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2 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
1 Bulletin of the Polish Academy of Sciences. Technical Sciences

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Facile preparation of copper impregnated aluminum pillared montmorillonite: nanoclays for wastewater treatment

Tepmatee P., Siriphannon P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2016

Vol. 64, nr 3

553--560

Copper impregnated aluminum pillared montmorillonites (Cu-iAlpill-MMTs) were prepared by adding Cu2+ solution into dried aluminum polyohydroxy cation intercalated montmorillonite using various Cu2+ concentrations, i.e. 4, 7, 10 and 13 wt% and then calcining at 500°C. The Cu-iAlpill-MMTs possessed slit-liked mesopores with pore diameters of 3.3–3.8 nm and ~6–35 nm as observed from the nitrogen adsorption isotherms. The mesopore quantities of Cu-iAlpill-MMTs gradually decreased with the increase of impregnated Cu2+ concentrations. The impregnated CuO occupied not only the interior interlayers, but also the exterior surfaces of Cu-iAlpill-MMTs. The Cu-iAlpill-MMTs with 10 and 13 wt% of impregnated Cu2+ could inhibit the growth of Escherichia coli. The Cu-iAlpill-MMTs effectively acted as the heterogeneous catalyst for removal reactive orange 16 (RO16) in Fenton or photo-Fenton oxidation treatments. The higher impregnated Cu2+ and/or the longer treatment time brought about the higher percentage of RO16 removal.

Pillared montmorillonites modified with copper or cobalt as catalysts of DENOX with ammonia.

Chmielarz L., Zbroja M., Dudek B., Dziembaj R.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

451-456

Al2O3 or TiO2 pillared montmorillonites modified with Cu or Co have been studied as catalysts for NO reduction with ammonia. The type of a pillaring agent, introduced transition metal, and preparation conditions strongly influenced catalytic performance of obtained materials. Among the studied samples, the highest catalytic activity was measured for Ti-pillared montmorillonites modified with copper. All studied catalysts were characterized by high selectivity towards N2.

Application of pillared clays modified with transition metals in reduction of NO with C2H4.

Chmielarz L., Zbroja M., Kuśtrowski P., Rafalska-Łasocha A., Dziembaj R.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

463-468

Montmorillonites, pillared with Al2O3 or TiO2, were modified by introduction of transition metal (Cu or Co) by ion exchange method. Pillaring of clay with alumina caused significant increase of surface area and micropore volume due to increase of interlayer distance. Modification of montmorillonite with titania also resulted in increase of surface area and porosity, however pillared material was characterized by delaminated structure. Additionally, part of TiO2 was deposited on the sample surface in form of separate phase. Among the studied catalysts, titania pillared montmorillonites modified with copper have shown the highest activity in reduction of NO with ethylene in flue gas purifn.