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Article

Green Synthesized Palladium Coated Titanium Nanotube Arrays for Simultaneous Azo-Dye Degradation and Hydrogen Production

1
Institute of Environmental Engineering, National Sun Yat-sen University, Kaoshiung 804, Taiwan
2
Department of Electrical Engineering, Cheng Shiu University, Kaoshiung 804, Taiwan
3
Center for Environmental Toxin and Emerging Contaminant Research, Cheng Shiu University, Kaoshiung 804, Taiwan
4
Super Micro Research and Technology Center, Cheng Shiu University, Kaoshiung 804, Taiwan
5
Department of Chemical and Materials Engineering, Southern Taiwan University of Science and Technology, Tainan 710, Taiwan
6
New Materials R&D Department, China Steel Corporation, Kaoshiung 812, Taiwan
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(11), 1330; https://doi.org/10.3390/catal10111330
Received: 24 September 2020 / Revised: 9 November 2020 / Accepted: 11 November 2020 / Published: 16 November 2020
In this study, electrodes of titanium dioxide nanotube arrays (TNAs) were successfully synthesized by applying the anodic oxidation etching method, as well as the use of green synthetic technology to add reducing agents of tea or coffee to reduce metal palladium from palladium chloride. Synthesis of palladium modified TNAs (Pd/TNAs) was conducted by the microwave hydrothermal method after the metal palladium was reduced. In order to identify the surface structure, light absorption and elemental composition, TNAs and Pd/TNAs were characterized by X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Furthermore, to test the photocurrent density, electron resistance, and hydroxyl radicals by I-t plot, electrochemistry impedance spectroscopy (EIS), and electron paramagnetic resonance (EPR) were investigated. The photocurrent (4.0 mA/cm2) of Pd/TNAs-C (using coffee as the reducing agent) at +1.0 V (vs. Ag/AgCl) was higher than that of the pure TNAs (1.5 mA/cm2), illustrating that Pd/TNAs-C can effectively separate photogenerated electrons and holes. Pd/TNAs is a favorable material as a photoanode for the photoelectrochemical (PEC) removal of organic pollutants in wastewater. View Full-Text
Keywords: titanium dioxide nanotube arrays; photoelectrochemical system; palladium; green synthesis titanium dioxide nanotube arrays; photoelectrochemical system; palladium; green synthesis
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MDPI and ACS Style

Lin, Y.-C.; Chen, C.-H.; Chen, K.-S.; Peng, Y.-P.; Lin, Y.-C.; Huang, S.-W.; Huang, C.-E.; Lai, H.-W.; Li, H.-W. Green Synthesized Palladium Coated Titanium Nanotube Arrays for Simultaneous Azo-Dye Degradation and Hydrogen Production. Catalysts 2020, 10, 1330. https://doi.org/10.3390/catal10111330

AMA Style

Lin Y-C, Chen C-H, Chen K-S, Peng Y-P, Lin Y-C, Huang S-W, Huang C-E, Lai H-W, Li H-W. Green Synthesized Palladium Coated Titanium Nanotube Arrays for Simultaneous Azo-Dye Degradation and Hydrogen Production. Catalysts. 2020; 10(11):1330. https://doi.org/10.3390/catal10111330

Chicago/Turabian Style

Lin, Yuan-Chung, Chia-Hung Chen, Kang-Shin Chen, Yen-Ping Peng, Yung-Chang Lin, Shih-Wei Huang, Chien-Er Huang, Hsiao-Wu Lai, and Hsing-Wang Li. 2020. "Green Synthesized Palladium Coated Titanium Nanotube Arrays for Simultaneous Azo-Dye Degradation and Hydrogen Production" Catalysts 10, no. 11: 1330. https://doi.org/10.3390/catal10111330

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