Effects of hydrogen peroxide co-precipitation and inert N<sub>2</sub> atmosphere calcination on CeZrLaNd mixed oxides and the catalytic performance used on Pd supported three-way catalysts

Cui, Meisheng; Hou, Yongke; Zhai, Zhizhe; Zhong, Qiang; Zhang, Yongqi; Huang, Xiaowei

doi:10.1039/c9ra01048c

Cited by 4 publications

(2 citation statements)

References 32 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method can increase particle dispersion, resulting in smaller and softer crystal grain, and enriches pore channel, so particles will find it easier to chemically bond with coating agents. 28 In addition, in regard to the functioning of AMPTS, a study conducted by Khosroshahi et al, 24 carried out sonication of the Fe3O4 particles before they were functional with AMPTS. Sonication allows big particles to break down into smaller fragments, or particles that are uniform in size in the solution, so Fe3O4 particles will find it easier to chemically bond with AMPTS.…”

Section: Discussionmentioning

confidence: 99%

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

Yohannes,

Djustiana,

Mardhian

et al. 2023

Padjadjaran J Dent Res Students

View full text Add to dashboard Cite

Introduction: Superparamagnetic iron oxide nanoparticles (SPION) have been used in MRI and have the capability to conjugate with different ligands. One of the active ingredients of interest in biomedical applications is curcumin (Cur), which has been sho wn to have anti-inflammatory effects, wound healing properties, and anti-cancer activity. However, such conjugation may need to be facilitated by polymers, such as 3-aminopropyltrimethoxysilane (AMPTS). This study aims to describe the effect of coating materials (AMPTS and Cur) on the physicochemistry of Fe3O4 particles as a diagnostic of oral cancer. Methods: this research employed descriptive research. Modified SPIONs were synthesized by a simple coprecipitation method. In a molar ratio of 2:1, Fe 3+ and Fe 2+ were dissolved and mixed in 40 ml of water. The mixture was then heated at 40 °C until a brown precipitate was formed. AMPTS and Curcumin (20 mg/ml DMSO) were added for modifications. Fe3O4 particles were characterized using Fourier transform infrared spectroscopy (FTIR) to analyze the conjugation yield. Modified SPIONs were analyzed using dynamic light scattering (DLS) to examine their size distribution. Furthermore, the zeta potential of the particles was examined. Results: DLS showed size increases after modification of SPION with different materials. In addition, there were slight changes in zeta potential. However, FTIR showed no differences in peaks, indicating that no conjug ation was successful. Conclusion: Although FTIR showed no differences in peaks, DLS and zeta potential showed changes with different coatings, which may indicate conjugation. However, further analyses must be carried out to quantify the conjugation yield.

show abstract

Section: Discussionmentioning

confidence: 99%

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

Yohannes,

Djustiana,

Mardhian

et al. 2023

Padjadjaran J Dent Res Students

View full text Add to dashboard Cite

show abstract

“…The dispersion of cobalt and manganese particles could be promoted by the addition of hydrogen peroxide during the catalyst preparation and enhances crystal grain growth. Cui et al [49] and Liu et al [42] also reported that the addition of H 2 O 2 could promote the dispersion of metal particles and improve the crystal grain growth, and this consequently resulted in the formation of mixed oxides with good thermal stability.…”

Section: ]mentioning

confidence: 99%

CoMn Catalysts Derived from Hydrotalcite-Like Precursors for Direct Conversion of Syngas to Fuel Range Hydrocarbons

Gholami¹,

Tišler²,

Velvarská³

et al. 2020

Catalysts

View full text Add to dashboard Cite

Two different groups of CoMn catalysts derived from hydrotalcite-like precursors were prepared through the co-precipitation method, and their performance in the direct production of gasoline and jet fuel range hydrocarbons through Fischer–Tropsch (FT) synthesis was evaluated in a batch autoclave reactor at 240 °C and 7 MPa and H2/CO of 2. The physicochemical properties of the prepared catalysts were investigated and characterized using different characterization techniques. Catalyst performance was significantly affected by the catalyst preparation method. The crystalline phase of the catalyst prepared using KOH contained Co3O4 and some Co2MnO4.5 spinels, with a lower reducibility and catalytic activity than cobalt oxide. The available cobalt active sites are responsible for the chain growth, and the accessible acid sites are responsible for the cracking and isomerization. The catalysts prepared using KOH + K2CO3 mixture as a precipitant agent exhibited a high selectivity of 51–61% for gasoline (C5–C10) and 30–50% for jet fuel (C8–C16) range hydrocarbons compared with catalysts precipitated by KOH. The CoMn-HTC-III catalyst with the highest number of available acid sites showed the highest selectivity to C5–C10 hydrocarbons, which demonstrates that a high Brønsted acidity leads to the high degree of cracking of FT products. The CO conversion did not significantly change, and it was around 35–39% for all catalysts. Owing to the poor activity in the water-gas shift reaction, CO2 formation was less than 2% in all the catalysts.

show abstract

Improving the catalytic activity in dry reforming reaction by enhancing the oxygen storage capacity of Ce0.8Zr0.2O2 support through hydrogen heat-treatment

Lee

Kim

Park

et al. 2022

Journal of CO2 Utilization

View full text Add to dashboard Cite

Effects of hydrogen peroxide co-precipitation and inert N₂ atmosphere calcination on CeZrLaNd mixed oxides and the catalytic performance used on Pd supported three-way catalysts

Abstract: Hydrogen peroxide oxidation improves the grains growth. Inert N2 atmosphere calcination reduces the particle size and enlarges the pore channels.

Cited by 4 publications

References 32 publications

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

CoMn Catalysts Derived from Hydrotalcite-Like Precursors for Direct Conversion of Syngas to Fuel Range Hydrocarbons

Improving the catalytic activity in dry reforming reaction by enhancing the oxygen storage capacity of Ce0.8Zr0.2O2 support through hydrogen heat-treatment

Contact Info

Product

Resources

About

Effects of hydrogen peroxide co-precipitation and inert N2 atmosphere calcination on CeZrLaNd mixed oxides and the catalytic performance used on Pd supported three-way catalysts

Abstract: Hydrogen peroxide oxidation improves the grains growth. Inert N2 atmosphere calcination reduces the particle size and enlarges the pore channels.

Cited by 4 publications

References 32 publications

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

The effect of (3-aminopropyl) triethoxysilane and curcumin coating on the physicochemistry of Fe 3 O 4 particles as theranostics of oral cancer: qualitative study descriptive

CoMn Catalysts Derived from Hydrotalcite-Like Precursors for Direct Conversion of Syngas to Fuel Range Hydrocarbons

Improving the catalytic activity in dry reforming reaction by enhancing the oxygen storage capacity of Ce0.8Zr0.2O2 support through hydrogen heat-treatment

Contact Info

Product

Resources

About

Effects of hydrogen peroxide co-precipitation and inert N₂ atmosphere calcination on CeZrLaNd mixed oxides and the catalytic performance used on Pd supported three-way catalysts