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Alzarea LA, Alhumaimess MS, Alsohaimi IH, Hassan HMA, El-Aassar MR, Essawy AA, Kalil H. Efficient Dual-Function Catalyst: Palladium-Copper Nanoparticles Immobilized on Co-Cr LDH for Seamless Aerobic Oxidation of Benzyl Alcohol and Nitrobenzene Reduction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1956. [PMID: 37446472 PMCID: PMC10361210 DOI: 10.3390/nano13131956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/16/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023]
Abstract
Layered double hydroxides (LDHs) present exciting possibilities across various industries, ranging from catalytic applications to water remediation. By immobilizing nanoparticles, LDHs' characteristics and functionality can be enhanced, allowing for synergetic interactions that further expand their potential uses. A simple chemical method was developed to produce well-dispersed Pd-Cu NPs on a Co-Cr LDH support using a combination of in situ coprecipitation/hydrothermal and sol-immobilization techniques. The Pd-Cu@Co-Cr LDH catalysts was obtained, showing its catalytic activity in promoting the aerobic oxidation of alcohols and enabling the reduction of nitro-compounds through NaBH4 mediation. The physicochemical properties of the prepared catalyst were comprehensively investigated utilizing a range of analytical techniques, comprising FTIR, XRD, XPS, TGA, nitrogen adsorption isotherm, FESEM, and HRTEM-EDX. The findings showed the significance of immobilizing the bimetallic Pd-Cu nanoparticles on the Co-Cr LDH via an exceptional performance in the aerobic oxidation of benzyl alcohol (16% conversion, 99.9% selectivity to benzaldehyde) and the reduction of nitrobenzene (98.2% conversion, rate constant of 0.0921 min-1). The improved catalytic efficacy in benzyl alcohol oxidation and nitrobenzene reduction on the Pd-Cu@Co-Cr LDH catalyst is attributed to the uniform distribution and small size of the Pd-Cu NPs as active sites on the Co-Cr LDH surface. The prepared catalyst demonstrated exceptional stability during repeated runs. This study paves the way for multiple opportunities in tailoring, producing, and precisely controlling catalysts for various organic transformation reactions.
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Affiliation(s)
- Linah A Alzarea
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Mosaed S Alhumaimess
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | | | - Hassan M A Hassan
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - M R El-Aassar
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Amr A Essawy
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Haitham Kalil
- Chemistry Department, Cleveland State University, Cleveland, OH 44115, USA
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Alhumaimess MS, Aldosari OF, Alqhobisi AN, Alhaidari LM, Altwala A, Alzarea LA, Hassan HMA. A Facile Approach of Fabricating Bifunctional Catalysts for Redox Applications by Uniformly Immobilized Metallic Nanoparticles on NiCr LDH. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:987. [PMID: 36985881 PMCID: PMC10053817 DOI: 10.3390/nano13060987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
This study discloses the development of NiCr LDH, Ag@NiCr LDH, and Pd@NiCr LDH bifunction catalysts using a hydrothermal coprecipitation method followed by sol immobilization of metallic nanoparticles. The structures and morphologies of the synthesized nanocomposites were analyzed using FTIR, XRD, XPS, BET, FESEM-EDX, and HRTEM. The catalytic effectiveness of the samples was evaluated by tracking the progression of NaBH4-mediated nitrobenzene (NB) reduction to aniline and CO oxidation using UV-visible spectrophotometry and an infrared gas analyzer, respectively. Pd@NiCr LDH displayed much higher performance for both reactions than the bare NiCr LDH. The catalyst Pd@NiCr LDH showed robust catalytic activity in both the oxidation of carbon monoxide (T50% (136.1 °C) and T100% (200.2 °C)) and NaBH4-mediated nitrobenzene reduction (98.7% conversion and 0.365 min-1 rate constant). The results disclose that the Ni2+@ Cr3+/Cr6+ @Pd° ion pairs inside the LDH act as a charge transfer center and hence significantly enhance the catalytic performance. As a result, this research offers the novel NiCr LDH catalyst as a bifunctional catalyst for air depollution control and the organic transformation process.
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Affiliation(s)
- Mosaed S. Alhumaimess
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Obaid F. Aldosari
- Department of Chemistry, Faculty of Science, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Almaha N. Alqhobisi
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Laila M. Alhaidari
- Department of Chemistry, Faculty of Science, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Afnan Altwala
- Department of Chemistry, Faculty of Science, Majmaah University, Majmaah 11952, Saudi Arabia
| | - Linah A. Alzarea
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Hassan M. A. Hassan
- Department of Chemistry, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
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IL-Functionalized Mg 3Al-LDH as New Efficient Adsorbent for Pd Recovery from Aqueous Solutions. Int J Mol Sci 2022; 23:ijms23169107. [PMID: 36012371 PMCID: PMC9409223 DOI: 10.3390/ijms23169107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/10/2022] [Accepted: 08/11/2022] [Indexed: 11/16/2022] Open
Abstract
Palladium is a noble metal of the platinum group metals (PGMs) with a high value and major industrial applications. Due to the scarce palladium resources, researchers' attention is currently focused on Pd ions recovery from secondary sources. Regarding the recovery process from aqueous solutions, many methods were studied, amongst which adsorption process gained a special attention due to its clear advantages. Moreover, the efficiency and the selectivity of an adsorbent material can be further improved by functionalization of various solid supports. In this context, the present work aims at the synthesis and characterization of Mg3Al-LDH and its functionalization with ionic liquid (IL) (Methyltrialkylammonium chloride) to obtain adsorbent materials with high efficiency in Pd removal from aqueous solutions. The maximum adsorption capacity developed by Mg3Al-LDH is 142.9 mg Pd., and depending on the functionalization method used (sonication and co-synthesis, respectively) the maximum adsorption capacity increases considerably, qmax-Mg3Al IL-US = 227.3 mg/g and qmax-Mg3Al IL-COS = 277.8 mg/g.
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CaO nanoparticles incorporated metal organic framework (NH2-MIL-101) for Knoevenagel condensation reaction. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2021.103588] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Xu J, Li Y, Ding T, Guo H. Metal-Free Chemoselective Oxidation of 4-Methylquinolines into Quinoline-4-Carbaldehydes. Chem Asian J 2021; 16:3114-3117. [PMID: 34472705 DOI: 10.1002/asia.202100704] [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: 06/27/2021] [Revised: 08/17/2021] [Indexed: 11/09/2022]
Abstract
A convenient protocol for the synthesis of quinoline-4-carbaldehydes via chemoselective oxidation of 4-methylquinolines using hypervalent iodine(III) reagents as oxidant is described. This method highlights metal-free and mild reaction conditions, nice yield, good functional group tolerance, and high chemoselectivity.
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Affiliation(s)
- Jincheng Xu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R China
| | - Yang Li
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R China
| | - Tianling Ding
- Department of Hematology, Huashan Hospital, Fudan University, 12 Wulumuqi Middle Road, Shanghai, 200040, P. R China
| | - Hao Guo
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, P. R China
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Gong K, Zhang D, Wang Y, Li C, Zhang H, Li H, Feng H. Biguanide-functionalized hierarchical porous covalent organic frameworks for efficient catalysis of condensation reactions. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Novel and efficient multifunctional periodic mesoporous organosilica supported benzotriazolium ionic liquids for reusable synthesis of 2,4,5-trisubstituted imidazoles. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2020.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Characterization and Electrochemical Behaviour of Nanoscale Hydrotalcite-Like Compounds toward the Reduction of Nitrate. NANOMATERIALS 2020; 10:nano10101926. [PMID: 32992443 PMCID: PMC7599484 DOI: 10.3390/nano10101926] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/19/2020] [Accepted: 09/23/2020] [Indexed: 11/17/2022]
Abstract
In this research, nano Cu/Al–HTLCs, Co/Al–HTLCs and Cu/Co/Al–HTLCs were synthesized, characterized, and tested in electrolytic reduction nitrate. Experimental results showed that Cu/Al–HTLCs were less stable than Co/Al–HTLCs due to the Jahn–Teller effect. However, electrocatalytic activity of copper was superior to that of cobalt; thus, Cu/Co/Al–HTLCs were selected based on their stable crystalline structure and electrochemical activity. The optimized Cu2CoAl–HTLC was highly active in nitrate reduction, with two peaks for nitrate and nitrite reduction, respectively. Ammonia, nitrite and N-containing gases were found to be the final products of constant potential electrolysis at −0.54 and −0.74 V.
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