fulltext.study @t Gmail

One dimensional (1D) γ-alumina nanorod linked networks: Synthesis, characterization and application

Paper ID Volume ID Publish Year Pages File Format Full-Text
39783 45836 2014 10 PDF Available
Title
One dimensional (1D) γ-alumina nanorod linked networks: Synthesis, characterization and application
Abstract

•We successfully produced one dimensional (1D) alumina nanocomposites.•Nanorods induced an increase on the conduction character of alumina.•Morphological changes were correlated with structure director agents.•Alumina nanorods have been used as NiWS catalysts support with promising results.

A series of one dimensional (1D) alumina nanocomposites were prepared by a soft template sol–gel synthesis. The materials were calcined at 773 K and an extensive characterization was carried out. Several arrays and individual 1D nanorods forming a linked network were observed by HRTEM. The presence of alumina nanorods induced novel electronic properties for alumina carrier. A decrease on the band gap energy detected by DRS UV–vis, and a shift on the binding energy of Al 2p core-level was observed by XPS revealing an increase on the conduction character. This unusual behavior for alumina materials is probably related with an oxygen deficiency over the nanorod surface confirmed by TEM–EDX analysis. Also, it was possible to correlate some surface morphological changes with the average molecular weight (AMW) of the “Pluronics”. The results show that a decrease for the nanorod average length is observed with an increase on the pluronic AMW. Besides, a proportional increase for the nanorods average diameter with the pluronic AMW is also observed. These results imply that it is possible to control de morphological characteristics of the nanostructures. The formation of the nanorods linked network give a rise to materials with high specific surface area and a very narrow pore size distribution in the mesoporous range. Some materials were used as a support to prepare NiWS catalysts and were tested in the HDS of dibenzothiophene with promising results. Finally a possible mechanism for the formation of the alumina nanorods is proposed in this work.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (157 K)Download as PowerPoint slide

Keywords
1D materials; γ-Alumina; Soft-template; Nanorod; Low-sulfur diesel; HDS
First Page Preview
One dimensional (1D) γ-alumina nanorod linked networks: Synthesis, characterization and application
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 472, 22 February 2014, Pages 1–10
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us