Role of glycine/nitrates ratio on structural and texture evolution of MgO-based nanocatalyst fabricated by hybrid microwave-impregnation method for biofuel production

Structural/texture evolution of CaO/MCM‐41 nanocatalyst by doping various amounts of cerium for active and stable catalyst: Biodiesel production from waste vegetable cooking oil

“…For producing the biodiesel from waste cooking oil, the Ce element was introduced into the MCM-41 framework with different Si/Ce ratio (5,10,25,50, and Ce = 0) via conventional hydrothermal method, and the CaO was sonochemically loaded on them. The characteristic XRD and BET analysis of the fabricated nanocatalysts demonstrated slightly reduction of the crystallinity of MCM-41 and CaO and a sharp descend of the SSA while augmenting the cerium content in MCM-41.…”

“…There are many challenges in designing the heterogeneous biodiesel catalysts such as diffusion resistance of great triglyceride molecules, specific surface area (SSA), and catalyst deactivation . Some of these problems could be solved by employing an appropriate catalytic support .…”

“…20,22 There are many challenges in designing the heterogeneous biodiesel catalysts such as diffusion resistance of great triglyceride molecules, specific surface area (SSA), and catalyst deactivation. [23][24][25] Some of these problems could be solved by employing an appropriate catalytic support. 13,26,27 MCM-41, with a significant surface area and mesoporous structure, is a good candidate for support that could be used in several cycles of reaction because of its thermal and mechanical stability.…”

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In present work, the aim of producing biodiesel from waste cooking oil was pursued by doping the cerium element into the MCM-41 framework as catalyst with various Si/Ce molar ratio (5,10,25,50, and Ce = 0). The catalytic performance and stability improved by employing the ultrasound irradiation in active phase loading step of catalyst preparation.

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Porous Carbon Networks Decorated with Cobalt on CoFe2O4 as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

“…The increased porosity and surface area are attributed to (glycine/nitrate) ratio as well as (cobalt nitrate/iron nitrate) ratio in the combustion mixture at the ignition temperature of the glycine. Youse et al., and Liu et al., have recently reported that the (glycine/nitrate) had profound effect on the final product and its physicochemical properties . The increased porosity and enhanced surface area along with Co nanoparticle on the amorphous carbon matrix led to more electrochemical active sites and helped to accommodate discharge products in the Li‐air battery.…”