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Qin H, Sun J, Yang X, Li H, Li X, Wang R, He S, Zhou C. Defective UiO-66 metal-organic gels for optimizing gaseous toluene capture. J Colloid Interface Sci 2024; 655:23-31. [PMID: 37924588 DOI: 10.1016/j.jcis.2023.10.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/06/2023]
Abstract
Developing high-performance sorbents for volatile organic compounds (VOCs) is urgently required for environmental cleaning and personnel protection. Zirconium-based metal-organic frameworks (Zr-MOFs) have been deemed attractive candidates for gaseous toluene capture due to their superior stability and high adsorption capacity. However, the practical application of powdered Zr-MOFs is hindered by inherent limitations. Here, we report a series of defective UiO-66 metal-organic gels (G66-X) with variable missing linker deficiency by altering the modulator concentration. The defect concentration of the adsorbents has a significant impact on the porosity and gaseous toluene adsorption capacity. Dynamic breakthrough results reveal that G66-9 demonstrates optimal breakthrough time of 336 min/g and uptake amount of 334 mg/g, outperforming those of many other typical toluene adsorbents. The breakthrough times and the uptake capacities dramatically decrease with the increase of adsorption temperature. An outstanding regeneration performance of adsorbents can almost maintain even after five adsorption-desorption cycles.
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Affiliation(s)
- Haojie Qin
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China
| | - Junwei Sun
- School of Safety Science and Emergency Management, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China; State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China
| | - Xiaobin Yang
- State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China
| | - Heguo Li
- State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China
| | - Xiaopeng Li
- State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China
| | - Ruixue Wang
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Song He
- School of Safety Science and Emergency Management, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Chuan Zhou
- State Key Laboratory of NBC Protection for Civilian, Beijing 100191, China.
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Zhang J, Zou J, Xu X, Li Z, Zeng Z, Li L. Nitrogen-Doped Porous Carbon from Biomass with Efficient Toluene Adsorption and Superior Catalytic Performance. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8115. [PMID: 36431602 PMCID: PMC9698617 DOI: 10.3390/ma15228115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/04/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The chemical composition and surface groups of the carbon support affect the adsorption capacity of toluene. To investigate the effect of catalyst substrate on the catalytic performance, two different plant biomasses, banana peel and sugarcane peel, were used as carbon precursors to prepare porous carbon catalyst supports (Cba, Csu, respectively) by a chemical activation method. After decorating PtCo3 nanoparticles onto both carbon supports (Cba, Csu), the PtCo3-su catalyst demonstrated better catalytic performance for toluene oxidation (T100 = 237 °C) at a high space velocity of 12,000 h-1. The Csu support possessed a stronger adsorption capacity of toluene (542 mg g-1), resulting from the synergistic effect of micropore volume and nitrogen-containing functional groups, which led to the PtCo3-su catalyst exhibiting a better catalytic performance. Moreover, the PtCo3-su catalyst also showed excellent stability, good water resistance properties, and high recyclability, which can be used as a promising candidate for practical toluene catalytic combustion.
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Affiliation(s)
- Jing Zhang
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Jianwu Zou
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Xiang Xu
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Zhuang Li
- Hunan Ecological and Environmental Affairs Center, Changsha 410014, China
| | - Zheng Zeng
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
| | - Liqing Li
- School of Energy Science and Engineering, Central South University, Changsha 410083, China
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Li H, Cheng Y, Li J, Li T, Zhu J, Deng W, Zhu J, He D. Preparation and Adsorption Performance Study of Graphene Quantum Dots@ZIF-8 Composites for Highly Efficient Removal of Volatile Organic Compounds. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4008. [PMID: 36432294 PMCID: PMC9695402 DOI: 10.3390/nano12224008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/06/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Based on the large specific surface area and excellent adsorption potential of graphene quantum dots (GQDs) and zeolitic imidazolate framework-8 (ZIF-8) materials, a GQDs@ZIF-8 composite was constructed to achieve optimal matching of the microstructure and to acquire efficient adsorption of volatile organic compounds (VOCs). GQDs and ZIF-8 were synthesized and then compounded by the solution co-deposition method to obtain GQDs@ZIF-8 composites. GQDs were uniformly decorated on the surface of the ZIF-8 metal-organic framework (MOF), effectively restraining the agglomeration, improving the thermal stability of ZIF-8 and forming abundant active sites. Thus, the VOC removal percentage and adsorption capacity of the GQDs@ZIF-8 composites were significantly improved. Toluene and ethyl acetate were chosen as simulated VOC pollutants to test the adsorption performance of the composites. The results showed that, after the addition of GQDs, the adsorption property of GQDs@ZIF-8 composites for toluene and ethyl acetate was obviously improved, with maximum adsorption capacities of 552.31 mg/g and 1408.59 mg/g, respectively, and maximum removal percentages of 80.25% and 93.78%, respectively, revealing extremely high adsorption performance. Compared with raw ZIF-8, the maximum adsorption capacities of the composites for toluene and ethyl acetate were increased by 53.82 mg/g and 104.56 mg/g, respectively. The kinetics and isotherm study revealed that the adsorption processes were in accordance with the pseudo-first-order kinetic model and the Freundlich isotherm model. The thermodynamic results indicated that the adsorption process of the GQDs@ZIF-8 composites was a spontaneous, endothermic and entropy increase process. This study provides a new way to explore MOF-based adsorption materials with high adsorption capacity which have broad application prospects in VOC removal fields.
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Affiliation(s)
- Hao Li
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Youliang Cheng
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, China
| | - Jiaxian Li
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, China
| | - Tiehu Li
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Jia Zhu
- Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, China
| | - Weibin Deng
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Jiajia Zhu
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
| | - Delong He
- Laboratoire de Mécanique Paris-Saclay, Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS, 91190 Gif-sur-Yvette, France
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