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Surfactant-Free and Controlled Synthesis of Hexagonal CeVO4 Nanoplates: Photocatalytic Activity and Superhydrophobic Property.

Yang X, Zuo W, Li F, Li T - ChemistryOpen (2015)

Bottom Line: During synthesis, solution pH, and reaction temperature were found to play important roles in determining the growth process and final morphologies of the CeVO4 products.The largest CA measured was at 169.5 ° for a glass substrate treated with 0.06 g mL(-1) CeVO4 followed by 2 % 1 H, 1 H, 2 H, 2 H-perfluorodecyltriethoxysilane.Finally, the CeVO4 nanoplates exhibited excellent photocatalytic activity in degradation of rhodamine B (RhB) under UV irradiation and was stable even after repeated cycles of use.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry, Key Lab of Environment Friendly Chemistry and Application of the Ministry of Education, Xiangtan University Xiangtan, 411105, P. R. China.

ABSTRACT
Nanomaterials with both superhydrophobic surface properties as well as photocatalytic activities could have important industrial applications. Herein, we synthesized CeVO4 nanocrystals with hexagonal nanoplate structures from the reaction of decavanadate (K6V10O28⋅9 H2O) and CeCl3⋅H2O precursors via a hydrothermal method. This synthetic route has four advantages: 1) the reaction condition is relatively mild, 2) it doesn't need surfactants or templates, 3) it requires no expensive equipment, and 4) products are of higher purity. During synthesis, solution pH, and reaction temperature were found to play important roles in determining the growth process and final morphologies of the CeVO4 products. These products were characterized spectrophotometrically and via scanning and transmission electron microscopy. Furthermore, the wettability of the as-synthesized film CeVO4 nanoplates was studied by measuring water contact angle (CA). The largest CA measured was at 169.5 ° for a glass substrate treated with 0.06 g mL(-1) CeVO4 followed by 2 % 1 H, 1 H, 2 H, 2 H-perfluorodecyltriethoxysilane. Finally, the CeVO4 nanoplates exhibited excellent photocatalytic activity in degradation of rhodamine B (RhB) under UV irradiation and was stable even after repeated cycles of use.

No MeSH data available.


X-ray diffraction patterns of CeVO4 nanocrystals obtained A) at 140 °C, with varying pH: pH 5 (a), pH 7 (b), pH 9 (c), and pH 11 (d) and B) at pH 9, with varying reaction temperatures: rt (a), 120 °C (b), 140 °C (c), and 160 °C (d).
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fig01: X-ray diffraction patterns of CeVO4 nanocrystals obtained A) at 140 °C, with varying pH: pH 5 (a), pH 7 (b), pH 9 (c), and pH 11 (d) and B) at pH 9, with varying reaction temperatures: rt (a), 120 °C (b), 140 °C (c), and 160 °C (d).

Mentions: Figure 1 A shows the X-ray diffraction (XRD) patterns of the products obtained via hydrothermal method at different pH values. The products synthesized at pH values of 5, 7, and 9 show similar patterns, which can be indexed as the tetragonal zircon phase of CeVO4 (space group: I41/amd) with cell constants a=b=7.399 Å and c=6.496 Å, which are in good agreement with the standard values for the tetragonal phase CeVO4 (Joint Committee on Powder Diffraction Standards (JCPDS) No. 12-0757). However, the peaks for CeO2 were also observed at pH 11. All peaks of the product are broadened because of the small size of the crystals. Obviously, the pH of the solution plays an important role in the preparation of pure CeVO4 via hydrothermal method, indicating the existence of somewhat preferential orientations in the CeVO4 nanocrystals. From Figure 1 A, we can observe that the crystallinity of the product is optimal at pH 9.


Surfactant-Free and Controlled Synthesis of Hexagonal CeVO4 Nanoplates: Photocatalytic Activity and Superhydrophobic Property.

Yang X, Zuo W, Li F, Li T - ChemistryOpen (2015)

X-ray diffraction patterns of CeVO4 nanocrystals obtained A) at 140 °C, with varying pH: pH 5 (a), pH 7 (b), pH 9 (c), and pH 11 (d) and B) at pH 9, with varying reaction temperatures: rt (a), 120 °C (b), 140 °C (c), and 160 °C (d).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4522178&req=5

fig01: X-ray diffraction patterns of CeVO4 nanocrystals obtained A) at 140 °C, with varying pH: pH 5 (a), pH 7 (b), pH 9 (c), and pH 11 (d) and B) at pH 9, with varying reaction temperatures: rt (a), 120 °C (b), 140 °C (c), and 160 °C (d).
Mentions: Figure 1 A shows the X-ray diffraction (XRD) patterns of the products obtained via hydrothermal method at different pH values. The products synthesized at pH values of 5, 7, and 9 show similar patterns, which can be indexed as the tetragonal zircon phase of CeVO4 (space group: I41/amd) with cell constants a=b=7.399 Å and c=6.496 Å, which are in good agreement with the standard values for the tetragonal phase CeVO4 (Joint Committee on Powder Diffraction Standards (JCPDS) No. 12-0757). However, the peaks for CeO2 were also observed at pH 11. All peaks of the product are broadened because of the small size of the crystals. Obviously, the pH of the solution plays an important role in the preparation of pure CeVO4 via hydrothermal method, indicating the existence of somewhat preferential orientations in the CeVO4 nanocrystals. From Figure 1 A, we can observe that the crystallinity of the product is optimal at pH 9.

Bottom Line: During synthesis, solution pH, and reaction temperature were found to play important roles in determining the growth process and final morphologies of the CeVO4 products.The largest CA measured was at 169.5 ° for a glass substrate treated with 0.06 g mL(-1) CeVO4 followed by 2 % 1 H, 1 H, 2 H, 2 H-perfluorodecyltriethoxysilane.Finally, the CeVO4 nanoplates exhibited excellent photocatalytic activity in degradation of rhodamine B (RhB) under UV irradiation and was stable even after repeated cycles of use.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry, Key Lab of Environment Friendly Chemistry and Application of the Ministry of Education, Xiangtan University Xiangtan, 411105, P. R. China.

ABSTRACT
Nanomaterials with both superhydrophobic surface properties as well as photocatalytic activities could have important industrial applications. Herein, we synthesized CeVO4 nanocrystals with hexagonal nanoplate structures from the reaction of decavanadate (K6V10O28⋅9 H2O) and CeCl3⋅H2O precursors via a hydrothermal method. This synthetic route has four advantages: 1) the reaction condition is relatively mild, 2) it doesn't need surfactants or templates, 3) it requires no expensive equipment, and 4) products are of higher purity. During synthesis, solution pH, and reaction temperature were found to play important roles in determining the growth process and final morphologies of the CeVO4 products. These products were characterized spectrophotometrically and via scanning and transmission electron microscopy. Furthermore, the wettability of the as-synthesized film CeVO4 nanoplates was studied by measuring water contact angle (CA). The largest CA measured was at 169.5 ° for a glass substrate treated with 0.06 g mL(-1) CeVO4 followed by 2 % 1 H, 1 H, 2 H, 2 H-perfluorodecyltriethoxysilane. Finally, the CeVO4 nanoplates exhibited excellent photocatalytic activity in degradation of rhodamine B (RhB) under UV irradiation and was stable even after repeated cycles of use.

No MeSH data available.