Synthesis of Titanium Dioxide/Cadmium Sulfide Nanosphere Particles for Photocatalyst Applications

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• 作者：Thi Thuy Duong Vu ; Frej Mighri ; Abdellah Ajji ; Trong-On Do
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：March 12, 2014
• 年：2014
• 卷：53
• 期：10
• 页码：3888-3897
• 全文大小：611K
• 年卷期：v.53,no.10(March 12, 2014)
• ISSN：1520-5045

文摘

Semiconductor nanocomposites, which are composed of titanium dioxide (TiO₂) nanorods, cadmium sulphide (CdS) nanoparticles (NPs), and Ni clusters, were synthesized. The following steps were adopted: (i) surfactant-capped TiO₂ nanorods with controlled length were synthesized in an autoclave using oleic acid and amino hexanoic acid as surfactants. By using a ligand-exchange procedure, in which nitrosonium tetrafluoroborate (NOBF₄) was used to replace the original surfactants, hydrophilic NOBF₄鈥揟iO₂ nanorods were obtained; (ii) the resulting nanorods were deposited with CdS NPs and (iii) then deposited selectively with Ni clusters (as cocatalyst) on the nanocomposite surface. Under visible-light illumination of the nanocomposite, the generated electrons from the conduction band of CdS are transferred to TiO₂ via TiO₂/CdS interface, then to metallic Ni cluster. As a result, the electron鈥揾ole separation was highly enhanced, leading to a Ni鈥揟iO₂/CdS nanocomposite with high photocatalytic performance for the production of hydrogen (H₂).