Enhancement of NOx photo-oxidation by Fe- and Cu-doped blue TiO2
The present work is focused on the removal of NOx with reduced blue TiO 2 with Fe (blue Fe-TiO 2 )- and Cu (blue Cu-TiO 2 )-doped photocatalyst. TiO 2 was reduced via lithium in EDA (blue TiO 2 ). Fe and Cu ions were doped in the reduced TiO 2 (blue Fe-TiO 2 and blue Cu-TiO 2 ). The material resulte...
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creator | Martinez-Oviedo, Adriana Ray, Schindra Kumar Joshi, Bhupendra Lee, Soo Wohn |
description | The present work is focused on the removal of NOx with reduced blue TiO
2
with Fe (blue Fe-TiO
2
)- and Cu (blue Cu-TiO
2
)-doped photocatalyst. TiO
2
was reduced via lithium in EDA (blue TiO
2
). Fe and Cu ions were doped in the reduced TiO
2
(blue Fe-TiO
2
and blue Cu-TiO
2
). The material resulted in a core-shell structure of amorphous and anatase phase. XPS suggests the existence of Ti
3+
species and oxygen vacancies within the structure of TiO
2
. Additionally, valence bond (VB)-XPS shows the generation of intermediate levels at the band edge of the doped photocatalyst. Photocurrent, electrochemical impedance spectroscopy and cyclic voltammetry confirmed the enhanced charge-separation process in doped reduced TiO
2
. The photocatalysts were tested for the photo-oxidation of NOx. Blue Fe-TiO
2
reveals the efficiency of 70% for NO elimination and 44.74% for NO
2
formation. The improved efficiency of the doped photocatalyst is related to the re-engineered structure with Ti
3+
species, oxygen vacancies, and charge traps. Electron spin resonance (ESR) measurement was carried out for blue Fe-TiO
2
to confirm the formation of reactive oxygen species (ROS). Furthermore, ion chromatography was used to investigate the mechanism of NOx oxidation. In conclusion, the doped blue TiO
2
has a strong tendency to photo-oxidize NOx gasses. |
doi_str_mv | 10.1007/s11356-020-09078-4 |
format | Article |
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2
with Fe (blue Fe-TiO
2
)- and Cu (blue Cu-TiO
2
)-doped photocatalyst. TiO
2
was reduced via lithium in EDA (blue TiO
2
). Fe and Cu ions were doped in the reduced TiO
2
(blue Fe-TiO
2
and blue Cu-TiO
2
). The material resulted in a core-shell structure of amorphous and anatase phase. XPS suggests the existence of Ti
3+
species and oxygen vacancies within the structure of TiO
2
. Additionally, valence bond (VB)-XPS shows the generation of intermediate levels at the band edge of the doped photocatalyst. Photocurrent, electrochemical impedance spectroscopy and cyclic voltammetry confirmed the enhanced charge-separation process in doped reduced TiO
2
. The photocatalysts were tested for the photo-oxidation of NOx. Blue Fe-TiO
2
reveals the efficiency of 70% for NO elimination and 44.74% for NO
2
formation. The improved efficiency of the doped photocatalyst is related to the re-engineered structure with Ti
3+
species, oxygen vacancies, and charge traps. Electron spin resonance (ESR) measurement was carried out for blue Fe-TiO
2
to confirm the formation of reactive oxygen species (ROS). Furthermore, ion chromatography was used to investigate the mechanism of NOx oxidation. In conclusion, the doped blue TiO
2
has a strong tendency to photo-oxidize NOx gasses.</description><identifier>ISSN: 0944-1344</identifier><identifier>EISSN: 1614-7499</identifier><identifier>DOI: 10.1007/s11356-020-09078-4</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Amorphous materials ; Anatase ; Aquatic Pollution ; Atmospheric Protection/Air Quality Control/Air Pollution ; Core-shell structure ; Earth and Environmental Science ; Ecotoxicology ; Electrochemical impedance spectroscopy ; Electrochemistry ; Electron paramagnetic resonance ; Electron spin ; Electron spin resonance ; Electrons ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental science ; Lithium ; Nitrogen dioxide ; Oxidation ; Oxygen ; Photocatalysts ; Photoelectric effect ; Photoelectric emission ; Photooxidation ; Reactive oxygen species ; Research Article ; Spectroscopy ; Spin resonance ; Titanium dioxide ; Vacancies ; Waste Water Technology ; Water Management ; Water Pollution Control</subject><ispartof>Environmental science and pollution research international, 2020-07, Vol.27 (21), p.26702-26713</ispartof><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020</rights><rights>Springer-Verlag GmbH Germany, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c389t-e28b317ea2e20e67ff51d30a349663b27ad5d0543b36caae4c2a7224110fa9f23</citedby><cites>FETCH-LOGICAL-c389t-e28b317ea2e20e67ff51d30a349663b27ad5d0543b36caae4c2a7224110fa9f23</cites><orcidid>0000-0002-9582-8956</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11356-020-09078-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11356-020-09078-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Martinez-Oviedo, Adriana</creatorcontrib><creatorcontrib>Ray, Schindra Kumar</creatorcontrib><creatorcontrib>Joshi, Bhupendra</creatorcontrib><creatorcontrib>Lee, Soo Wohn</creatorcontrib><title>Enhancement of NOx photo-oxidation by Fe- and Cu-doped blue TiO2</title><title>Environmental science and pollution research international</title><addtitle>Environ Sci Pollut Res</addtitle><description>The present work is focused on the removal of NOx with reduced blue TiO
2
with Fe (blue Fe-TiO
2
)- and Cu (blue Cu-TiO
2
)-doped photocatalyst. TiO
2
was reduced via lithium in EDA (blue TiO
2
). Fe and Cu ions were doped in the reduced TiO
2
(blue Fe-TiO
2
and blue Cu-TiO
2
). The material resulted in a core-shell structure of amorphous and anatase phase. XPS suggests the existence of Ti
3+
species and oxygen vacancies within the structure of TiO
2
. Additionally, valence bond (VB)-XPS shows the generation of intermediate levels at the band edge of the doped photocatalyst. Photocurrent, electrochemical impedance spectroscopy and cyclic voltammetry confirmed the enhanced charge-separation process in doped reduced TiO
2
. The photocatalysts were tested for the photo-oxidation of NOx. Blue Fe-TiO
2
reveals the efficiency of 70% for NO elimination and 44.74% for NO
2
formation. The improved efficiency of the doped photocatalyst is related to the re-engineered structure with Ti
3+
species, oxygen vacancies, and charge traps. Electron spin resonance (ESR) measurement was carried out for blue Fe-TiO
2
to confirm the formation of reactive oxygen species (ROS). Furthermore, ion chromatography was used to investigate the mechanism of NOx oxidation. In conclusion, the doped blue TiO
2
has a strong tendency to photo-oxidize NOx gasses.</description><subject>Amorphous materials</subject><subject>Anatase</subject><subject>Aquatic Pollution</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Core-shell structure</subject><subject>Earth and Environmental Science</subject><subject>Ecotoxicology</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Electrochemistry</subject><subject>Electron paramagnetic resonance</subject><subject>Electron spin</subject><subject>Electron spin resonance</subject><subject>Electrons</subject><subject>Environment</subject><subject>Environmental Chemistry</subject><subject>Environmental Health</subject><subject>Environmental science</subject><subject>Lithium</subject><subject>Nitrogen dioxide</subject><subject>Oxidation</subject><subject>Oxygen</subject><subject>Photocatalysts</subject><subject>Photoelectric effect</subject><subject>Photoelectric emission</subject><subject>Photooxidation</subject><subject>Reactive oxygen species</subject><subject>Research Article</subject><subject>Spectroscopy</subject><subject>Spin resonance</subject><subject>Titanium dioxide</subject><subject>Vacancies</subject><subject>Waste Water Technology</subject><subject>Water Management</subject><subject>Water Pollution 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international</jtitle><stitle>Environ Sci Pollut Res</stitle><date>2020-07-01</date><risdate>2020</risdate><volume>27</volume><issue>21</issue><spage>26702</spage><epage>26713</epage><pages>26702-26713</pages><issn>0944-1344</issn><eissn>1614-7499</eissn><abstract>The present work is focused on the removal of NOx with reduced blue TiO
2
with Fe (blue Fe-TiO
2
)- and Cu (blue Cu-TiO
2
)-doped photocatalyst. TiO
2
was reduced via lithium in EDA (blue TiO
2
). Fe and Cu ions were doped in the reduced TiO
2
(blue Fe-TiO
2
and blue Cu-TiO
2
). The material resulted in a core-shell structure of amorphous and anatase phase. XPS suggests the existence of Ti
3+
species and oxygen vacancies within the structure of TiO
2
. Additionally, valence bond (VB)-XPS shows the generation of intermediate levels at the band edge of the doped photocatalyst. Photocurrent, electrochemical impedance spectroscopy and cyclic voltammetry confirmed the enhanced charge-separation process in doped reduced TiO
2
. The photocatalysts were tested for the photo-oxidation of NOx. Blue Fe-TiO
2
reveals the efficiency of 70% for NO elimination and 44.74% for NO
2
formation. The improved efficiency of the doped photocatalyst is related to the re-engineered structure with Ti
3+
species, oxygen vacancies, and charge traps. Electron spin resonance (ESR) measurement was carried out for blue Fe-TiO
2
to confirm the formation of reactive oxygen species (ROS). Furthermore, ion chromatography was used to investigate the mechanism of NOx oxidation. In conclusion, the doped blue TiO
2
has a strong tendency to photo-oxidize NOx gasses.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s11356-020-09078-4</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-9582-8956</orcidid></addata></record> |
fulltext | fulltext |
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language | eng |
recordid | cdi_proquest_miscellaneous_2399835453 |
source | Springer Nature - Complete Springer Journals |
subjects | Amorphous materials Anatase Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Core-shell structure Earth and Environmental Science Ecotoxicology Electrochemical impedance spectroscopy Electrochemistry Electron paramagnetic resonance Electron spin Electron spin resonance Electrons Environment Environmental Chemistry Environmental Health Environmental science Lithium Nitrogen dioxide Oxidation Oxygen Photocatalysts Photoelectric effect Photoelectric emission Photooxidation Reactive oxygen species Research Article Spectroscopy Spin resonance Titanium dioxide Vacancies Waste Water Technology Water Management Water Pollution Control |
title | Enhancement of NOx photo-oxidation by Fe- and Cu-doped blue TiO2 |
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