Carbon encapsulation strategy of Ni co-catalyst: Highly efficient and stable Ni@C/CdS nanocomposite photocatalyst for hydrogen production under visible light
Carbon encapsulation strategy of Ni co-catalyst: Highly efficient and stable Ni@C/CdS nanocomposite photocatalyst for hydrogen production under visible light
复制标题
Ni助催化剂的碳包封策略：高效稳定的Ni@C/CdS纳米复合光催化剂用于可见光制氢
DOI：
10.1016/j.jcat.2013.03.026
复制
发表时间：
2013-07-01
影响因子：
7.3
通讯作者：
Li, Xingguo
中科院分区：
文献类型：
--
作者：
Peng, Tianyou;Zhang, Xiaohu;Li, Xingguo
以预先制备的Ni@C为原料，采用简单的溶剂热法，将Ni共催化剂的碳包覆策略应用于制备高效率、稳定性好的新型碳包覆Ni (Ni@C)/CdS纳米复合光催化剂。结果表明，包裹在类石墨碳壳中的金属Ni纳米颗粒具有较高的化学稳定性和热稳定性，所得Ni@C/CdS纳米复合材料在420 nm单色光照射下，5 h的平均光催化产氢活性为622.7 μ mol h(-1)，表观量子产率高达约20.5%。Ni@C中的金属Ni作为助催化剂，类石墨碳作为CdS纳米粒子的载体和电子受体，使得CdS纳米粒子具有高效的电荷分离，从而提高了生成H-2的光活性和稳定性。本文提出的新型镍共催化剂碳包封策略为制备具有优良光活性和稳定性的新型廉价光催化剂提供了思路。(c) 2013爱思唯尔公司版权所有。
Carbon encapsulation strategy of Ni co-catalyst is applied to the fabrication of novel carbon-coated Ni (Ni@C)/CdS nanocomposite photocatalyst with high efficiency and good stability via a facile solvothermal process by using a pre-prepared Ni@C as a starting material. It is found that the metallic Ni nanoparticles encapsulated in the graphite-like carbon shells show a high chemical and thermal stability, and the resultant Ni@C/CdS nanocomposite shows an average photocatalytic H-2-production activity of 622.7 mu mol h(-1) during 5-h visible-light irradiation and an apparent quantum yield up to ca. 20.5% under 420 nm monochromatic light irradiation. The metallic Ni in Ni@C acted as co-catalyst while the graphite-like carbon as CdS nanoparticles' support and electron acceptor, which resulting in the efficient charge separation, and then the enhanced photoactivity and stability for H-2 production as compared to the pristine CdS nanoparticles. The present novel carbon encapsulation strategy of Ni co-catalyst can shed light on the fabrication of new cheap photocatalyst with excellent photoactivity and stability for H-2 production. (c) 2013 Elsevier Inc. All rights reserved.