Investigation of MOF-derived humidity-proof hierarchical porous carbon frameworks as highly-selective toluene absorbents and sensing materials
| Autor: | Shuai Liu, Huaizhang Wang, Haoyun Zheng, Menglei Yuan, Zehui Li, Xinghui Li, Jingkun Jiang, Mingjun Kim, Wangyang Fu, Xiaoxue Wu, Xianming Zheng, Guangya Jiang, Hao Wu, Sadia Rehman, Yi Yuan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Materials science Carbonization Health Toxicology and Mutagenesis 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Pollution Toluene chemistry.chemical_compound Adsorption chemistry Chemical engineering Desorption Specific surface area Environmental Chemistry Metal-organic framework Mesoporous material Waste Management and Disposal Carbon 0105 earth and related environmental sciences |
| Zdroj: | Journal of hazardous materials. 411 |
| ISSN: | 1873-3336 |
| Popis: | Carbon frameworks (CFs) derived from metal-organic frameworks (MOFs) have been produced as adsorbents of toluene. To further obtain optimum hierarchical porous carbon structure of CFs, different treatment temperatures were applied to a typical kind of MOFs (ZIF-8). The adsorption capacity of the toluene of hierarchical porous CFs obtained from ZIF-8 under 1100 °C (CF-1100, adsorption capacity of 208.5 mg/g) was higher than that of other carbonization temperature and MOFs. Impressively, the adsorbent CF-1100 also exhibited strong hydrophobicity, low desorption temperature, and good selectivity to toluene. The adsorption capacity decreased by only 10.4% under wet condition compared with the dry condition, standing on the top of the recently reported adsorbents. The impressive adsorption performance of CF-1100 is attributed to the larger specific surface area (1024 m2/g) and pore volume (0.497 cm3/g), newly generated micropores (pore width is 0.6–0.8 nm) and mesopores (pore width above 10 nm), and carbonaceous structure with higher degree of graphitization. Based on the adequate adsorption performance, CF-1100 coated quartz crystal microbalances as sensor also showed a high sensitivity of 0.4004 Hz/ppm and small relative standard deviations of 1.0745% for toluene sensing. This contribution provides a foundation for optimizing potential adsorbents and sensing materials for air pollution abatement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect