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Updated: Jun 21, 2026

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture
Published on: September 29, 2023
Capturing 1,3-butadiene by the highly ordered Al-containing SBA-15
Ling Gao1, Fang Na Gu, Yu Zhou
1Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemistry Engineering, Nanjing University, Gu-lou, Nanjing 210093, China.
Aluminum-modified mesoporous silica SBA-15 effectively adsorbs 1,3-butadiene. One-pot synthesis yields superior adsorption compared to post-modification methods due to enhanced acidic sites.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Mesoporous silica SBA-15 is a versatile material for adsorption applications.
- 1,3-butadiene is a volatile organic compound and an environmental pollutant.
- Efficient methods for trapping 1,3-butadiene are crucial for environmental remediation.
Purpose of the Study:
- To investigate the adsorption of 1,3-butadiene using aluminum-modified SBA-15.
- To compare different alumina incorporation methods (one-pot, solid-state grinding, impregnation) for SBA-15 modification.
- To characterize the property-function relationship of the resulting composites.
Main Methods:
- Synthesis of aluminum-modified SBA-15 via one-pot, solid-state grinding, and impregnation methods.
- Characterization using X-ray diffraction (XRD), N(2) adsorption-desorption, Fourier-transform infrared spectroscopy (FTIR), and NH(3) temperature-programmed desorption (NH(3)-TPD).
- Adsorption studies using N-nitrosopyrrolidine (NPYR) as a probe molecule.
Main Results:
- Aluminum modification significantly enhanced the 1,3-butadiene adsorption capacity of SBA-15.
- The one-pot synthesized sample demonstrated higher adsorption activity than post-modified samples.
- Characterization revealed the formation of Brønsted acidic sites and preserved silanol groups in the one-pot sample, contributing to its enhanced performance.
Conclusions:
- One-pot synthesis is an effective strategy for preparing highly active aluminum-modified SBA-15 for 1,3-butadiene adsorption.
- The presence of Brønsted acidic sites and silanol groups is key to improved adsorption performance.
- N-nitrosopyrrolidine adsorption can serve as a valuable method for differentiating mesoporous silica materials with similar Al-content but different preparation methods.
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