Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation
Abstract
The generation of structural defects in metal oxide catalysts offers a potential pathway to improve performance. Herein, we investigated the effect of thermal hydrogenation and low-temperature plasma treatments on mixed SiO2/TiO2 materials. Hydrogenation at 500 °C resulted in the reduction of the material to produce Ti3+ in the bulk TiO2. In contrast, low temperature plasma treatment for 10 or 20 min generated surface Ti3+ species via the removal of oxygen on both the neat and hydrogenated material. Assessing the photocatalytic activity of the materials demonstrated a 40–130% increase in the rate of formic acid oxidation after plasma treatment. A strong relationship between the Ti3+ content and catalyst activity was established, although a change in the Si–Ti interaction after plasma treating of the neat SiO2/TiO2 material was found to limit performance, and suggests that performance is not determined solely by the presence of Ti3+.
- Authors:
-
- Univ. of New South Wales, Sydney, NSW (Australia)
- Southeast Univ., Nanjing (China)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Australian Research Council
- OSTI Identifier:
- 1601864
- Grant/Contract Number:
- AC02-06CH11357; FL140100081
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 17; Journal ID: ISSN 1996-1944
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 36 MATERIALS SCIENCE; silica-titania photocatalysts; defect generation; plasma pre-treatment; oxygen activation
Citation Formats
Horlyck, Jonathan, Nashira, Alimatun, Lovell, Emma, Daiyan, Rahman, Bedford, Nicholas, Wei, Yuexing, Amal, Rose, and Scott, Jason. Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation. United States: N. p., 2019.
Web. doi:10.3390/ma12172756.
Horlyck, Jonathan, Nashira, Alimatun, Lovell, Emma, Daiyan, Rahman, Bedford, Nicholas, Wei, Yuexing, Amal, Rose, & Scott, Jason. Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation. United States. https://doi.org/10.3390/ma12172756
Horlyck, Jonathan, Nashira, Alimatun, Lovell, Emma, Daiyan, Rahman, Bedford, Nicholas, Wei, Yuexing, Amal, Rose, and Scott, Jason. Tue .
"Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation". United States. https://doi.org/10.3390/ma12172756. https://www.osti.gov/servlets/purl/1601864.
@article{osti_1601864,
title = {Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation},
author = {Horlyck, Jonathan and Nashira, Alimatun and Lovell, Emma and Daiyan, Rahman and Bedford, Nicholas and Wei, Yuexing and Amal, Rose and Scott, Jason},
abstractNote = {The generation of structural defects in metal oxide catalysts offers a potential pathway to improve performance. Herein, we investigated the effect of thermal hydrogenation and low-temperature plasma treatments on mixed SiO2/TiO2 materials. Hydrogenation at 500 °C resulted in the reduction of the material to produce Ti3+ in the bulk TiO2. In contrast, low temperature plasma treatment for 10 or 20 min generated surface Ti3+ species via the removal of oxygen on both the neat and hydrogenated material. Assessing the photocatalytic activity of the materials demonstrated a 40–130% increase in the rate of formic acid oxidation after plasma treatment. A strong relationship between the Ti3+ content and catalyst activity was established, although a change in the Si–Ti interaction after plasma treating of the neat SiO2/TiO2 material was found to limit performance, and suggests that performance is not determined solely by the presence of Ti3+.},
doi = {10.3390/ma12172756},
journal = {Materials},
number = 17,
volume = 12,
place = {United States},
year = {Tue Aug 27 00:00:00 EDT 2019},
month = {Tue Aug 27 00:00:00 EDT 2019}
}
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Highly Efficient Low-Temperature Plasma-Assisted Modification of TiO 2 Nanosheets with Exposed {001} Facets for Enhanced Visible-Light Photocatalytic Activity
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Raman spectrum of anatase, TiO2
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Manipulating ceria-titania binary oxide features and their impact as nickel catalyst supports for low temperature steam reforming of methane
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- Applied Catalysis A: General, Vol. 530
Flame spray pyrolysis-designed silica/ceria-zirconia supports for the carbon dioxide reforming of methane
journal, September 2017
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Photocatalytic hydrogen production over flame spray pyrolysis-synthesised TiO2 and Au/TiO2
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Passivation of defect states in anatase TiO2 hollow spheres with Mg doping: Realizing efficient photocatalytic overall water splitting
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journal, April 2015
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Plasma Catalysis: Synergistic Effects at the Nanoscale
journal, November 2015
- Neyts, Erik C.; Ostrikov, Kostya (Ken); Sunkara, Mahendra K.
- Chemical Reviews, Vol. 115, Issue 24
Hydrogenated Blue Titania for Efficient Solar to Chemical Conversions: Preparation, Characterization, and Reaction Mechanism of CO 2 Reduction
journal, January 2018
- Yin, Guoheng; Huang, Xieyi; Chen, Tianyuan
- ACS Catalysis, Vol. 8, Issue 2
Light-Induced Synergistic Multidefect Sites on TiO 2 /SiO 2 Composites for Catalytic Dehydrogenation
journal, February 2019
- Saputera, Wibawa Hendra; Tahini, Hassan A.; Sabsabi, Mohammad
- ACS Catalysis, Vol. 9, Issue 3
Gas Adsorption Characterization of Ordered Organic−Inorganic Nanocomposite Materials
journal, October 2001
- Kruk, Michal; Jaroniec, Mietek
- Chemistry of Materials, Vol. 13, Issue 10
Total Oxidation of Formaldehyde over MnO x -CeO 2 Catalysts: The Effect of Acid Treatment
journal, March 2015
- Quiroz, Jhon; Giraudon, Jean-Marc; Gervasini, Antonella
- ACS Catalysis, Vol. 5, Issue 4
Effect of Oxygen Defects on the Catalytic Performance of VO x /CeO 2 Catalysts for Oxidative Dehydrogenation of Methanol
journal, March 2015
- Li, Yan; Wei, Zhehao; Gao, Feng
- ACS Catalysis, Vol. 5, Issue 5
EPR observation of trapped electrons in colloidal titanium dioxide
journal, October 1985
- Howe, Russell F.; Gratzel, Michael
- The Journal of Physical Chemistry, Vol. 89, Issue 21
Effects of common inorganic anions on rates of photocatalytic oxidation of organic carbon over illuminated titanium dioxide
journal, August 1990
- Abdullah, Mohammad.; Low, Gary K. C.; Matthews, Ralph W.
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Spectroscopic Studies of Pristine and Fluorinated Nano-ZrO 2 in Photostimulated Heterogeneous Processes
journal, February 2009
- Emeline, Alexei V.; Sheremetyeva, Natalia V.; Khomchenko, Natalia V.
- The Journal of Physical Chemistry C, Vol. 113, Issue 11
Photocatalytic Degradation of RhB over TiO 2 Bilayer Films: Effect of Defects and Their Location
journal, June 2010
- Zhuang, Jiandong; Dai, Wenxin; Tian, Qinfen
- Langmuir, Vol. 26, Issue 12
Defect Engineering in Cubic Cerium Oxide Nanostructures for Catalytic Oxidation
journal, July 2011
- Lawrence, Neil J.; Brewer, Joseph R.; Wang, Lu
- Nano Letters, Vol. 11, Issue 7
Band alignment of rutile and anatase TiO2
journal, July 2013
- Scanlon, David O.; Dunnill, Charles W.; Buckeridge, John
- Nature Materials, Vol. 12, Issue 9