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ZnPc/TiO2 composites for photocathodic protection of 304 stainless steel
ZnPc/TiO2 composites were synthesized by a drop-coating method and used as photoanodes for photocathodic protection to slow the corrosion of 304 stainless steel (304SS). TiO2 is a wide-band-gap (3.2 eV) conductor that only absorbs UV light with a wavelength
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| Published in: | Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2020-02, Vol.858, p.113802, Article 113802 |
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| Main Authors: | , , , , , , , |
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| cites | cdi_FETCH-LOGICAL-c340t-80ee4330b07133bb4af29eab8e61e9624510614a1f3afa53cf6a1d8f2eeec3af3 |
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| container_start_page | 113802 |
| container_title | Journal of electroanalytical chemistry (Lausanne, Switzerland) |
| container_volume | 858 |
| creator | Ning, Xiao-bo Wang, Xiu-tong Shao, Qian Ge, Sheng-song Chi, Li-feng Nan, You-bo Liang, Hao Hou, Bao-rong |
| description | ZnPc/TiO2 composites were synthesized by a drop-coating method and used as photoanodes for photocathodic protection to slow the corrosion of 304 stainless steel (304SS). TiO2 is a wide-band-gap (3.2 eV) conductor that only absorbs UV light with a wavelength |
| doi_str_mv | 10.1016/j.jelechem.2019.113802 |
| format | article |
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•ZnPc/TiO2 composites were synthesized by a simple drop-coating method.•ZnPc/TiO2 composites exhibited substantially greater visible-light absorption.•modest ZnPc improve photocathodic protection performance of 304SS.</description><identifier>ISSN: 1572-6657</identifier><identifier>EISSN: 1873-2569</identifier><identifier>DOI: 10.1016/j.jelechem.2019.113802</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>304 stainless steel ; Austenitic stainless steels ; Circuits ; Composite materials ; Conduction bands ; Conductors ; Corrosion prevention ; Corrosion rate ; Electromagnetic absorption ; Electrons ; Molecular orbitals ; Photocathodic protection ; Stainless steel ; TiO2 ; Titanium dioxide ; Ultraviolet radiation ; ZnPc/TiO2</subject><ispartof>Journal of electroanalytical chemistry (Lausanne, Switzerland), 2020-02, Vol.858, p.113802, Article 113802</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. Feb 1, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c340t-80ee4330b07133bb4af29eab8e61e9624510614a1f3afa53cf6a1d8f2eeec3af3</citedby><cites>FETCH-LOGICAL-c340t-80ee4330b07133bb4af29eab8e61e9624510614a1f3afa53cf6a1d8f2eeec3af3</cites><orcidid>0000-0001-8389-2080</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27926,27927</link.rule.ids></links><search><creatorcontrib>Ning, Xiao-bo</creatorcontrib><creatorcontrib>Wang, Xiu-tong</creatorcontrib><creatorcontrib>Shao, Qian</creatorcontrib><creatorcontrib>Ge, Sheng-song</creatorcontrib><creatorcontrib>Chi, Li-feng</creatorcontrib><creatorcontrib>Nan, You-bo</creatorcontrib><creatorcontrib>Liang, Hao</creatorcontrib><creatorcontrib>Hou, Bao-rong</creatorcontrib><title>ZnPc/TiO2 composites for photocathodic protection of 304 stainless steel</title><title>Journal of electroanalytical chemistry (Lausanne, Switzerland)</title><description>ZnPc/TiO2 composites were synthesized by a drop-coating method and used as photoanodes for photocathodic protection to slow the corrosion of 304 stainless steel (304SS). TiO2 is a wide-band-gap (3.2 eV) conductor that only absorbs UV light with a wavelength <380 nm, and the recombination rate of photogenerated carriers in TiO2 is high. Zinc phthalocyanine (ZnPc) is a material with strong visible-light absorption. The combination of ZnPc and TiO2 can increase the absorption of visible light. Furthermore, the lowest unoccupied molecular orbital (LUMO) conduction-band level of ZnPc is higher than that of TiO2; thus, the electrons in ZnPc excited by the light can migrate to the conduction band of TiO2, thereby accelerating the separation of electrons and holes. The results show that the visible-light absorption of the ZnPc/TiO2 composite is markedly improved compared with that of TiO2 alone. The open-circuit potential (OCP) of 304SS coupled with the ZnPc/TiO2 composite decreased substantially compared with that of 304SS coupled with pure TiO2, reaching approximately −700 mV. The proposed ZnPc/TiO2 composites offer superior photocathodic protection for 304SS.
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•ZnPc/TiO2 composites were synthesized by a simple drop-coating method.•ZnPc/TiO2 composites exhibited substantially greater visible-light absorption.•modest ZnPc improve photocathodic protection performance of 304SS.</description><subject>304 stainless steel</subject><subject>Austenitic stainless steels</subject><subject>Circuits</subject><subject>Composite materials</subject><subject>Conduction bands</subject><subject>Conductors</subject><subject>Corrosion prevention</subject><subject>Corrosion rate</subject><subject>Electromagnetic absorption</subject><subject>Electrons</subject><subject>Molecular orbitals</subject><subject>Photocathodic protection</subject><subject>Stainless steel</subject><subject>TiO2</subject><subject>Titanium dioxide</subject><subject>Ultraviolet radiation</subject><subject>ZnPc/TiO2</subject><issn>1572-6657</issn><issn>1873-2569</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFUE1LxDAUDKLg-vEXpOC53Xw1bW_Koq6wsB7Wi5eQpi9sSrepSVbw35ulevb0hsfMvDeD0B3BBcFELPuihwH0Hg4FxaQpCGE1pmdoQeqK5bQUzXnCZUVzIcrqEl2F0GNM65rQBVp_jG96ubNbmml3mFywEUJmnM-mvYtOq7h3ndXZ5F0EHa0bM2cyhnkWorLjACEkBDDcoAujhgC3v_MavT8_7VbrfLN9eV09bnLNOI55jQE4Y7jFFWGsbbkytAHV1iAINILykmBBuCKGKaNKpo1QpKsNBQCdVuwa3c--6aPPI4Qoe3f0YzopKatEw0tc88QSM0t7F4IHIydvD8p_S4LlqTXZy7_W5Kk1ObeWhA-zEFKGLwteBm1h1NBZn_LLztn_LH4ArO141w</recordid><startdate>20200201</startdate><enddate>20200201</enddate><creator>Ning, Xiao-bo</creator><creator>Wang, Xiu-tong</creator><creator>Shao, Qian</creator><creator>Ge, Sheng-song</creator><creator>Chi, Li-feng</creator><creator>Nan, You-bo</creator><creator>Liang, Hao</creator><creator>Hou, Bao-rong</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0001-8389-2080</orcidid></search><sort><creationdate>20200201</creationdate><title>ZnPc/TiO2 composites for photocathodic protection of 304 stainless steel</title><author>Ning, Xiao-bo ; Wang, Xiu-tong ; Shao, Qian ; Ge, Sheng-song ; Chi, Li-feng ; Nan, You-bo ; Liang, Hao ; Hou, Bao-rong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c340t-80ee4330b07133bb4af29eab8e61e9624510614a1f3afa53cf6a1d8f2eeec3af3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>304 stainless steel</topic><topic>Austenitic stainless steels</topic><topic>Circuits</topic><topic>Composite materials</topic><topic>Conduction bands</topic><topic>Conductors</topic><topic>Corrosion prevention</topic><topic>Corrosion rate</topic><topic>Electromagnetic absorption</topic><topic>Electrons</topic><topic>Molecular orbitals</topic><topic>Photocathodic protection</topic><topic>Stainless steel</topic><topic>TiO2</topic><topic>Titanium dioxide</topic><topic>Ultraviolet radiation</topic><topic>ZnPc/TiO2</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ning, Xiao-bo</creatorcontrib><creatorcontrib>Wang, Xiu-tong</creatorcontrib><creatorcontrib>Shao, Qian</creatorcontrib><creatorcontrib>Ge, Sheng-song</creatorcontrib><creatorcontrib>Chi, Li-feng</creatorcontrib><creatorcontrib>Nan, You-bo</creatorcontrib><creatorcontrib>Liang, Hao</creatorcontrib><creatorcontrib>Hou, Bao-rong</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of electroanalytical chemistry (Lausanne, Switzerland)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ning, Xiao-bo</au><au>Wang, Xiu-tong</au><au>Shao, Qian</au><au>Ge, Sheng-song</au><au>Chi, Li-feng</au><au>Nan, You-bo</au><au>Liang, Hao</au><au>Hou, Bao-rong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ZnPc/TiO2 composites for photocathodic protection of 304 stainless steel</atitle><jtitle>Journal of electroanalytical chemistry (Lausanne, Switzerland)</jtitle><date>2020-02-01</date><risdate>2020</risdate><volume>858</volume><spage>113802</spage><pages>113802-</pages><artnum>113802</artnum><issn>1572-6657</issn><eissn>1873-2569</eissn><abstract>ZnPc/TiO2 composites were synthesized by a drop-coating method and used as photoanodes for photocathodic protection to slow the corrosion of 304 stainless steel (304SS). TiO2 is a wide-band-gap (3.2 eV) conductor that only absorbs UV light with a wavelength <380 nm, and the recombination rate of photogenerated carriers in TiO2 is high. Zinc phthalocyanine (ZnPc) is a material with strong visible-light absorption. The combination of ZnPc and TiO2 can increase the absorption of visible light. Furthermore, the lowest unoccupied molecular orbital (LUMO) conduction-band level of ZnPc is higher than that of TiO2; thus, the electrons in ZnPc excited by the light can migrate to the conduction band of TiO2, thereby accelerating the separation of electrons and holes. The results show that the visible-light absorption of the ZnPc/TiO2 composite is markedly improved compared with that of TiO2 alone. The open-circuit potential (OCP) of 304SS coupled with the ZnPc/TiO2 composite decreased substantially compared with that of 304SS coupled with pure TiO2, reaching approximately −700 mV. The proposed ZnPc/TiO2 composites offer superior photocathodic protection for 304SS.
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•ZnPc/TiO2 composites were synthesized by a simple drop-coating method.•ZnPc/TiO2 composites exhibited substantially greater visible-light absorption.•modest ZnPc improve photocathodic protection performance of 304SS.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jelechem.2019.113802</doi><orcidid>https://orcid.org/0000-0001-8389-2080</orcidid></addata></record> |
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| ispartof | Journal of electroanalytical chemistry (Lausanne, Switzerland), 2020-02, Vol.858, p.113802, Article 113802 |
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| language | eng |
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| source | Elsevier |
| subjects | 304 stainless steel Austenitic stainless steels Circuits Composite materials Conduction bands Conductors Corrosion prevention Corrosion rate Electromagnetic absorption Electrons Molecular orbitals Photocathodic protection Stainless steel TiO2 Titanium dioxide Ultraviolet radiation ZnPc/TiO2 |
| title | ZnPc/TiO2 composites for photocathodic protection of 304 stainless steel |
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