کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1592579 1515640 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
One-step solvothermal synthesis of ZnO–carbon composite spheres containing different amounts of carbon and their use as visible light photocatalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
One-step solvothermal synthesis of ZnO–carbon composite spheres containing different amounts of carbon and their use as visible light photocatalysts
چکیده انگلیسی

To reduce its band gap of ZnO, a simple synthesis of ZnO–carbon composite spheres was developed using one-step solvothermal treatment of ethanol, Zn(Ac)2·2H2O, and iodine. During the process, alcoholysis of zinc ions and carbonization of ethanol occurred simultaneously with catalysis by iodine. Ethanol acts as both solvent and carbon precursor. The mass of iodine used in the reaction affected the shape and carbon amount-of-substance fraction of the composite. The photocatalytic activities of composites with different carbon amount-of-substance fractions were evaluated by the degree of degradation of aqueous solutions of rhodamine B at room temperature with visible light irradiation. The best photocatalytic activity was observed for a sample with a carbon amount-of-substance fraction of 30%. The formation mechanism involves iodine promotion of the oxidation of ethanol, which results in formation of carbon that self-assembles with the ZnO into the ZnO–C composite spheres.


► ZnOC composite spheres are fabricated by a one-step solvothermal synthesis.
► Zinc alcoholysis and ethanol carbonization occur simultaneously.
► Iodine acts as a catalyst in the reaction.
► The mass of iodine affects the composite's C amount-of-substance fraction.
► Photocatalytic activity is highest with a C amount-of-substance fraction of 30%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 155, February 2013, Pages 53–56
نویسندگان
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