Synthesis of core-shell structured zeolite-A@mesoporous silica composites for butyraldehyde adsorption

Haijun Yu; Yingying Lv; Kuoyan Ma; Changguo Wang; Zhaoteng Xue; Yujuan Zhao; Yonghui Deng; Ya Dai; Dongyuan Zhao

doi:10.1016/j.jcis.2014.04.060

Synthesis of core-shell structured zeolite-A@mesoporous silica composites for butyraldehyde adsorption

J Colloid Interface Sci. 2014 Aug 15:428:251-6. doi: 10.1016/j.jcis.2014.04.060. Epub 2014 May 4.

Authors

Haijun Yu¹, Yingying Lv², Kuoyan Ma³, Changguo Wang³, Zhaoteng Xue², Yujuan Zhao², Yonghui Deng², Ya Dai⁴, Dongyuan Zhao⁵

Affiliations

¹ Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, PR China; Harmful components and tar reduction in cigarette, Sichuan Key laboratory, Chengdou 610066, PR China.
² Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, PR China.
³ Harmful components and tar reduction in cigarette, Sichuan Key laboratory, Chengdou 610066, PR China.
⁴ Harmful components and tar reduction in cigarette, Sichuan Key laboratory, Chengdou 610066, PR China. Electronic address: david0209028@126.com.
⁵ Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, PR China. Electronic address: dyzhao@fudan.edu.cn.

PMID: 24910060
DOI: 10.1016/j.jcis.2014.04.060

Abstract

A simple sol-gel process is followed to construct a thin layer of mesoporous silica shell core-shell structure on micrometer sized and nanometer sized zeolite A (micro-zeolite A@SiO2 and nano-zeolite A@SiO2 respectively). Further thickness of the silica shells has been tuned from 20 to 50 nm while the zeolite A particle size changes from nanometer to micrometer. Pores of the silica shells arranged orderly on the crystal-faces of zeolite-A cores. Typically, adsorption amount of the butyraldehyde towards these core-shell composite materials is investigated well and is verified to be almost double than that of the pristine zeolite A. Interestingly the nano-zeolite A core containing core-shell composite absorbs maximum butyraldehyde (314 mg/g) compared to the micro-zeolite A (266 mg/g), even if the mesoporous shell thickness of the nano-zeolite A@SiO2 composites is less (20 nm) than that of micro-zeolite A@SiO2 (50 nm). Both of these values are significantly larger than the pristine zeolite A (nano-zeolite A; 151 mg/g and micro-zeolite A; 146 mg/g).

Keywords: Adsorption; Butyraldehyde; Core–shell; Particle size; Zeolite.