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SEM images of TiO 2 ai, CuWO 4 aii and CuWO 4 @400 °C aiii; and TEM of TiO 2 bi, CuWO 4 @400 °C bii and CuWO 4 -TiO 2 biii nanoflakes
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The study presents a breakthrough of a balanced charge separation for heterojunction CuWO4-TiO2 cocatalyst to efficiently enhance visible light photocatalytic degradation of ciprofloxacin (CIP). A solvothermal-synthesized nanopyramid-like CuWO4 semiconductor was assembled before sol–gel treatment with TiO2 precursors to generate CuWO4-TiO2 nanocomp...
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... spectra displayed in Fig. 2c-d represent the phase purity of TiO 2 , CuWO 4 , and CuWO 4 -TiO 2 . TiO 2 samples in Fig. 3c showed the Raman modes: E g1 (at 146.9 cm −1 ) , B 1g (at 399.99 cm −1 ), A 1g (at 519 cm −1 ) and E g (at 640.12 cm −1 ). These TiO 2 bands were previously identified at lower wavenumbers of 141, 390, 512, and 634 cm −1 ( Luo et al. 2016). The redshift to a higher wavelength in the current work is due to nitriding. The E g1 band ...
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... investigations of TiO 2 , CuWO 4 , and CuWO 4 -TiO 2 are given from SEM in Fig. 3ai-aiii and TEM in Fig. 3bi-biii. Figure 3bi shows agglomerated cubic-shaped structures consistent with a tetragonal phase revealed from XRD phase analysis. The SEM images from Fig. 3ai and aii revealed that CuWO 4 -MOFs formed a pyramid-like structure. In our research institute, a previous study by Abera et al. (Ambaye et al. 2022) ...
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... investigations of TiO 2 , CuWO 4 , and CuWO 4 -TiO 2 are given from SEM in Fig. 3ai-aiii and TEM in Fig. 3bi-biii. Figure 3bi shows agglomerated cubic-shaped structures consistent with a tetragonal phase revealed from XRD phase analysis. The SEM images from Fig. 3ai and aii revealed that CuWO 4 -MOFs formed a pyramid-like structure. In our research institute, a previous study by Abera et al. (Ambaye et al. 2022) showed that a pyramid-like ...
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... investigations of TiO 2 , CuWO 4 , and CuWO 4 -TiO 2 are given from SEM in Fig. 3ai-aiii and TEM in Fig. 3bi-biii. Figure 3bi shows agglomerated cubic-shaped structures consistent with a tetragonal phase revealed from XRD phase analysis. The SEM images from Fig. 3ai and aii revealed that CuWO 4 -MOFs formed a pyramid-like structure. ...
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... investigations of TiO 2 , CuWO 4 , and CuWO 4 -TiO 2 are given from SEM in Fig. 3ai-aiii and TEM in Fig. 3bi-biii. Figure 3bi shows agglomerated cubic-shaped structures consistent with a tetragonal phase revealed from XRD phase analysis. The SEM images from Fig. 3ai and aii revealed that CuWO 4 -MOFs formed a pyramid-like structure. In our research institute, a previous study by Abera et al. (Ambaye et al. 2022) showed that a pyramid-like shape emanates from solvothermal synthesis using Cu precursors and trimeric acid which forms ultimately octahedral Cu-MOF with a flake-like/ paddle-wheel-like ...
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... et al. 2022) showed that a pyramid-like shape emanates from solvothermal synthesis using Cu precursors and trimeric acid which forms ultimately octahedral Cu-MOF with a flake-like/ paddle-wheel-like geometry. The current study reveals that the flake-like/paddles represent a collapse of nanopyramidal Cu-MOF at elevated temperatures as indicated in Fig. 3bii TEM after sintering CuWO 4 at 400 °C for 2 h. The pyramid-like shape concurs with XRD analysis that CuWO 4 is a triclinic phase. XRD Gaussian model correlation to the triclinic phase suggests that even the stacked flower-like structures from Fig. 3ai inset represent a triclinic phase in a bipyramid crystal. This is further supported by ...
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... represent a collapse of nanopyramidal Cu-MOF at elevated temperatures as indicated in Fig. 3bii TEM after sintering CuWO 4 at 400 °C for 2 h. The pyramid-like shape concurs with XRD analysis that CuWO 4 is a triclinic phase. XRD Gaussian model correlation to the triclinic phase suggests that even the stacked flower-like structures from Fig. 3ai inset represent a triclinic phase in a bipyramid crystal. This is further supported by previous revelations (Feng et al. 2017) that hydrothermal synthesis of MOF performed below 18 h usually produces a mixture of pyramid-like particles and other shapes such as nanotubes. Hence, CuWO 4 -MOF crystals earned the name CuWO 4 nanopyramids ...
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... This is further supported by previous revelations (Feng et al. 2017) that hydrothermal synthesis of MOF performed below 18 h usually produces a mixture of pyramid-like particles and other shapes such as nanotubes. Hence, CuWO 4 -MOF crystals earned the name CuWO 4 nanopyramids in this current work. TEM micrographs of CuWO 4 -TiO 2 composite in Fig. 3biii ...
