Preparation and photocatalytic activity of Ag/bamboo-type TiO2 nanotube composite electrodes for methylene blue degradation
作者： Xinning Luan , Ying Wang
DOI: 10.1016/J.MSSP.2013.10.023
关键词: Deposition (chemistry) 、 Nanotechnology 、 Degradation (geology) 、 Electrochemistry 、 Aqueous solution 、 Materials science 、 Methylene blue 、 Chemical engineering 、 Electrode 、 Nanotube 、 Photocatalysis
摘要: Photocatalysis phenomena in TiO2 have been intensively investigated for its potential application environmental remediation. The present work reports improved photocatalytic degradation of methylene blue dye aqueous solution by using bamboo-type nanotubes deposited with Ag nanoparticles via electrochemical deposition. processes are performed on Ag-modified nanotube arrays, smooth-walled and bare arrays. Both arrays show efficiencies (64.4% 52.6%) compared to the same length (44.4%), due enhanced electron–hole seperation more surface area provided bamboo ridges. activity kinetic behavior also optmized tuning pulse deposition time nanoparticles. Bamboo-type 0.5 s/1.5 s shows highest efficiency 78.5%, which represents 21.9% 76.8% enhancement those nanotubes, respectively, indicating that a proper amount can maximize processes. In addition, overly long will not further increase agglomeration paticles. For example, when is increased 2 s/6 s, array exhibits lower 62.9%.
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