scholarly journals The Effect of Different Precursor Concentration on The Synthesis of CaO Nanoparticles with Coprecipitation Methods for Palm Oil Transesterification Catalysis

REAKTOR ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 45-51
Author(s):  
Novita Andarini ◽  
Ria Sherly Farida ◽  
Tanti Haryati
Keyword(s):  
Particle Size ◽  
Diffraction Pattern ◽  
Calcium Oxide ◽  
Palm Oil ◽  
Methyl Esters ◽  
Calcium Acetate ◽  
Precursor Concentration ◽  
Oxide Nanoparticles ◽  
Oxide Nanoparticle ◽  
Almost All

Calcium oxide nanoparticles was prepared by coprecipitation method using calcium acetate as precursor and calcined at 800 °C for 6 hours. This work studied the effect of different precursor concentrations on the size of calcium oxide obtained and its applicated for palm oil transesterification catalysis. Characteristics of samples were measured by XRD and SEM et al techniques. The results showed that the diffraction pattern of CaO has the same diffraction pattern as the XRD standard diffraction pattern from the Joint Committee on Powder Diffraction Standard (JCPDS). Calcium oxide analysis using SEM shows the morphology of particles that agglomerate almost all variations in precursor concentration. The particle size increases with increasing precursor concentration. The smallest particle size of 55.758 nm was produced on solid CaO from the lowest precursor concentration of 0.05 M. The catalytic activity of activated calcium oxide nanoparticle compound was tested in the production of methyl esters. The conversion of triglycerides in palm oil into methyl esters was 90.34%.Keywords: nanoparticles, calcium oxide, coprecipitation, precursor, catalys, metyl ester 

scholarly journals Effect of precursor concentration on size evolution of iron oxide nanoparticles

CrystEngComm ◽  
2017 ◽  
Vol 19 (44) ◽  
pp. 6694-6702 ◽  
Author(s):  
Hamed Sharifi Dehsari ◽  
Anielen Halda Ribeiro ◽  
Bora Ersöz ◽  
Wolfgang Tremel ◽  
Gerhard Jakob ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Precursor Concentration ◽  
Nanoparticle Size ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Size Evolution ◽  
Oxide Nanoparticle ◽  
Precursor Ratio

Changing the precursor concentration to tune the iron-oxide nanoparticle size alters the surfactant/precursor ratio and leads to the observation of two size regimes.

Characterisation and performance of three promising heterogeneous catalysts in transesterification of palm oil

2012 ◽  
Vol 66 (3) ◽  
Author(s):  
Wan Isahak ◽  
Manal Ismail ◽  
Jamaliah Jahim ◽  
Jumat Salimon ◽  
Mohd Yarmo
Keyword(s):  
Calcium Oxide ◽  
Palm Oil ◽  
Potassium Hydroxide ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Methyl Esters ◽  
Chemical Properties ◽  
Catalytic Performance ◽  
Product Formation ◽  
Reaction Products

AbstractIn this work, the performance of three heterogeneous catalysts, namely potassium hydroxide/γ-alumina, bulk calcium oxide, and nano-calcium oxide, in comparison with the homogeneous potassium hydroxide was studied in the transesterification of palm oil to produce methyl esters and glycerol. The physical and chemical properties of the heterogeneous catalysts were thoroughly characterised and determined using a number of analytical methods to assess their catalytic activities prior to transesterification. The reaction products were analysed using liquid chromatography and their properties were quantified based on the American Society of Testing and Materials and United State Pharmacopoeia standard methods. At the 65°C reaction temperature, the oil-to-methanol mole ratio of 1: 15, 2.5 h of the reaction time, and catalyst (φ r = 1: 40), potassium hydroxide, potassium hydroxide/γ-alumina, nano-calcium oxide, and bulk calcium oxide gave methyl ester yields of 97 %, 96 %, 94 %, and 90 %, respectively. The impregnation of γ-alumina with potassium hydroxide displayed a catalytic performance comparable with the performance of potassium hydroxide where the former could be physically separated via filtration resulting in a relatively greater purity of products. Other advantages included the longer reusability of the catalyst and more active sites with lower by-product formation.

Recalcification of Carious Lesion with Aids of Calcium Oxide Nanoparticles

2020 ◽  
Vol 23 (12) ◽  
Author(s):  
Bushra Habeeb Al-Maula ◽  
Suhad Jabbar Al-Nasrawi ◽  
Alaa Dakhil Yassir ◽  
Abtesam Imhemed Aljdaimi ◽  
Ruba Mansour Mustafa ◽  
...  
Keyword(s):  
Calcium Oxide ◽  
Oxide Nanoparticles ◽  
Carious Lesion

scholarly journals Reversible magnetism switching of iron oxide nanoparticle dispersions by controlled agglomeration

2021 ◽  
Author(s):  
Stephan Müssig ◽  
Björn Kuttich ◽  
Florian Fidler ◽  
Daniel Haddad ◽  
Susanne Wintzheimer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Light Scattering ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Dispersions ◽  
Oxide Nanoparticle

The controlled agglomeration of superparamagnetic iron oxide nanoparticles (SPIONs) was used to rapidly switch their magnetic properties. Small-angle X-ray scattering (SAXS) and dynamic light scattering showed that tailored iron oxide...

scholarly journals A critical review of synthesis parameters affecting the properties of zinc oxide nanoparticle and its application in wastewater treatment

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
E. Y. Shaba ◽  
J. O. Jacob ◽  
J. O. Tijani ◽  
M. A. T. Suleiman
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Zinc Oxide Nanoparticles ◽  
Textural Properties ◽  
Oxide Nanoparticles ◽  
Zinc Oxide Nanoparticle ◽  
Synthesis Parameters ◽  
Metal Precursors ◽  
Removal Of Heavy Metals ◽  
Oxide Nanoparticle

AbstractIn this era, nanotechnology is gaining enormous popularity due to its ability to reduce metals, metalloids and metal oxides into their nanosize, which essentially alter their physical, chemical, and optical properties. Zinc oxide nanoparticle is one of the most important semiconductor metal oxides with diverse applications in the field of material science. However, several factors, such as pH of the reaction mixture, calcination temperature, reaction time, stirring speed, nature of capping agents, and concentration of metal precursors, greatly affect the properties of the zinc oxide nanoparticles and their applications. This review focuses on the influence of the synthesis parameters on the morphology, mineralogical phase, textural properties, microstructures, and size of the zinc oxide nanoparticles. In addition, the review also examined the application of zinc oxides as nanoadsorbent for the removal of heavy metals from wastewater.

Preparation and characterization of calcium oxide nanoparticles from marine molluscan shell waste as nutrient source for plant growth

2021 ◽  
Author(s):  
Kabali Vijai Anand ◽  
Munuswamy Reshma ◽  
Malaichamy Kannan ◽  
Sekaran Muthamil Selvan ◽  
Sumit Chaturvedi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Calcium Oxide ◽  
Oxide Nanoparticles ◽  
Nutrient Source ◽  
Molluscan Shell ◽  
Shell Waste

Succinylated heparin monolayer coating vastly increases superparamagnetic iron oxide nanoparticle T2 proton relaxivity

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 12905-12914 ◽  
Author(s):  
Manman Xie ◽  
Shijia Liu ◽  
Christopher J. Butch ◽  
Shaowei Liu ◽  
Ziyang Wang ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Contrast Agents ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Clinical Use ◽  
History Of ◽  
Oxide Nanoparticle ◽  
Superparamagnetic Iron Oxide Nanoparticle

Superparamagnetic iron oxide nanoparticles (SPIONs) have a history of clinical use as contrast agents in T2 weighted MRI, though relatively low T2 relaxivity has caused them to fall out of favor as new faster MRI techniques have gained prominence.

Sign in / Sign up

Export Citation Format

Share Document