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Sakr AAE, Abd El-Hafiz DR, Elgabry O, Abdullah ES, Ebiad MA, Zaki T. Visible light photoreforming of greenhouse gases by nano Cu-Al LDH intercalated with urea-derived anions. RSC Adv 2023; 13:33541-33558. [PMID: 38020006 PMCID: PMC10652186 DOI: 10.1039/d3ra06190f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023] Open
Abstract
The accumulation of anthropogenic greenhouse gases (GHGs) in the atmosphere causes global warming. Global efforts are carried out to prevent temperature overshooting and limit the increase in the Earth's surface temperature to 1.5 °C. Carbon dioxide and methane are the largest contributors to global warming. We have synthesized copper-aluminium layered double hydroxide (Cu-Al LDH) catalysts by urea hydrolysis under microwave (MW) irradiation. The effect of MW power, urea concentration, and MII/MIII ratios was studied. The physicochemical properties of the prepared LDH catalysts were characterized by several analysis techniques. The results confirmed the formation of the layered structure with the intercalation of urea-derived anions. The urea-derived anions enhanced the optical and photocatalytic properties of the nano Cu-Al LDH in the visible-light region. The photocatalytic activity of the prepared Cu-Al LDH catalysts was tested for greenhouse gas conversion (CH4, CO2, and H2O) under visible light. The dynamic gas mixture flow can pass through the reactor at room temperature under atmospheric pressure. The results show a high conversion percentage for both CO2 and CH4. The highest converted amounts were 7.48 and 1.02 mmol mL-1 g-1 for CH4 and CO2, respectively, under the reaction conditions. The main product was formaldehyde with high selectivity (>99%). The results also show the stability of the catalysts over several cycles. The current work represents a green chemistry approach for efficient photocatalyst synthesis, visible light utilization, and GHGs' conversion into a valuable product.
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Affiliation(s)
- Ayat A-E Sakr
- Gas Chromatogarphy Lab, Analysis & Evaluation Division, Egyptian Petroleum Research Institute Nasr City Cairo 11727 Egypt
| | - Dalia R Abd El-Hafiz
- Catalysis Lab, Petroleum Refining Division, Egyptian Petroleum Research Institute Nasr City P.B. 11727 Cairo Egypt
| | - Osama Elgabry
- Gas Chromatogarphy Lab, Analysis & Evaluation Division, Egyptian Petroleum Research Institute Nasr City Cairo 11727 Egypt
| | - Eman S Abdullah
- Gas Chromatogarphy Lab, Analysis & Evaluation Division, Egyptian Petroleum Research Institute Nasr City Cairo 11727 Egypt
| | - Mohamed A Ebiad
- Gas Chromatogarphy Lab, Analysis & Evaluation Division, Egyptian Petroleum Research Institute Nasr City Cairo 11727 Egypt
| | - Tamer Zaki
- Catalysis Lab, Petroleum Refining Division, Egyptian Petroleum Research Institute Nasr City P.B. 11727 Cairo Egypt
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Regeneration mechanism, modification strategy, and environment application of layered double hydroxides: Insights based on memory effect. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214253] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Zhang K, Li Y, Wang H, Zhang Z, Liu G, Zhang Y. MgCo layered double hydroxide-based yolk shell polyhedrons as multifunctional sulfur mediator for lithium-sulfur batteries. NANOTECHNOLOGY 2021; 33:115405. [PMID: 34740208 DOI: 10.1088/1361-6528/ac3703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
The development of efficient sulfur host materials to address the shuttle effect issues of lithium polysulfides (LiPSs) is crucial in the lithium-sulfur (Li-S) batteries but still challenging. In the present study, a novel yolk shell structured MgCo-LDH/ZIF-67 composite is designed as Li-S battery cathode. In this composite, the shell layer is MgCo layered double hydroxide constructed by partially etching ZIF-67 nanoparticle by Mg2+, and the core is the unreacted ZIF-67 particle. The unique yolk shell structure not only provides abundant pores for sulfur accommodation, but also facilitates the electrolyte penetration and ion transport. The ZIF-67 core exhibits strong polar adsorption to LiPSs through the Lewis acid-base interactions, and the micropores/mesoporous can further trap LiPSs. Meanwhile, the MgCo-LDH shell exposes enough sulfur-philic sites for enhancing chemisorption and catalyzes LiPSs conversion. As a result, when MgCo-LDH/ZIF-67 is used as sulfur host in the cathode, the cell achieves a high discharge capacity of 1121 mAh g-1at 0.2 C, and an areal capacity of 5.0 mAh cm-2under high sulfur loading of 5.8 mg cm-2. The S/MgCo-LDH/ZIF-67 electrode holds a promising potential for the development of Li-S batteries.
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Affiliation(s)
- Kai Zhang
- Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - You Li
- Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Hongyu Wang
- Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Zisheng Zhang
- Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Guihua Liu
- Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Yongguang Zhang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China
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