Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys
Azo dyes are common aqueous environmental pollutants in developing countries. Hydrogenation is a highly effective method for decomposition of azo dyes; however, this method requires the use of noble metals as catalysts. In this study, we investigated the use of multi-compo...
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| Format: | Article |
| Language: | English |
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Japan Society on Water Environment
2023-01-01
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| Series: | Journal of Water and Environment Technology |
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| Online Access: |
https://www.jstage.jst.go.jp/article/jwet/21/5/21_23-030/_pdf
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| _version_ | 1797399241704865792 |
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| author | Shota Yokoyama Yasukazu Kobayashi Ryo Shoji |
| author_facet | Shota Yokoyama Yasukazu Kobayashi Ryo Shoji |
| author_sort | Shota Yokoyama |
| collection | DOAJ |
| description | Azo dyes are common aqueous environmental pollutants in developing countries. Hydrogenation is a highly effective method for decomposition of azo dyes; however, this method requires the use of noble metals as catalysts. In this study, we investigated the use of multi-component alloy catalysts. Eight multi-component alloys (CoFeNiTiCr(800), CoFeNiTiAl(800), CoFeNiTiV(800), Fe40Mn10Cr15Ni25Al5(800), Fe35Mn10Cr20Ni35(800), Fe50Mn27Cr13Ni10(800), Al0.2Co1.5CrFeNi1.5Ti0.5(600), and Al0.2Co1.5CrFeNi1.5Ti0.5(800)), where numbers in brackets represent calcine temperature (°C), were used for hydrogenation of methyl orange and Acid Orange 7 with NaBH4. These multicomponent alloys were prepared from oxide precursors using a nonelectrochemical molten salt synthesis method. The reaction rates increased in the order of Al0.2Co1.5CrFeNi1.5Ti0.5(800) < CoFeNiTiAl(800) < Al0.2Co1.5CrFeNi1.5Ti0.5(600) for hydrogenation of methyl orange. Al0.2Co1.5CrFeNi1.5Ti0.5(600) rapidly decreased the methyl orange concentration to almost zero within 10 Ein. The reaction rates increased in the order of CoFeNiTiCr(800) < Al0.2Co1.5CrFeNi1.5Ti0.5(600) < CoFeNiTiV(800) for hydrogenation of Acid Orange 7. CoFeNiTiV(800) rapidly decreased the Acid Orange 7 concentration to almost zero within 10 Ein. This difference in catalytic activity for each azo dye was thought to arise because Acid Orange 7 was insufficiently decomposed by the reducing agent NaBH4, and this affected its interaction with the catalyst. |
| first_indexed | 2024-03-09T01:37:30Z |
| format | Article |
| id | doaj.art-b95d830b74a64efbb3c83fc71256e2a4 |
| institution | Directory Open Access Journal |
| issn | 1348-2165 |
| language | English |
| last_indexed | 2024-03-09T01:37:30Z |
| publishDate | 2023-01-01 |
| publisher | Japan Society on Water Environment |
| record_format | Article |
| series | Journal of Water and Environment Technology |
| spelling | doaj.art-b95d830b74a64efbb3c83fc71256e2a42023-12-09T03:10:43ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21652023-01-0121524925710.2965/jwet.23-03010.2965/jwet.23-030Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent AlloysShota Yokoyama0Yasukazu Kobayashi1Ryo Shoji2 Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, Hachioji, Japan Renewable Energy Research Centre, National Institute of Advanced Industrial Science and Technology, Koriyama, Japan Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, Hachioji, Japan Azo dyes are common aqueous environmental pollutants in developing countries. Hydrogenation is a highly effective method for decomposition of azo dyes; however, this method requires the use of noble metals as catalysts. In this study, we investigated the use of multi-component alloy catalysts. Eight multi-component alloys (CoFeNiTiCr(800), CoFeNiTiAl(800), CoFeNiTiV(800), Fe40Mn10Cr15Ni25Al5(800), Fe35Mn10Cr20Ni35(800), Fe50Mn27Cr13Ni10(800), Al0.2Co1.5CrFeNi1.5Ti0.5(600), and Al0.2Co1.5CrFeNi1.5Ti0.5(800)), where numbers in brackets represent calcine temperature (°C), were used for hydrogenation of methyl orange and Acid Orange 7 with NaBH4. These multicomponent alloys were prepared from oxide precursors using a nonelectrochemical molten salt synthesis method. The reaction rates increased in the order of Al0.2Co1.5CrFeNi1.5Ti0.5(800) < CoFeNiTiAl(800) < Al0.2Co1.5CrFeNi1.5Ti0.5(600) for hydrogenation of methyl orange. Al0.2Co1.5CrFeNi1.5Ti0.5(600) rapidly decreased the methyl orange concentration to almost zero within 10 Ein. The reaction rates increased in the order of CoFeNiTiCr(800) < Al0.2Co1.5CrFeNi1.5Ti0.5(600) < CoFeNiTiV(800) for hydrogenation of Acid Orange 7. CoFeNiTiV(800) rapidly decreased the Acid Orange 7 concentration to almost zero within 10 Ein. This difference in catalytic activity for each azo dye was thought to arise because Acid Orange 7 was insufficiently decomposed by the reducing agent NaBH4, and this affected its interaction with the catalyst. https://www.jstage.jst.go.jp/article/jwet/21/5/21_23-030/_pdf azo dyecatalystnon-noble metalreaction rate constant |
| spellingShingle | Shota Yokoyama Yasukazu Kobayashi Ryo Shoji Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys Journal of Water and Environment Technology azo dye catalyst non-noble metal reaction rate constant |
| title | Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys |
| title_full | Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys |
| title_fullStr | Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys |
| title_full_unstemmed | Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys |
| title_short | Catalytic Hydrogenation of Methyl Orange and Acid Orange 7 Using NaBH4 over Core-shell Multicomponent Alloys |
| title_sort | catalytic hydrogenation of methyl orange and acid orange 7 using nabh4 over core shell multicomponent alloys |
| topic | azo dye catalyst non-noble metal reaction rate constant |
| url |
https://www.jstage.jst.go.jp/article/jwet/21/5/21_23-030/_pdf
|
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