Citation: LI Chang-Yu, LIU Shou-Xin, MA Yue. Preparation of Visible-Light Response Cu-Cu2+1O Composites by a One-Step Hydrothermal Method[J]. Acta Physico-Chimica Sinica, 2009, 25(08): 1555-1560. doi: 10.3866/PKU.WHXB20090745
可见光响应Cu-Cu2+1O复合材料的水热法一步合成
采用水热合成法, 以Cu(NO3)2为原料, 乙二醇为溶剂和还原剂, 聚乙烯吡咯烷酮k30(PVP)为表面活性剂, 一步合成可见光响应Cu-Cu2+1O 金属-半导体复合材料. 采用X射线衍射(XRD)、透射电子显微镜(TEM)和紫外-可见漫反射光谱(DRS)观测复合材料的相结构、表观形貌、粒子尺寸和光谱特征. 以苯酚为模型物, 氙灯照射下测试催化剂活性. 结果显示表面活性剂PVP的加入对产物晶相结构不产生影响, 但促进Cu2+1O还原, 并影响Cu和Cu2+1O两种粒子的尺寸分布和界面结合, 进而影响产物的催化性能. 活性测试结果表明, Cu-Cu2+1O金属-半导体复合材料具有可见光催化活性, 其对苯酚降解符合一级反应动力学.
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关键词:
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光催化活性
- / 可见光响应
- / Cu-Cu2+1O
- / 金属-半导体复合材料
English
Preparation of Visible-Light Response Cu-Cu2+1O Composites by a One-Step Hydrothermal Method
Visible-light response Cu-Cu2+1O metal-semiconductor nanocrystal composites were prepared using a one-step hydrothermal method with Cu(NO3)2 as starting material, ethylene glycol (EG) as solvent and reductant, and polyvinypyrrolidone k30 (PVP) as surfactant. The prepared composites were characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-Vis diffuse reflectance spectrum (DRS). The photocatalytic performance was tested using phenol degradation under xenon lamp irradiation. Results show that PVP has almost no effect on the crystal structure of the prepared powders but promotes the deoxidization of Cu2+1O and affects the particle size distribution, interface combination, and the photocatalytic activity of Cu and Cu2+1O. Activity results show that Cu-Cu2+1O particles can degrade phenol and the kinetics fits a first-order reaction.
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