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通过两步法合成铜掺杂的氧化锌纳米棒,通过X射线衍射(XRD)、扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)和紫外-可见(UV-Vis)分光光谱等技术对系列样品进行了表征,研究并探索了铜掺杂的氧化锌纳米棒光降解染料罗丹明B(Rh B)和气体乙醛的催化活性。通过对多孔Cu掺杂ZnO纳米棒光催化分解乙醛进行了评价。多孔Cu掺杂ZnO纳米棒(CZ-5)光催化剂具有最高的催化分解乙醛的能力,比其它多孔Cu掺杂ZnO纳米棒具有很高的催化活性。多孔Cu掺杂ZnO纳米棒光催化剂在室温下在可见光(435 nm)下照射16 h,5.50×10-4(φ,体积分数)的乙醛气体完全降解为二氧化碳(CO_2)。多孔铜掺杂的氧化锌纳米棒光催化剂的光催化性能的改善主要归因于铜和氧化锌纳米棒之间的协同作用。这种改进的光催化协同作用归因于Cu掺杂ZnO的可见光吸收的延伸和光生电子空穴对的抗重组。
Copper-doped zinc oxide nanorods were synthesized by a two-step method and characterized by X-ray diffraction (XRD), scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV- -Vis) spectrophotometry. The catalytic activity of copper-doped zinc oxide nanorods photocatalytic degradation of rhodamine B (Rh B) and gaseous acetaldehyde was investigated and explored. The photocatalytic degradation of acetaldehyde by porous Cu-doped ZnO nanorods was evaluated. Porous Cu-doped ZnO nanorods (CZ-5) photocatalysts have the highest ability to catalyze the decomposition of acetaldehyde, and have higher catalytic activity than other porous Cu-doped ZnO nanorods. Porous Cu-doped ZnO nanorod photocatalysts were completely degraded into carbon dioxide (CO 2) with acetaldehyde gas of 5.50 × 10-4 (φ, volume fraction) at room temperature under visible light (435 nm) for 16 h. The improvement of the photocatalytic performance of the porous copper-doped zinc oxide nanorods photocatalysts is attributed mainly to the synergy between the copper and zinc oxide nanorods. This improved photocatalytic synergy results from the extension of the visible light absorption of Cu-doped ZnO and the anti-recombination of photo-generated electron-hole pairs.