Bio-inspired Z-scheme g-C(3)N(4)/Ag(2)CrO(4) for efficient visible-light photocatalytic hydrogen generation.
Bio-inspired Z-scheme g-C(3)N(4)/Ag(2)CrO(4) for efficient visible-light photocatalytic hydrogen generation.
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DOI：
10.1038/s41598-018-34287-w
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发表时间：
2018-11-07
影响因子：
4.6
通讯作者：
Liu Z
中科院分区：
文献类型：
--
作者：
Che Y;Lu B;Qi Q;Chang H;Zhai J;Wang K;Liu Z
由于电荷分离效率低、稳定性差，单组分光催化剂如石墨氮化碳（g-C3N4）和铬酸银（Ag2CrO4）通常很难高效地实现光催化制氢。模拟自然界光合作用的Z型电荷传输机制是解决上述问题的有效途径。受光合作用的启发，我们报道了 Ag2CrO4 纳米粒子装饰的 g-C3N4 纳米片作为一种有效的光催化剂，用于以甲醇为牺牲剂的析氢反应 (HER)。 Z型g-C3N4/Ag2CrO4纳米片光催化剂的形成可以抑制光生电子-空穴对的复合，促进光解水产生氢气。实验结果表明，g-C3N4/Ag2CrO4 纳米复合材料在水分解产氢过程中表现出增强的光催化活性和稳定性。纳米复合材料g-C3N4/Ag2CrO4(23.1%)的HER效率是裸g-C3N4的14倍。
Due to low charge separation efficiency and poor stability, it is usually difficult for single-component photocatalysts such as graphitic carbon nitride (g-C3N4) and silver chromate (Ag2CrO4) to fulfill photocatalytic hydrogen production efficiently. Z-scheme charge transport mechanism that mimics the photosynthesis in nature is an effective way to solve the above problems. Inspired by photosynthesis, we report Ag2CrO4 nanoparticles-decorated g-C3N4 nanosheet as an efficient photocatalyst for hydrogen evolution reaction (HER) with methanol as sacrificial agent. The formation of Z-scheme g-C3N4/Ag2CrO4 nanosheets photocatalysts could inhibit the recombination of photogenerated electron-hole pairs, promote the generation of hydrogen by photosplitting of water. The experiment results indicate that g-C3N4/Ag2CrO4 nanocomposites present enhanced photocatalytic activity and stability in the H2 evolution of water splitting. And the nanocomposites g-C3N4/Ag2CrO4(23.1%) show the 14 times HER efficiency compared to that of bare g-C3N4.
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