Natural reed-derived nanostructure SiC/CNOs for photocatalytic hydrogen evolution from water

SiC Substrate/Pt Nanoparticle/Graphene Nanosheet Composite Photocatalysts for Hydrogen Generation

“…Figure e shows a comparison of the photocatalytic activity of SiC-based photocatalytic materials. First, the rate of pristine SiC photocatalyst’s hydrogen production was in the range of 2.68–11 μmol·g –1 ·h –1 , owing to the lack of active sites and the high recombination of charge–hole pairs of the pristine SiC photocatalyst. ,,, By doping SiC with the noble metal Pt, the hydrogen production rate has boosted at 204 μmol·g –1 ·h –1 . − Furthermore, by doping SiC with carbon materials, for instance, carbon nanowires, carbon nanotubes, graphene, carbon black, etc., the hydrogen production rate has sharply improved to 1328.4 μmol·g –1 ·h –1 . ,,,− In recent years, the hot photocatalytic material graphitic carbon nitride (g-C 3 N 4 ) and SiC form a composite photocatalyst, which can reach a hydrogen production rate of 595.3–2971 μmol·g –1 ·h –1 . − In the present work, SiC/Pt/graphene composite photocatalysts with stabilized heterojunctions between β-SiC, graphene, and Pt were prepared using the FJH process. Compared with the photocatalytic activity of pristine SiC, the SiC/Pt/graphene composite photocatalyst had a 175-fold increase achieving the maximum value of 2980 μmol·g –1 ·h –1 .…”

A Simple Highly Efficient Catalyst with NiOX‐loaded Reed‐based SiC/CNOs for Hydrogen Production by Photocatalytic Water‐splitting

“…[20] The broad peaks at 25.8°and 43.7°indicate the disordered structure of CNOs. [35] CNOs are composed of concentric fullerene carbon shells with high defects, high conductivity, high curvature, chemical stability, and so on. [36] The UV-Vis absorption spectra span of CNOs is from infrared to ultraviolet, which provides abundant active sites for photo-catalytic reactions.…”

“…Compared with other carbon nanomaterials, CNOs have considerable potential photoelectron chemical material as capture centers to quench the recombination of electron-hole pairs. [35,37,38] Figure 1(B) is the infrared spectrum of 0.1 %-2.0 % NiO X /SiC/CNOs, 1.0 % NiO X /AC, and SiC/CNOs. It can be observed that there is a characteristic peak at 800 cm À 1 , [39,40] which is due to the tensile characteristic peak of the SiÀ C bond in SiC.…”

“…The reed powder was placed into the quartz boat and heated in a muffle furnace at 500 °C for 2 h with atmosphere; The AC was heated to 1400 °C for 2 h under Ar protection, and SiC/ CNOs were obtained. [35]…”

“…The SiC/CNOs have been prepared by simple sintering in our lab only using the single reed. [35] In the study, NiO x is deposited on SiC/CNOs to form a NiO X /SiC/CNOs complex catalyst, which greatly improves the catalytic efficiency.…”