Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts
Abstract
A series of novel, mesoporous transition metal doped titanium dioxide-reduced graphene oxide composites are synthesized where the dopants were Mn, Co, Ni, Mo, and W. An in-situ synthesis method was used which involves a green, economic, hydrothermal process which can be scaled up easily. The composites show high surface areas (165–245 m2/g) and monomodal pore size distributions with average pore diameters in the range of 3–5 nm. The homogeneous distributions of the dopants are seen in SEM-EDX mapping data. The indirect band gaps of the composite materials are in the range of 2.20–2.48 eV. The composites show excellent dye adsorption activities where 100% adsorption of Rhodamine B occurs within 5 min when Mo–TiO2/rGO composite is used. Furthermore, the adsorbed dye can either be desorbed or photocatalytically degraded and the composite is reusable up to 10 cycles without losing significant activity. Mo–TiO2/rGO composite showed excellent adsorption of both cationic and anionic dyes at neutral pH.
- Authors:
-
- Univ. of Connecticut, Storrs, CT (United States)
- Publication Date:
- Research Org.:
- Univ. of Connecticut, Storrs, CT (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE
- OSTI Identifier:
- 1776358
- Alternate Identifier(s):
- OSTI ID: 1644709; OSTI ID: 1838002
- Grant/Contract Number:
- FG02-86ER13622
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Microporous and Mesoporous Materials
- Additional Journal Information:
- Journal Volume: 307; Journal ID: ISSN 1387-1811
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Reduced graphene oxide; Composites; Transition metal oxide dopants; Dye adsorption; Photocatalysis
Citation Formats
Thalgaspitiya, Wimalika R. K., Kapuge, Tharindu Kankanam, He, Junkai, Deljoo, Bahareh, Meguerdichian, Andrew G., Aindow, Mark, and Suib, Steven L. Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts. United States: N. p., 2020.
Web. doi:10.1016/j.micromeso.2020.110521.
Thalgaspitiya, Wimalika R. K., Kapuge, Tharindu Kankanam, He, Junkai, Deljoo, Bahareh, Meguerdichian, Andrew G., Aindow, Mark, & Suib, Steven L. Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts. United States. https://doi.org/10.1016/j.micromeso.2020.110521
Thalgaspitiya, Wimalika R. K., Kapuge, Tharindu Kankanam, He, Junkai, Deljoo, Bahareh, Meguerdichian, Andrew G., Aindow, Mark, and Suib, Steven L. Fri .
"Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts". United States. https://doi.org/10.1016/j.micromeso.2020.110521. https://www.osti.gov/servlets/purl/1776358.
@article{osti_1776358,
title = {Multifunctional transition metal doped titanium dioxide reduced graphene oxide composites as highly efficient adsorbents and photocatalysts},
author = {Thalgaspitiya, Wimalika R. K. and Kapuge, Tharindu Kankanam and He, Junkai and Deljoo, Bahareh and Meguerdichian, Andrew G. and Aindow, Mark and Suib, Steven L.},
abstractNote = {A series of novel, mesoporous transition metal doped titanium dioxide-reduced graphene oxide composites are synthesized where the dopants were Mn, Co, Ni, Mo, and W. An in-situ synthesis method was used which involves a green, economic, hydrothermal process which can be scaled up easily. The composites show high surface areas (165–245 m2/g) and monomodal pore size distributions with average pore diameters in the range of 3–5 nm. The homogeneous distributions of the dopants are seen in SEM-EDX mapping data. The indirect band gaps of the composite materials are in the range of 2.20–2.48 eV. The composites show excellent dye adsorption activities where 100% adsorption of Rhodamine B occurs within 5 min when Mo–TiO2/rGO composite is used. Furthermore, the adsorbed dye can either be desorbed or photocatalytically degraded and the composite is reusable up to 10 cycles without losing significant activity. Mo–TiO2/rGO composite showed excellent adsorption of both cationic and anionic dyes at neutral pH.},
doi = {10.1016/j.micromeso.2020.110521},
journal = {Microporous and Mesoporous Materials},
number = ,
volume = 307,
place = {United States},
year = {Fri Jul 24 00:00:00 EDT 2020},
month = {Fri Jul 24 00:00:00 EDT 2020}
}
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