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Synthesis, Characterization of the Novel Heterojunction Photocatalyst Sm 2 NdSbO 7 /BiDyO 3 for Efficient Photodegradation of Methyl Parathion.
- Source :
- Catalysts (2073-4344); Jun2024, Vol. 14 Issue 6, p346, 30p
- Publication Year :
- 2024
-
Abstract
- A new catalyst, Sm<subscript>2</subscript>NdSbO<subscript>7</subscript>, was synthesized for the first time by solid-phase sintering. The study utilized X-ray diffraction, transmission electron microscope energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy to examine the structural characteristics of monocrystal BiDyO<subscript>3</subscript>, monocrystal Sm<subscript>2</subscript>NdSbO<subscript>7</subscript> and Sm<subscript>2</subscript>NdSbO<subscript>7</subscript>/BiDyO<subscript>3</subscript> heterojunction photocatalysts (SBHP) prepared by solid-phase sintering. The Sm<subscript>2</subscript>NdSbO<subscript>7</subscript> photocatalyst owned a pyrochlorite structure, belonged to the face-centered cubic crystal system, possessed a space group of Fd3m and a bandgap width of 2.750 eV. After 145 min of visible light irradiation (145-VLIRD), the removal rate (RMR) of methyl parathion (MP) or total organic carbon of SBHP was 100% or 97.58%, respectively. After 145-VLIRD, the photocatalytic degradation rates of SBHP to MP were 1.13 times, 1.20 times, and 2.43 times higher than those of the Sm<subscript>2</subscript>NdSbO<subscript>7</subscript> photocatalyst, the BiDyO<subscript>3</subscript> photocatalyst, and the nitrogen-doped TiO<subscript>2</subscript> catalyst, respectively. The experimental results showed that SBHP had good photocatalytic activity. After four cycles of cyclic degradation experiments with SBHP, the elimination rates of MP were 98.76%, 97.44%, 96.32%, and 95.72%, respectively. The results showed that SBHP had good stability. Finally, the possible degradation pathways and degradation mechanisms of MP were speculated. In this study, we successfully developed a high-efficiency heterojunction catalyst which responded to visible light and possessed significant photocatalytic activity. The catalyst could be used in photocatalytic reaction system for eliminating the harmful organic pollutants from wastewater. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734344
- Volume :
- 14
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Catalysts (2073-4344)
- Publication Type :
- Academic Journal
- Accession number :
- 178160245
- Full Text :
- https://doi.org/10.3390/catal14060346