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首页> 外文期刊>Catalysis science & technology >Amorphous Co3S4 nanoparticle-modified tubular g-C3N4 forms step-scheme heterojunctions for photocatalytic hydrogen production
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Amorphous Co3S4 nanoparticle-modified tubular g-C3N4 forms step-scheme heterojunctions for photocatalytic hydrogen production

机译：非晶态Co3S4 nanoparticle-modified管g-C3N4形式step-scheme垂直光催化制氢

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摘要

An effective method to reduce the recombination rate of photogenerated electron-hole pairs was developed by the construction of heterojunctions with rationally designed photocatalysts having a matched band structure. Herein, g-C3N4 hexagonal tubes possessing a lower conduction band were coupled with Co3S4 ultra-fine nanoparticles having relatively higher positions for their conduction band. A step-scheme heterojunction was constructed between these two materials, and through this heterojunction, the spatial charge separation was boosted. The boosted spatial charge separation led to more useful electrons with a higher reduction ability that participated in a photocatalytic H-2 evolution reaction. The Co3S4 ultra-fine nanoparticles act as a mirror to repeatedly scatter and reflect incident light and thus enhance light utilization, and they also accelerate the spatial charge separation. The photocatalytic H-2 evolution activity of the composite catalyst reached 2120 mu mol g(-1) h(-1), which was 176 times higher than that of pristine g-C3N4 tubes. A series of characteristics were determined to investigate the interaction that occurred between the g-C3N4 hexagonal tubes and the Co3S4 ultra-fine nanoparticles, and to study the mechanism of the formed step-scheme. This work will guide the design of step-scheme heterojunction-based photocatalysts to produce H-2 from photocatalytic water splitting.
机译：一种有效的方法来减少重组率photogenerated电子空穴对由垂直的建设催化剂有了合理的设计匹配的能带结构。管拥有较低的导带再加上Co3S4超细纳米颗粒在相对更高的职位的导带。这两个材料建造通过这种异质结,空间电荷分离了。电荷分离导致了更有用的电子降低高参与的能力在光催化反应,氢进化。Co3S4超细纳米颗粒作为镜子多次散射和反射入射光和从而提高光的利用率,和他们也加快空间电荷分离。光催化氢进化的活动复合催化剂达到2120亩摩尔g (1)h(1)高出176倍原始g-C3N4管。特点是决定进行调查g-C3N4之间发生的相互作用六角管和Co3S4超细纳米粒子,并研究的机制step-scheme形成的。设计step-scheme heterojunction-based论文从光催化产生2水分裂。

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