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A review on TiO2-based composites for superior photocatalytic activity

  • Wail Al Zoubi EMAIL logo , Abbas Ali Salih Al-Hamdani , Baek Sunghun and Young Gun Ko


Heterogeneous photocatalysts was a promising material for removing organic pollutants. Titanium dioxide (TiO2) was a suitable photocatalyst for its cost efficiency and high stability to reduce various pollutants. Enhancing TiO2 photocatalyst performance by doping with changed metals or non-metal ions and organic compounds have been reviewed. These methods could enhance photoelectrochemical activity via: (i) by a donor of electrons via electron-donor agents that would produce particular defects in TiO2 structure and capture transporters of charge; (ii) by reducing recombination rate of the charge transporters and increasing degradation of pollutants. This study investigates the modification approaches of TiO2 that comprise methods for overcoming the essential TiO2 restrictions and enhancing the photocatalytic degradation of organic pollutants. Consequently, it emphasized on the current progress of modified-TiO2 used for different pollutants in ambient conditions. Amendment techniques, such as inorganic and organic parts as doping, are studied. The reported experimental results obtained with the photocatalytic oxidation process for degrading organic pollutants were also collected and assessed.

Corresponding author: Wail Al Zoubi and Young Gun Ko, Materials Electrochemistry Laboratory, School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea, E-mail: (W. Al Zoubi) and (Y. G. Ko)

Funding source: National Research Foundation of Korea (NRF) 10.13039/501100003725

Funding source: Ministry of Science, ICT and Future Planning 10.13039/501100003621

Award Identifier / Grant number: 2009-0082580

Award Identifier / Grant number: NRF-2020R1A2C2004192

Funding source: Korea Institute for Advancement of Technology (KIAT) 10.13039/501100003661

Funding source: Ministry of Trade, Industry, and Energy, Republic of Korea 10.13039/501100003052

Award Identifier / Grant number: P0002019

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This research was supported by Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2009-0082580). This work was supported by the Mid-Level Researcher National Project of the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea (NRF-2020R1A2C2004192), and partly by the Competency Development Program for Industry Specialists of the Korea Institute for Advancement of Technology (KIAT) funded by the Ministry of Trade, Industry, and Energy, Republic of Korea (P0002019).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.


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Received: 2020-10-30
Accepted: 2021-01-04
Published Online: 2021-01-14
Published in Print: 2021-12-20

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