Mechanochemical synthesis of nanocrystalline SnO2–ZnO photocatalysts
作者： Aaron Dodd , Allan McKinley , Martin Saunders , Takuya Tsuzuki
DOI: 10.1088/0957-4484/17/3/013
关键词: Specific surface area 、 Doping 、 Anhydrous 、 Chemical engineering 、 Photocatalysis 、 Materials science 、 Inorganic chemistry 、 Chloride 、 Nanocrystalline material 、 Oxide 、 Hydration reaction
摘要: Mechanochemical processing of anhydrous chloride precursors with Na2CO3 has been investigated as a means manufacturing nanocrystalline SnO2 doped ZnO photocatalysts. High-energy milling and heat-treatment 0.1SnCl2+0.9ZnCl2+Na2CO3+4NaCl reactant mixture was found to result in the formation composite powder consisting oxide grains embedded within matrix NaCl. Subsequent washing deionized water resulted removal NaCl phase partial hydration reaction product consequent ZnSn(OH)6. The extent this decrease linear fashion temperature post-milling over range 400–700 °C. For 700 °C, exhibit significantly higher photocatalytic activity than either single-phase or powders that were synthesized using similar conditions. heightened attributed its specific surface area enhanced charge separation arising from coupling SnO2.
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