Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions
This paper reports easy and fast synthesis of PbMoO<sub>4</sub> nanocrystals by microwave-assisted hydrothermal (MH) method at different synthesis times (1, 10, 30 and 60 min) at 100 °C. X-ray diffraction, Rietveld refinement and Raman spectroscopy confirm all characteristics of diffract...
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MDPI AG
2023-03-01
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| Series: | Colorants |
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| Online Access: | https://www.mdpi.com/2079-6447/2/1/8 |
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| author | Francisco Nobre Jairo Trindade Marcus do Nascimento Giancarlo Souza Otoniel Mendes Anderson Albuquerque Júlio Sambrano Paulo Couceiro Walter Brito Yurimiler Leyet Ruiz José Milton De Matos |
| author_facet | Francisco Nobre Jairo Trindade Marcus do Nascimento Giancarlo Souza Otoniel Mendes Anderson Albuquerque Júlio Sambrano Paulo Couceiro Walter Brito Yurimiler Leyet Ruiz José Milton De Matos |
| author_sort | Francisco Nobre |
| collection | DOAJ |
| description | This paper reports easy and fast synthesis of PbMoO<sub>4</sub> nanocrystals by microwave-assisted hydrothermal (MH) method at different synthesis times (1, 10, 30 and 60 min) at 100 °C. X-ray diffraction, Rietveld refinement and Raman spectroscopy confirm all characteristics of diffraction peaks and active vibrational modes of the pure scheelite structure (tetragonal, I41/a) for all synthesized PbMoO<sub>4</sub> nanocrystals. The optical bandgap calculated directly from the samples is close to 3.5 eV. The images collected by scanning electron microscopy show particles with mean length from 159.90(8) nm to 303.02(3) nm with greater exposure of planes (111), (100), (011) and (110). The photocatalytic activity of PbMoO<sub>4</sub> nanocrystals against RhB and RBBR dyes resulted in successful degradation in short time intervals using ultraviolet light, where the best performance was achieved for the PbMoO<sub>4</sub>-10 sample, which was 29.2 and 51.8 times more effective than photolysis. The contribution of oxidant species was monitored by radical scavengers, which confirms that holes (<i>h</i><sup>+</sup>) are the main oxidative species in photodegradation of RhB and RBBR dyes, while reuse of the catalyst against RhB and RBBR dyes confirms high stability of the catalyst, although recycled four times. |
| first_indexed | 2024-03-11T06:43:40Z |
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| issn | 2079-6447 |
| language | English |
| last_indexed | 2024-03-11T06:43:40Z |
| publishDate | 2023-03-01 |
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| record_format | Article |
| series | Colorants |
| spelling | doaj.art-5312183fd27946499ae3046b217405302023-11-17T10:25:33ZengMDPI AGColorants2079-64472023-03-012111113410.3390/colorants2010008Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental ConditionsFrancisco Nobre0Jairo Trindade1Marcus do Nascimento2Giancarlo Souza3Otoniel Mendes4Anderson Albuquerque5Júlio Sambrano6Paulo Couceiro7Walter Brito8Yurimiler Leyet Ruiz9José Milton De Matos10Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Departamento de Química, Alimentos e Meio Ambiente (DQA), Campus Manaus Centro, IFAM-CMC-AM, Manaus CEP 69020-120, BrazilLaboratório Interdisciplinar de Materiais Avançados, LIMAV-UFPI, Universidade Federal do Piauí, Departamento de Química, Centro de Ciências da Natureza (CCN), Teresina CEP 69049-550, BrazilInstituto Federal de Educação, Ciência e Tecnologia do Amazonas, Departamento de Química, Alimentos e Meio Ambiente (DQA), Campus Manaus Centro, IFAM-CMC-AM, Manaus CEP 69020-120, BrazilLaboratório Interdisciplinar de Materiais Avançados, LIMAV-UFPI, Universidade Federal do Piauí, Departamento de Química, Centro de Ciências da Natureza (CCN), Teresina CEP 69049-550, BrazilDepartamento de Física, Escola Superior de Tecnologia—EST (LabFENTOM), Universidade do Estado do Amazonas, Manaus CEP 69050-020, BrazilInstituto de Química, Departamento de Química, Universidade Federal do Rio Grande do Norte (UFRN), Natal CEP 59078-970, BrazilGrupo de Modelagem e Simulação Molecular, INCTMN-UNESP, São Paulo State University, Bauru CEP 17033-360, BrazilLaboratório de Físico-Química, LFQ-UFAM, Departamento de Química, Universidade Federal do Amazonas, Manaus CEP 69077-000, BrazilLaboratório de Bioeletrônica e Eletroanalítica (LABEL), Departamento de Química, Universidade Federal do Amazonas, Manaus CEP 69077-000, BrazilDepartamento de Engenharia de Materiais, Universidade Federal do Amazonas, Manaus CEP 69077-000, BrazilLaboratório Interdisciplinar de Materiais Avançados, LIMAV-UFPI, Universidade Federal do Piauí, Departamento de Química, Centro de Ciências da Natureza (CCN), Teresina CEP 69049-550, BrazilThis paper reports easy and fast synthesis of PbMoO<sub>4</sub> nanocrystals by microwave-assisted hydrothermal (MH) method at different synthesis times (1, 10, 30 and 60 min) at 100 °C. X-ray diffraction, Rietveld refinement and Raman spectroscopy confirm all characteristics of diffraction peaks and active vibrational modes of the pure scheelite structure (tetragonal, I41/a) for all synthesized PbMoO<sub>4</sub> nanocrystals. The optical bandgap calculated directly from the samples is close to 3.5 eV. The images collected by scanning electron microscopy show particles with mean length from 159.90(8) nm to 303.02(3) nm with greater exposure of planes (111), (100), (011) and (110). The photocatalytic activity of PbMoO<sub>4</sub> nanocrystals against RhB and RBBR dyes resulted in successful degradation in short time intervals using ultraviolet light, where the best performance was achieved for the PbMoO<sub>4</sub>-10 sample, which was 29.2 and 51.8 times more effective than photolysis. The contribution of oxidant species was monitored by radical scavengers, which confirms that holes (<i>h</i><sup>+</sup>) are the main oxidative species in photodegradation of RhB and RBBR dyes, while reuse of the catalyst against RhB and RBBR dyes confirms high stability of the catalyst, although recycled four times.https://www.mdpi.com/2079-6447/2/1/8photocatalysislead molybdateDFT |
| spellingShingle | Francisco Nobre Jairo Trindade Marcus do Nascimento Giancarlo Souza Otoniel Mendes Anderson Albuquerque Júlio Sambrano Paulo Couceiro Walter Brito Yurimiler Leyet Ruiz José Milton De Matos Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions Colorants photocatalysis lead molybdate DFT |
| title | Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions |
| title_full | Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions |
| title_fullStr | Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions |
| title_full_unstemmed | Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions |
| title_short | Photocatalytic Properties of PbMoO<sub>4</sub> Nanocrystals against Cationic and Anionic Dyes in Several Experimental Conditions |
| title_sort | photocatalytic properties of pbmoo sub 4 sub nanocrystals against cationic and anionic dyes in several experimental conditions |
| topic | photocatalysis lead molybdate DFT |
| url | https://www.mdpi.com/2079-6447/2/1/8 |
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