Atmospheric-pressure cold plasma for synthesizing Ag modified Degussa P25 with visible light activity using dielectric barrier discharge
Atmospheric-pressure cold plasma for synthesizing Ag modified Degussa P25 with visible light activity using dielectric barrier discharge
复制标题
大气压冷等离子体利用介质阻挡放电合成具有可见光活性的Ag改性Degussa P25
DOI：
10.1016/j.cattod.2013.03.020
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发表时间：
2013-08-01
期刊：
影响因子：
5.3
通讯作者：
Zhang, Xiuling
中科院分区：
文献类型：
--
作者：
Di, Lanbo;Xu, Zhijian;Zhang, Xiuling
采用常压冷等离子体制备Ag/TiO2可见光光催化剂。 UV-vis、XPS 和 XRD 光谱用于研究 Ag/TiO2 样品中的 Ag 价态。紫外可见光谱表明，等离子处理后出现了金属银纳米粒子，并且当放电电压增加时，表面等离激元峰变得更窄并且向更短的波长移动。 XPS和XRD谱证明Ag离子完全还原为金属Ag纳米颗粒。通过透射电子显微镜（TEM）观察 Ag/TiO2 样品的形貌。在 36 kV 下制备的 Ag/TiO2 样品的 TEM 显微照片显示，Ag 纳米颗粒的平均粒径约为 100 nm。 7.4纳米。 Ag/TiO2 样品的光催化活性通过可见光（λ > 420 nm）下亚甲基蓝（MB）的光降解来评估。与Degussa P25相比，DBD冷等离子体制备的Ag/TiO2催化剂表现出较高的MB降解活性。大气压DBD冷等离子体可高效制备负载型金属Ag催化剂。 (C) 2013 Elsevier B.V. 保留所有权利。
Atmospheric-pressure cold plasma was employed to fabricate Ag/TiO2 visible light photocatalyst. UV-vis, XPS and XRD spectra were used to investigate Ag valence in the Ag/TiO2 samples. UV-vis spectra indicated that metal Ag nanoparticles were present after plasma treatment, and the surface plasmon peak became narrower and shifted to shorter wavelengths when the discharge voltage was increased. XPS and XRD spectra proved that Ag ions were completely reduced to metallic Ag nanoparticles. The morphologies of the Ag/TiO2 samples were observed by transmission electron microscopy (TEM). TEM micrographs of the Ag/TiO2 sample fabricated at 36 kV showed that the average particle size of Ag nanoparticles was ca. 7.4 nm. Photocatalytic activity of the Ag/TiO2 samples was evaluated by photodegradation of methylene blue (MB) under visible light (lambda > 420 nm). Compared with Degussa P25, the Ag/TiO2 catalyst fabricated by DBD cold plasma exhibited a high activity for MB degradation. Atmospheric-pressure DBD cold plasma was highly efficient for preparation of supported metallic Ag catalyst. (C) 2013 Elsevier B.V. All rights reserved.