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Miao Y, Wang Y, Ge B, He Z, Zhu X, Li J, Liu S, Yu L. Mixed Diethanolamine and Polyethyleneimine with Enhanced CO 2 Capture Capacity from Air. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207253. [PMID: 37017566 DOI: 10.1002/advs.202207253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/27/2023] [Indexed: 06/04/2023]
Abstract
Supported polyethyleneimine (PEI) adsorbent is one of the most promising commercial direct air capture (DAC) adsorbents with a long research history since 2002. Although great efforts have been input, there are still limited improvements for this material in its CO2 capacity and adsorption kinetics under ultradilute conditions. Supported PEI also suffers significantly reduced adsorption capacities when working at sub-ambient temperatures. This study reports that mixing diethanolamine (DEA) into supported PEI can increase 46% and 176% of pseudoequilibrium CO2 capacities at DAC conditions compared to the supported PEI and DEA, respectively. The mixed DEA/PEI functionalized adsorbents maintain the adsorption capacity at sub-ambient temperatures of -5 to 25 °C. In comparison, a 55% reduction of CO2 capacity is observed for supported PEI when the operating temperature decreases from 25 to -5 °C. In addition, the supported mixed DEA/PEI with a ratio of 1:1 also shows fast desorption kinetics at temperatures as low as 70 °C, resulting in maintaining high thermal and chemical stability over 50 DAC cycles with a high average CO2 working capacity of 1.29 mmol g-1 . These findings suggest that the concept of "mixed amine", widely studied in the solvent system, is also practical to supported amine for DAC applications.
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Affiliation(s)
- Yihe Miao
- College of Smart Energy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3 Yinlian Road, Shanghai, 201306, China
| | - Yaozu Wang
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3 Yinlian Road, Shanghai, 201306, China
| | - Bingyao Ge
- Research Center of Solar Power & Refrigeration, School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhijun He
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3 Yinlian Road, Shanghai, 201306, China
| | - Xuancan Zhu
- Research Center of Solar Power & Refrigeration, School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China
| | - Jia Li
- The Hong Kong University of Science and Technology (Guangzhou), No.2 Huan Shi Road South, Guangzhou, Nansha, 511458, China
- Jiangmen Laboratory for Carbon and Climate Science and Technology, No. 29 Jinzhou Road, Jiangmen, 529100, China
| | - Shanke Liu
- College of Smart Energy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China
| | - Lijun Yu
- College of Smart Energy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai, 200240, China
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Huang G, Liu K, Muhammad Y, Fu T, Wang L, Nong J, Xu S, Jiang L, Tong Z, Zhang H. Integrating magnetized bentonite and pinecone-like BiOBr/BiOI Step-scheme heterojunctions as novel recyclable photocatalyst for efficient antibiotic degradation. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Wei Q, Lu B, Yang Q, Shi C, Wei Y, Xu M, Zhang C, Yuan Y. MoS 2/Au Heterojunction Catalyst for SERS Monitoring of a Fenton-like Reaction. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1169. [PMID: 36770175 PMCID: PMC9920604 DOI: 10.3390/ma16031169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/18/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Fenton technology is one of advanced oxidation process (AOP) methods to treat wastewater through chemical oxidation. Due to the limitations of classical iron-based catalysts, it is still challenging to find suitable catalysts for Fenton-like reactions. Here, MoS2/Au heterojunctions were successfully synthesized by reduction of chloroauric acid in the solution of layered MoS2 prepared by hydrothermal method. As a model molecule, methylene blue (MB) was used as the species to be degraded to evaluate the performance of the catalyst. It was determined by UV-visible spectra that the optimal catalyst can be obtained when MoS2 (mg): HAuCl4 (wt. % mL) is 2:2. The Fenton-like reaction process was monitored by introducing highly sensitive surface enhanced Raman spectroscopy (SERS). The results show that MB can be degraded by 83% in the first 10 min of the reaction, indicating that MoS2/Au has good catalytic performance. In addition, as a fingerprint spectrum, SERS was used to preliminarily analyze the molecular structure changes during the degradation process. The result showed that C-N-C bond was easier to break than the C-S-C bond. NH2 group and the fused ring were destroyed at the comparable speed at the first 30 min. In terms of application applicability, it was showed that MB degradation had exceeded 95% at all the three pH values of 1.4, 5.0, and 11.1 after the reaction was carried out for 20 min. The test and analysis of the light environment showed that the catalytic efficiency was significantly improved in the natural light of the laboratory compared to dark conditions. The possible mechanism based on ·OH and ·O2- from ESR data was proposed. In addition, it was demonstrated to be a first-order reaction from the perspective of kinetics. This study made a positive contribution to broaden of the applicable conditions and scope of Fenton-like reaction catalysts. It is expected to be used as a non-iron catalyst in practical industrial applications. From the perspective of detection method, we expect to develop SERS as a powerful tool for the in situ monitoring of Fenton-like reactions, and to further deepen our understanding of the mechanism.
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Affiliation(s)
- Qian Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Beibei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qing Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Can Shi
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yulan Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Minmin Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, Soochow University, Suzhou 215123, China
| | - Chenjie Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yaxian Yuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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