The basic hexagonal prism was also modified to simulate a prism on which ablation of one of the six side flats had occurred. The prism tested was a 1/4-scale model of the graphite heat shield which houses the radioactive fuel for the Viking spacecraft auxiliary power supply. Graphical abstract á…Ÿ.Įxperimental static aerodynamics of a regular hexagonal prism in a low density hypervelocity flowĪ regular hexagonal prism, having a fineness ratio of 1.67, has been tested in a wind tunnel to determine its static aerodynamic characteristics in a low-density hypervelocity flow. The enhanced photocatalytic activities can be attributed to the promotion of incompletely coordinated nitrogen atom formation in the C 3 N 4 molecules. The H-C 3 N 4 catalysts displayed superior activity in the photoreduction of CO 2 with H 2 O compared to U-C 3 N 4. U-C 3 N 4 decomposition followed by hydrogen bond rearrangement of hydrolyzed products leads to the formation of a quasi- hexagonal prism-shaped structure. He, Zhiqiao Wang, Danfen Tang, Juntao Song, Shuang Chen, Jianmeng Tao, XinyongĪ quasi- hexagonal prism-shaped carbon nitride (H-C 3 N 4 ) was synthesized from urea-derived C 3 N 4 (U-C 3 N 4 ) using an alkaline hydrothermal process. A quasi- hexagonal prism-shaped carbon nitride for photoreduction of carbon dioxide under visible light.
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