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分别采用水热法(AgxS-H)和原位离子交换法(AgxS-IE)制备了AgxS.采用扫描电镜(SEM)、X射线衍射光谱、紫外可见近红外吸收光谱、N2吸附-脱附、X射线光电子能谱和表面光电压测试对催化剂进行了表征.以光(λ≥420 nm)降解亚甲基蓝为模型反应,考察了AgxS的光催化性能.与AgxS-IE相比,AgxS-H具有较小的粒径、较大的禁带宽度、较低光生电荷复合率,因此具有较高的光催化活性.此外,AgxS-H还表现了较好的稳定性,循环使用五次仍能够保持较高的光催化活性.结果表明,AgxS光催化降解亚甲基蓝主要以羟基自由基氧化为主,光生空穴氧化为辅的光催化氧化过程.AgxS-H作为一种有效的光催化剂,在降解有机染料污水方面具有潜在的应用价值.
AgxS was prepared by hydrothermal method (AgxS-H) and in-situ ion exchange method (AgxS-IE). The surface morphology of AgxS was characterized by scanning electron microscopy (SEM), X-ray diffraction, UV-Vis absorption, N2 adsorption-desorption, X-ray photoelectron spectroscopy and surface photovoltage were used to characterize the photocatalytic activity of AgxS. The photocatalytic activity of AgxS was investigated by photodegradation of methylene blue (λ≥420 nm) as a model reaction. Compared with AgxS-IE, AgxS-H had a smaller AgxS-H also showed better stability, and remained stable after five cycles of application The photocatalytic activity of AgxS photocatalytic degradation of methylene blue mainly hydroxyl radical oxidation, assisted by photo-hole oxidation supplemented photocatalytic oxidation process.AgxS-H as an effective photocatalyst in the degradation of organic dye wastewater It has potential application value.