Scrolled titanate nanosheet composites with reduced graphite oxide for photocatalytic and adsorptive removal of toxic vapors
- Title
- Scrolled titanate nanosheet composites with reduced graphite oxide for photocatalytic and adsorptive removal of toxic vapors
- Author
- 김기현
- Keywords
- CEES; Detoxification of chemical warfare agents; Graphite oxide composites; Mustard gas; Scrolled titania nanosheets; Titania nanotubes photocatalyst
- Issue Date
- 2021-07
- Publisher
- Elsevier B.V.
- Citation
- Chemical Engineering Journal, v. 415, article no. 128907, Page. 1-12
- Abstract
- Nanocomposites (TiO-NTbs/rGO) consisting of titanate nanosheets (H2Ti3O7) scrolled to nanotubes (TiO-NTbs) and deposited on reduced graphite oxide (rGO) were synthesized through the combination of low-power/low-frequency (37 kHz) ultrasound and hydrothermal treatment procedures. The materials were characterized by X-ray diffraction, high-resolution transmission electron microscopy, N2 physisorption, thermal analysis (in air or helium), potentiometric titration, X-ray photoelectron spectroscopy, and diffuse reflectance spectroscopy. The addition of 4% rGO led to an optimal surface area of the composite (359 m2/g). The materials, when tested as media to remove toxic vapors of a chemical warfare agent (mustard gas) surrogate either under dark or visible light conditions, exhibited an adsorption capacity greater than 600 mg/g, which i was higher than those of other well-preforming materials (e.g., barium titanate nanoparticles or metal?organic frameworks). The photocatalytic activity of TiO-NTbs was also superior to that of P25 or other well-known nanomaterials. On their surface, various compounds of low- or non-toxicity were identified to be formed photochemically via free radical reactions. ? 2021 Elsevier B.V.
- URI
- https://www.sciencedirect.com/science/article/pii/S1385894721005015?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/176730
- ISSN
- 1385-8947;1873-3212
- DOI
- 10.1016/j.cej.2021.128907
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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