Journal of Materials Science

, Volume 49, Issue 3, pp 1336–1344 | Cite as

Shifting mechanisms in the initial stage of dye photodegradation by hollow TiO2 nanospheres

  • Bing Wang
  • Chuang Li
  • Hao Cui
  • Jin Zhang
  • Jianping Zhai
  • Qin Li


Hollow TiO2 (HT) sphere aggregates were prepared using carbon spheres as templates. The photocatalytic activity of HT was determined by degradation of two nitrogen-containing dyes, methylene blue (MB) and methyl orange (MO). The adsorption isotherms and the photocatalytic degradation kinetics of the two dyes were studied and compared using different concentrations of dyes for the pure, isopropanol-added, and KI-added systems. Isopropanol was used as a OH radical scavenger, while KI was added as a valance band hole scavenger. The results showed that the reaction mechanism of the photocatalytic process of MB was first governed by OH radicals, and then by valence band holes, whereas holes played a major role in the whole photodegradation process of MO. The photocatalytic adsorption constant K V has a positive correlation with the reaction constant k ov in all systems. The photodegradation efficiencies of the dyes were discussed considering the surface characteristics of HT and the structure of the dyes with different catalyst loads (0.25–2 g L−1) and under different pH (3–10) conditions. Compared with solid TiO2, HT exhibited enhanced performance in photocatalytic degradation of both MB and MO.


Methylene Blue Total Organic Content Photocatalytic Activity Photocatalytic Degradation Methyl Orange 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors gratefully acknowledge financial support from the Foundation of State Key Laboratory of Pollution Control and Resource Reuse of China, the Natural Science Foundation of China (No. 51008154), the Jiangsu Natural Science Foundation (No. SBK201022682), the Research Fund for the Doctoral Program of Higher Education of China (No. 20090091120007), the Fundamental Research Funds for the Central University (No. 1112021101), the Jiangsu Cultivation of Innovative Engineering for Graduate Students (CXZZ12_0063), the Scientific Research Foundation of Graduate School of Nanjing University (No. 2012CL10), and the China Postdoctoral Science Foundation funded project (No. 2012M511254).

Supplementary material

10853_2013_7817_MOESM1_ESM.docx (1.9 mb)
Supplementary material 1 (DOCX 1919 kb)


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Bing Wang
    • 1
  • Chuang Li
    • 1
  • Hao Cui
    • 1
  • Jin Zhang
    • 2
  • Jianping Zhai
    • 1
  • Qin Li
    • 1
  1. 1.State Key Laboratory of Pollution Control and Resource Reuse, and School of the EnvironmentNanjing UniversityNanjingPeople’s Republic of China
  2. 2.School of Biochemical and Environmental EngineeringNanjing Xiaozhuang UniversityNanjingPeople’s Republic of China

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