Hydroxyapatite nanoparticles produced by direct precipitation method: Optimization and characterization studies

2021 ◽  
Author(s):  
Hor Wee Fern ◽  
M. N. Salimi
Keyword(s):  
Precipitation Method ◽  
Hydroxyapatite Nanoparticles ◽  
Direct Precipitation ◽  
Method Optimization ◽  
Characterization Studies ◽  
Direct Precipitation Method

Preparation of Nanoscale CuO Powders

2010 ◽  
Vol 113-116 ◽  
pp. 1770-1773 ◽  
Author(s):  
Xi Hua Zhao ◽  
Min Xu
Keyword(s):  
Raw Materials ◽  
Precipitation Method ◽  
Optimum Conditions ◽  
Muffle Furnace ◽  
Factors Affecting ◽  
Direct Precipitation ◽  
Average Grain Size ◽  
Scherrer Formula ◽  
Average Size ◽  
Direct Precipitation Method

Cu(OH)2 precursor was synthesized by direct precipitation method and CuSO4 and NaOH were used as raw materials. Then, Cu(OH)2 precursor was calcined in muffle furnace at 400°C for 2h in order that CuO particle was obtained. Through the analysis of the factors affecting the CuO, the paper determined the optimum conditions for the synthesis of nano-CuO with the direct-precipitation method. Then the paper analyzed phase composition and crystal structure of samples using XRD and calculated the average grain size of samples by Scherrer formula, and observed and analyzed by TEM to characterize the morphology and particle size of samples. The optimum precipitation conditions are as follows: when the precipitation agent is 3.2:1, reaction time 40min and precipitant concentration 0.6mol.L-1. The average size of CuO particle prepared under the conditions is 18nm and the yield is 96%.

One-step growth of isoreticular luminescent metal–organic frameworks on cotton fibers

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15198-15204 ◽  
Author(s):  
R. R. Ozer ◽  
J. P. Hinestroza
Keyword(s):  
Metal Organic Frameworks ◽  
Precipitation Method ◽  
Cotton Fibers ◽  
Direct Precipitation ◽  
Metal Organic ◽  
One Step ◽  
Lanthanide Metal ◽  
Step Growth ◽  
Direct Precipitation Method ◽  
Temperature Water

A series of isoreticular lanthanide metal–organic frameworks, Ln-MOFs (Ln = Eu, Gd, and Tb), were directly grown on cotton fibers using a room temperature water-based direct precipitation method.

Transesterification of Jatropha Oil to Biodiesel by Using Catalyst Containing Ca(C3H7O3)2 as a Solid Base Catalyst

2013 ◽  
Vol 666 ◽  
pp. 93-102 ◽  
Author(s):  
Chang Jun Li ◽  
Zhi Wei Huang ◽  
Yu Jie He ◽  
Dong Zhou ◽  
Cheng Du ◽  
...  
Keyword(s):  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Solid Base ◽  
Jatropha Oil ◽  
Direct Precipitation ◽  
Acid Methyl ◽  
Direct Precipitation Method ◽  
C Nmr

An direct precipitation method of Calcium glyceroxide Ca(C3H7O3)2 was proposed. The prepared Ca(C3H7O3)2 was effective in transesterification of Jatropha oil into fatty acid methyl esters (FAME). The Ca(C3H7O3)2 catalysts were characterized by using XRD, solid state 13C-NMR, FTIR, and Hammett indicator. The influence of various reaction variables on the conversion was investigated. Under a condition of methanol/oil molar ratio of 9:1, a catalyst amount of 4 wt %, reaction time of 1.5 h, and reaction temperature of 65 °C, over 95% of biodiesel yield was obtained.

A simple approach for the synthesis of bi-functional Fe3O4@MgO core–shell nanoparticles with magnetic-microwave to heat responsive properties

2016 ◽  
Vol 40 (9) ◽  
pp. 7911-7916 ◽  
Author(s):  
Hongxia Peng ◽  
Xiang Wang ◽  
Chuanyue Hu ◽  
Jilin Hu ◽  
Xiuying Tian
Keyword(s):  
Simple Approach ◽  
Precipitation Method ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Mgo Nanoparticles ◽  
Direct Precipitation ◽  
Core Shell Nanoparticles ◽  
Direct Precipitation Method

We prepared Fe3O4@MgO nanoparticles with magnetic and microwave to heat responsive properties by a direct precipitation method.

Direct preparation of [(CH3)3NC16H33]4Mo8O26 and its catalytic performance in oxidative desulfurization

2016 ◽  
Vol 6 (4) ◽  
pp. 1016-1024 ◽  
Author(s):  
Xiangwen Zhang ◽  
Yawei Shi ◽  
Guozhu Liu
Keyword(s):  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Direct Precipitation ◽  
Direct Preparation ◽  
Direct Precipitation Method

The catalyst [(CH3)3NC16H33]4Mo8O26 has been synthesized by a direct precipitation method and shows efficient oxidative desulfurization performance.

Preparation of Ni(OH)2 nanosheets on Ni foam via a direct precipitation method for a highly sensitive non-enzymatic glucose sensor

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53665-53670 ◽  
Author(s):  
Yudong Zhao ◽  
Gaochen Gu ◽  
Shengquan You ◽  
Renhua Ji ◽  
Hui Suo ◽  
...  
Keyword(s):  
Glucose Concentration ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Precipitation Method ◽  
Ni Foam ◽  
Direct Precipitation ◽  
Highly Sensitive ◽  
Direct Precipitation Method

Ni(OH)2 nanosheets on Ni foam was prepared by the direct precipitation method. This electrode shows high sensitivity with 1130 μA mM−1 cm−2 at the glucose concentration range of 2 μM to 40 μM and 1097 μA mM−1 cm−2 at the range of 0.1 mM to 2.5 mM.

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