Principles and mechanisms of photocatalytic dye degradation on TiO 2 based photocatalysts: a comparative overview
Open accessAbstract
Pictorial representation of all possible dye degradation reaction in UV light initiated indirect dye degradation mechanism. This mechanism is practically more important over visible light initiated direct mechanism.
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The mechanism of photocatalysis in a semiconductor involves absorption of photon energy equal to or greater than the bandgap, resulting in formation of electron and hole pairs as charge carriers.
“The mechanism of photocatalysis in a semiconductor material involves the absorption of photon energy (visible-light-active semiconductor can absorb solar energy), which is equal to or greater than the bandgap energy of the photocatalyst, resulting in the formation of electron and hole pairs as charge carriers.”
From Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications (2022) · cites this paper as [176]
The electron reacts with dissolved oxygen leading to formation of superoxide radical anions, which result in hydroxyl radical production; these OH radicals are responsible for degradation of organic compounds.
“The electron reacts with dissolved oxygen leading to the formation of superoxide radical anions (O2−•), which result in hydroxyl (OH•) radical production. These OH• radicals are responsible for the degradation of organic compounds176,177.”
From Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications (2022) · cites this paper as [176]
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Recent advances in floating TiO2-based photocatalysts for environmental application
Xing, Z., Zhang, J., Cui, J., Yin, J., Zhao, T., Kuang, J., Xiu, Z., Wan, N., & Zhou, W. (2018) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2017.12.005 · Cited by 550 · see citing works
Theerthagiri, J., Karuppasamy, K., Lee, S. J., Shwetharani, R., Kim, H.-S., Pasha, S. K. K., Ashokkumar, M., & Choi, M. Y. (2022) · Light: Science & Applications · doi:10.1038/s41377-022-00904-7 · Cited by 461 · see citing works
Gopinath, K. P., Madhav, N. V., Krishnan, A., Malolan, R., & Rangarajan, G. (2020) · Journal of Environmental Management · doi:10.1016/j.jenvman.2020.110906 · Cited by 449 · see citing works
- Authors
- Ajmal, A., Majeed, I., Malik, R. N., Idriss, H., & Nadeem, M. A.
- Affiliations
- Quaid-i-Azam University (PK)
- Saudi Arabia Basic Industries (Saudi Arabia) (SA)
- Corresponding author
- Nadeem, Muhammad Amtiaz
- Venue
- RSC Adv.
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 4
- Issue
- 70
- Pages
- 37003-37026
- ISSN
- 2046-2069 (ISSN-L)
- OpenAlex
- W2040697085
- Cited by
- 1,485
- References
- 0
- Citations by year
- 2026: 113 · 2025: 147 · 2024: 201 · 2023: 190 · 2022: 186 · 2021: 182 · 2020: 141 · 2019: 97 · 2018: 83 · 2017: 60 · 2016: 46 · 2015: 37 · 2014: 2
- FWCI
- 15.95
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- RSC Advances (publishedVersion)
- Funders
- University of Engineering and Technology, Lahore
- Quaid-i-Azam University
- Higher Education Commision, Pakistan
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Keywords
- photocatalytic dye degradation, TiO2 photocatalyst, ultraviolet radiation, visible light photocatalysis
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