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Mesoporous Waste Extracted SiO2-Al2O3 Supported Ni and Ni-H3PW12O40 nano-Catalysts for Photo-degradation of Methyl Orange Dye under UV irradiation

Abstract

Considering the positive potential value of wastes rather than of being unwanted materials, this research work is orientated alongside with this concept towards the production of waste based catalyst. Mesoporous SiO2-Al2O3 was prepared from both rice husk (source for silica) and waste aluminum foils using isophthalic acid as a textural modifier. X-ray diffraction and BET surface analyses of the as-prepared aluminosilicate have demonstrated an amorphous structure with an average pore radius of 5.4 nm. FT-IR spectrum reveals the existence of SiO2-Al2O3 interaction. In order to produce an efficient photocatalyst, Ni nanoparticles were subsequently loaded onto the aluminosilicate surface by reduction of NiCl2 using hydrazine. Another catalyst namely; Ni-H3PW12O40/ aluminosilicate, with strong Brønsted acid sites was also prepared by impregnating the support into an aqueous solution of H3PW12O40. The TEM images of the as-prepared materials show that the aluminosilicate particles are slab-like and the loading of Ni and H3O40PW12 has conserved the morphology of the mesoporous support due to the metal-metal interaction. The prepared catalysts were then employed in purification of water throughout photocatalytic degradation of methyl orange (MO) dye. The maximum MO adsorption over the surface of prepared materials was first determined in absence of UV radiation (dark). The photoactivity of the three materials under the effect of UV irradiation was then detected. The Ni/ aluminosilicate catalyst exhibits the highest rate of MO removal among the employed materials. A maximum removal % of 86 was obtained after irradiation time of 180 min using a dose of the catalyst equal to 3 g/L.

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Publication details

The article was received on 26 Mar 2018, accepted on 13 Apr 2018 and first published on 17 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ01479E
Citation: New J. Chem., 2018, Accepted Manuscript
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    Mesoporous Waste Extracted SiO2-Al2O3 Supported Ni and Ni-H3PW12O40 nano-Catalysts for Photo-degradation of Methyl Orange Dye under UV irradiation

    N. H. Shalaby, R. A. Elsalamony and A. M. A. El Naggar, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01479E

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