Unraveling doping induced anatase–rutile phase transition in TiO2 using electron, X-ray and gamma-ray as spectroscopic probes
The present work reports the microscopic details of anatase (A) to rutile (R) phase transformation in a Mn-doped TiO2 system. Titanium dioxide (TiO2) powder was synthesized at three different dopant percentages, namely 1, 5, and 10 atom% of Mn, by a coprecipitation technique. Time differential pertu...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2018, Vol.20 (45), p.28699-28711 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | Banerjee, D Gupta, Santosh K Patra, N Raja, Sk Wasim Pathak, N Bhattacharyya, D Pujari, P K Thakare, S V Jha, S N |
| description | The present work reports the microscopic details of anatase (A) to rutile (R) phase transformation in a Mn-doped TiO2 system. Titanium dioxide (TiO2) powder was synthesized at three different dopant percentages, namely 1, 5, and 10 atom% of Mn, by a coprecipitation technique. Time differential perturbed angular correlation (TDPAC) spectroscopy was used to identify the formation of the rutile-like phase (R*) during the phase-transition process and revealed interface nucleation to be promoted by the Mn dopant. Electron paramagnetic resonance (EPR) spectroscopy, synchrotron-based X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) studies showed that Mn exhibited a mixed valence states of 2+ and 4+ at different stages of the annealing process. The rutile onset temperature gradually decreased with the increase in the Mn content. The present report proposes the mechanism for the phase transformation and details the effect of Mn on the A to R phase-transformation process. This can assist in gaining a fundamental understanding of the A to R phase-transformation process and the role of the dopant in stabilizing one phase over the other. |
| doi_str_mv | 10.1039/c8cp04310h |
| format | Article |
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Titanium dioxide (TiO2) powder was synthesized at three different dopant percentages, namely 1, 5, and 10 atom% of Mn, by a coprecipitation technique. Time differential perturbed angular correlation (TDPAC) spectroscopy was used to identify the formation of the rutile-like phase (R*) during the phase-transition process and revealed interface nucleation to be promoted by the Mn dopant. Electron paramagnetic resonance (EPR) spectroscopy, synchrotron-based X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) studies showed that Mn exhibited a mixed valence states of 2+ and 4+ at different stages of the annealing process. The rutile onset temperature gradually decreased with the increase in the Mn content. The present report proposes the mechanism for the phase transformation and details the effect of Mn on the A to R phase-transformation process. This can assist in gaining a fundamental understanding of the A to R phase-transformation process and the role of the dopant in stabilizing one phase over the other.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/c8cp04310h</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Anatase ; Angular correlation ; Dopants ; Electron paramagnetic resonance ; Fine structure ; Gamma rays ; Manganese ; Nucleation ; Phase transitions ; Rutile ; Spectrum analysis ; Titanium dioxide ; X ray absorption ; X ray spectra</subject><ispartof>Physical chemistry chemical physics : PCCP, 2018, Vol.20 (45), p.28699-28711</ispartof><rights>Copyright Royal Society of Chemistry 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,4010,27900,27901,27902</link.rule.ids></links><search><creatorcontrib>Banerjee, D</creatorcontrib><creatorcontrib>Gupta, Santosh K</creatorcontrib><creatorcontrib>Patra, N</creatorcontrib><creatorcontrib>Raja, Sk Wasim</creatorcontrib><creatorcontrib>Pathak, N</creatorcontrib><creatorcontrib>Bhattacharyya, D</creatorcontrib><creatorcontrib>Pujari, P K</creatorcontrib><creatorcontrib>Thakare, S V</creatorcontrib><creatorcontrib>Jha, S N</creatorcontrib><title>Unraveling doping induced anatase–rutile phase transition in TiO2 using electron, X-ray and gamma-ray as spectroscopic probes</title><title>Physical chemistry chemical physics : PCCP</title><description>The present work reports the microscopic details of anatase (A) to rutile (R) phase transformation in a Mn-doped TiO2 system. Titanium dioxide (TiO2) powder was synthesized at three different dopant percentages, namely 1, 5, and 10 atom% of Mn, by a coprecipitation technique. Time differential perturbed angular correlation (TDPAC) spectroscopy was used to identify the formation of the rutile-like phase (R*) during the phase-transition process and revealed interface nucleation to be promoted by the Mn dopant. Electron paramagnetic resonance (EPR) spectroscopy, synchrotron-based X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) studies showed that Mn exhibited a mixed valence states of 2+ and 4+ at different stages of the annealing process. The rutile onset temperature gradually decreased with the increase in the Mn content. The present report proposes the mechanism for the phase transformation and details the effect of Mn on the A to R phase-transformation process. This can assist in gaining a fundamental understanding of the A to R phase-transformation process and the role of the dopant in stabilizing one phase over the other.</description><subject>Anatase</subject><subject>Angular correlation</subject><subject>Dopants</subject><subject>Electron paramagnetic resonance</subject><subject>Fine structure</subject><subject>Gamma rays</subject><subject>Manganese</subject><subject>Nucleation</subject><subject>Phase transitions</subject><subject>Rutile</subject><subject>Spectrum analysis</subject><subject>Titanium dioxide</subject><subject>X ray absorption</subject><subject>X ray spectra</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNpdjk1OwzAQhS0EEqWw4QSW2LAg4LETJ16iij-pUjetxK5ybKd1lTrBdpBYwR24ISfBpYgFq5n39L15g9A5kGsgTNyoSvUkZ0DWB2gEOWeZIFV--LeX_BidhLAhhEABbITeF87LV9Nat8K663fDOj0oo7F0Mspgvj4-_RBta3C_ThJHL12w0XYukXhuZxQPYZczrVHRd-4KP2devqW8xiu53cq9Cjj0P0BQqUfh3ne1CafoqJFtMGe_c4wW93fzyWM2nT08TW6nWU-Bx0wLo0VBtNJQlgUByJtclUBJzaWquEyGKI3gOaVcNDWrGXCW_EI3opE1sDG63N9NtS-DCXG5tUGZtpXOdENYUmCUVsBpmdCLf-imG7xL3-0oTllBObBvruVwXQ</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Banerjee, D</creator><creator>Gupta, Santosh K</creator><creator>Patra, N</creator><creator>Raja, Sk Wasim</creator><creator>Pathak, N</creator><creator>Bhattacharyya, D</creator><creator>Pujari, P K</creator><creator>Thakare, S V</creator><creator>Jha, S N</creator><general>Royal Society of Chemistry</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>2018</creationdate><title>Unraveling doping induced anatase–rutile phase transition in TiO2 using electron, X-ray and gamma-ray as spectroscopic probes</title><author>Banerjee, D ; Gupta, Santosh K ; Patra, N ; Raja, Sk Wasim ; Pathak, N ; Bhattacharyya, D ; Pujari, P K ; Thakare, S V ; Jha, S N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p216t-d9ed950dcd17750114f4c7120b6ac86a11497e9642269fb3b316386a5df9fab13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Anatase</topic><topic>Angular correlation</topic><topic>Dopants</topic><topic>Electron paramagnetic resonance</topic><topic>Fine structure</topic><topic>Gamma rays</topic><topic>Manganese</topic><topic>Nucleation</topic><topic>Phase transitions</topic><topic>Rutile</topic><topic>Spectrum analysis</topic><topic>Titanium dioxide</topic><topic>X ray absorption</topic><topic>X ray spectra</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Banerjee, D</creatorcontrib><creatorcontrib>Gupta, Santosh K</creatorcontrib><creatorcontrib>Patra, N</creatorcontrib><creatorcontrib>Raja, Sk Wasim</creatorcontrib><creatorcontrib>Pathak, N</creatorcontrib><creatorcontrib>Bhattacharyya, D</creatorcontrib><creatorcontrib>Pujari, P K</creatorcontrib><creatorcontrib>Thakare, S V</creatorcontrib><creatorcontrib>Jha, S N</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Banerjee, D</au><au>Gupta, Santosh K</au><au>Patra, N</au><au>Raja, Sk Wasim</au><au>Pathak, N</au><au>Bhattacharyya, D</au><au>Pujari, P K</au><au>Thakare, S V</au><au>Jha, S N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Unraveling doping induced anatase–rutile phase transition in TiO2 using electron, X-ray and gamma-ray as spectroscopic probes</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><date>2018</date><risdate>2018</risdate><volume>20</volume><issue>45</issue><spage>28699</spage><epage>28711</epage><pages>28699-28711</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>The present work reports the microscopic details of anatase (A) to rutile (R) phase transformation in a Mn-doped TiO2 system. Titanium dioxide (TiO2) powder was synthesized at three different dopant percentages, namely 1, 5, and 10 atom% of Mn, by a coprecipitation technique. Time differential perturbed angular correlation (TDPAC) spectroscopy was used to identify the formation of the rutile-like phase (R*) during the phase-transition process and revealed interface nucleation to be promoted by the Mn dopant. Electron paramagnetic resonance (EPR) spectroscopy, synchrotron-based X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) studies showed that Mn exhibited a mixed valence states of 2+ and 4+ at different stages of the annealing process. The rutile onset temperature gradually decreased with the increase in the Mn content. The present report proposes the mechanism for the phase transformation and details the effect of Mn on the A to R phase-transformation process. This can assist in gaining a fundamental understanding of the A to R phase-transformation process and the role of the dopant in stabilizing one phase over the other.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/c8cp04310h</doi><tpages>13</tpages></addata></record> |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Anatase Angular correlation Dopants Electron paramagnetic resonance Fine structure Gamma rays Manganese Nucleation Phase transitions Rutile Spectrum analysis Titanium dioxide X ray absorption X ray spectra |
| title | Unraveling doping induced anatase–rutile phase transition in TiO2 using electron, X-ray and gamma-ray as spectroscopic probes |
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