Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance
The development of photocatalystsor their modification to obtain new photocatalytic performances for the removal of contaminants is a challenge. Hydroxyapatite (HAp), (Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub>), is an inorganic compon...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/12/1347 |
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| author | Rafael Lisandro Pereira Rocha Thalena Lima Silva Francisca Pereira Araujo Ewerton Gomes Vieira Luzia Maria Honório Marcelo Barbosa Furtini Maria Gardênnia da Fonseca Edson Cavalcanti da Silva-Filho Josy Anteveli Osajima |
| author_facet | Rafael Lisandro Pereira Rocha Thalena Lima Silva Francisca Pereira Araujo Ewerton Gomes Vieira Luzia Maria Honório Marcelo Barbosa Furtini Maria Gardênnia da Fonseca Edson Cavalcanti da Silva-Filho Josy Anteveli Osajima |
| author_sort | Rafael Lisandro Pereira Rocha |
| collection | DOAJ |
| description | The development of photocatalystsor their modification to obtain new photocatalytic performances for the removal of contaminants is a challenge. Hydroxyapatite (HAp), (Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub>), is an inorganic component with a high superficial area and low toxicity and the presence of metal in its structure can be an interesting strategy for the photocatalytic approach. This work aimed to synthesize gallium-containing HAp (Ga-HAp) as a promising material for photocatalytic performance. The synthesis was performed by the suspension–precipitation method. The material was characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Morphological analysis employed field emission scanning electron microscope (FESEM) and the elemental analysis by energy-dispersive spectroscopy (EDS). To evaluate the photocatalytic activity, methylene blue (MB) dye was used as a pollutant model under UV light for 120 min. The influence of Ga-HAp concentration (0.25, 0.50, and 1.00 g·L<sup>−1</sup>) and kinetic reaction was also studied. The Ga-HAp was successfully obtained by the suspension–precipitation method. The structural characterization by XRD and FESEM-EDS elucidated the presence of gallium in the structure of hydroxyapatite. The XPS results indicated the substitution of gallium in the crystal lattice of the material. The discoloration rate of MB dye using Ga-Hap was calculated by pseudo first-order kinetics, and the best rate constant was 7.5 × 10<sup>−3</sup> min<sup>−1</sup> using 1.00 g·L<sup>−1</sup> of photocatalyst. The concentration of Ga-HAp influenced the photocatalytic process, because the discoloration rate increased as a function of the concentration of material. Therefore, Ga-HAp is a promising material for environmental remediation. |
| first_indexed | 2024-03-10T03:31:17Z |
| format | Article |
| id | doaj.art-5d8457b35d2d49ec91498038ddd353c3 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T03:31:17Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-5d8457b35d2d49ec91498038ddd353c32023-11-23T09:41:33ZengMDPI AGMinerals2075-163X2021-11-011112134710.3390/min11121347Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic PerformanceRafael Lisandro Pereira Rocha0Thalena Lima Silva1Francisca Pereira Araujo2Ewerton Gomes Vieira3Luzia Maria Honório4Marcelo Barbosa Furtini5Maria Gardênnia da Fonseca6Edson Cavalcanti da Silva-Filho7Josy Anteveli Osajima8Interdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilFederal Institute of Maranhão, IFMA, Campus Buriticupu, Buriticupu 65393-000, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilNúcleo de Pesquisa e Extensão-Laboratório de Combustíveis e Materiais (NPE-LACOM), Universidade Federal da Paraíba, João Pessoa 58051-970, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilInterdisciplinary Laboratory for Advanced Materials (LIMAV), UFPI, Teresina 64049-550, BrazilThe development of photocatalystsor their modification to obtain new photocatalytic performances for the removal of contaminants is a challenge. Hydroxyapatite (HAp), (Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub>), is an inorganic component with a high superficial area and low toxicity and the presence of metal in its structure can be an interesting strategy for the photocatalytic approach. This work aimed to synthesize gallium-containing HAp (Ga-HAp) as a promising material for photocatalytic performance. The synthesis was performed by the suspension–precipitation method. The material was characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Morphological analysis employed field emission scanning electron microscope (FESEM) and the elemental analysis by energy-dispersive spectroscopy (EDS). To evaluate the photocatalytic activity, methylene blue (MB) dye was used as a pollutant model under UV light for 120 min. The influence of Ga-HAp concentration (0.25, 0.50, and 1.00 g·L<sup>−1</sup>) and kinetic reaction was also studied. The Ga-HAp was successfully obtained by the suspension–precipitation method. The structural characterization by XRD and FESEM-EDS elucidated the presence of gallium in the structure of hydroxyapatite. The XPS results indicated the substitution of gallium in the crystal lattice of the material. The discoloration rate of MB dye using Ga-Hap was calculated by pseudo first-order kinetics, and the best rate constant was 7.5 × 10<sup>−3</sup> min<sup>−1</sup> using 1.00 g·L<sup>−1</sup> of photocatalyst. The concentration of Ga-HAp influenced the photocatalytic process, because the discoloration rate increased as a function of the concentration of material. Therefore, Ga-HAp is a promising material for environmental remediation.https://www.mdpi.com/2075-163X/11/12/1347hydroxyapatitemethylene bluedyediscolorationmetal |
| spellingShingle | Rafael Lisandro Pereira Rocha Thalena Lima Silva Francisca Pereira Araujo Ewerton Gomes Vieira Luzia Maria Honório Marcelo Barbosa Furtini Maria Gardênnia da Fonseca Edson Cavalcanti da Silva-Filho Josy Anteveli Osajima Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance Minerals hydroxyapatite methylene blue dye discoloration metal |
| title | Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance |
| title_full | Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance |
| title_fullStr | Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance |
| title_full_unstemmed | Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance |
| title_short | Gallium-Containing Hydroxyapatite as a Promising Material for Photocatalytic Performance |
| title_sort | gallium containing hydroxyapatite as a promising material for photocatalytic performance |
| topic | hydroxyapatite methylene blue dye discoloration metal |
| url | https://www.mdpi.com/2075-163X/11/12/1347 |
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