The Bulgarian natural expanded mineral obtained from Bentonite AD perlite (A deposit of "The Broken Mountain" for perlite mining, near by the village of Vodenicharsko, in the municipality of Djebel), was loaded with silver (as ion form - Ag+ 2 and 5 wt% by the incipient wetness impregnation method), and as atomic silver - Ag0 using Tollen-s reagent (silver mirror reaction). Some physicochemical characterization of the samples are provided via: DC arc-AES, XRD, DR-IR and UV-VIS. The aim of this work was to obtain and test the silver-loaded catalyst for ozone decomposition. So the samples loaded with atomic silver show ca. 80% conversion of ozone 20 minutes after the reaction start. Then conversion decreases to ca. 20 % but stay stable during the prolongation of time.
[1] P. Nikolov, K. Genov, B. Ivanov, K Milenova. and I. Avramova, "Ozone
Decomposition on PdO-CeO2/ZSM-5 Catalyst."Compt. Rend. Acad.
Bulg. Sci., Vol. 62 No. 12, pp. 1515-1520, 2009.
[2] N. Kumar, P. Konova, A. Naydenov, T. Heikillä, T Salmi. and D. Yu.
Murzin, "Synthesis of Novel Ag Modified MCM-41 Mesoporous
Molecular Sieve and Beta Zeolite Catalysts for Ozone Decomposition at
Ambient Temperature" Catal. Lett. Vol. 98 No.1, pp. 57-60, 2004.
[3] N. Kumar, P. Konova, A. Naydenov, T. Salmi, D.Yu. Murzin, T
Heikillä. and V.-P. Lehto, "Ag-modified H-Beta, H-MCM-41 and SiO2:
Influence of support, acidity and Ag content in ozone decomposition at
ambient temperature" Cat. Today, Vol. 119 No. 1-4, pp. 342-346, 2007.
[4] A. Naydenov, P. Konova, Pen. Nikolov, F. Klingstedt, N. Kumar, D.
Kovacheva, P. Stefanov, R Stoyanova. and D. Mehandjiev,
"Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste
gases emissions". Cat. Today, Vol. 137 No. 2-4, pp. 471-474, 2008.
[5] P. Nikolov, K Milenova. and D. Mehandjiev, "Decomposition of Ozone
over Pure and Doped with Cu and Mn Zinc Oxide", Compt. Rend. Acad.
Bulg. Sci., Vol. 61 No. 9, pp. 1127-1132, 2008.
[6] I. Boevski, K. Genov, N. Boevska, K. Milenova, T. Batakliev, V.
Georgiev, Pen. Nikolov and D. K. Sarker," Low Temperature Ozone
Decomposition on Cu2+, Zn2+ and Mn2+-Exchanged Clinoptilolite"
Compt. Rend. Acad. Bulg. Sci., Vol. 64 No.1, pp. 33-38, 2011.
[7] P. Nikolov, K. Genov, P. Konova, K. Milenova, T. Batakliev, V.
Georgiev, N. Kumar, D. K. Sarker, D Pishev. and S. Rakovsky, "Ozone
decomposition on Ag/SiO2 and Ag/clinoptilolite catalysts at ambient
temperature" J. Hazard. Mater., Vol. 184 No. 1-3, pp. 16-19, 2010.
[8] A. Chakir, J. Bessiere, K. EL. Kacemi, and B.,Marouf. ÔÇ×A comparative
study of the removal of trivalent chromium from aqueous solutions by
bentonite and expanded perlite" J. Hazard. Mater., Vol. 95 No. 1-2, pp.
29-46, 2002.
[9] D.C. Lim, I. Lopez-Salido and Y.D. Kim, ÔÇ×Characterization of Ag
nanoparticles on Si wafer prepared using Tollen's reagent and acidetching"
Appl. Surf. Sci., Vol. 253 No.2, pp.959-965, 2006.
[10] Y. Dimitriev, B. Samuneva, I.M. Miranda Salvado, E Kashchieva. and
A. Bachvarova, ÔÇ× IR investigations of mullite, sinthesized by sol - gel
technology " J. Univ. Chem. Tech. Metall., Vol. 38 No1, pp. 31-36.
2003.
[11] K. Chakarova, E. Ivanova, K. Hadjiivanov, D Klissurski. and H.
Knözinger, ÔÇ×Co-ordination chemistry of palladium cations in Pd-HZSM-
5 as revealed by FTIR spectra of adsorbed and co-adsorbed probe
molecules (CO and NO)". Phys. Chem. Chem. Phys., Vol. 6 No 13, pp.
3702-3709, 2004.
[12] G. N. Waterhouse, G. A. Bowmaker and J.B. Metson, "Oxygen
chemisorption on an electrolytic silver catalyst: a combined TPD and
Raman spectroscopic study", Appl. Surf. Sci., Vol. 214 No. 1-4 pp. 36-
51, 2003.
[1] P. Nikolov, K. Genov, B. Ivanov, K Milenova. and I. Avramova, "Ozone
Decomposition on PdO-CeO2/ZSM-5 Catalyst."Compt. Rend. Acad.
Bulg. Sci., Vol. 62 No. 12, pp. 1515-1520, 2009.
[2] N. Kumar, P. Konova, A. Naydenov, T. Heikillä, T Salmi. and D. Yu.
Murzin, "Synthesis of Novel Ag Modified MCM-41 Mesoporous
Molecular Sieve and Beta Zeolite Catalysts for Ozone Decomposition at
Ambient Temperature" Catal. Lett. Vol. 98 No.1, pp. 57-60, 2004.
[3] N. Kumar, P. Konova, A. Naydenov, T. Salmi, D.Yu. Murzin, T
Heikillä. and V.-P. Lehto, "Ag-modified H-Beta, H-MCM-41 and SiO2:
Influence of support, acidity and Ag content in ozone decomposition at
ambient temperature" Cat. Today, Vol. 119 No. 1-4, pp. 342-346, 2007.
[4] A. Naydenov, P. Konova, Pen. Nikolov, F. Klingstedt, N. Kumar, D.
Kovacheva, P. Stefanov, R Stoyanova. and D. Mehandjiev,
"Decomposition of ozone on Ag/SiO2 catalyst for abatement of waste
gases emissions". Cat. Today, Vol. 137 No. 2-4, pp. 471-474, 2008.
[5] P. Nikolov, K Milenova. and D. Mehandjiev, "Decomposition of Ozone
over Pure and Doped with Cu and Mn Zinc Oxide", Compt. Rend. Acad.
Bulg. Sci., Vol. 61 No. 9, pp. 1127-1132, 2008.
[6] I. Boevski, K. Genov, N. Boevska, K. Milenova, T. Batakliev, V.
Georgiev, Pen. Nikolov and D. K. Sarker," Low Temperature Ozone
Decomposition on Cu2+, Zn2+ and Mn2+-Exchanged Clinoptilolite"
Compt. Rend. Acad. Bulg. Sci., Vol. 64 No.1, pp. 33-38, 2011.
[7] P. Nikolov, K. Genov, P. Konova, K. Milenova, T. Batakliev, V.
Georgiev, N. Kumar, D. K. Sarker, D Pishev. and S. Rakovsky, "Ozone
decomposition on Ag/SiO2 and Ag/clinoptilolite catalysts at ambient
temperature" J. Hazard. Mater., Vol. 184 No. 1-3, pp. 16-19, 2010.
[8] A. Chakir, J. Bessiere, K. EL. Kacemi, and B.,Marouf. ÔÇ×A comparative
study of the removal of trivalent chromium from aqueous solutions by
bentonite and expanded perlite" J. Hazard. Mater., Vol. 95 No. 1-2, pp.
29-46, 2002.
[9] D.C. Lim, I. Lopez-Salido and Y.D. Kim, ÔÇ×Characterization of Ag
nanoparticles on Si wafer prepared using Tollen's reagent and acidetching"
Appl. Surf. Sci., Vol. 253 No.2, pp.959-965, 2006.
[10] Y. Dimitriev, B. Samuneva, I.M. Miranda Salvado, E Kashchieva. and
A. Bachvarova, ÔÇ× IR investigations of mullite, sinthesized by sol - gel
technology " J. Univ. Chem. Tech. Metall., Vol. 38 No1, pp. 31-36.
2003.
[11] K. Chakarova, E. Ivanova, K. Hadjiivanov, D Klissurski. and H.
Knözinger, ÔÇ×Co-ordination chemistry of palladium cations in Pd-HZSM-
5 as revealed by FTIR spectra of adsorbed and co-adsorbed probe
molecules (CO and NO)". Phys. Chem. Chem. Phys., Vol. 6 No 13, pp.
3702-3709, 2004.
[12] G. N. Waterhouse, G. A. Bowmaker and J.B. Metson, "Oxygen
chemisorption on an electrolytic silver catalyst: a combined TPD and
Raman spectroscopic study", Appl. Surf. Sci., Vol. 214 No. 1-4 pp. 36-
51, 2003.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:60385", author = "Krassimir Genov and Vladimir Georgiev and Todor Batakliev and Dipak K. Sarker", title = "Ozone Decomposition over Silver-Loaded Perlite", abstract = "The Bulgarian natural expanded mineral obtained from Bentonite AD perlite (A deposit of "The Broken Mountain" for perlite mining, near by the village of Vodenicharsko, in the municipality of Djebel), was loaded with silver (as ion form - Ag+ 2 and 5 wt% by the incipient wetness impregnation method), and as atomic silver - Ag0 using Tollen-s reagent (silver mirror reaction). Some physicochemical characterization of the samples are provided via: DC arc-AES, XRD, DR-IR and UV-VIS. The aim of this work was to obtain and test the silver-loaded catalyst for ozone decomposition. So the samples loaded with atomic silver show ca. 80% conversion of ozone 20 minutes after the reaction start. Then conversion decreases to ca. 20 % but stay stable during the prolongation of time.
", keywords = "aluminum-silicates, Ag/perlite expanded glass,ozone decomposition", volume = "5", number = "8", pages = "727-4", }
