混合溶剂热法合成Ag／AgBr复合物及其光催化性质

以AgN03，KBr为原料，运用混合溶剂热法合成了Ag／AgBr光催化剂，利用X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电镜（SEM）、电子衍射能谱（EDS）、紫外-可见（UV—Vis）光谱等技术对样品进行了表征。以甲基橙（MO），甲基蓝（Mb），罗丹明B（RhB）为目标降解物，考察了该光催化剂在可见光辐射下（λ〉420nm）的光催化性能。并且进行了不同的合成方法、尿素与十二烷基苯磺酸钠（SDBS）的不同用量、乙二醇与乙醇的不同体积比对Ag／AgBr样品光催化性能的影响。结果表明：混合溶剂热法合成样品的光催化活性要高于水热法合成的样品，尿素与SDBS的添加量分别为10mmol和0．2g，乙二醇与乙醇的体积比为3：1时，复合物Ag／AgBr表现出最佳的光催化性能。

Mixed Solvothermal Preparation of Ag / AgBr Composite and Their Photocatalytic Properties

The photocatalyst of Ag / AgBr was prepared from AgNO3 and KBr by way of mixed solvothermal method; the obtained products were characterized by X-ray diffraction （XRD）, transmission electron microscopy （ TEM）, scanning electron microscopy （ SEM）, electron diffi＇action spectroscopy （ EDS ） and UV-visible （ UV- Vis） spectroscopy. The photodegradation of methyl orange （ MO）, methylene blue （ Mb）, Rhodamine B （RhB） were used to evaluate the photocatalytic performance of Ag / AgBr under the visible light irradiation （λ 〉 420 nm）. The effect of different methods with SDBS and urea dosage, and the volume ratio of ethylene glycol and ethanol on the degradation of Ag / AgBr were investigated. The results indicate that the photocatalytic activities of Ag/ AgBr prepared by mixed solvothermal method were higher than others prepared by the hydrothermal method. The best amount of urea and SDBS was 10 mmol and 0.2 g. What＇s more, the composite Ag / AgBr showed optimal photocatalytic activity with a volume ratio of 3：1 of ethylene glycol and ethanol.