Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation
Novel bamboo activated carbon (BAC) catalysts decorated with manganese oxides (MnO<sub>x</sub>) were prepared with varying MnO<sub>x</sub> contents through a facile one-step redox reaction. Due to the physical anchoring effect of the natural macropore structure for catalyst a...
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MDPI AG
2024-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/3/663 |
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| author | Zhenrui Li Yujun Li Shijie Li Jianfeng Ma Qianli Ma Zhihui Wang Jiajun Wang Keying Long Xing’e Liu |
| author_facet | Zhenrui Li Yujun Li Shijie Li Jianfeng Ma Qianli Ma Zhihui Wang Jiajun Wang Keying Long Xing’e Liu |
| author_sort | Zhenrui Li |
| collection | DOAJ |
| description | Novel bamboo activated carbon (BAC) catalysts decorated with manganese oxides (MnO<sub>x</sub>) were prepared with varying MnO<sub>x</sub> contents through a facile one-step redox reaction. Due to the physical anchoring effect of the natural macropore structure for catalyst active components, homogeneous MnO<sub>x</sub> nanoparticles (NPs), and high specific surface area over catalyst surface, the BAC@MnO<sub>x</sub>-N (N = 1, 2, 3, 4, 5) catalyst shows encouraging adsorption and catalytic oxidation for indoor formaldehyde (HCHO) removal at room temperature. Dynamic adsorption and catalytic activity experiments were conducted. The higher S<sub>micro</sub> (733 m<sup>2</sup>/g) and V<sub>micro</sub>/V<sub>t</sub> (82.6%) of the BAC@MnO<sub>x</sub>-4 catalyst could facilitate its excellent saturated and breakthrough adsorption capacity (5.24 ± 0.42 mg/g, 2.43 ± 0.22 mg/g). The best performer against 2 ppm HCHO is BAC@MnO<sub>x</sub>-4 catalyst, exhibiting a maximum HCHO removal efficiency of 97% for 17 h without any deactivation as RH = 0, which is higher than those of other MnO<sub>x</sub>-based catalysts. The average oxidation state and in situ DRIFTS analysis reveal that abundant oxygen vacancies on the BAC@MnO<sub>x</sub>-4 catalyst could be identified as surface-active sites of decomposing HCHO into the intermediate species (dioxymethylene and formate). This study provides a potential approach to deposit MnO<sub>x</sub> nanoparticles onto the BAC surface, and this hybrid BAC@MnO<sub>x</sub> material is promising for indoor HCHO removal at room temperature. |
| first_indexed | 2024-03-08T03:51:44Z |
| format | Article |
| id | doaj.art-69615eb6cec148708ce7b4034afeb730 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-08T03:51:44Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-69615eb6cec148708ce7b4034afeb7302024-02-09T15:19:00ZengMDPI AGMolecules1420-30492024-01-0129366310.3390/molecules29030663Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and OxidationZhenrui Li0Yujun Li1Shijie Li2Jianfeng Ma3Qianli Ma4Zhihui Wang5Jiajun Wang6Keying Long7Xing’e Liu8International Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaGuangxi Zhuang Autonomous Region Forestry Research Institute, Nanning 530002, ChinaInternational Centre for Bamboo and Rattan, Beijing 100102, ChinaNovel bamboo activated carbon (BAC) catalysts decorated with manganese oxides (MnO<sub>x</sub>) were prepared with varying MnO<sub>x</sub> contents through a facile one-step redox reaction. Due to the physical anchoring effect of the natural macropore structure for catalyst active components, homogeneous MnO<sub>x</sub> nanoparticles (NPs), and high specific surface area over catalyst surface, the BAC@MnO<sub>x</sub>-N (N = 1, 2, 3, 4, 5) catalyst shows encouraging adsorption and catalytic oxidation for indoor formaldehyde (HCHO) removal at room temperature. Dynamic adsorption and catalytic activity experiments were conducted. The higher S<sub>micro</sub> (733 m<sup>2</sup>/g) and V<sub>micro</sub>/V<sub>t</sub> (82.6%) of the BAC@MnO<sub>x</sub>-4 catalyst could facilitate its excellent saturated and breakthrough adsorption capacity (5.24 ± 0.42 mg/g, 2.43 ± 0.22 mg/g). The best performer against 2 ppm HCHO is BAC@MnO<sub>x</sub>-4 catalyst, exhibiting a maximum HCHO removal efficiency of 97% for 17 h without any deactivation as RH = 0, which is higher than those of other MnO<sub>x</sub>-based catalysts. The average oxidation state and in situ DRIFTS analysis reveal that abundant oxygen vacancies on the BAC@MnO<sub>x</sub>-4 catalyst could be identified as surface-active sites of decomposing HCHO into the intermediate species (dioxymethylene and formate). This study provides a potential approach to deposit MnO<sub>x</sub> nanoparticles onto the BAC surface, and this hybrid BAC@MnO<sub>x</sub> material is promising for indoor HCHO removal at room temperature.https://www.mdpi.com/1420-3049/29/3/663formaldehydebamboo activated carbonmanganese oxideadsorptioncatalytic oxidation |
| spellingShingle | Zhenrui Li Yujun Li Shijie Li Jianfeng Ma Qianli Ma Zhihui Wang Jiajun Wang Keying Long Xing’e Liu Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation Molecules formaldehyde bamboo activated carbon manganese oxide adsorption catalytic oxidation |
| title | Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation |
| title_full | Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation |
| title_fullStr | Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation |
| title_full_unstemmed | Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation |
| title_short | Enhanced and Sustainable Removal of Indoor Formaldehyde by Naturally Porous Bamboo Activated Carbon Supported with MnO<sub>x</sub>: Synergistic Effect of Adsorption and Oxidation |
| title_sort | enhanced and sustainable removal of indoor formaldehyde by naturally porous bamboo activated carbon supported with mno sub x sub synergistic effect of adsorption and oxidation |
| topic | formaldehyde bamboo activated carbon manganese oxide adsorption catalytic oxidation |
| url | https://www.mdpi.com/1420-3049/29/3/663 |
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