Effect of Metals Oxides Loading on the Modification of Microstructure and Phase Transformation of Nanocrystalline CeZrO2 Synthesized Using Water-in-oil-Microemulsion

Hâdi, Abdul; Ismail, Khudzir; Shah, M. Nazri Abu

doi:10.1016/j.sbspro.2015.06.227

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…The primary peak's breadth reveals the size of the crystallites, both large and small. The wide peaks are linked to enormous crystallite size, and vice versa (Hadi et al 2015 ; Jani et al 2013 ). In addition, the mixed oxide composite's XRD pattern shows that CeO 2 and ZrO 2 coexisted in their distinctive peak locations, indicating that both ZrO 2 and CeO 2 were present in the composite (homogenous composite).…”

Section: Resultsmentioning

confidence: 99%

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Rouf,

Ramli,

Anuar

et al. 2023

Bioresour. Bioprocess.

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Since petroleum became depleted, rapid attention has been devoted to renewable energy sources such as lignocellulosic biomass to produce useful chemicals for industry (for instance vanillin). Three primary components of lignocellulose are lignin, cellulose, and hemicellulose. This paper uses microwave-assisted technology to oxidize the kenaf stalk (lignocellulosic biomass) and extract lignin to produce vanillin. Catalysts with variable acid–base and redox properties are essential for the mentioned effective conversion, for this reason, CeO2–CA, ZrO2–CA, and CeZrO2–CA catalysts were synthesized. The citrate complexation method was used for the catalyst synthesis and the physicochemical characteristics were analyzed by XRD, FTIR, FE–SEM, TEM, BET, and TPO. The characterization results demonstrated that CeZrO2–CA shows the smallest sized crystallites with a large specific surface area among the other chosen catalysts. For vanillin production, the effect of reaction temperature, reaction time, and catalyst loading was studied. It was observed that compared to other catalysts, CeZrO2–CA produced the highest vanillin yield of 9.90% for kenaf stalk for 5 wt% of CeZrO2–CA at 160 °C for 30 min. Furthermore, vanillin production using extracted lignin is studied keeping CeZrO2–CA as a catalyst and with the same operating parameters, which yielded 14.3% of vanillin. Afterward, the change in yield with respect to pH is also presented. Finally, the recyclability of catalyst is also studied, which showed that it has a strong metal support and greater stability which may give industrial applications a significant boost. Graphical Abstract

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Section: Resultsmentioning

confidence: 99%

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Rouf,

Ramli,

Anuar

et al. 2023

Bioresour. Bioprocess.

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“…mal stability of the catalyst [29]. Such a three-way catalyst (TWC) has been prepared by Shah et al [30], who supported CuO particles on CesZrO 2 .…”

Section: Properties and Uses Of Microemulsionsmentioning

confidence: 99%

Microemulsion Route for the Synthesis of Nano-Structured Catalytic Materials

Hussain¹,

Batool²

2017

Properties and Uses of Microemulsions

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Owing to their unique properties, use of microemulsion-based synthetic techniques for the generation of shape-controlled nanocatalyst is an area of great current interest. Nanocatalysts of any specific shape, morphology, surface area, size, geometry, homogeneity and composition are widely being prepared using the soft techniques of microemulsion. Easy handling, inexpensive equipment and mild reaction conditions make microemulsion an attractive reaction medium. Herein, a nanosized precursor reactant can be incorporated, leading to the formulation of a highly monodispersed metal nanoagglomerate with controlled size, shape and composition. Several factors such as presence of electrolyte, molar ratio of water to surfactant, nature and concentration of surfactant and solvent, size of water droplets and concentration of reducing agents influence the size of the nanoparticles. The reverse micelle method can be used for the fabrication of several nanosized catalysts with a diverse variety of suitable materials including silica, alumina, metals (e.g. Au, Pd, Rh, Pt), metal oxides, etc. The morphology, size distribution and shape of the nanocatalysts make them useable for a wide range of applications, for example, fuel cells, electrocatalysis, photocatalysis, environmental protection, etc. The recovery of nanoparticles from the reaction mixture is a challenge for the researchers. This chapter discusses the preparation of nanoparticles using microemulsion techniques, widely being used for the synthesis of nanocatalysts from a wide range of materials.

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“…17 Therefore, the valance of Ce ion affects the cerium zirconium mixed oxides. Many studies are currently focused on high-energy mechanical milling, 18 template assisted, 19 hydrothermal treatment, 20 microemulsion, 21 and supercritical alcohols, 22 for the process of preparing cerium zirconium mixed oxides. However, the calcination process, and even the inert atmosphere calcination have not been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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Effect of Metals Oxides Loading on the Modification of Microstructure and Phase Transformation of Nanocrystalline CeZrO2 Synthesized Using Water-in-oil-Microemulsion

Cited by 8 publications

References 26 publications

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Microemulsion Route for the Synthesis of Nano-Structured Catalytic Materials

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

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Effect of Metals Oxides Loading on the Modification of Microstructure and Phase Transformation of Nanocrystalline CeZrO2 Synthesized Using Water-in-oil-Microemulsion

Cited by 8 publications

References 26 publications

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Ce–Zr-based mixed oxide catalyst for oxidative depolymerization of kenaf stalk (biomass) into vanillin

Microemulsion Route for the Synthesis of Nano-Structured Catalytic Materials

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

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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