Effect of CdS shell thickness on the photocatalytic properties of TiO2@CdS core–shell nanorod arrays

  • Zhu Shi
  • Jiani Liu
  • Huixia Lan
  • Xiuyan LiEmail author
  • Bangyao Zhu
  • Jinghai Yang


Rutile TiO2 nanorod arrays (NRAs) with average diameter approximately 80 nm were first synthesized by solvothermal method using Ti foil as both titanium source and substrate. And then TiO2@CdS core–shell heterostructure NRAs were fabricated via subsequent successive ionic layer adsorption and reaction (SILAR) route using the TiO2 NRAs as precursor. The thicknesses of CdS shell varied from 4 to 18 nm by changing the times of SILAR cycle. The photocatalytic performances of pure TiO2 and all TiO2@CdS NRAs were investigated on the degradation of rhodamine B (RhB) aqueous solution under simulated sunlight irradiation. Compared to pure TiO2 NRAs, all TiO2@CdS NRAs displayed superior photocatalytic activities, and the optimal CdS shell thickness of TiO2@CdS NRAs was about 11 nm. A possible Z-scheme electron transfer mechanism for TiO2@CdS NRAs nanocomposite with the enhanced photocatalytic performance was provided.



This work is supported by the National Natural Science Foundation of China (Grant No. 61378085) and the Thirteenth Five-Year Program for Science and Technology of Education Department of Jilin Province (Item No. JJKH20191017KJ).

Supplementary material

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Supplementary material 1 (DOC 2159 kb)


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Authors and Affiliations

  1. 1.Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchunPeople’s Republic of China
  2. 2.College of Environment and Safe EngineeringQingdao University of Science & TechnologyQingdaoPeople’s Republic of China
  3. 3.Department of Tourism and GeographyJilin Normal UniversitySipingPeople’s Republic of China

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