The role of method of preparation of CuO–NiO system on its physicochemical surface and catalytic properties

El-Shobaky, G.A.; Radwan, Nagi R.E.; El‐Shall, M. Samy; Turky, A.M.; Hassan, Hassan M.A.

doi:10.1016/j.colsurfa.2007.06.014

Cited by 29 publications

(23 citation statements)

References 20 publications

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“…For the synthesis of mixed metal oxide nanoparticles, different methods such as homogenous precipitation [15][16][17], coprecipitation [18,19], impregnation [20], sol-gel [21,22], sonochemical [23], micro-emulsion [24], hydrothermal [25], thermal decomposition [26] and chemical vapor deposition [27] have been employed. Among the reported preparation methods, solution based ones possess some advantages; they lead to materials with fine particle size, high purity and good homogeneity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Bayal

Jeevanandam

2012

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Bayal

Jeevanandam

2012

Journal of Alloys and Compounds

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“…CuO/NiO catalysts are known to be active in CO oxidation by molecular oxygen 24. Figure 8 shows the results of temperature‐programmed CO oxidation performed from room temperature to 220 °C over the four catalysts 100Cu_Cal, 96Cu_Cal, 92Cu_Cal, and 85Cu_Cal.…”

Section: Resultsmentioning

confidence: 99%

Effect of Ni Incorporation into Malachite Precursors on the Catalytic Properties of the Resulting Nanostructured CuO/NiO Catalysts

et al. 2016

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Synthetic nickelian malachite nanopowders (Cu 1-x Ni x ) 2 (OH) 2 CO 3 with x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1 were prepared by constant-pH coprecipitation. N 2 sorption isotherms confirmed a steady increase of the BET surface area with increasing Ni content for the as-synthesized and calcined mesoporous materials. Powder XRD patterns for x ≤ 0.1 indicate the formation of single-phase materials with an anisotropic contraction of the unit cell. This is related to the gradual decrease of the Jahn-Teller distortion in the malachite structure. An XRDamorphous hydroxide-rich phase is formed for x > 0.1, which appears as spongelike regions in SEM images. Thermogravimetric analysis showed that nickel lowers the onset of thermal de- [a]

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“…Based on the literature, the combination of metals or metal oxides in a common matrix can result in materials with new structures and superior properties . To obtain these nanosized materials different procedures such as impregnation, sol–gel, sonochemical, hydrothermal, thermal decomposition and chemical vapor deposition have been utilized …”

Section: Introductionmentioning

confidence: 99%

Nano NiO/AlMCM‐41, a green synergistic, highly efficient and recyclable catalyst for the reduction of nitrophenols

Derikvand

Rahmati

Azadbakht

2019

Applied Organom Chemis

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Highly ordered mesoporous molecular sieves AlMCM‐41 and a new NiO/AlMCM‐41 nanocomposite were synthesized using a sol–gel method. Fourier transform infrared (FT‐IR) spectroscopy, X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X‐ray spectroscopy (EDX), and N2 adsorption desorption analyses were used to examine the structure, morphology, size and phase composition of the synthesized NiO/AlMCM‐41 nanocomposites. AlMCM‐41 embedded with NiO nanoparticles was subsequently prepared using different nickel loadings in a direct synthetic route. The results show the successful deposition of NiO nanoparticles onto the framework of AlMCM‐41. AlMCM‐41 provides enormous benefits such as environmentally safe, economic viability and porosity when used as support for NiO nanoparticles. The excellent catalytic activities of AlMCM‐41 and NiO/AlMCM‐41 were investigated for the reduction of nitrophenols (4‐NP, 2‐NP) to aminophenols (4‐AP, 2‐AP) in water at ambient temperature. The best observed performance of reduction of NP with 100% conversion into analogous amino derivatives occurred within 6 min with an estimated rate constant of 0.46 min−1. The efficiency of reduction was observed to increase as a function of NiO enrichment. The NiO/AlMCM‐41 nanocomposite could be recycled and reused up to five times without noticeable change in its structure and activity. These properties make NiO/AlMCM‐41 nanocomposite an ideal platform to study various heterogeneous catalytic processes which can have application in purification, catalysis, sensing devices, and green chemistry.

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The role of method of preparation of CuO–NiO system on its physicochemical surface and catalytic properties

Cited by 29 publications

References 20 publications

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Effect of Ni Incorporation into Malachite Precursors on the Catalytic Properties of the Resulting Nanostructured CuO/NiO Catalysts

Nano NiO/AlMCM‐41, a green synergistic, highly efficient and recyclable catalyst for the reduction of nitrophenols

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