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首页> 外文期刊>Journal of Solid State Chemistry >C/g-C3N4 hybrid nanosheets obtained by gaseous stripping to boost photocatalytic hydrogen evolution performance
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C/g-C3N4 hybrid nanosheets obtained by gaseous stripping to boost photocatalytic hydrogen evolution performance

机译：C / G-C3N4通过气体汽提获得的杂交纳米片，以提高光催化氢进化性能

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摘要

Graphitic carbon nitride (g-C3N4) is a new generation metal-free polymer semiconductor photocatalyst for solar water splitting. In this work, we report a gaseous treatment in wet nitrogen ambience, which can realize carbon deposition and nanosheets stripping in one step. The free carbon functions as electron trapping and the bridge of g-C3N4 and co-catalyst Pt, producing a high charge separation efficiency. The carbon content in the C/g-C3N4 hybrid nanosheets can be adjusted by changing ethanol content in the treating ambience. The optimized C/g-C3N4 (5%) nanosheets achieve the highest hydrogen evolution rate of 10482.62 mu mol h(-1) g(-1), which is 2.3 times that of g-C3N4 (0%) nanosheets, even 13.9 times that of bulk g-C3N4. Optical properties, charges transfer and specific surface area of the C/g-C3N4 hybrid nanosheets are measured to discuss the mechanism of photocatalytic hydrogen evolution. The combination of high optical absorption in visible region and high charge separation efficiency contribute to the enhanced hydrogen evolution performance.
机译：石墨碳氮化物（G-C3N4）是用于太阳能分裂的新一代无金属聚合物半导体光催化剂。在这项工作中，我们在湿氮氛围中报告了气态处理，可以在一步中实现碳沉积和纳米蛋白酶剥离。游离碳用作电子捕获和G-C3N4和助催化剂PT的桥，产生高电荷分离效率。可以通过在处理环境中改变乙醇含量来调节C / G-C3N4杂交纳米片中的碳含量。优化的C / G-C3N4（5％）纳米液达到10482.62μmmolH（-1）g（-1）的最高氢进化率，这是G-C3N4（0％）纳米液的2.3倍，甚至是13.9批量G-C3N4的时间。测量C / G-C3N4杂交纳米片的光学性质，电荷转移和比表面积，以讨论光催化氢气进化的机理。可见区域中的高光学吸收和高电荷分离效率的组合有助于增强的氢进化性能。

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