Modified Pechini Synthesis of Oxide Powders and Thin Films

Sunde, Tor Olav Løveng; Grande, Tor; Einarsrud, Mari‐Ann

doi:10.1007/978-3-319-32101-1_130

Cited by 22 publications

(27 citation statements)

References 145 publications

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“…Formation of intermediate carbonates occurs as a result of chemisorption of CO 2 , a volatile product from decomposition of organics, by a fraction of metal oxides. This behavior was clearly observed in Figure 2 b as a long tail after the last peak of polymeric matrix decomposition [ 64 , 65 , 66 ].…”

Section: Resultsmentioning

confidence: 82%

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

2020

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In this work, a first study on kinetics and thermodynamics of thermal decomposition for synthesis of doped LiMn2O4 nanoparticles is presented. The effect of Mg doping concentration on thermal decomposition of synthesis precursors, prepared by ultrasound-assisted Pechini-type sol–gel process, and its significance on nucleation and growth of Mg-doped LiMn2O4 nanoparticles was studied through a method based on separation of multistage processes in single-stage reactions by deconvolution and transition state theory. Four zones of thermal decomposition were identified: Dehydration, polymeric matrix decomposition, carbonate decomposition and spinel formation, and spinel decomposition. Kinetic and thermodynamic analysis focused on the second zone. First-order Avrami-Erofeev equation was selected as reaction model representing the polymer matrix thermal decomposition. Kinetic and thermodynamic parameters revealed that Mg doping causes an increase in thermal inertia on conversion rate, and CO2 desorption was the limiting step for formation of thermodynamically stable spinel phases. Based on thermogravimetry experiments and the effect of Mg on thermal decomposition, an optimal two-stage heat treatment was determined for preparation of LiMgxMn2-xO4 (x = 0.00, 0.02, 0.05, 0.10) nanocrystalline powders as promising cathode materials for lithium-ion batteries. Crystalline structure, morphology, and stoichiometry of synthesized powders were characterized by XRD, FE-SEM, and AAS, respectively.

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Section: Resultsmentioning

confidence: 82%

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

2020

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“…The TiO 2 used was high-purity and analytical grade (Merck, reference 1008081000). The CuO nanoparticles were synthesized from copper acetate ((CH 3 COO) 2 Cu·H 2 O) using the modified Pechini method [40] (Figure 1). To evaluate the cementitious properties, the pastes and mortars were prepared.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the Antibacterial Activity of a Geopolymer Mortar Based on Metakaolin Supplemented with TiO2 and CuO Particles Using Glass Waste as Fine Aggregate

et al. 2020

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Metakaolin-based geopolymer cements were produced by alkaline activation with a potassium hydroxide and potassium silicate solution. To produce the geopolymer composites, 10 wt.% titanium oxide (TiO 2 ) and 5 wt.% copper oxide (CuO) nanoparticles were used. The geopolymer mortar was prepared using glass waste as fine aggregate. The raw materials and materials produced were characterized by X-ray diffraction, electron microscopy, and Fourier-transform infrared spectroscopy techniques. Likewise, the geopolymer samples were characterized to determine their physical properties, including their density, porosity, and absorption. The photocatalytic activity of the materials was evaluated by activating the nanoparticles in a chamber with UV-Vis light during 24 h; then, different tests were performed to determine the growth inhibition of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa bacteria in nutrient agar for times of up to 24 h. The study results showed that a geopolymer mortar containing glass waste as fine aggregate (GP-G) exhibited a water absorption 56.73% lower than that of the reference geopolymer paste without glass (GP). Likewise, glass particles allowed the material to have a smoother and more homogeneous surface. The pore volume and density of the GP-G were 37.97% lower and 40.36% higher, respectively, than those of the GP. The study with bacteria showed that, after 24 h in the culture media, the GP-G mortars exhibited a high inhibition capacity for the growth of P. aeruginosa from solutions of 10 −4 mL and in solutions of 10 −6 mL for E. coli and S. aureus. These results indicate the possibility of generating antibacterial surfaces by applying geopolymer composite.

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“…The perovskite powders were synthesized by a Pechini-derived method [28,29] LSM powders (with or without Mg or Al dopant) were first prepared by the P1 method. The mixture of nitrate salts and CA (CA:M = 1.5:1) was heated to 60 °C and stirred for 10 min.…”

Section: Materials Synthesismentioning

confidence: 99%

“…Liquid phase Pechini-methods are particularly relevant for preparing either ceramic nanopowders or thin films with uniform composition and microstructure, even for complex material formulations [28,29]. For each given composition, the structure, microstructure and surface properties of the powders are key-parameters determining their reactivity for both sintering and redox reactions.…”

Section: Introductionmentioning

confidence: 99%

Lanthanum manganite perovskite ceramic powders for CO2 splitting: Influence of Pechini synthesis parameters on sinterability and reactivity

Jouannaux

Haeussler

Drobek

et al. 2019

Ceramics International

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Modified Pechini Synthesis of Oxide Powders and Thin Films

Cited by 22 publications

References 145 publications

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

Evaluation of the Antibacterial Activity of a Geopolymer Mortar Based on Metakaolin Supplemented with TiO2 and CuO Particles Using Glass Waste as Fine Aggregate

Lanthanum manganite perovskite ceramic powders for CO2 splitting: Influence of Pechini synthesis parameters on sinterability and reactivity

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