Toward enhancement of TiO2 surface defect sites related to photocatalytic activity via facile nitrogen doping strategy |
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| Affiliation: | 1. Department of Chemistry, Molecular-Level Interfaces Research Center, KAIST, Daejeon 305-701, Republic of Korea;2. Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang 790-784, Republic of Korea;3. Department of Chemistry, Pukyong National University, Busan 48153, Republic of Korea;4. Department of Chemistry, Sookmyung Women''s University, Seoul 140-742, Republic of Korea;1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi''an, Shaanxi 710021, China;2. Shaanxi Research Design Institute of Petroleum and Chemical Industry, Xi''an, Shaanxi 710021, China |
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| Abstract: | This study examined the catalytic activities of three distinct N–Pd@TiO2 nanoparticles, post-annealed (at 700, 800, and 900 °C) after fabrication on silicon substrates. Systematically, HRPES and SPEM indicated that nitrogen was predominantly doped around PdO nanostructure. Particularly, we prove that photocatalytic activity in effective nitrogen doped surface area is far higher than in undoped area of Pd@TiO2 nanoparticles by measuring for oxidation reaction of benzenethiol, thioacetic acid, and thiobenzoic acid. Besides to the band gap narrowing, nitrogen doping leads to generate Ti3 + species or oxygen vacancies site of the surface, which leads to enhance the activity of surface photocatalysis. |
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