Markedly enhanced visible-light photocatalytic H-2 generation over g-C3N4 nanosheets decorated by robust nickel phosphide (Ni12P5) cocatalysts
Markedly enhanced visible-light photocatalytic H-2 generation over g-C3N4 nanosheets decorated by robust nickel phosphide (Ni12P5) cocatalysts
复制标题
与由坚固的磷化镍 (Ni12P5) 助催化剂修饰的 g-C3N4 纳米片相比，可见光光催化 H-2 生成显着增强
DOI：
10.1039/c6dt04575h
复制
发表时间：
2017
影响因子：
4
通讯作者：
Bi Guican
中科院分区：
文献类型：
--
作者：
Wen Jiuqing;Xie Jun;Shen Rongchen;Li Xin;Luo XingYi;Zhang Hongdan;Zhang Aiping;Bi Guican
采用简单的研磨法制备了磷化镍（Ni_（12）P_5）改性石墨碳氮化物（g-C_3 N_4）纳米片。结构表征结果表明，Ni 12 P5纳米粒子能够很好地负载在g-C3 N4纳米片的表面。在可见光照射下，通过催化水还原为氢气，测试了复合材料的光催化活性。结果表明，Ni 12 P5是一种高效的助催化剂，可用于g-C3 N4纳米片的光催化制氢。当负载量为2.0%Ni 12 P5纳米粒子时，g-C3 N4的最大光催化产氢速率为126.61 μmol g−1 h−1，是纯g-C3 N4的269.4倍。据信，g-C3 N4表面上的Ni 12 P5纳米颗粒可以充当重要的活性位点，以促进光激发的电子和空穴的分离，并加速H2-析出动力学，从而实现大大增强的氢气生成。预计这项工作将有助于进一步的实验研究，开发低成本，高效率，环境友好的g-C3 N4基纳米复合材料的光催化制氢。
In the present work, nickel phosphide (Ni12P5) modified graphitic carbon nitride (g-C3N4) nanosheets were synthesized by a simple grinding method. The structural characterization clearly proved that Ni12P5 nanoparticles were well loaded on the surface of g-C3N4 nanosheets. The photocatalytic activity of the composites was tested by catalyzing the reduction of water to hydrogen under visible light irradiation. The results demonstrate that Ni12P5 is an efficient co-catalyst for photocatalytic H2 production of g-C3N4 nanosheets. The maximum photocatalytic H2-production rate of 126.61 μmol g−1 h−1 could be obtained by loading 2.0% Ni12P5 nanoparticles on the surface of g-C3N4, which is about 269.4 times higher than that of pure g-C3N4. It is believed that Ni12P5 nanoparticles on the surface of g-C3N4 could act as significant active sites to boost separation of photoexcited electrons and holes and accelerate the H2-evolution kinetics, thus achieving greatly enhanced hydrogen generation. It is expected that this work could contribute to further experimental investigation for exploiting the low cost, high-efficiency, and environmentally friendly g-C3N4-based nanocomposites for photocatalytic H2 production.