研究目的
Investigating the synergistic effect of hydrochloric acid and phytic acid doping on polyaniline-coupled g-C3N4 nanosheets for photocatalytic Cr(VI) reduction and dye degradation.
研究成果
The PANI/g-C3N4 sample demonstrated outstanding photocatalytic activity for Cr(VI) removal, attributed to the interchain and intrachain doping of PA and HCl over PANI, creating a 3D connected network and synergistically increasing the electrical conductivity. This study provides new insights into the design of g-C3N4-based compounds for efficient photocatalytic reactions.
研究不足
The technical and application constraints of the experiments, as well as potential areas for optimization, are not explicitly mentioned in the abstract.
1：Experimental Design and Method Selection
In situ polymerization for the preparation of the HCl-/PA-codoped PANI/CNns with a 3D hierarchical structure.
2：Sample Selection and Data Sources
Graphitic CN was prepared by heating dicyandiamide at 550 °C for 2 h. CNns were obtained through thermal etching by carefully grinding and heating CN at 550 °C for 2 h.
3：List of Experimental Equipment and Materials
Dicyandiamide (99%, Alfa Aesar, USA), PA (50% (w/w) in H2O, Sigma-Aldrich, Germany), HCl (Alfa Aesar, USA), aniline (99%, Alfa Aesar, USA), ammonium persulfate (98%, Alfa Aesar, USA).
4：Experimental Procedures and Operational Workflow
PA and aniline were suspended in deionized water and then added to CNns to form a homogeneous suspension. A hydrochloric acid solution was then added to the suspension and stirred vigorously for at least 1 h. After cooling, ammonium persulfate was added as an oxidizing agent until the suspension became dark green.
5：Data Analysis Methods
X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), N2 adsorption?desorption isotherms, thermogravimetric analysis (TGA), diffuse reflectance spectroscopic analysis, electron paramagnetic resonance (EPR) spectroscopy, photoluminescence (PL) spectra, electric resistivity measurement, electrochemical impedance spectroscopy (EIS).
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