### Au纳米粒子负载的ZnO空心球复合材料的光生电荷转移行为及光催化活性

• 收稿日期:2016-01-20 发布日期:2016-07-29
• 通讯作者: 林艳红 E-mail:linyh@jlu.edu.cn
• 基金资助:
国家自然科学基金(51572106);国家自然科学基金(21173103);国家自然科学基金(51172090)

### Photogenerated Charge-Transfer Properties of Au-Loaded ZnO Hollow Sphere Composite Materials with Enhanced Photocatalytic Activity

Fei ZHAO,Lin-Qi SHI,Jia-Bao CUI,Yan-Hong LIN*()

• Received:2016-01-20 Published:2016-07-29
• Contact: Yan-Hong LIN E-mail:linyh@jlu.edu.cn
• Supported by:
the National Natural Science Foundation of China(51572106);the National Natural Science Foundation of China(21173103);the National Natural Science Foundation of China(51172090)

Abstract:

Au/ZnO hollow spheres with different mass ratios were synthesized by a simple two-step method. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) were used to characterize the as-prepared Au/ZnO hollow spheres. The photocatalytic activity of the Au/ZnO composites was evaluated by the degradation of rhodamine B (RhB) dye under white light. Compared with pure ZnO hollow spheres, the degradation rate of RhB was enhanced by 73%with the appropriate amount of Au in the modified ZnO photocatalysts. The influence of Au decoration on the surface photo-induced charge-transfer behaviour of ZnO was investigated by surface photovoltage spectroscopy (SPS) and transient photovoltage (TPV). The results showed that the improved photodegradation by Au/ZnO hollow spheres was mostly caused by the strong electronic interactions between ZnO and the Au nanoparticles. The appropriate load of Au nanoparticles in ZnO promoted the separation of photogenerated charges, thus extending the transmission time of the charge carrier and increasing the lifetime of the photogenerated charges, resulting in highly efficient photocatalysis.

MSC2000:

• O643