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<p>In this study, cadmium sulfide/polyaniline (CdS/PANI) nanocomposites were synthesized via a hybrid preparation route that involved the hydrothermal growth of CdS nanorods followed by ultrasound-assisted polyaniline incorporation. X-ray diffraction and electron microscopy (XRD) investigations confirmed that the hexagonal crystalline phase of CdS remained stable, with homogeneous incorporation of polyaniline into the nanocomposite matrix, providing effective interface contact between the two components. Optical measurements showed absorption broadening in the visible light range and a redshift with a slight decrease in the energy gap, along with a significant decrease in the fluorescence intensity, indicating improved charge separation and reduced recombination. At the optimum ratio (0.2:0.15&#xa0;g), the composite achieved a removal efficiency of 92.7% for Rhodamine B and 93.5% for Methylene Blue within 120&#xa0;min of visible light irradiation, with high velocity constant values and shorter half-times compared to pure CdS. This work stands out by combining a dual preparation technique and a systematic component ratio optimization scheme, which enhances the catalytic performance and offers broad applicability in industrial wastewater treatment.</p>

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Synthesis and Characterization of CdS/Polyaniline Composites for Rhodamine B and Methylene Blue Dye Degradation Under Visible Light

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • A. Sh. Hussein,
  • Mohanad. Q. Fahem,
  • A. J. Ghazai,
  • Asmiet Ramizy,
  • Mohammed H. Jawad

摘要

In this study, cadmium sulfide/polyaniline (CdS/PANI) nanocomposites were synthesized via a hybrid preparation route that involved the hydrothermal growth of CdS nanorods followed by ultrasound-assisted polyaniline incorporation. X-ray diffraction and electron microscopy (XRD) investigations confirmed that the hexagonal crystalline phase of CdS remained stable, with homogeneous incorporation of polyaniline into the nanocomposite matrix, providing effective interface contact between the two components. Optical measurements showed absorption broadening in the visible light range and a redshift with a slight decrease in the energy gap, along with a significant decrease in the fluorescence intensity, indicating improved charge separation and reduced recombination. At the optimum ratio (0.2:0.15 g), the composite achieved a removal efficiency of 92.7% for Rhodamine B and 93.5% for Methylene Blue within 120 min of visible light irradiation, with high velocity constant values and shorter half-times compared to pure CdS. This work stands out by combining a dual preparation technique and a systematic component ratio optimization scheme, which enhances the catalytic performance and offers broad applicability in industrial wastewater treatment.