Selective dehydrogenation of isopropanol on carbonized metal–organic frameworks

Abdelhamid, Hani Nasser; Goda, Mohamed N.; Said, Abd El‐Aziz A.

doi:10.1016/j.nanoso.2020.100605

Cited by 49 publications

(22 citation statements)

References 68 publications

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“…The acid‐base properties of the bentonite sample calcined at 200 o C,were measured adopting isopropyl alcohol (IPA) dehydration/dehydrogenation method [58–60] and the obtained results are presented in Figure 2(b). Inspection of these results revealed that, at all reaction temperatures, propene was the only product with a selectivity of 100 % reflecting the acidic nature of bentonite sample [59,61,62] .…”

Section: Resultsmentioning

confidence: 99%

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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In this study, natural bentonite has been used as a highly efficient, and low‐cost sorbent for the adsorptive removal of methylene blue (MB), crystal violet (CV), and fuchsine basic (FB) dyes from aqueous solutions. X‐ray fluorescence (XRF), Thermogravimetry and differential thermal analyses (TG‐DTA), X‐ray diffraction (XRD), Scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analyses for bentonite clay were performed. Results revealed that bentonite is an excellent sorbent for the elimination of these dyes with maximum adsorption capacities of 598.8, 929.7 and 875.2 mg g−1 for MB, CV, and FB, respectively. In addition, thermodynamic results reflected that the adsorption process is a spontaneous, endothermic, and of chemisorption nature. While kinetic studies specified that the adsorption of these dyes is ruled by the film diffusion and pore diffusion mechanism. Moreover, simultaneous removal of these dyes from their binary and ternary mixtures was also examined. A Regeneration study demonstrated that, bentonite can be recycled several times with almost the same efficiency.

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Section: Resultsmentioning

confidence: 99%

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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“…To date, thanks to the development of innovative technologies, molecular hydrogen can be obtained from a widely diversified range of renewable energy sources, thus being able to support the development of resilient energy systems [1,2]. Some recent advances in molecular hydrogen production indicate that a possible route is to perform cycloalkanes [3] and alcohol dehydrogenation [4] as green and sustainable method, but also to realize hydrolytic dehydrogenation of ammonia borane on reduced CoFe 2 O 4 for the H 2 evolution [5] or the hydrolysis of NaBH 4 on ZIF-8 materials [6].…”

Section: Introductionmentioning

confidence: 99%

LaFeO3 Modified with Ni for Hydrogen Evolution via Photocatalytic Glucose Reforming in Liquid Phase

et al. 2021

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In this work, the optimization of Ni amount on LaFeO3 photocatalyst was studied in the photocatalytic molecular hydrogen production from glucose aqueous solution under UV light irradiation. LaFeO3 was synthesized via solution combustion synthesis and different amount of Ni were dispersed on LaFeO3 surface through deposition method in aqueous solution and using NaBH4 as reducing agent. The prepared samples were characterized with different techniques: Raman spectroscopy, UltraViolet-Visible Diffuse Reflectance Spettroscopy (UV–Vis-DRS), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), X-ray Fluorescence (XRF), Transmission Electron microscopy (TEM), and Scanning Electron microscopy (SEM) analyses. For all the investigated photocatalysts, the presence of Ni on perovskite surface resulted in a better activity compared to pure LaFeO3. In particular, it is possible to identify an optimal amount of Ni for which it is possible to obtain the best hydrogen production. Specifically, the results showed that the optimal Ni amount was equal to nominal 0.12 wt% (0.12Ni/LaFeO3), for which the photocatalytic H2 production was equal to 2574 μmol/L after 4 h of UV irradiation. The influence of different of photocatalyst dosage and initial glucose concentration was also evaluated. The results of the optimization of operating parameters indicated that the highest molecular hydrogen production was achieved on 0.12Ni/LaFeO3 sample with 1.5 g/L of catalyst dosage and 1000 ppm initial glucose concentration. To determine the reactive species that play the most significant role in the photocatalytic hydrogen production, photocatalytic tests in the presence of different radical scavengers were performed. The results showed that •OH radical plays a significant role in the photocatalytic conversion of glucose in H2. Moreover, photocatalytic tests carried out with D2O instead of H2O evidenced the role of water molecules in the photocatalytic production of molecular hydrogen in glucose aqueous solution.

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“…The high chemical stability of MOFs, especially against water molecules, is usually required for applications such as gas adsorption of CO2 from the atmosphere or hot-flue gases [29] . MOFs were applied for several applications, including CO2 adsorption [30] , chemical conversion/fixation of CO2 [31][32][33][34][35][36][37][38][39][40] , catalysis [41][42][43] , photovoltaic devices [44] , sensors [45][46][47][48] , hydrogen production [18,[49][50][51][52][53] , dye sensistizing solar cells (DSSCs) [54] , water treatment [55][56][57] , energy [58,59] , and osmotic power generators [60] .…”

Section: Introductionmentioning

confidence: 99%

A Review on Removal of Carbon Dioxide (CO2) using Zeolitic Imidazolate Frameworks: Adsorption and Conversion via Catalysis

Abdelhamid

2022

Preprint

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Carbon dioxide (CO2) is one of the culprit causes of global climatic changes. Furthermore, the efficient separation of CO2 from other gaseous mixtures using ZIFs-based materials is vital for several processes such as flue gas separation, gas sweetening, and natural gas processing. Zeolitic imidazolate frameworks (ZIFs)-based materials are emerging adsorbents and catalysts for CO2 gas removal via adsorption and conversion into valuable chemicals. ZIFs-based adsorbents with high adsorption/conversion efficiencies and tunable properties can be achieved by judicious synthesis and fabrication methods. We reviewed ZIF-based materials for CO2 removal via adsorption and catalysis (e.g., cycloaddition, carboxylation, hydrogenation, N-formylation, electrocatalysis, and photocatalysis). In addition, recent development methods such as membrane synthesis and ways to improve the gas separation performance of ZIF membranes were highlighted. The prospective point of view to promote industrial applications and commercialization of ZIF-based materials was briefly discussed. Once challenges such as low performance and reproducibility for ZIFs-based materials are solved, scalability and cost-effectiveness should not become issues.

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Selective dehydrogenation of isopropanol on carbonized metal–organic frameworks

Cited by 49 publications

References 68 publications

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

LaFeO3 Modified with Ni for Hydrogen Evolution via Photocatalytic Glucose Reforming in Liquid Phase

A Review on Removal of Carbon Dioxide (CO2) using Zeolitic Imidazolate Frameworks: Adsorption and Conversion via Catalysis

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