Template-free synthesis of mesoporous Mn3O4-Al2O3 catalyst for low temperature selective catalytic reduction of NO with NH3

Chao, Pei Yu; Hsu, Chun Han; Lin, Hong Ping

doi:10.1016/j.jtice.2018.12.006

Cited by 9 publications

(5 citation statements)

References 42 publications

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“…In other words, both metal ion precursors combine fully with the aluminum hydroxide. Notably, the N.D. condition of the Cu 2+ and Ni 2+ ions implies that both ions have concentrations of less than 0.1 ppm, and therefore satisfy the effluent standard in Taiwan (<1.0 ppm) [28,29]. Thus, the residual filtrate can be disposed of directly without the need for expensive and time-consuming waste treatment processing.…”

Section: Effect Of Ph On Kinetics Of Cu-ni/al 2 O 4 Formationmentioning

confidence: 99%

Synthesis of Mesoporous Cu-Ni/Al2O4 Catalyst for Hydrogen Production via Hydrothermal Reconstruction Route

et al. 2021

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Mesoporous Cu-Ni/Al2O4 catalyst of high surface area (176 m2g−1) is synthesized through a simple hydrothermal reconstruction process by using low-cost activated alumina as the aluminate source without organic templates. The desired mesoporous structure of the catalyst is formed by the addition of Cu2+ and Ni2+ metal ions in the gel solution of the activated alumina followed by hydrothermal treatment at 70 °C and calcination at temperatures in the range of 600 to 800 °C. To consider the environmental concern, we found the concentration of the Cu2+ and Ni2+ ion in the residual filtrate is less than 0.1 ppm which satisfies the effluent standard in Taiwan (<1.0 ppm). The effects of the pH value, hydrothermal treatment time, and calcination temperature on the structure, morphology and surface area of the synthesized Cu-Ni/Al2O4 composites are investigated as well. In addition, the Cu-Ni/Al2O4 catalyst synthesized at pH 9.0 with a hydrothermal treatment time of 24 h and a calcination temperature of 600 °C is used for hydrogen production via the partial oxidation of methanol. The conversion efficiency is found to be >99% at a reaction temperature of around 315 °C, while the H2 yield is 1.99 mol H2/mol MeOH. The catalyst retains its original structure and surface area following the reaction process, and is thus inferred to have a good stability. Overall, the hydrothermal reconstruction route described herein is facile and easily extendable to the preparation of other mesoporous metal-alumina materials for catalyst applications.

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Section: Effect Of Ph On Kinetics Of Cu-ni/al 2 O 4 Formationmentioning

confidence: 99%

Synthesis of Mesoporous Cu-Ni/Al2O4 Catalyst for Hydrogen Production via Hydrothermal Reconstruction Route

et al. 2021

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“…In the reaction solution of MBG, reacting molecules organize themselves into well-defined structures, leading to the creation of mesopores. This self-assembly process does not require any templates or surfactants, demonstrating the ability of solute molecules present in the reaction mixture of MBG to create mesopores in the MBG sample [61].…”

Section: Bet Analysismentioning

confidence: 96%

Eco-friendly synthesis of mesoporous bioactive glass ceramics and functionalization for drug delivery and hard tissue engineering applications

Tabassum,

Saqib,

Batool

et al. 2024

Biomed. Mater.

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Hard tissue regenerative mesoporous bioactive glass (MBG) has traditionally been synthesized using costly and toxic alkoxysilane agents and harsh conditions. In this study, MBG was synthesized using the cheaper reagent SiO2 by using a co-precipitation approach. The surface properties of MBG ceramic were tailored by functionalizing with amino and carboxylic groups, aiming to develop an efficient drug delivery system for treating bone infections occurring during or after reconstruction surgeries. The amino groups were introduced through a salinization reaction, while the carboxylate groups were added via a chain elongation reaction. The MBG, MBG-NH2, and MBG-NH-COOH were analyzed by using various techniques: X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The XRD results confirmed the successful preparation of MBG, and the FTIR results indicated successful functionalization. BET analysis revealed that the prepared samples were mesoporous, and functionalization tuned their surface area and surface properties. Cefixime, an antibiotic, was loaded onto MBG, MBG-NH2, and MBG-NH-COOH to test their drug-carrying capacity. Comparatively, MBG-NH-COOH showed good drug loading and sustained release behavior. The release of the drug followed the Fickian diffusion mechanism. All prepared samples displayed favorable biocompatibility at higher concentration in the Alamar blue assay with MC3T3 cells and exhibited the good potential for hard tissue regeneration, as carbonated hydroxyapatite formed on their surfaces in simulated body fluid (SBF).

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“…In this study, the Ni-Cu/Al2O3 catalysts were synthesized via a hydrothermal reconstructed method (Fig. S2) [35,36]…”

Section: Preparation Of Ni-cu/al2o3 Catalystsmentioning

confidence: 99%

“…According to Lin et al [35,36], Ni-Cu/Al2O3 compounds can be created through the interaction of metal ions and Al2O3 in an alkali environment around pH 9.0. After three hours of sintering at 600 °C, these compounds can be turned into metal oxidants that are suitable to catalyze These results suggest that porous Ni-Cu/Al2O3 catalysts are made without organic templates.…”

Section: Characterization Of Ni-cu/al2o3 Catalysts With Different Ni ...mentioning

confidence: 99%

“…More accessible and inexpensive, Ni-Cu composites can replace noble metals as catalysts in hydrogen-producing processes. Ni-Cu catalysts have been adopted in several processes such as ethanol steam reforming [32], methane decomposition [33], methane steam reforming [34], methane dry reforming [35,36], methanol partial oxidation [37], methanol decomposition [38], CO and CO2 hydrogenation [39],…”

Section: Introductionmentioning

confidence: 99%

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Statistical optimization of hydrogen production from bio-methanol steam reforming over Ni-Cu/Al2O3 catalysts

Chih

Chen

You

et al. 2023

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Template-free synthesis of mesoporous Mn3O4-Al2O3 catalyst for low temperature selective catalytic reduction of NO with NH3

Cited by 9 publications

References 42 publications

Synthesis of Mesoporous Cu-Ni/Al2O4 Catalyst for Hydrogen Production via Hydrothermal Reconstruction Route

Synthesis of Mesoporous Cu-Ni/Al2O4 Catalyst for Hydrogen Production via Hydrothermal Reconstruction Route

Eco-friendly synthesis of mesoporous bioactive glass ceramics and functionalization for drug delivery and hard tissue engineering applications

Statistical optimization of hydrogen production from bio-methanol steam reforming over Ni-Cu/Al2O3 catalysts

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