研究目的
To study the role of CdO amount on the crystal structure, surface morphology, optical properties and photocatalytic efficiency of p-NiO/n-CdO nanocomposite.
研究成果
The study successfully prepared pure NiO nanoparticles and NiO-CdO nanocomposite with different amounts of CdO. The presence of CdO increased the particle size and microstrain values, reduced the energy band gap values, and improved the photocatalytic activity of the nanocomposite samples. The best photodegradation efficiency was achieved at the optimum content of CdO (0.12 wt.%).
研究不足
The study is limited to the effect of CdO content on the properties of p-NiO/n-CdO nanocomposite and its photocatalytic efficiency under specific conditions.
1：Experimental Design and Method Selection
Simple chemical precipitation method was used for the preparation of pure NiO nanoparticles and NiO-CdO nanocomposite with different content of CdO at 800 °C for 3 h.
2：Sample Selection and Data Sources
Nickel nitrate Ni (NO3)2.6H2O, Cadmium nitrate Cd (NO3)2.4H2, Potassium hydroxide KOH and methanol absolute were purchased from Sigma-Aldrich and used as received. All the aqueous solutions were prepared using distilled water.
3：List of Experimental Equipment and Materials
Shimadzu X-600, Japan (Cu Kα, λ = 0.15406 nm) for XRD measurements, SEM-JSM 6360 LA, Japan for SEM observations, Thermo Scientific Nicolet iS50 FT-IR spectrometer for FT-IR spectra, Thermo Scientific, DXR FT-RAMAN for Raman scattering spectra, UV-Vis.-NIR spectrophotometer (model UV- 3600) for UV-Visible absorption spectra.
4：Experimental Procedures and Operational Workflow
The preparation involved dissolving nickel nitrate in distilled water, adding potassium hydroxide as a precipitating agent, filtering and washing the obtained precipitate, drying overnight at 100 °C, and calcination at 800 °C for 3h. The same procedure was followed for nanocomposite samples with varying CdO content.
5：Data Analysis Methods
XRD, SEM, EDX, Raman, FTIR, and UV-Visible spectra were used to investigate the influence of CdO content on the structure, morphology, elemental composition, function groups and optical properties of the prepared samples.
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