NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS
A new δ-FeOOH supported nano-Au catalyst was prepared by a facile method using HAuCl4 as the gold source and NaBH4 as the reducing agent. The samples (denoted as AuNPs/FeOOH) were characterized by means of X-ray diffraction (XRD), UV-vis and infrared spectroscopies and scanning electron microscope (SEM). The obtained characterization data confirmed the formation of Au nanoparticles on the δ-FeOOH matrix surface. SEM observations showed that Au nanoparticles have a spherical morphology and good dispersion with a narrow size distribution on the surface of iron (III) oxyhydroxide. The catalyst exhibits significantly high catalytic activity for hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) at room temperature. The high performance obtained can be attributed to the specific characteristics of the nanostructure of the catalyst of nano-Au deposited on the external surface of δ-FeOOH, including plenty of oxygen-containing groups of δ-FeOOH for anchoring AuNPs. Moreover, the catalytic activity increased when the AuNPs content in the δ-FeOOH support. The AuNPs-based δ-FeOOH hybrids are interesting catalysts for hydrogenation of nitrophenols to aminophenols.
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Sociedade Brasileira de Química
2017
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oai:scielo:S0100-404220170005005342017-07-04NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAISAzevedo,Camila Kauany da SilvaReis,Eduardo Arizono dosGermino,José CarlosMoreto,Jéferson AparecidoTerezo,Ailton JoséQuites,Fernando Júnior gold nanoparticles iron (III) oxyhydroxide catalysis nitrophenols A new δ-FeOOH supported nano-Au catalyst was prepared by a facile method using HAuCl4 as the gold source and NaBH4 as the reducing agent. The samples (denoted as AuNPs/FeOOH) were characterized by means of X-ray diffraction (XRD), UV-vis and infrared spectroscopies and scanning electron microscope (SEM). The obtained characterization data confirmed the formation of Au nanoparticles on the δ-FeOOH matrix surface. SEM observations showed that Au nanoparticles have a spherical morphology and good dispersion with a narrow size distribution on the surface of iron (III) oxyhydroxide. The catalyst exhibits significantly high catalytic activity for hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) at room temperature. The high performance obtained can be attributed to the specific characteristics of the nanostructure of the catalyst of nano-Au deposited on the external surface of δ-FeOOH, including plenty of oxygen-containing groups of δ-FeOOH for anchoring AuNPs. Moreover, the catalytic activity increased when the AuNPs content in the δ-FeOOH support. The AuNPs-based δ-FeOOH hybrids are interesting catalysts for hydrogenation of nitrophenols to aminophenols.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaQuímica Nova v.40 n.5 20172017-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000500534pt10.21577/0100-4042.20170046 |
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Azevedo,Camila Kauany da Silva Reis,Eduardo Arizono dos Germino,José Carlos Moreto,Jéferson Aparecido Terezo,Ailton José Quites,Fernando Júnior |
| spellingShingle |
Azevedo,Camila Kauany da Silva Reis,Eduardo Arizono dos Germino,José Carlos Moreto,Jéferson Aparecido Terezo,Ailton José Quites,Fernando Júnior NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| author_facet |
Azevedo,Camila Kauany da Silva Reis,Eduardo Arizono dos Germino,José Carlos Moreto,Jéferson Aparecido Terezo,Ailton José Quites,Fernando Júnior |
| author_sort |
Azevedo,Camila Kauany da Silva |
| title |
NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| title_short |
NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| title_full |
NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| title_fullStr |
NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| title_full_unstemmed |
NOVOS HÍBRIDOS BASEADOS EM OXIHIDRÓXIDO DE FERRO(III) E NANOPARTÍCULAS DE OURO (AuNPs/FeOOH) COMO CATALISADORES PARA A REDUÇÃO DE POLUENTES ORGÂNICOS AMBIENTAIS |
| title_sort |
novos híbridos baseados em oxihidróxido de ferro(iii) e nanopartículas de ouro (aunps/feooh) como catalisadores para a redução de poluentes orgânicos ambientais |
| description |
A new δ-FeOOH supported nano-Au catalyst was prepared by a facile method using HAuCl4 as the gold source and NaBH4 as the reducing agent. The samples (denoted as AuNPs/FeOOH) were characterized by means of X-ray diffraction (XRD), UV-vis and infrared spectroscopies and scanning electron microscope (SEM). The obtained characterization data confirmed the formation of Au nanoparticles on the δ-FeOOH matrix surface. SEM observations showed that Au nanoparticles have a spherical morphology and good dispersion with a narrow size distribution on the surface of iron (III) oxyhydroxide. The catalyst exhibits significantly high catalytic activity for hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) at room temperature. The high performance obtained can be attributed to the specific characteristics of the nanostructure of the catalyst of nano-Au deposited on the external surface of δ-FeOOH, including plenty of oxygen-containing groups of δ-FeOOH for anchoring AuNPs. Moreover, the catalytic activity increased when the AuNPs content in the δ-FeOOH support. The AuNPs-based δ-FeOOH hybrids are interesting catalysts for hydrogenation of nitrophenols to aminophenols. |
| publisher |
Sociedade Brasileira de Química |
| publishDate |
2017 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000500534 |
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