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Simple one-pot, high-yield synthesis of 2D graphitic carbon nitride nanosheets for photocatalytic hydrogen production
Dalton Transactions ( IF 4 ) Pub Date : 2022-11-24 , DOI: 10.1039/d2dt03272d
Ziwei Ye 1, 2 , Wenhui Yue 1, 2 , Muhammad Tayyab 1, 2 , Jungang Zhang 1, 2 , Jinlong Zhang 1, 2
Affiliation  

2-Dimensional (2D) graphitic carbon nitrate (g-C3N4) nanosheets are particularly interesting photocatalytic materials because of their large surface area and excellent photoelectric properties. However, it remains challenging to synthesize 2D g-C3N4 nanosheets with high yield and high activity simultaneously. In this work, a urea-assisted one-pot method was developed in which the decomposition of urea released NH3 gas which exfoliated bulk g-C3N4 into thin nanosheets and generated pores and wrinkles on their surface. The product g-C3N4 nanosheets therefore possessed abundant surface active sites for interaction with reactants and showed enhanced light utilization efficiency, giving rise to their improved hydrogen production activity which was 3.36 times higher than that of their bulk counterpart. Importantly, the yield of g-C3N4 nanosheets using this method was almost doubled compared to a previously reported ammonium chloride (NH4Cl) assisted method. Given that g-C3N4 nanosheets are building blocks for various photocatalysts, the current synthetic method which produces g-C3N4 nanosheets with high yield and high activity shall pave the way for high-performance photocatalytic applications such as hydrogen production and more.

中文翻译:

用于光催化制氢的二维石墨氮化碳纳米片的简单一锅法、高产率合成

二维 (2D) 石墨硝酸碳 (gC 3 N 4 ) 纳米片是特别有趣的光催化材料,因为它们具有大表面积和优异的光电性能。然而,同时高产率和高活性地合成2D gC 3 N 4纳米片仍然具有挑战性。在这项工作中,开发了一种尿素辅助的一锅法,其中尿素的分解释放出 NH 3气体,该气体将块状 gC 3 N 4剥离成薄的纳米片并在其表面产生孔隙和皱纹。产物 gC 3 N 4因此,纳米片具有丰富的与反应物相互作用的表面活性位点,并显示出更高的光利用效率,从而提高了它们的产氢活性,是其本体对应物的 3.36 倍。重要的是,与之前报道的氯化铵 (NH 4 Cl) 辅助方法相比,使用该方法的 gC 3 N 4纳米片的产量几乎翻了一番。鉴于 gC 3 N 4纳米片是各种光催化剂的构建单元,目前生产 gC 3 N 4的合成方法高产率和高活性的纳米片将为制氢等高性能光催化应用铺平道路。
更新日期:2022-11-29
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