A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst
A composite of TiO2 quantum dots (TiO2QDs) and TiO2 nanoparticles (TiO2NPs) was successfully deposited on glass beads (GBs), with a very low content of TiO2 (<0.3 wt%), by a rapid, simple, inexpensive, and scalable synthesis method. The TiO2QDs-TiO2NPs/GBs catalyst possesses an extremely high pho...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2023-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2023/3400175 |
| _version_ | 1797826535315472384 |
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| author | Thu Ha Thi Vu Thi Tho Lam Duy Nam Dao Dieu Anh Van Trung Hai Huynh |
| author_facet | Thu Ha Thi Vu Thi Tho Lam Duy Nam Dao Dieu Anh Van Trung Hai Huynh |
| author_sort | Thu Ha Thi Vu |
| collection | DOAJ |
| description | A composite of TiO2 quantum dots (TiO2QDs) and TiO2 nanoparticles (TiO2NPs) was successfully deposited on glass beads (GBs), with a very low content of TiO2 (<0.3 wt%), by a rapid, simple, inexpensive, and scalable synthesis method. The TiO2QDs-TiO2NPs/GBs catalyst possesses an extremely high photocatalytic performance under simulated solar irradiation, with the complete degradation of the aqueous solutions of methylene blue in 60 minutes of photodegradation. There were no changes in the catalytic activity after six times of recycling. The superior performance of the catalyst should be attributed to the role of the synergistic effect between TiO2NPs and TiO2QDs to prevent the accumulation of TiO2 nanoparticles during the oxidation reaction, to improve the absorption in the visible region, to enhance the immigration of photogenerated electrons and holes in interfaces of two materials in the TiO2QDs-TiO2NPs composite, which leads to a reduced charge recombination rate, and to generate midgap states and suppress the recombination of electron-hole pairs. |
| first_indexed | 2024-04-09T12:33:56Z |
| format | Article |
| id | doaj.art-1078bf0b855849f59fad8b6f1e9dc145 |
| institution | Directory Open Access Journal |
| issn | 2090-9071 |
| language | English |
| last_indexed | 2024-04-09T12:33:56Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj.art-1078bf0b855849f59fad8b6f1e9dc1452023-05-16T00:00:01ZengHindawi LimitedJournal of Chemistry2090-90712023-01-01202310.1155/2023/3400175A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance PhotocatalystThu Ha Thi Vu0Thi Tho Lam1Duy Nam Dao2Dieu Anh Van3Trung Hai Huynh4National Key Laboratory for Petrochemical and Refinery TechnologiesNational Key Laboratory for Petrochemical and Refinery TechnologiesNational Key Laboratory for Petrochemical and Refinery TechnologiesHanoi University of Science and TechnologyHanoi University of Science and TechnologyA composite of TiO2 quantum dots (TiO2QDs) and TiO2 nanoparticles (TiO2NPs) was successfully deposited on glass beads (GBs), with a very low content of TiO2 (<0.3 wt%), by a rapid, simple, inexpensive, and scalable synthesis method. The TiO2QDs-TiO2NPs/GBs catalyst possesses an extremely high photocatalytic performance under simulated solar irradiation, with the complete degradation of the aqueous solutions of methylene blue in 60 minutes of photodegradation. There were no changes in the catalytic activity after six times of recycling. The superior performance of the catalyst should be attributed to the role of the synergistic effect between TiO2NPs and TiO2QDs to prevent the accumulation of TiO2 nanoparticles during the oxidation reaction, to improve the absorption in the visible region, to enhance the immigration of photogenerated electrons and holes in interfaces of two materials in the TiO2QDs-TiO2NPs composite, which leads to a reduced charge recombination rate, and to generate midgap states and suppress the recombination of electron-hole pairs.http://dx.doi.org/10.1155/2023/3400175 |
| spellingShingle | Thu Ha Thi Vu Thi Tho Lam Duy Nam Dao Dieu Anh Van Trung Hai Huynh A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst Journal of Chemistry |
| title | A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst |
| title_full | A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst |
| title_fullStr | A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst |
| title_full_unstemmed | A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst |
| title_short | A Composite of TiO2 Quantum Dots and TiO2 Nanoparticles Coated on Anti-Bumping Glass Beads (TiO2QDs-TiO2NPs/GBs), with a Very Low Content of TiO2 as a High Performance Photocatalyst |
| title_sort | composite of tio2 quantum dots and tio2 nanoparticles coated on anti bumping glass beads tio2qds tio2nps gbs with a very low content of tio2 as a high performance photocatalyst |
| url | http://dx.doi.org/10.1155/2023/3400175 |
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