Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application
TiO<sub>2</sub> has been generally studied for photocatalytic sterilization, but its antibacterial activities are limited. Herein, TiO<sub>2</sub> nanospheres with rutile/anatase heterophase junctions are prepared by a wet chemical/annealing method. The large BET surface area...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/10/2585 |
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| author | Yingying Qin Xinyu Wang Pengyuan Qiu Jian Tian |
| author_facet | Yingying Qin Xinyu Wang Pengyuan Qiu Jian Tian |
| author_sort | Yingying Qin |
| collection | DOAJ |
| description | TiO<sub>2</sub> has been generally studied for photocatalytic sterilization, but its antibacterial activities are limited. Herein, TiO<sub>2</sub> nanospheres with rutile/anatase heterophase junctions are prepared by a wet chemical/annealing method. The large BET surface area and pore size are beneficial for the absorption of bacteria. The rutile/anatase heterojunctions narrow the bandgap, which enhances light absorption. The rutile/anatase heterojunctions also efficiently promote the photogenerated carriers’ separation, finally producing a high yield of radical oxygen species, such as •O<sub>2</sub><sup>−</sup> and •OH, to sterilize bacteria. As a consequence, the obtained TiO<sub>2</sub> nanospheres with rutile/anatase heterojunctions present an improved antibacterial performance against <i>E. coli</i> (98%) within 3 h of simulated solar light irradiation, exceeding that of TiO<sub>2</sub> nanospheres without annealing (amorphous) and TiO<sub>2</sub> nanospheres annealing at 350 and 550 °C (pure anatase). Furthermore, we design a photocatalytic antibacterial spray to protect the file paper. Our study reveals that the TiO<sub>2</sub> nanospheres with rutile/anatase heterojunctions are a potential candidate for maintaining the durability of paper in the process of archival protection. |
| first_indexed | 2024-03-10T06:19:41Z |
| format | Article |
| id | doaj.art-f372888efeee41b3ae9259206da82c98 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:19:41Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f372888efeee41b3ae9259206da82c982023-11-22T19:23:35ZengMDPI AGNanomaterials2079-49912021-09-011110258510.3390/nano11102585Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection ApplicationYingying Qin0Xinyu Wang1Pengyuan Qiu2Jian Tian3Archives Department, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaTiO<sub>2</sub> has been generally studied for photocatalytic sterilization, but its antibacterial activities are limited. Herein, TiO<sub>2</sub> nanospheres with rutile/anatase heterophase junctions are prepared by a wet chemical/annealing method. The large BET surface area and pore size are beneficial for the absorption of bacteria. The rutile/anatase heterojunctions narrow the bandgap, which enhances light absorption. The rutile/anatase heterojunctions also efficiently promote the photogenerated carriers’ separation, finally producing a high yield of radical oxygen species, such as •O<sub>2</sub><sup>−</sup> and •OH, to sterilize bacteria. As a consequence, the obtained TiO<sub>2</sub> nanospheres with rutile/anatase heterojunctions present an improved antibacterial performance against <i>E. coli</i> (98%) within 3 h of simulated solar light irradiation, exceeding that of TiO<sub>2</sub> nanospheres without annealing (amorphous) and TiO<sub>2</sub> nanospheres annealing at 350 and 550 °C (pure anatase). Furthermore, we design a photocatalytic antibacterial spray to protect the file paper. Our study reveals that the TiO<sub>2</sub> nanospheres with rutile/anatase heterojunctions are a potential candidate for maintaining the durability of paper in the process of archival protection.https://www.mdpi.com/2079-4991/11/10/2585TiO<sub>2</sub> nanospheresrutileanatasephotocatalytic antibacterial activityarchival paper protection |
| spellingShingle | Yingying Qin Xinyu Wang Pengyuan Qiu Jian Tian Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application Nanomaterials TiO<sub>2</sub> nanospheres rutile anatase photocatalytic antibacterial activity archival paper protection |
| title | Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application |
| title_full | Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application |
| title_fullStr | Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application |
| title_full_unstemmed | Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application |
| title_short | Enhanced Photocatalytic Antibacterial Properties of TiO<sub>2</sub> Nanospheres with Rutile/Anatase Heterophase Junctions and the Archival Paper Protection Application |
| title_sort | enhanced photocatalytic antibacterial properties of tio sub 2 sub nanospheres with rutile anatase heterophase junctions and the archival paper protection application |
| topic | TiO<sub>2</sub> nanospheres rutile anatase photocatalytic antibacterial activity archival paper protection |
| url | https://www.mdpi.com/2079-4991/11/10/2585 |
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