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EEFFECT OF PARTICLE SIZE ON THE PHOTOCATALYTIC ACTIVITY OF MODIFIED RUTILE SAND (TIO2) FOR THE DISCOLORATION OF METHYLENE BLUE IN WATER

The advanced oxidation process (AOP) has been identified as a promising technology for pollutant degradation. To maximize the performance of this process, new materials need to be found or existing materials need to be modified. In this work, the effect of the particle size of modified rutile materials on the photocatalytic discoloration of methylene blue was investigated. Rutile samples with different particle sizes were obtained by milling, and the photocatalytic reaction was carried out in a continuous magnetic stirring photoreactor under UV–vis illumination…

Retamoso, C, Escalona, N., González, M., Barrientos, L., Allende-González, P., Stancovich, R., Serpell, R., Fierro, J.L.G., López, M. Journal of Photochemistry and Photobiology A: Chemistry 2019, 378, 136-141.

ENHANCED BIMETALLIC RH-NI SUPPORTED CATALYSTS ON ALUMINA DOPED WITH T MIXED LANTHANUM-CERIUM OXIDES FOR ETHANOL STEAM REFORMING

Enhanced bimetallic Rh (0.25, 0.5, 0.75, 1.0 wt%)-Ni 10 wt%) promoted with La2O3(15 wt%) and CeO2(10 wt%)/alumina supported catalysts for ethanol steam reforming compared to their monometallic counterparts is reported…

Campos, C.H., Pecchi, G., Fierro, J. L. G., Osorio-Vargas, P. Enhanced bimetallic rh-ni supported catalysts on alumina doped with t mixed lanthanum-cerium oxides for ethanol steam reforming. Molecular Catalysis 2019, 469, 87-97.

VISIBLE LIGHT ASSISTED PHOTODEGRADATION OF THIMEROSAL BY HIGH PERFORMANCE T ZNFE2O4/POLY(O-PHENYLENEDIAMINE) COMPOSITE

Thimerosal is a mercury-based preservative that is used in pharmaceuticals, vaccines and health-care products. However, thimerosal toxicity has been well explored and hence it should be properly treated for avoiding its occurrence in the environment…

Sandoval, C., Ranganathan, S., Ramírez, E., Mansilla, H.D., Dinamarca, R., Pecchi, G., Yáñez, J. Visible light assisted photodegradation of thimerosal by high performance t znfe2o4/poly(o-phenylenediamine) composite. Materials Research Bulletin 2019, 116, 8-15. 

SELECTIVE OXIDATION OF CYCLOHEXANE TO CYCLOHEXANOL BY BIOI UNDER VISIBLE T LIGHT: ROLE OF THE RATIO (1 1 0)/(0 0 1) FACET

The development of semiconductors capable of photocatalytic activity under visible light is very important, because such materials are potentially useful for performing photocatalytic conversion under solar illumination…


Contreras, D., Melin, V., Márquez, K., Pérez-González, G., Mansilla, H. D., Pecchi, G., Henríquez, A. Selective oxidation of cyclohexane to cyclohexanol by bioi under visible t light: role of the ratio (1 1 0)/(0 0 1) facet. Applied Catalysis B: Environmental 2019, 251, 17-24.

 

SUNLIGHT PHOTOACTIVITY OF RICE HUSK-DERIVED BIOGENIC SILICA

Carbon-containing SiO2-based photocatalysts were prepared by the solvothermal treatment of rice husk as biogenic precursor in the presence and absence of TiO2 and used for the photocatalytic degradation of rhodamine-B under simulated solar light. Data showed that the prepared catalysts are mainly composed of biogenic silica and displayed mesoporous character with surface areas ranging from 65 to 174 m2 g-1…

Fernández de Cordoba, M. C., Matos, J., Montaña, R., Poon, S. P., Lanfredi, S., Praxedes, F. R.,
Hernández-Garridoe, J.C., Calvino, J.J. Rodríguez-Aguado, E., Rodríguez-Castellón, E., Aniab, C.O. Sunlight photoactivity of rice husks-derived biogenic silica. Catalysis Today 2019, 328, 125-135.
 

C-DOPED ANATASE TIO2: ADSORPTION KINETICS AND PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE AND PHENOL, AND CORRELATIONS WITH DFT ESTIMATIONS

This work shows an easy and eco-friendly methodology to obtain almost pristine anatase phase of TiO2 by using furfural, a biomass-derived molecule, as a bio-template. The photocatalytic activity was studied following the degradation of methylene blue and phenol under artificial solar irradiation. Results were compared against those obtained on a commercial pristine anatase TiO2…

Matos, J., Ocares-Riquelme, J., Poon, P.S., Montaña, R., García, X., Campos, K., Hernández-Garrido, J.C. Titirici, M. M. C-doped anatase TiO2: Adsorption kinetics and photocatalytic degradation of methylene blue and phenol, and correlations with DFT estimations. Journal of Colloid and Interface Science 2019, 547, 14-29.

 

MAGNETIC FE2O3–SIO2–MEO2–PT (ME = TI, SN, CE) AS CATALYSTS FOR THE SELECTIVE HYDROGENATION OF CINNAMALDEHYDE. EFFECT OF THE NATURE OF THE METAL OXIDE 

The type of metal oxide affects the activity and selectivity of Fe2O3–SiO2–MeO2–Pt (Me = Ti, Sn, Ce) catalysts on the hydrogenation of cinnamaldehyde. The double shell structure design is thought to protect the magnetic Fe2O3 cores, and also act as a platform for depositing a second shell of TiO2, SnO2 or CeO2 metal oxide…

Dinamarca, R.; Espinoza-González, R.; Campos, C.H.; Pecchi, G. Magnetic Fe2O3–SiO2–MeO2–Pt (Me = Ti, Sn, Ce) as Catalysts for the Selective Hydrogenation of Cinnamaldehyde. Effect of the Nature of the Metal Oxide. Materials 2019, 12, 413.  

EFFECT OF RE CONTENT AND SUPPORT IN THE LIQUID PHASE CONVERSION OF FURFURAL TO FURFURYL ALCOHOL AND 2-METHYL FURAN OVER REOX CATALYSTS

Supported rhenium oxide catalysts with different Re loadings (0.5–1.8 Re atom nm−2) and supports (SiO2, γ-Al2O3 and SiO2-Al2O3) were tested for the liquid-phase conversion of furfural at 150–250 °C and 3–5 MPa H2 pressure. The reaction yielded furfural alcohol and 2-methylfuran as main products, the selectivity of which varied significantly with reaction temperature and H2 pressure…

F. Toledo, I.T. Ghampson, C. Sepúlveda, R. García, J.L.G. Fierro, A. Videla, R. Serpell, N. Escalona. Effect of Re content and support in the liquid phase conversion of furfural to furfuryl alcohol and 2-methyl furan over ReOx catalysts. Fuel 2019, 242, 532-544.

A STUDY OF HYDRODEOXYGENATION OF ANISOLE OVER RE-MEOX/TIO 2 CATALYST

A well-characterized Re-MoO x /TiO 2 catalyst was used to investigate the reaction sequence involved during the hydrodeoxygenation of anisole in a batch reactor by varying the initial anisole concentration in the reactant mixture (0.182–0.382 mol L −1 corresponding to 2.6–5.4 wt.%), the reaction temperature (250–325 °C) and hydrogen pressure (30–60 bar)…

Tyrone Ghampson, Roberto Canales, Néstor Escalona. “A study of hydrodeoxygenation of anisole over Re-MeOx/TiO 2 catalyst”. Applied Cataysis A, General 549 (2018) 225-236.

CATALYTIC HYDRODEOXYGENATION OF ANISOLE OVER REMOOX/TIO 2 AND RE-VOX/TIO 2 CATALYSTS 

The hydrodeoxygenation of anisole at 300 °C and 3 MPa H 2 in a batch reactor is used as a model reaction to explore the performance of TiO 2 -supported Re-MoO x and Re-VO x catalysts. The binary catalysts were prepared with different Re and MoO x (or VO x ) loadings and characterized by nitrogen physisorption, ICP-MS and AAS, XRD, FTIR, H 2 -TPR, NH 3 – TPD, H 2 -TPD, TEM and XPS techniques…

I. T. Ghampson, G. Pecchi, J.L.G. Fierro, A. Videla, N. Escalona “Catalytic hydrodeoxygenation of anisole over ReMoOx/TiO 2 and Re-Vox/TiO 2 catalysts” Applied Catalysis B: Enviromental 208 (2017) 60-74.

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