Yoel Sasson

Yoel Sasson
Hebrew University of Jerusalem | HUJI · Institute of Chemistry

About

325
Publications
24,544
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7,569
Citations
Citations since 2016
34 Research Items
2265 Citations
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300

Publications

Publications (325)
Article
Full-text available
Photocatalysis has an exceptional capacity to eliminate a wide range of harmful microorganisms and is proven to be superior over commonly used disinfection methods. A visible light-induced photocatalyst, the BiOCl0.2Br0.8@gypsum hybrid composite, composed of microspheres (∼3 μm) molded with a gypsum composite as a honeycomb-shaped filter was proven...
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A non-hazardous and relatively mild protocol was formulated for an effectual hydrogen generation process via “Magnesium-activated water” system with Pd-g-C3N4 photocatalyst under visible light at room temperature. Water functions photochemically as hydrogen donor without any external source with Pd-g-C3N4 photocatalyst. The synthesized Pd-g-C3N4 ph...
Article
Full-text available
A non-hazardous and relatively mild protocol was formulated for an effectual hydrogen generation process via “Magnesium-activated water” system with Pd-g-C3N4 photocatalyst under visible light at room temperature. Water functions photochemically as hydrogen donor without any external source with Pd-g-C3N4 photocatalyst. The synthesized Pd-g-C3N4 ph...
Article
Full-text available
In the present in vitro study, we tested the chemical composition, cytotoxicity and antidiabetic activity of two distinct extracts of wild Artichoke-like vegetable, Gundelia tournefortii : methanol and hexane. GC/MS phytochemical analysis of G. tournefortii methanol and hexane extracts revealed 39 compounds reported here for the first time in G. to...
Cover Page
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Showcasing collaborative research from Prof. Yoel Sasson group at the Hebrew University, Jerusalem, Israel and Dr. A. P. Singh & Dr. Pradeep Kumar group from CSIR-NCL, Pune, India. Synthesis of heterogeneous Ru(II)-1,2,3-triazole catalyst supported over SBA-15: application to the hydrogen transfer reaction and unusual highly selective 1,4-disubstit...
Article
In the present study we demonstrate a simple and efficient method for ligand formation and covalent anchoring to heterogeneous support via click reaction. The complex tris(triphenylphosphine)ruthenium(II) dichloride [RuCl2(PPh3)3] anchored over the click modified ligand of SBA-15, forms a new highly efficient heterogeneous SBA-15-Tz-Ru(II)TPP catal...
Article
Hydrogen is recognized as an ultimate fuel due to its clean burning and its capacity to convert chemical energy to electricity and vice versa. Nonetheless, hydrogen is also known as a hazardous material which entails strict compliance with safety regulations. Consequently, numerous research laboratories are seeking for safe chemical and physical me...
Article
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Chloride–bromide halogen exchange was realized when a mixture of an alkyl chloride and an alkyl bromide were reacted over a supported molten alkyl phosphonium catalyst.
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The exploration of catalytic isomerization reactions of an allylic alcohol to ketone, in the presence of μ-oxo-triruthenium acetate as a precatalyst in alcohol solvents, has established that the catalyst is heterogeneous in nature and proceeds by means of the in situ formed Ru⁰ nanoparticles (Ru⁰NPs). This reaction is used as an indicator for evalu...
Article
The present study describes the highly efficient heterogeneous photoactive catalyst Ru-g-C3N4 screened for selective transfer hydrogenation of nitroarenes and olefins. Photoactive catalyst Ru-g-C3N4 exhibits excellent reactivity in visible light under very mild reaction conditions via using hydrazine hydrate as a source of hydrogen with high turnov...
Article
Formic acid is well known as a hydrogen source and a hydrogen donor under thermal, catalytic and photocatalytic conditions. In this study, we generate hydrogen and carbon dioxide in a ratio of 1:1 by decomposing formic acid in presence of a homogeneous ruthenium catalysis under mild conditions. At 40oC TOF>600 h−1 was realized. The catalyst is stab...
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Full-text available
In a promising approach, heterogeneous g-C3N4 as a solid base catalyst exhibits appreciable activity in Knoevenagel condensations at room temperature for the synthesis of substituted stilbene in presence of a crown-ether phase transfer catalyst. High yield of the product substituted stilbene were isolated in a very short reaction time period (∼30 m...
Article
Green and efficient immobilization of catalytically active metal nanoparticles into porous supporting materials and their successful application in environmental remediation is of important scientific interest in practice. Herein, we established a new role of bismuth oxyhalides (BiOX) to produce Pt NPs inside mesoporous alumina to develop the nanoc...
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Diverse methods for converting biomass into fuels are necessary for the functioning of a flexible and profitable biorefinery. Catalytic hydrocracking of fatty acids and their derivatives, which can be used as biofuels precursors, is rather scarce. In this work we introduce a highly selective hydrocracking process for castor oil fatty acid methyl es...
Article
The formation of valuable products and especially fuel candidates from lignocellulosic biomass is highly desirable. Lignocellulose derived halogenated furfurals formation was reported as highly efficient in comparison to the current existing methods of lignocellulose transformation. However, halogenated furfurals are platform chemicals and not end...
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The behavior of the particle size distribution (PSD) during the preparation of sol–gel silica-based antireflective coatings (ARCs) by dip coating was examined. It was found that the PSD after deposition differs dramatically from the PSD in the sol–gel suspensions, with the PSD after deposition being much narrower. A correlation between a decrease i...
Article
This study demonstrates the potential of a new BiOCl0.875 Br0.125 photocatalyst to disinfect Escherichia coli in water under simulated solar irradiation. Photocatalytic efficiency was examined for different photocatalyst loadings, solar wavelengths, exposure times, photocatalyst concentration × contact time (Ct) concept, and with the use of scaveng...
Article
Solvent-free, selective and sustainable reaction protocol for an autoxidation of alkylbenzenes catalyzed by Co-NHPI (Cobalt-N-hydroxyphthalimide) under PTC (Phase Transfer Conditions) is described. A multigram scale preparation of acetophenone from ethylbenzene oxidation is demonstrated. The effect of catalyst [Cobalt, DDAB (Di-n-decyl-di-methyl am...
Article
We report a very easy and effective approach for synthesizing unique palladium-on-gold supra-nanostructures (Au@Pd-SprNSs) decorated graphene oxide (GO) nanosheets. The SprNSs comprising Au nanorods as core and a unique close-packed assembly of tiny anisotropic Pd NPs as shell, were homogeneously distributed on the GO surface via electrostatic self...
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The primary objective of this study is to determine the 'true catalyst' in an allylic alcohol isomerization reaction involving μ3-oxo-triruthenium(iii) acetate [Ru3O(OCOCH3)6(H2O)3][OCOCH3] as catalyst. This ruthenium-complex was previously presumed to act as a homogeneous catalyst. However, we have confirmed the heterogeneous nature of this cataly...
Article
Full-text available
Highly effective and fast oxidation of naphthalene(s) to phthalic acid(s) under biphasic conditions using nominal catalyst loading (0.5 mol%) of ruthenium chloride, 2.5 mol% tetrabutyl ammonium bromide as phase transfer catalyst and inexpensive aqueous sodium hypochlorite (NaOCl) as reagent has developed. Recovery, regeneration and reuse of the cat...
Article
Lignocellulose derived halogenated furfurals are important chemicals that can serve as starting materials for diverse products such as drugs, polymers and fuels, including fuel additives. In this paper a protocol for the synthesis of 5-chloromethyl furfural (CMF) and 5-bromomethyl furfural (BMF) is put forward. The proposed process is based on a tw...
Article
The critical assay of carbon black concentration suffers from the lack of available methods, especially in-situ methods suitable for nanoparticles. We propose a useful tool for monitoring carbon nanoparticles concentration in liquids by means of RGB imaging, fluorescence and conductivity measurements. In this study carbon black particles of 25–75 n...
Article
Icosahedral nanocatalysts (NCs) have shown very interesting physical and chemical properties owing to their multiply twinned nanostructures. Herein, we introduce a novel heterogemini surfactant (C10OhpNC8) assisted seed mediated growth approach for the synthesis of monodisperse icosahedral gold (Au) NCs in aqueous solution at room temperature. Very...
Article
We have described the synthesis of bimetallic dendritic platinum decorated gold nanorods (AuNR@dendritic-Pt) by spatial control of Pt growth over gold nanorods (AuNRs) via a heterogeneous seed-mediated growth method at room temperature. Amounts of the Au seed and Pt-precursor were accustomed to achieve a tunable volume fraction of Pt coverage on th...
Article
We demonstrate a simple and effective method to obtain highly pure and monodispersed spherical gold nanoparticles (AuNPs) with a narrow size distribution (RSD ∼ 4-7%) in aqueous medium. The synthetic strategy involves the addition of HAuCl4 in preheated sodium citrate (SC) solution followed by addition of tris base (TB) which simultaneously acts as...
Article
A novel heterogeneous photoactive catalyst is developed by incorporating ruthenium over a new photoactive graphite carbon nitride (g-C3N4) support for efficient photocatalytic transfer hydrogenation of various carbonyl functional group compounds with different alcohols. A synthesized photoactive catalyst Ru–g-C3N4 exhibits good to excellent reactiv...
Article
We report the fabrication of thin films of bismuth oxyhalide solid solution with highly exposed {001} facets with the help of cetyltrimethylammonium bromide and aluminium oxyhydroxide. These {001} facet exposed films showed enhanced photocatalytic activities compared to those of randomly oriented facets.
Article
A highly stable 75 wt % BiOClx Br1-x -loaded alumina composite film has been developed for the fabrication of glass-based photoreactors. A very simple approach has been adopted that does not involve the use of a special instrument and can be applied to all types of substrates irrespective to their size and shape. The structure and morphology of the...
Article
The aim of this study was to evaluate the role of glucose transporter-4 (GLUT4) in the antidiabetic effects of methanol, hexane and dichloromethane extracts of the aerial parts of Ocimum basilicum (OB) and to analyze their phytochemical composition. Phytochemical analysis of the three extracts by GC/MS using the silylation derivatization technique...
Article
Novel, green and mild protocol was developed for an efficient reduction of alkenes to alkanes using "iron activated water" and catalytic Pd/C (2.5 mol%). Water function as a terminal hydrogen source without any external acid or base and in the absence of a solvent.The Pd/C catalyst could be recovered and recycled. In the course of the reaction zero...
Article
Following our report on the fabrication of BiOClxBr1-x (0 ≥ x ≥ 1) alloys, and via careful rational optimization and substantial tuning, we upgraded the previous photocatalytic system by means of a controlled doping with elemental bismuth particles. The latter leads to the formation of well-defined structures characterized by effective separation o...
Article
Herein we report the fabrication of a novel heterojunctioned BiOCl x Br 1Àx @gypsum composite and its application as a self-cleaning surface for the straightforward use in construction and building materials. The morphology, chemical composition and crystal structure of the hybrid material were characterized using X-ray diffraction and scanning ele...
Article
A selective, effective and sustainable catalytic transfer hydrogenation of phenol to cyclohexanone on supported palladium using potassium formate as benign hydrogen source at atmospheric pressure and mild reaction conditions has demonstrated. A reaction temperature, catalyst (Pd/C), solvent (water) quantity and type of hydrogen source are found to...
Article
In situ chemical oxidation (ISCO) is a technique used to remediate contaminated soil and groundwater systems. In this study superoxide oxidations of chlorinated solvents, PAHs, PCHs, PCBs, diesel and petroleum products were investigated in soil slurry systems under a variety of experimental conditions. Superoxide, generated from hydrogen peroxide a...
Article
The relationship between the refractive index and the porosity of silica based anti-reflective coatings (ARCs) has been studied. The coatings were prepared with the traditional Stöber method. The refractive index was evaluated by fitting vis–NIR transmittance spectra to Fresnel׳s coefficient of reflection using the transfer matrix method. The poros...
Article
Pd/C catalyzed deoxygenation of castor oil fatty acid methyl esters (FAME), composed primarily from methyl ricinoleate, has been explored and optimized. Castor oil is a promising low cost feed stock for production of fuels. Under mild hydrogen pressure in the presence of hexane at supercritical conditions the main product was identified as heptadec...
Article
This study demonstrates the potential of a new BiOCl0.875Br0.125 photocatalyst to degrade pharmaceuticals in water (i.e., carbamazepine (CBZ), ibuprofen (IBF), bezafibrate (BZF), and propranolol (PPL)), under simulated solar irradiation. Different parameters were examined through their influence on CBZ degradation. Increasing the catalyst concentra...
Article
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A novel chemistry for the efficient sequestration of carbon dioxide via swift nucleophilic attack by superoxide anions is disclosed. A relatively stable aqueous solution of the latter is generated in situ by contacting alkali hydroxide solution with hydrogen peroxide at pH 11. Using a simple gas liquid scrubber containing the above blend, carbon di...
Article
In the recent decades superoxide [O(2-.) ] has become the subject of considerable interest. Nonetheless, generation of superoxide compounds is still a substantial challenge. The standard methods for synthesis of superoxide derivatives are either through the oxidation of molten alkali metals with hot air or by using electrolytic reduction of oxygen...
Article
Polyhaloalkanes such as carbon tetrachloride (CTC) are classified as biorefractory, highly toxic and ozone depleting materials. Those materials are suspected as being carcinogenic and are widespread contaminants in soil and ground water. Accordingly, schemes to effectively destruct and mineralize polyhalomethanes are in great need. We herewith repo...
Article
Full-text available
The behavior of the size distribution of colloidal silica during aggregation was studied. The effecting parameters including: pH, temperature, colloidal concentration, and electrolyte concentration were altered to elucidate the nature of the aggregation kinetic regime. Size distribution was measured by Dynamic Light Scattering monitoring the progre...
Article
With careful rational optimization and substantial simplification of the syntheses of the recently reported alloys BiO(ClxBr1–x), we fabricated, via a very simple procedure and at room temperature, a unique visible-light-driven photocatalyst with excellent activity. The alloy BiOCl0.875Br0.125 totally decomposed 15 mg/L aqueous Rhodamine B solution...
Article
Full-text available
Despite the enormous achievements in conventional medicine, herbal-based medicines are still a common practice for the treatment of diabetes. Trigonella foenum-graecum, Atriplex halimus, Olea europaea, Urtica dioica, Allium sativum, Allium cepa, Nigella sativa, and Cinnamomum cassia are strongly recommended in the Greco-Arab and Islamic medicine fo...
Article
Full-text available
Despite the enormous achievements in conventional medicine, herbal-based medicines are still a common practice for the treatment of diabetes. Trigonella foenum-graecum, Atriplex halimus, Olea europaea, Urtica dioica, Allium sativum, Allium cepa, Nigella sativa, and Cinnamomum cassia are strongly recommended in the Greco-Arab and Islamic medicine fo...
Article
A simple continuous process is described for the removal of mercury from gas streams (such as flue gas of a coal fired power stations) using imidazolium based Task Specific Ionic Liquids [TSILs] with the general structure ([RMIM][XI(2)(-)]) where X=Cl, Br or I. The latter are formed by blending dialkylimidazolium halide salts with iodine. When appl...
Article
The widespread soluble complex RuCl2(PPh3)3 is evidently not the true catalyst in numerous hydrogen transfer reactions where it has been utilized. In the presence of alcohol donors, particularly under boiling conditions, the complex is swiftly reduced to Ru(0) and forms nanosized clusters which are the genuine catalysts. The so formed nanoparticles...
Article
Phase-transfer catalyzed preparation of acetylenes from the corresponding vicinal dibromo compounds via double dehydrobromination using the mild solid base, anhydrous potassium phosphate, under very mild conditions is reported.
Article
A novel class of heterojunctioned bismuth oxyhalide photocatalysts yBiO(ClxBr1-x)-(1 - y)BHO (bismuth oxide hydrate) has been prepared by a simple hydrothermal method. The new materials are highly efficient under visible light irradiation (lambda >= 420 nm) for the degradation of Rhodamine B (RhB), Acetophenone (AP) and photooxidation of iodide. Ev...
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In this study, a facile and effective method to modify the photocatalytic performance of a bismuth oxy-bromide (BiOBr) semiconductor through the fabrication of a heterojunction with a hydrated bismuth oxide (BHO) is reported. The new yBiOBr-(1 − y)BHO heterojunction, synthesized by a simple hydrothermal method, exhibits a high photocatalytic activi...
Article
In this study, a facile and effective method to modify the photocatalytic performance of a bismuth oxy-bromide (BiOBr) semiconductor through the fabrication of a heterojunction with a hydrated bismuth oxide (BHO) is reported. The new yBiOBr-(1 − y)BHO heterojunction, synthesized by a simple hydrothermal method, exhibits a high photocatalytic activi...
Article
A new K3Bi2(NO3)(9) phase was discovered at a synthesis of Bi-containing photocatalysts. K3Bi2(NO3)(9) has cubic structure with unit cell parameter a = 13.5354(20) angstrom, and belongs to P4(3) 32 (No. 212) space group. New phase is isostructural with the K(3)Ln(2)(NO3)(9) (Ln = La, Ce, Pr, Nd, and Sm) phases. The crystal structure was refined fro...
Article
We report here the first observation of a bismuth potassium nitrate Bi1.7K0.9O2(NO3)(2), obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) angstrom. b = 3.8703(7) angstrom. and c = 24.1271(4) angstrom. Its crystal structure was refined fro...
Article
A novel active photocatalyst, which is a heteroconjuction of a bismuth oxyhydrate and BiOCl, has been synthesized by a simple hydrothermal method. The photocatalytic activity of the new material was measured in the degradation of Rhodamine B ( RhB) and Acetophenone (AP) and in the photocatalytic oxidation of iodide in water under UV-vis and visible...
Article
A new K3Bi2(NO3)9 phase was discovered at a synthesis of Bi-containing photocatalysts. K3Bi2(NO3)9 has cubic structure with unit cell parameter a = 13.5354(20)A˚ , and belongs to P4332 (No. 212) space group. New phase is isostructural with the K3Ln2(NO3)9 (Ln = La, Ce, Pr, Nd, and Sm) phases. The crystal structure was refined from powder X-ray diff...
Article
We report here the first observation of a bismuth potassium nitrate Bi1.7K0.9O2(NO3)2, obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a= 3.8698(7) Å, b= 3.8703(7) Å, and c = 24.1271(4) Å. Its crystal structure was refined from powder X-ray diffractio...
Article
Potassium triphosphate is a surprisingly active catalyst for the catalytic transfer hydrogenation of carbonyl compounds. A pretreatment at 600 °C is critical to obtain the active material. Temperature programmed desorption of CO2 indicates that sites of lower basicity were created after heat treatment for 5 h as compared to 1 h. With 2-propanol as...
Article
A new family of BiO(ClxBr1−x) photocatalysts have been synthesized by a hydrothermal method. The photocatalytic activity of the new material was measured on the degradation of Rhodamine B (RhB) and Acetophenone (AP) and photooxidation of potassium iodide in water under UV–vis and visible light (λ≥420nm) irradiations. In comparison to Degussa P25, t...
Article
Kinetic data are reported regarding the esterification of 1,4-dichlorobutane with sodium formate catalyzed by quaternary ammonium salts as a model for reactions in series, under solid–liquid phase transfer conditions. The process was found to follow a consecutive first-order mechanism of the general type A → R → S. The reactivity of the quaternary...