Synthesis, characterization, and evaluation of TiMgAlCu mixed oxides as novel SO  removal catalysts

Li, BaoShuo; Yuan, Shiling

doi:10.1016/j.ceramint.2014.03.112

Cited by 9 publications

(5 citation statements)

References 40 publications

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“…Table 1 shows the results of surface area, total volume, and mean pore diameter of the synthesized solids. The mean diameter of the samples is in the range of 2 to 50 nm assigning them mesoporous materials [22]. The N 2 adsorption-desorption isotherms that were obtained for the materials in all cases were type IV according to IUPAC classification, where a slow increase in the adsorption process can be observed, followed by a rapid adsorption typical of mesoporous materials.…”

Section: Characterizationmentioning

confidence: 88%

“…Harmonic reflections corresponding to planes (006), (009), (012), (015), and (110) can also be observed at 22.0, 34.6, 38.2, 47.8, and 61.0 o 2θ, respectively (JCPDS 00-014-0191) [21]. The diffraction pattern for CLDH ( Figure 2) shows the characteristic peaks of periclase MgO with crystallographic planes (200) and (220) at 42.9 and 62.3 o 2θ, respectively (JCPDS 00-003-0998), which correspond to crystals of a MgAl mixed oxide associated with the collapse of the laminar structure of the LDH [21,22]. Figure 3 shows the X-ray diffraction patterns for the synthesized TiO 2 -LDH composites.…”

Section: Characterizationmentioning

confidence: 99%

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Influence of the Synthesis Method on the Preparation Composites Derived from TiO2-LDH for Phenol Photodegradation

Contreras-Ruiz¹,

Martínez-Gallegos²,

Rivas³

et al. 2018

Titanium Dioxide - Material for a Sustainable Environment

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Three different TiO 2 catalysts are prepared using different methods. MgAl-CO 3 2− layered double hydroxides (LDH) were obtained by the sol-gel method. In the preparation of the composites, the three photocatalysts were combined with LDH following different methodologies. The composites were characterized using X-ray diffraction (XRD), specific surface area (SA), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The influence of the synthesis method on the preparation of the composites was evaluated by analyzing their photocatalytic activity against phenol as a model organic pollutant under UV irradiation. The photocatalytic activity of the composites improves when the chemical interaction, determined by XPS, between the TiO 2 and the LDH decreases. The same happens when the ratio of the anatase-rutile phases, determined by XRD, approaches optimum (80:20%). The effect of the composite concentration in the solution (0.5-2.0 g/L) was investigated, and the light-shielding phenomenon due to high composite concentration decreases the phenol photodegradation. The reduction of photocatalytic activity in reuse cycles is due to loss and partial deactivation of the material. The elimination of phenol is attributed primarily to the photocatalytic process due to the generation of • OH radicals and to a lesser extent the adsorption process also present in the samples.

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Section: Characterizationmentioning

confidence: 88%

Section: Characterizationmentioning

confidence: 99%

Influence of the Synthesis Method on the Preparation Composites Derived from TiO2-LDH for Phenol Photodegradation

Contreras-Ruiz¹,

Martínez-Gallegos²,

Rivas³

et al. 2018

Titanium Dioxide - Material for a Sustainable Environment

View full text Add to dashboard Cite

show abstract

“…Yuan et al. [ 21 ] studied the influence of physical and chemical properties including crystal structure, element composition, and pore size distribution, on the desulfurization performance of multiple metal oxide composites. The physical and chemical structure and characteristics of the composites exhibiting the best desulfurization performance were studied to inform the preparation process and technology of several metal oxide composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission

Li¹,

Huhe²,

Zeng³

et al. 2022

Heliyon

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“…Environmental catalysis is a sustainable tool for the control of several pollutants. It has been successfully used for the removal of some air pollutants as NO x , VOCs, etc [1–7] . Nevertheless the use of catalysis for the control of water pollutants is not easy because for a commercial use, the catalyst must be active at room temperature and atmospheric pressure and must be very stable avoiding metal leaching.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Support Nature and the Metal Precursor in the Activity of Pd‐based Catalysts for the Bromate Reduction Reaction

et al. 2021

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Palladium catalysts supported on different materials (alumina, activated carbon and mixed oxide derived from hydrotalcite) and prepared with different metal precursors (nitrate, chloride and acetate) have been characterized and tested for the bromate reduction reaction. The catalytic behavior depends on the support nature and on the metallic precursor used for the catalyst preparation. Pd catalyst supported on a mixed oxide has a low activity due to the high affinity of the reconstructed support for the Br− formed, preventing the reactants to approximate the active Pd sites. Pd catalyst supported on activated carbon has a surface negative charge and a microporous structure, making difficult the interaction of the active sites with the reactants. The best results are obtained with the catalyst supported on alumina due to its physical‐chemical properties, i. e. mesoporosity, positive surface charge and reversible adsorption of reactants and products. These characteristics make easy bromate and H2 adsorption on the active sites and subsequent reaction, thus resulting in a better activity. The Pd precursor salt also influences the catalytic activity as it has an effect on the Pd nanocrystal size. The best results are obtained with the metal precursor that produces homogeneous and large Pd metallic crystallites.

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Synthesis, characterization, and evaluation of TiMgAlCu mixed oxides as novel SO removal catalysts

Cited by 9 publications

References 40 publications

Influence of the Synthesis Method on the Preparation Composites Derived from TiO2-LDH for Phenol Photodegradation

Influence of the Synthesis Method on the Preparation Composites Derived from TiO2-LDH for Phenol Photodegradation

Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission

The Influence of the Support Nature and the Metal Precursor in the Activity of Pd‐based Catalysts for the Bromate Reduction Reaction

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