Transformation Process and Photocatalytic Activities of Hydrothermally Synthesized Zn2SnO4 Nanocrystals
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文摘
In this study, a systematic approach was applied to the hydrothermal synthesis of Zn2SnO4 (ZTO) nanocrystalsto gain insight into the fundamental factors controlling phase composition, particle size, crystal morphologyand photocatalytic activity. The influence of various operating conditions, such as reaction temperature, alkalineconcentration, duration time, and additive surfactants on the treatment process were investigated. By combiningthe results of X-ray diffraction (XRD), electron microscopy (SEM/TEM/ED/HRTEM), Raman and FT-IRspectroscopy, a complete structural and morphological characterization of the products was performed. Theresults indicated that the phase transformation probably evolved via a "dissolution-recrystallization" mechanismand accompanying the "Ostwald ripening" process. Furthermore, a correlation between the photocatalyticactivity in the UV photodegradation of MB solutions and the particle properties was established.