Surface area and pore size tailoring of mesoporous silica materials by different hydrothermal treatments and adsorption of heavy metal ions

NCU Institutional Repository > 工學院 > 環境工程研究所 > 期刊論文 > Item 987654321/50127

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/50127

題名:	Surface area and pore size tailoring of mesoporous silica materials by different hydrothermal treatments and adsorption of heavy metal ions
作者:	Lin,LC;Thirumavalavan,M;Wang,YT;Lee,JF
貢獻者:	環境工程研究所
關鍵詞:	MOLECULAR-SIEVES;SORPTION ISOTHERM;AQUEOUS-SOLUTION;REMOVAL;CHEMISTRY;ADSORBENT;COPPER(II);MECHANISM;CATALYSIS;NI(II)
日期:	2010
上傳時間:	2012-03-27 17:04:02 (UTC+8)
出版者:	國立中央大學
摘要:	This paper reports the synthesis, characterization and adsorption behavior of mesoporous materials obtained by hydrothermal method using nonyltrimethyl ammoniumbromide (NTMAB) template without any functionalization. The template of the as synthesized materials was removed by calcination. The effective elimination of template was confirmed by FT-IR spectra. It is observed that temperature, time, calcination, filtration and pH were the different parameters that affect the surface of the mesoporous materials. Increase in temperature, time and calcination affected significantly the distribution of pore size and surface area. Relatively high surface area (779.83 m(2)/g) and large pore size (2.28 nm) were obtained at optimum synthesis conditions. Dialysis membrane filtration was found to be successful for first time. Langmuir adsorption of metal ions, such as Pb(2+), Cu(2+) and Ni(2+) was discussed and the experimental results reveal that the adsorption is physical phenomenon and maximum adsorption was obtained in optimized experimental conditions. Under the same experimental conditions, Pb(2+) (9.85 mg/g) showed enhanced adsorption when compared to Cu(2+) (3.85 mg/g) and Ni(2+) (2.58 mg/g) due to larger ionic radius and higher electro-negativity. A comparative study of adsorption capacity of as synthesized mesoporous materials with commercially available adsorbents showed that the order of adsorption is as follows; ZC-9 > PAC > zeolite-Y > beta zeolite. Hence, herein reported mesoporous materials hold great potential to remove heavy metal ions from aqueous solutions. (C) 2010 Elsevier B.V. All rights reserved.
關聯:	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
顯示於類別:	[環境工程研究所 ] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	436	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....