Preparation of highly crystalline inverse opal g-C3N4 by co-deposition and analysis of its hydrogen production performance
To obtain g-C3N4 with excellent photocatalytic hydrogen production activity,in this paper,highly crystalline inverse opal-structured g-C3N4 was prepared by co-deposition of silica microspheres/cyanamide in their mixed dispersion.The structure and morphology were analyzed by scanning electron microscopy,X-ray diffraction,infrared spectroscopy,and specific surface area and pore size analysis;the photocatalytic hydrogen production performance was tested by gas chromatography.The results show the interlayer spacing of highly crystalline inverse opal-structured g-C3N4(CN5500-70％)reaches 3.23 Å and the specific surface area reaches 32 m2/g when the centrifugation rate is set at 5500 r/min and the mass fraction of cyanamide solution is 70％.The photocatalytic hydrogen production property is significantly improved with a hydrogen production rate of 7217.01 μmol/(g·h).The highly crystalline inverse opal-structured g-C3N4 prepared in this paper has good crystallinity and excellent photocatalytic activity simultaneously,which can provide useful reference for the practical application of g-C3N4-based catalytic materials.
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