Graphene/nickel aerogel: an effective catalyst for the thermal decomposition of ammonium perchlorate

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 82112-82117 ◽  
Author(s):  
Yuanfei Lan ◽  
Bixin Jin ◽  
Jingke Deng ◽  
Yunjun Luo
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Perchlorate ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Gel Method ◽  
Sol Gel Method ◽  
Effective Catalyst

G/Ni aerogels were prepared by a sol–gel method and supercritical CO2 drying. They exhibit a remarkable catalytic performance for the thermal decomposition of AP.

scholarly journals Self-standing magnetic composite nanosheets prepared in the presence of an external magnetic field: Characterization and potential for medical applications

2020 ◽  
pp. 174751982095860
Author(s):  
Mina Sakuragi ◽  
Yoshikazu Takahashi ◽  
Keito Ehara ◽  
Katsuki Kusakabe
Keyword(s):  
Magnetic Field ◽  
Thermal Decomposition ◽  
External Magnetic Field ◽  
Decomposition Method ◽  
Sol Gel ◽  
Magnetic Composite ◽  
Magnetic Response ◽  
Gel Method ◽  
Sol Gel Method ◽  
Thermal Decomposition Method

The aim of this study is to develop self-standing, ultrathin film, nanosheets with high magnetic response for use in a medical device that can be migrated to a target location in the body by using an external magnetic field. First, iron oxide nanoparticles are synthesized by either the sol-gel method or thermal decomposition. The resulting magnetic properties of the nanoparticles show that the thermal decomposition method provides a greater saturation magnetization value than the sol-gel method. Next, the nanoparticles obtained by the thermal decomposition method are embedded into nanosheets of poly(L-lactide) at varying concentrations. Embedding of the nanoparticles in the composite nanosheets is achieved by the application of an external magnetic field. The composite nanosheets are then characterized. The thickness of the nanosheet increases, and the nanoparticles are well dispersed, with an increase in poly (L-lactide) concentration. The NP-embedded nanosheets are imaged by transmission electron microscopy, which reveals thin, long aggregates aligned in collinear line features. X-ray diffraction results indicate that the magnetic hard axis of the nanoparticles in the nanosheets is aligned in parallel to the plane of the nanosheet by magnetic field application during nanosheet preparation. In addition, the nanosheets at high poly (L-lactide) concentrations that had been subjected to a magnetic field during preparation show a slightly greater magnetic response compared with both nanosheets without magnetic field exposure and nanosheets prepared at low poly (L-lactide) concentrations.

Selective Reduction of NO with Propene over Ga2O3–Al2O3: Effect of Sol–Gel Method on the Catalytic Performance

2000 ◽  
Vol 192 (1) ◽  
pp. 137-148 ◽  
Author(s):  
Masaaki Haneda ◽  
Yoshiaki Kintaichi ◽  
Hiromichi Shimada ◽  
Hideaki Hamada
Keyword(s):  
Sol Gel ◽  
Selective Reduction ◽  
Catalytic Performance ◽  
Reduction Of No ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Mixed Metal Oxides of M1 MoVNbTeOx and TiO2 as Composite Catalyst for Oxidative Dehydrogenation of Ethane

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Yuxin Chen ◽  
Dan Dang ◽  
Binhang Yan ◽  
Yi Cheng
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Mixed Metal Oxides ◽  
Gel Method ◽  
Mixed Metal ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Oxidative Dehydrogenation Of Ethane

Composite catalysts of mixed metal oxides were prepared by mixing a phase-pure M1 MoVNbTeOx with anatase-phase TiO2. Two methods were used to prepare the composite catalysts (the simple physically mixed or sol-gel method) for the improvement of the catalytic performance in the oxidative dehydrogenation of ethane (ODHE) process. The results showed that TiO2 particles with a smaller particle size were well dispersed on the M1 surface for the sol-gel method, which presented an excellent activity for ODHE. At the same operating condition (i.e., the contact time of 7.55 gcat·h/molC2H6 and the reaction temperature of 400 °C), the M1-TiO2-SM and M1-TiO2-PM achieved the space time yields of 0.67 and 0.52 kgC2H4/kgcat/h, respectively, which were about ~76% and ~35% more than that of M1 catalyst (0.38 kgC2H4/kgcat/h), respectively. The BET, ICP, XRD, TEM, SEM, H2-TPR, C2H6-TPSR, and XPS techniques were applied to characterize the catalysts. It was noted that the introduction of TiO2 raised the V5+ abundance on the catalyst surface as well as the reactivity of active oxygen species, which made contribution to the promotion of the catalytic performance. The surface morphology and crystal structure of used catalysts of either M1-TiO2-SM or M1-TiO2-PM remained stable as each fresh catalyst after 24 h time-on-stream tests.

Catalytic performance of NO oxidation over LaMeO3 (Me = Mn, Fe, Co) perovskite prepared by the sol–gel method

2013 ◽  
Vol 37 ◽  
pp. 105-108 ◽  
Author(s):  
Jiahao Chen ◽  
Meiqing Shen ◽  
Xinquan Wang ◽  
Jun Wang ◽  
Yugeng Su ◽  
...  
Keyword(s):  
Sol Gel ◽  
Catalytic Performance ◽  
No Oxidation ◽  
Gel Method ◽  
Sol Gel Method

A highly active Pd/H-ZSM-5 catalyst in lean methane combustion prepared via a sol–gel method and treated by reduction–oxidation

2020 ◽  
Vol 44 (10) ◽  
pp. 3940-3949 ◽  
Author(s):  
Chao Fan ◽  
Li Yang ◽  
Li Luo ◽  
Zhiwei Wu ◽  
Zhangfeng Qin ◽  
...  
Keyword(s):  
Sol Gel ◽  
Methane Combustion ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Oxidation Treatment ◽  
Gel Method ◽  
Sol Gel Method ◽  
Highly Active ◽  
Metal Support ◽  
Metal Support Interactions

The reduction–oxidation treatment can reconstruct Pd nanoparticles, strengthen metal–support interactions and enhance catalytic performance of Pd/H-ZSM-5 in methane combustion.

scholarly journals The effects of calcination atmosphere on the catalytic performance of Ce-doped TiO2 catalysts for selective catalytic reduction of NO with NH3

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23348-23354 ◽  
Author(s):  
Yiqing Zeng ◽  
Shule Zhang ◽  
Yanan Wang ◽  
Guangli Liu ◽  
Qin Zhong
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Reduction Of No ◽  
Gel Method ◽  
Doped Tio2 ◽  
Sol Gel Method ◽  
Calcination Atmosphere

A series of well-reported Cex–Ti catalysts with a low content of Ce species were synthesized by a sol–gel method.

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