Evaluating the hydrothermal synthesis of quasi-one-dimensional TiO2 nanomaterials for the photocatalysis of selected organic chemicals
| Autor: | Sathyanarayanan S. Veeravalli, Tao Peng, Jerald A. Lalman, Houssam Fakhouri, Farzaneh Arefi-Khonsari, Srimanta Ray, Jian Zhang |
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| Přispěvatelé: | Department of Civil Environmental Engineering, University of Windsor [Ca], Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Huazhong University of Science and Technology [Wuhan] (HUST), Department of Chemical Engineering, National Institute of Technology Agartala, University of Kansas [Kansas City] |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Organic chemicals Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Box-behnken design (BBD) Nanomaterials 0103 physical sciences TiO2 nanomaterials Photocatalysts Photocatalysis Hydrothermal synthesis [CHIM]Chemical Sciences Quasi one dimensional Statistical optimization [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics 0210 nano-technology |
| Zdroj: | Desalination and Water Treatment Desalination and Water Treatment, FHF, 2018, 123, pp.211-223. ⟨10.5004/dwt.2018.22689⟩ |
| ISSN: | 1944-3994 1944-3986 |
| DOI: | 10.5004/dwt.2018.22689⟩ |
| Popis: | International audience; Quasi-one-dimensional (Q1D) titanium dioxide (TiO2) nanomaterials have attracted attention inphotocatalytic applications because of their high oxidative potential coupled with increasing activesites. In this study, Q1D TiO2 samples with different phase structure, crystal size, and specific surfacearea were produced using a hydrothermal method by varying the reaction conditions (temperature,alkaline concentration, and the TiO2 precursor concentration). A three-factor three-level Box–Behnkendesign (BBD) with three replicates (15 conditions) at the center point was employed to evaluateand optimize the hydrothermal synthesis factors in terms of photocatalysis of rhodamine B (RhB),phenol, methyl orange, and methylene blue. The BBD demonstrated that the temperature and theNaOH concentration significantly affected the Q1D TiO2 crystal size, phase structure, bandgap, andphotocatalytic activity. A reduce temperature at 120°C and a low NaOH concentration at 5 M werefavorable in producing a biphasic anatase–rutile structure with optimum photocatalytic activity.Under a higher temperature of 190°C and with ≥ 10 M NaOH concentration, the presence of TiO2-Bphase resulted in the lowest photocatalytic activity. |
| Databáze: | OpenAIRE |
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