Hydrothermal Preparation of Multiwalled Carbon Nanotubes (MWCNTs)/CdS Nanocomposite and Its Efficient Photocatalytic Hydrogen Production under Visible Light Irradiation
Hydrothermal Preparation of Multiwalled Carbon Nanotubes (MWCNTs)/CdS Nanocomposite and Its Efficient Photocatalytic Hydrogen Production under Visible Light Irradiation
复制标题
多壁碳纳米管（MWCNTs）/CdS纳米复合材料的水热制备及其可见光照射下高效光催化制氢
DOI：
10.1021/ef200369z
复制
发表时间：
2011-05-01
期刊：
影响因子：
5.3
通讯作者：
Zhang, Xiaohu
中科院分区：
文献类型：
--
作者：
Peng, Tianyou;Zeng, Peng;Zhang, Xiaohu
采用水热法在功能化的多壁碳纳米管表面直接生长硫化镉纳米颗粒，制备了不同含量的多壁碳纳米管/硫化镉纳米复合材料。在可见光(波长420 nm)照射下，对比研究了水热温度和MWCNT含量对制氢光催化活性的影响。结果表明，10wt%的MWCNTs/CDS比纯的CDS纳米粒子具有更高的光催化产氢效率和光稳定性。纳米复合材料的光活性显著提高归因于其组分的固有性质的协同效应，如修饰后的MWCNT和CDS纳米颗粒之间的良好电荷转移和分离，这是由于水热过程中CDS纳米颗粒直接生长在MWCNT表面所致。目前的MWCNTs/CDS纳米复合材料表现出明显的优势，如提高了CDS的可见光驱动光活性和光稳定性，用于制氢。
Multiwalled carbon nanotubes (MWCNTs)/CdS nanocomposites containing different MWCNT contents were synthesized hydrothermally via direct growth of CdS nanoparticles on the functionalized MWCNT surface. The effects of the hydrothermal temperature and MWCNT content in the nanocomposites on the photoactivity for hydrogen production were investigated comparatively under visible light (lambda >= 420 nm) irradiation. It was found that 10 wt % MWCNTs/CdS showed much higher photocatalytic hydrogen production efficiency and photostability than the pure CdS nanoparticles. The significantly enhanced photoactivity of the nanocomposite was attributed to the synergetic effect of the intrinsic properties of its components, such as excellent charge transfer and separation on the interfaces between the modified MWCNTs and CdS nanoparticles, resulting from the direct growth of CdS nanoparticles on the MWCNT surface during the hydrothermal process. The present MWCNTs/CdS nanocomposite reveals obvious predominance, such as enhanced visible-light-driven photoactivity and photostability of CdS for hydrogen production.