Synthesis, Characterization, and Regeneration of Ag/TiO<sub>2</sub> Nanoparticles: Photocatalytic Removal of Mixed Dye Pollutants
Titanium dioxide nanoparticles were prepared via the hydrothermal method, and silver was supported on Ti<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="normal">O</mi>...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
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| Series: | Engineering Proceedings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-4591/59/1/216 |
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| Summary: | Titanium dioxide nanoparticles were prepared via the hydrothermal method, and silver was supported on Ti<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></semantics></math></inline-formula> nanoparticles to form Ag/Ti<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></semantics></math></inline-formula> using the photoreduction method. The prepared samples were dried overnight at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>60</mn><msup><mtext> </mtext><mo>∘</mo></msup><mi mathvariant="normal">C</mi></mrow></semantics></math></inline-formula> and then calcined at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>500</mn><msup><mtext> </mtext><mo>∘</mo></msup><mi mathvariant="normal">C</mi></mrow></semantics></math></inline-formula> for 2 h. Structural and morphological characterization were carried out using X-ray diffraction, field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The adsorption performance and photocatalytic activity of the Ag/Ti<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></semantics></math></inline-formula> were investigated using malachite green dye (MG) as a model organic pollutant in water. Along the way, the effects of various parameters were examined, such as regeneration experiments and removal of a laboratory sample (a mixture of several dyes) from aqueous solutions. The photocatalytic degradation efficiency reached 83.9%, 78.8%, and 68.5% during three cycles, compared to the standard solution (fresh), which reached 90.9%. These results underscore the potential application of Ag/Ti<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></semantics></math></inline-formula> in environmental remediation, particularly in the degradation of organic dyes. |
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| ISSN: | 2673-4591 |