Paper Information

Journal:   JOURNAL OF NEW MATERIALS   SUMMER 2015 , Volume 5 , Number 4 (20); Page(s) 141 To 151.
 
Paper: 

TO STUDY THE EFFECT OF MOLAR RATIO OF AL: MG ON THE STRUCTURAL PROPERTIES OF NIO/ A1203-MGO NANOCATALYSTS SYNTHESIS VIA MODIFIED SOL-GEL

 
 
Author(s):  OBEIDAVI A.*, SANJABI S.
 
* DEPARTMENT OF MATERIALS, AHVAZ BRANCH, ISLAMIC AZAD UNIVERSITY, AHVAZ, IRAN
 
Abstract: 

In this study, the NiO/Al203-MgO nanocrystalline with 20 wt% Ni were synthesized by using the modified sol-gel method. The aim of this study is in vestigation of influence molar ratio of AI: Mg on structural properties such as phases of nanocatalyst, the crystalline size and nanoparticles, the morphology, the surface area, the pore volume and pore size distribution. For this purpose, seven nanocrystals with different Al: Mg molar ratios (Al: Mg: 1: 1, 2: 1, 3: 1, 4: 1, 1 :2, 1 :3, 1 :4) were synthesized. The prepared powders were characterized by XRD, FTIR, TGA-DSC, FESEM with the energy dispersive Xvray spectroscopy (EDX), TEM and BET-BJH. The results of X-ray analysis showed that increasing the molar ratio of Al to Mg, the solid solution of MgO. NiO was replaced by NiO phase and the crystal size of NiO reduced with increasing this molar ratio. The crystalline size of NiO in the molar ratio of Al to Mg: 3: 1 was about 11 nm. But with increasing Mg to Al molar ratio from 1: 1 to 4: 1, the NiO phase wasn't observed and the crystalline size, with increasing Mg to Al molar ratio from 1: 1 to 4: 1 was increased from 6.7 to 9.8 nm. Also, with increasing molar ratio of Al to Mg 2: 1 to 3: 1, the specific surface area of nanocatalysts were reduced from 120 m2/g to 100m2/g .TEM image and the selected area diffraction pattern of nanoparticles with molar ratio of 2: 1 confirmed mesopore stfucture and nanocrystalline of catalysts synthesized.

 
Keyword(s): AL203-MGO, NI NANOCATALYST, THE MODIFIED SOL-GEL, STRUCTURAL PROPERTIES, SPECIFIC SURFACE AREA
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 40
 
Latest on Blog
Enter SID Blog