Synthesis and characterization of Fe/Mn co-doped CuCr2O4 black pigment with high near-infrared reflectance
•Compared with CuCr2O4, the absorption of Fe/Mn-CuCr2O4 in visible region is increased, showing better blackness.•The reflectance of Fe/Mn-CuCr2O4 in near infrared region is increased to 27.7%.•The mechanism of near infrared reflectance (NIR) is discussed by electronic properties of pigments.•CuCr1....
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| Veröffentlicht in: | Solar energy 2022-03, Vol.234, p.240-250 |
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| creator | Bai, Mingmin Li, Weixin Hong, Yuhong Wang, Shaohua Wang, Yongqing Chang, Qibing |
| description | •Compared with CuCr2O4, the absorption of Fe/Mn-CuCr2O4 in visible region is increased, showing better blackness.•The reflectance of Fe/Mn-CuCr2O4 in near infrared region is increased to 27.7%.•The mechanism of near infrared reflectance (NIR) is discussed by electronic properties of pigments.•CuCr1.93Fe0.07O4 applied to the roofing material shows lower interior temperature and saves energy about 162.8 W m−2
A deep black near-infrared reflectance pigment based on CuCr2O4 doped with Fe and Mn ions was described. The formula of the pigment was CuCr2-x-yFexMnyO4. The band gap of pigments decreased from 1.25 eV to 1.00 eV along with the substitution of Fe3+ and Mn3+ for Cr3+ in CuCr2O4. This change originated from the charge transfer of O2p to Fe3d and Mn3d, and d-d intra-atomic transitions of Fe and Mn ions, which resulted in the decrement of L* from 21.21 to 17.72. For doped CuCr2O4, the higher NIR reflectance could be attributed to the decrease of free carries. For the depressions of reflective spectra at around λ = 1240 nm(1 eV) for doped CuCr2O4, the electronic transition between defect levels and conduction band could be the main reason. The optimal R* was 27.7%, which was higher than 19% of CuCr2O4. CuCr1.93Fe0.07O4 and CuCr2O4 were selected for building roof coating to determine the thermal insulation effect, and CuCr1.93Fe0.07O4 was better than CuCr2O4. Therefore, CuCr2-x-yFexMnyO4 pigments could be used as cool coatings for building roofs. |
| doi_str_mv | 10.1016/j.solener.2022.02.002 |
| format | Article |
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A deep black near-infrared reflectance pigment based on CuCr2O4 doped with Fe and Mn ions was described. The formula of the pigment was CuCr2-x-yFexMnyO4. The band gap of pigments decreased from 1.25 eV to 1.00 eV along with the substitution of Fe3+ and Mn3+ for Cr3+ in CuCr2O4. This change originated from the charge transfer of O2p to Fe3d and Mn3d, and d-d intra-atomic transitions of Fe and Mn ions, which resulted in the decrement of L* from 21.21 to 17.72. For doped CuCr2O4, the higher NIR reflectance could be attributed to the decrease of free carries. For the depressions of reflective spectra at around λ = 1240 nm(1 eV) for doped CuCr2O4, the electronic transition between defect levels and conduction band could be the main reason. The optimal R* was 27.7%, which was higher than 19% of CuCr2O4. CuCr1.93Fe0.07O4 and CuCr2O4 were selected for building roof coating to determine the thermal insulation effect, and CuCr1.93Fe0.07O4 was better than CuCr2O4. Therefore, CuCr2-x-yFexMnyO4 pigments could be used as cool coatings for building roofs.</description><identifier>ISSN: 0038-092X</identifier><identifier>EISSN: 1471-1257</identifier><identifier>DOI: 10.1016/j.solener.2022.02.002</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Charge transfer ; Conduction bands ; Cool pigment ; Copper chrome black ; I.R. radiation ; Infrared reflection ; Ions ; Iron ; Manganese ; NIR reflectance ; Pigments ; Reflectance ; Roofs ; Solar energy ; Spinel ; Thermal insulation</subject><ispartof>Solar energy, 2022-03, Vol.234, p.240-250</ispartof><rights>2022 International Solar Energy Society</rights><rights>Copyright Pergamon Press Inc. Mar 1, 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-9a0484d30a62ca94cb1e30bcef56e2afc87262213fcb755f154f8405f452b9cd3</citedby><cites>FETCH-LOGICAL-c337t-9a0484d30a62ca94cb1e30bcef56e2afc87262213fcb755f154f8405f452b9cd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.solener.2022.02.002$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Bai, Mingmin</creatorcontrib><creatorcontrib>Li, Weixin</creatorcontrib><creatorcontrib>Hong, Yuhong</creatorcontrib><creatorcontrib>Wang, Shaohua</creatorcontrib><creatorcontrib>Wang, Yongqing</creatorcontrib><creatorcontrib>Chang, Qibing</creatorcontrib><title>Synthesis and characterization of Fe/Mn co-doped CuCr2O4 black pigment with high near-infrared reflectance</title><title>Solar energy</title><description>•Compared with CuCr2O4, the absorption of Fe/Mn-CuCr2O4 in visible region is increased, showing better blackness.•The reflectance of Fe/Mn-CuCr2O4 in near infrared region is increased to 27.7%.•The mechanism of near infrared reflectance (NIR) is discussed by electronic properties of pigments.•CuCr1.93Fe0.07O4 applied to the roofing material shows lower interior temperature and saves energy about 162.8 W m−2
A deep black near-infrared reflectance pigment based on CuCr2O4 doped with Fe and Mn ions was described. The formula of the pigment was CuCr2-x-yFexMnyO4. The band gap of pigments decreased from 1.25 eV to 1.00 eV along with the substitution of Fe3+ and Mn3+ for Cr3+ in CuCr2O4. This change originated from the charge transfer of O2p to Fe3d and Mn3d, and d-d intra-atomic transitions of Fe and Mn ions, which resulted in the decrement of L* from 21.21 to 17.72. For doped CuCr2O4, the higher NIR reflectance could be attributed to the decrease of free carries. For the depressions of reflective spectra at around λ = 1240 nm(1 eV) for doped CuCr2O4, the electronic transition between defect levels and conduction band could be the main reason. The optimal R* was 27.7%, which was higher than 19% of CuCr2O4. CuCr1.93Fe0.07O4 and CuCr2O4 were selected for building roof coating to determine the thermal insulation effect, and CuCr1.93Fe0.07O4 was better than CuCr2O4. Therefore, CuCr2-x-yFexMnyO4 pigments could be used as cool coatings for building roofs.</description><subject>Charge transfer</subject><subject>Conduction bands</subject><subject>Cool pigment</subject><subject>Copper chrome black</subject><subject>I.R. radiation</subject><subject>Infrared reflection</subject><subject>Ions</subject><subject>Iron</subject><subject>Manganese</subject><subject>NIR reflectance</subject><subject>Pigments</subject><subject>Reflectance</subject><subject>Roofs</subject><subject>Solar energy</subject><subject>Spinel</subject><subject>Thermal insulation</subject><issn>0038-092X</issn><issn>1471-1257</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNqFUE1LAzEUDKJgrf4EIeB560s2-3USKVaFigcVvIVs9sXNWpOabJX66420d2HgHd7MvDdDyDmDGQNWXg6z6FfoMMw4cD6DBOAHZMJExTLGi-qQTADyOoOGvx6TkxgHAFaxupqQ4Wnrxh6jjVS5jupeBaVHDPZHjdY76g1d4OWDo9pnnV9jR-ebeeCPgrYrpd_p2r59oBvptx172tu3njpUIbPOBBUSO6BZoR6V03hKjoxaRTzbzyl5Wdw8z--y5ePt_fx6mek8r8asUSBq0eWgSq5VI3TLMIdWoylK5MrouuIl5yw3uq2KwrBCmFpAYUTB20Z3-ZRc7HzXwX9uMI5y8Jvg0knJSwF505Q1S6xix9LBx5jelOtgP1TYSgbyr1Y5yH2t8q9WCQnAk-5qp8MU4cumbdQWU7zOhhRUdt7-4_AL-fmEBg</recordid><startdate>20220301</startdate><enddate>20220301</enddate><creator>Bai, Mingmin</creator><creator>Li, Weixin</creator><creator>Hong, Yuhong</creator><creator>Wang, Shaohua</creator><creator>Wang, Yongqing</creator><creator>Chang, Qibing</creator><general>Elsevier Ltd</general><general>Pergamon Press Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7ST</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><scope>SOI</scope></search><sort><creationdate>20220301</creationdate><title>Synthesis and characterization of Fe/Mn co-doped CuCr2O4 black pigment with high near-infrared reflectance</title><author>Bai, Mingmin ; Li, Weixin ; Hong, Yuhong ; Wang, Shaohua ; Wang, Yongqing ; Chang, Qibing</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-9a0484d30a62ca94cb1e30bcef56e2afc87262213fcb755f154f8405f452b9cd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Charge transfer</topic><topic>Conduction bands</topic><topic>Cool pigment</topic><topic>Copper chrome black</topic><topic>I.R. radiation</topic><topic>Infrared reflection</topic><topic>Ions</topic><topic>Iron</topic><topic>Manganese</topic><topic>NIR reflectance</topic><topic>Pigments</topic><topic>Reflectance</topic><topic>Roofs</topic><topic>Solar energy</topic><topic>Spinel</topic><topic>Thermal insulation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bai, Mingmin</creatorcontrib><creatorcontrib>Li, Weixin</creatorcontrib><creatorcontrib>Hong, Yuhong</creatorcontrib><creatorcontrib>Wang, Shaohua</creatorcontrib><creatorcontrib>Wang, Yongqing</creatorcontrib><creatorcontrib>Chang, Qibing</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Environment Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Solar energy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bai, Mingmin</au><au>Li, Weixin</au><au>Hong, Yuhong</au><au>Wang, Shaohua</au><au>Wang, Yongqing</au><au>Chang, Qibing</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Synthesis and characterization of Fe/Mn co-doped CuCr2O4 black pigment with high near-infrared reflectance</atitle><jtitle>Solar energy</jtitle><date>2022-03-01</date><risdate>2022</risdate><volume>234</volume><spage>240</spage><epage>250</epage><pages>240-250</pages><issn>0038-092X</issn><eissn>1471-1257</eissn><abstract>•Compared with CuCr2O4, the absorption of Fe/Mn-CuCr2O4 in visible region is increased, showing better blackness.•The reflectance of Fe/Mn-CuCr2O4 in near infrared region is increased to 27.7%.•The mechanism of near infrared reflectance (NIR) is discussed by electronic properties of pigments.•CuCr1.93Fe0.07O4 applied to the roofing material shows lower interior temperature and saves energy about 162.8 W m−2
A deep black near-infrared reflectance pigment based on CuCr2O4 doped with Fe and Mn ions was described. The formula of the pigment was CuCr2-x-yFexMnyO4. The band gap of pigments decreased from 1.25 eV to 1.00 eV along with the substitution of Fe3+ and Mn3+ for Cr3+ in CuCr2O4. This change originated from the charge transfer of O2p to Fe3d and Mn3d, and d-d intra-atomic transitions of Fe and Mn ions, which resulted in the decrement of L* from 21.21 to 17.72. For doped CuCr2O4, the higher NIR reflectance could be attributed to the decrease of free carries. For the depressions of reflective spectra at around λ = 1240 nm(1 eV) for doped CuCr2O4, the electronic transition between defect levels and conduction band could be the main reason. The optimal R* was 27.7%, which was higher than 19% of CuCr2O4. CuCr1.93Fe0.07O4 and CuCr2O4 were selected for building roof coating to determine the thermal insulation effect, and CuCr1.93Fe0.07O4 was better than CuCr2O4. Therefore, CuCr2-x-yFexMnyO4 pigments could be used as cool coatings for building roofs.</abstract><cop>New York</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.solener.2022.02.002</doi><tpages>11</tpages></addata></record> |
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| subjects | Charge transfer Conduction bands Cool pigment Copper chrome black I.R. radiation Infrared reflection Ions Iron Manganese NIR reflectance Pigments Reflectance Roofs Solar energy Spinel Thermal insulation |
| title | Synthesis and characterization of Fe/Mn co-doped CuCr2O4 black pigment with high near-infrared reflectance |
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