. NCET-07-0650).
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Zhan, W., Ni, H., Chen, R. et al. Tin oxide nanocrystals embedded in nanopore arrays on stainless steel surface for photocatalytic applications. Appl. Phys. A 115, 1381–1386 (2014). https://doi.org/10.1007/s00339-013-8016-5
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DOI: https://doi.org/10.1007/s00339-013-8016-5