Preparation, Conversion, and Comparison of the Photocatalytic and Electrochemical Properties of ZnS(en)0.5, ZnS, and ZnO

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• 作者：Yonghong Ni ; Xiaofeng Cao ; Guangzhi Hu ; Zhousheng Yang ; Xianwen Wei ; Yonghong Chen ; Jun Xu
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：February 2007
• 年：2007
• 卷：7
• 期：2
• 页码：280 - 285
• 全文大小：784K
• 年卷期：v.7,no.2(February 2007)
• ISSN：1528-7505

文摘

In the present paper, we report the successful synthesis of a ZnS(en)_0.5 complex (en = ethylenediamine) with acuboid morphology by a solvothermal method employing zinc powder and sulfur powder as the reactants in ethylenediamine andfurther conversion to ZnS and ZnO. Research showed that the morphology hardly changed after the ZnS(en)_0.5 complex had beenconverted into ZnS in a vacuum at 450 C for 40 min and that nearly spherical ZnO grains with a mean diameter of 300 nm wereobtained after the ZnS(en)_0.5 complex was oxidized in air at 650 C for 40 min. Also, the experiments indicated that ZnS(en)_0.5,ZnS, and ZnO could degrade safranine T, an organic dye, under irradiation of 254 nm UV light and that ZnS had better photocatalyticdegradation properties than ZnS(en)_0.5 and ZnO after irradiation for 30 min. The electrochemical studies showed that ZnS and ZnOhad a stronger ability to promote electron transfers between hemoglobin (Hb) and the Au electrode than ZnS(en)_0.5 but had a weakerability to accelerate electron transfers between catechol and the Au electrode than ZnS(en)_0.5. The possible mechanisms are discussed.