水热法合成Ag2C03／ZnO异质结复合光催化剂及其光催化性能

采用水热法合成了一系列不同Ag2CO3含量的新型Ag2CO/ZnO异质结复合光催化剂，运用X射线粉末衍射（XRD）、扫描电镜（SEM）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、紫外-可见漫反射吸收光谱（UV-visDRS）等系列手段对所制备的光催化剂进行了表征，并以紫外光（254nm）为光源，评价了催化剂光催化降解甲基橙的活性，考察了不同Ag2CO3复合量、不同水热温度对ZnO复合光催化剂反应活性的影响．结果表明．当Ag2CO3含量为2％、水热温度为140℃，复合光催化剂具有最大的光催化活性，降解率达到86．31％．Ag2CO3/ZnO异质结复合光催化剂具有更高的光催化活性主要原因是复合光催化剂对紫外光有很强的吸收能力，适量A龅C03能提高光生电子一空穴对的分离效率，并改善催化剂的物理性能．

Hydrothermal synthesis and photocatalytic performance of Ag2CO3/ZnO heterostructures composite photocatalyst

A series of novel Ag2COJZnO heterostructures composite pnotocmalysts were hydrothermal method. The prepared photocatalysts were characterized by X-ray diffraction （XRD）, Scanning electron microscope （SEM）, X-ray photoelectron spectroscopy （XPS）, Fourier transform infrared spectroscope （FT-IR）, and UV-vis diffuse reflectance spectra, respectively. The photocatalytic activity of the prepared samples was evaluated by photocatalytic degradation of methyl orange （MO） under UV light （λ=254 nm） irradiation. The different Ag2CO3 compound quantity and different hydrothermal temperature of ZnO composite photocatalyst were researched. The results show that the photocatalyst prepared with two-percent of Ag2CO3 and 140 °C of hydrothermal temperature exhibits the highest photocatalytic activity, owing to the 86.31% of degradation rate. The high photocatalytic performance of the heterostructures composite photocatalysts could be attributed to the strong UV light absorption. A certain amount of Ag2CO3 could improve the separation efficiency of the e-/h＋ pairs and the physical property of the catalysts.