Construction of NiO/H 2 Ti 3 O 7 nanotube composite and its photocatalytic conversion feature for ethyl mercaptan
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Construction of NiO/H2Ti3O7 nanotube composite and its photocatalytic conversion feature for ethyl mercaptan Wei Zhang1 · Jichao Zhu2 · Jie He1 · Lei Xu1 · Lifang Hu1 Received: 6 May 2020 / Accepted: 16 July 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Ethyl mercaptan is a typical stinking organic sulfide, which is harmful to the human and ecological environment. Ethyl mercaptan in chemical raw materials is also toxic to catalysts. Therefore, it must be removed before use. In the present study, NiO/H2Ti3O7 nanotube (NiO/H2Ti3O7-NT) composite was used to adsorption and decomposition of ethyl mercaptan. The NiO/H2Ti3O7-NT composite was synthesized by a facile hydrothermal synthesis and one-step calcination method. The as-prepared NiO/H2Ti3O7-NT and its precursors were characterized by powder X-ray diffraction (XRD), transmission electron-microscopy (TEM), laser Raman spectroscopy (LRS), N 2 adsorption–desorption measurement and UV–Vis diffuse reflection spectroscopy (UV–Vis DRS). Adsorption and photocatalytic oxidization performance for ethyl mercaptan were evaluated under dynamic condition. The results show that the spectral response characteristics of the as-prepared composite are changed significantly, responsiveness ability of visible light is a marked improvement. There is an obvious interaction between host H 2Ti3O7-NT and gust NiO particles. The photocatalytic reaction results show that the as-prepared composite has a photo-degradation activity for oxidation of ethyl mercaptan under simulated sunlight irradiation. A possible photocatalytic mechanism was discussed. Keywords NiO/H2ti3O7-NT composite · Nanotube · Ethyl mercaptan · Photocatalytic oxidation
1 Introduction Under the background of sustainable development all over the world, exploiting and utilizing natural resources, protecting the environment is the goal of our technological development. The fossil fuels will remain the dominant energy source in the world economy for a long time in the future. Sulfides often exist as the pollutants in fossil fuels. They are not only highly corrosive for instruments, but also serious harmful for personal safety. Therefore, it is an urgent task to move them from the fuels before using them. In recent years, lots of works on how to move the sulfides from fuel have be developed. These methods * Jie He [email protected] 1
School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, People’s Republic of China
School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, People’s Republic of China
2
include hydrodesulfurization [1, 2], adsorption desulfurization [3], and oxidative desulfurization [4, 5], etc. Among them, the technology of oxidative desulfurization especially photocatalytic oxidative desulfurization has attracted more and more attention. Photocatalytic oxidative desulfurization has inherent advantages compared with other methods, such as moderate operating conditions, low energy consumption and high c
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