Aqueous hydrodechlorination of 4-chlorophenol over an Rh/reduced graphene oxide synthesized by a facile one-pot solvothermal process under mild conditions

Ren, Yanlin; Fan, Guangyin; Wang, Chenyu

doi:10.1016/j.jhazmat.2014.04.005

Cited by 36 publications

(14 citation statements)

References 41 publications

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“…HDC reactions have been studied over a number of metals, being those based on Pd [6,[12][13][14][15][16][17], Pt [14,17] and Rh [14,[17][18][19] with metal loadings ranging from 0.5 to 10% (w/w) the most active ones.…”

Section: Introductionmentioning

confidence: 99%

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Muñoz

Kaspereit

Etzold

2016

Chemical Engineering Journal

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Employing high surface area supports for catalytic hydrodechlorination can result in pronounced adsorption of reactants, intermediates and products. The influence of these sorption processes on the activity and selectivity upon 4-chlorophenol (4-CP) hydrodechlorination in aqueous solution has been studied using four commercial Pd/Al2O3 and Pd/AC catalysts at ambient pressure within the temperature range of 20-40°C ([4-CP]0=0.78-2.90mmolL-1, [catalyst]=1gL-1, 50NmLH2min-1). The adsorption capacity of the catalysts was independently evaluated. The Al2O3-based catalyst did not show any significant adsorption of those species whereas the activated carbon materials presented in all cases high uptakes (e.g. up to 2.4mmol4-CPgcat -1). In order to deduce true kinetic constants also for these catalysts, a kinetic model was developed, which accounts for the consecutive reaction and sorption processes in parallel. This expanded model resulted in a reasonable fit, can thus be used for comparison of different catalysts regardless their sorption capacity and allows predicting successfully the selectivity to the reaction productsThe authors gratefully acknowledge the funding of the German Research Council (DFG), which within the framework of its “Excellence Initiative” supports the Cluster of Excellence “Engineering of Advanced Materials” (www.eam.fau.de) at the University of Erlangen-Nurember

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Section: Introductionmentioning

confidence: 99%

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Muñoz

Kaspereit

Etzold

2016

Chemical Engineering Journal

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“…60 No. 12 activation of a C-H bond in methane during the conversion of natural gas into liquid fuels [181][182][183][184][185][186], the direct synthesis of dimethylcarbonate from methanol [187][188][189][190], and the hydrochlorination of acetylene [191][192][193].…”

Section: Science China Materialsmentioning

confidence: 99%

Graphitized nanocarbon-supported metal catalysts: synthesis, properties, and applications in heterogeneous catalysis

Huang

2017

Sci. China Mater.

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Graphitized nanocarbon materials can be an ideal catalyst support for heterogeneous catalytic systems. Their unique physical and chemical properties, such as large surface area, high adsorption capacity, excellent thermal and mechanical stability, outstanding electronic properties, and tunable porosity, allow the anchoring and dispersion of the active metals. Therefore, currently they are used as the key support material in many catalytic processes. This review summarizes recent relevant applications in supported catalysts that use graphitized nanocarbon as supports for catalytic oxidation, hydrogenation, dehydrogenation, and C-C coupling reactions in liquid-phase and gas-solid phase-reaction systems. The latest developments in specific features derived from the morphology and characteristics of graphitized nanocarbon-supported metal catalysts are highlighted, as well as the differences in the catalytic behavior of graphitized nanocarbon-supported metal catalysts versus other related catalysts. The scientific challenges and opportunities in this field are also discussed. Keywords: nanocarbon materials; graphitized carbon supports; metal catalysts; hetergeneous catalysis INTRODUCTIONCarbon combines its atoms in diverse hybridization states (sp, sp 2 , sp 3 ) to form a variety of polymorphs. These are composed entirely of carbon but have different physical structures and different names, including diamond, graphite, fullerenes, and carbines, among others [1][2][3][4][5]. Because these various and versatile allotropes produce materials with a large range of properties, carbon materials can be used in a number of technological processes, including high-tech catalytic ones [6][7][8][9][10].In heterogeneous catalysis, carbon material plays wellestablished and important roles in a wide range of applications, both as catalyst in its own right and as a unique support material [11][12][13][14][15]. The chemical stability of carbon supports in some specifically aqueous phase biomass conversion surpasses that of metal oxide materials; in addition, carbon materials present other common and key advantages as support materials for catalysis [1,5]. From the point of physical structure, porous carbon can be prepared in different forms (granules, cloth, fibers, pallets, etc.). Due to its chemical properties, carbon structure is resistant to both acidic and basic media. The structure of carbon is stable at high temperature (even above 1023 K under inert atmosphere). The hydrophilic/ hydrophobic nature of carbon can be easily modified. Active metals on the support can be easily reduced. For the purposes of industrial economy and environment, the active phase can be easily recovered. Conventional carbon supports are lower-cost and more easily available than other conventional supports. Although several kinds of carbon materials have been studied, active carbon (AC) [12,[16][17][18][19] and, to a lesser extend, carbon black [20][21][22][23] have long been the most commonly used carbon supports. AC is an amorphous solid prepa...

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“…The presence of implant materials inside the human body can interfere with the host immune response, and microorganisms have opportunity to adhere to the implant surface, forming socalled biofilms [22]. The antimicrobial properties of graphenebased materials have been thoroughly evaluated by many researchers [22][23][24][25].…”

Section: Antibacterial Activitymentioning

confidence: 99%

“…The antimicrobial properties of graphenebased materials have been thoroughly evaluated by many researchers [22][23][24][25]. The antibacterial activity of graphene oxide and graphene is attributed to the significant membrane stress induced by the sharp edges of their nanosheets, which may result in physical damage to cell membranes, leading to the loss of bacterial membrane integrity and the leakage of RNA [25,26].…”

Section: Antibacterial Activitymentioning

confidence: 99%

Electrochemical synthesis of nanosized hydroxyapatite/graphene composite powder

Mišković‐Stanković¹,

Eraković²,

Jankovic³

et al. 2015

Carbon letters

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Electrochemical synthesis was employed to prepare a novel hydroxyapatite/graphene (HAP/ Gr) composite powder suitable for medical applications as a hard tissue implant (scaffold). The synthesis was performed in a homogeneous dispersion containing Na 2 H 2 EDTA·2H 2 O, NaH 2 PO 4 and CaCl 2 with a Ca/EDTA/PO 4 3− concentration ratio of 0.25/0.25/0.15M, along with 0.01 wt% added graphene nanosheets, at a current density of 137 mA cm −2 and pH value of 9.0. The field emission scanning electron microscopy and transmission electron microscopy observations of the composite HAP/Gr powder indicated that nanosized hydroxyapatite particles were uniformly placed in the graphene overlay. Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction confirmed graphene incorporation in the HAP/Gr powder. The electrochemically prepared HAP/Gr composite powder exhibited slight antibacterial effect against the growth of the bacterial strain Staphylococcus aureus.

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Aqueous hydrodechlorination of 4-chlorophenol over an Rh/reduced graphene oxide synthesized by a facile one-pot solvothermal process under mild conditions

Cited by 36 publications

References 41 publications

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Graphitized nanocarbon-supported metal catalysts: synthesis, properties, and applications in heterogeneous catalysis

Electrochemical synthesis of nanosized hydroxyapatite/graphene composite powder

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