Li Ying, Liu Tie, Feng Shuang, Yang Wenshu, Zhu Ying, Zhao Yingying, Liu Zhiyan, Yang Haibin, Fu Wuyou
State Key Laboratory of Superhard Materials, Jilin University, Qianjin Street 2699, Changchun 130012, China.
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Nanomaterials (Basel). 2021 Jan 17;11(1):233. doi: 10.3390/nano11010233.
Herein, a novel actinomorphic flower-like ZnO/Au/CdS nanorods ternary composite photocatalyst is prepared to extend the light-responsive range, reduce the photogenerated charge carriers recombination, and ultimately improve the water splitting performance. Flower-like ZnO nanorods are synthesized by a chemical bath method and the CdS nanoparticles are sensitized by successive ionic layer adsorption and reaction method. Then the Au nanoparticles as co-catalysts are introduced by the photodeposition method to modify the interface of ZnO/CdS for reducing the photogenerated electron recombination rate and further improving the performance of water splitting. Detailed characterizations and measurements are employed to analyse the crystallinity, morphology, composition, and optical properties of the flower-like ZnO/Au/CdS nanorods samples. As a result, the flower-like ZnO/Au/CdS nanorod samples present significantly enhanced water splitting performance with a high gas evolution rate of 502.2 μmol/g/h, which is about 22.5 and 1.5 times higher than that of the pure ZnO sample and ZnO/CdS sample. The results demonstrate that the flower-like ZnO/Au/CdS nanorods ternary composite materials have great application potential in photocatalytic water splitting for the hydrogen evolution field.
在此，制备了一种新型的辐射对称花状ZnO/Au/CdS纳米棒三元复合光催化剂，以扩大光响应范围，减少光生载流子复合，最终提高水分解性能。通过化学浴法合成花状ZnO纳米棒，并采用连续离子层吸附和反应法对CdS纳米颗粒进行敏化。然后通过光沉积法引入Au纳米颗粒作为助催化剂，修饰ZnO/CdS的界面，以降低光生电子复合率，进一步提高水分解性能。采用详细的表征和测量方法来分析花状ZnO/Au/CdS纳米棒样品的结晶度、形貌、组成和光学性质。结果表明，花状ZnO/Au/CdS纳米棒样品的水分解性能显著增强，析气速率高达502.2 μmol/g/h，分别约为纯ZnO样品和ZnO/CdS样品的22.5倍和1.5倍。结果表明，花状ZnO/Au/CdS纳米棒三元复合材料在光催化水分解制氢领域具有巨大的应用潜力。
