Abstract
A new approach was used to prepare a hybrid material of silver chloride nanoparticles incorporated into a polyaniline-grafted D-dextrose nanocomposite (AgClNPs/PANI/D-Dex) by an interfacial polymerization method. The AgClNPs/PANI/D-Dex nanocomposite was characterized with distinct instrumental methods such as Fourier Transform Infrared Spectroscopy (FT-IR), UV–visible Spectroscopy (UV–Vis), Fluorescence spectroscopy, X-ray Powder Diffraction (XRD), Raman spectroscopy, Thermal Gravimetric Analysis (TGA), Zeta sizer analyzer, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV). This nanocomposite was used in the catalytic reduction of 4-nitrophenol (4-NP) with NaBH4 as the reducing agent and photocatalytic degradation of methylene blue (MB) under visible light irradiation. The catalytic reduction of 4-NP was also investigated with different catalyst dosages of the AgClNPs/PANI/D-Dex nanocomposite. This nanocomposite proved to be an excellent catalyst for the reduction of 4-NP to 4-AP with a reaction rate of 0.365 min−1. The AgClNPs/PANI/D-Dex nanocomposite catalyst was additionally reused for the reduction of 4-NP after four cycles. AgClNPs/PANI/D-Dex nanocomposite was also applied as a photocatalyst for the degradation of MB under visible light irradiation. The extent of photocatalytic degradation of MB was determined as a function of various parameters such as dosage, pH of MB solution and different initial concentrations of MB solution under visible light irradiation. This hybrid AgClNPs/PANI/D-Dex nanocomposite enhanced the electron-hole separation, provided a high surface area and improved the photocatalytic activity under visible light irradiation because of the synergetic effect of AgClNPs and PANI/D-Dex to enhance the photocatalytic reaction with a reaction rate constant of 0.0298 min−1. Further, the fluorescence quenching for calculated the binding interaction between MB dye and AgClNPs/PANI/D-Dex nanocomposite was also studied. The binding interaction constant (Ka) was calculated by using the Stern–Volmer equation. Finally, AgClNPs/PANI/D-Dex nanocomposite exhibited good catalytic and photocatalytic properties.
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