Amine-Functionalized SBA-15 with Uniform Morphology and Well-Defined Mesostructure for Highly Sensitive Chemosensors To Detect Formaldehyde Vapor

Amine-functionalized SBA-15 with uniform morphology and well-defined mesostructure was prepared using a postgrafting route. The morphology, mesostructure, and functionality of the materials were characterized by scanning electron microscopy, transmission electron microscopy, small-angle X-ray scatte...

Full description

Saved in:
Bibliographic Details
Published inLangmuir Vol. 28; no. 20; pp. 7843 - 7850
Main Authors Zhu, Yongheng, Li, Hui, Zheng, Qi, Xu, Jiaqiang, Li, Xinxin
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 22.05.2012
Subjects
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Surface physical chemistry
Scanning electron microscopy
Vapor
Particle size
Chemoselectivity
Crystals
Desorption
Potential
Aldehyde
Nitrogen
Small angle X ray scattering
Porous material
Recovery
Formaldehyde
Mesoporosity
Infrared spectrometry
Solid state
Amine
Transmission electron microscopy
Adsorption
Response time
Morphology
Nuclear magnetic resonance
Functional group
Quartz microbalance
Online AccessGet full text

Cover

More Information
Summary:Amine-functionalized SBA-15 with uniform morphology and well-defined mesostructure was prepared using a postgrafting route. The morphology, mesostructure, and functionality of the materials were characterized by scanning electron microscopy, transmission electron microscopy, small-angle X-ray scattering, nitrogen adsorption–desorption, Fourier transform infrared spectroscopy, and solid-state nuclear magnetic resonance spectroscopy techniques. The results show that hexagonal lamelliform SBA-15 with a uniform particle size and short vertical channels plays two significant roles in uniformly dispersing amine-functionalizing groups and effectively adjusting the loadings of the functional groups within the mesopore channels. To confirm the potential application of the hybrids in gas sensors, using amine-functionalized SBA-15 as a sensing material and a quartz crystal microbalance as a transducer, a parts per billion level formaldehyde sensor with high sensitivity (response time about 11 s, recovery time about 15 s) and good chemoselectivity was achieved. This material holds great potential in the area of rapid, sensitive, and highly convenient formaldehyde detection.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0743-7463
1520-5827
DOI:10.1021/la300560j