【摘要】：本文采用接枝法,以纖蛇紋石納米管(ChNTs)為原料,3-巰基丙基三甲氧基硅烷和3-氨基丙基三甲氧基硅烷作為表面功能化試劑,制備了巰基功能化纖蛇紋石納米管(ChNTs-SH)和氨基功能化纖蛇紋石納米管(ChNTs-NH2)。通過X射線衍射(XRD)、傅立葉紅外光譜(FTIR)、光電子能譜(XPS)、掃描電子顯微鏡(SEM)、透射電子顯微鏡(TEM)及氮氣吸附-脫附等現(xiàn)代化測試手段對功能化纖蛇紋石納米管進(jìn)行表征分析,并研究其對重金屬離子的吸附性能。(1)表征分析顯示,巰基和氨基成功地負(fù)載到纖蛇紋石納米管表面。、接枝反應(yīng)沒有改變纖蛇紋石納米管的骨架結(jié)構(gòu)特征,但受表面負(fù)載功能基團(tuán)的影響,其有序度、比表面積、孔徑以及孔容都有所下降。(2)以巰基功能化纖蛇紋石納米管為吸附劑系統(tǒng)地研究對重金屬離子Pb(Ⅱ)和Cd(Ⅱ)的吸附性能。Pb(Ⅱ)和Cd(Ⅱ)在巰基功能化纖蛇紋石納米管上的吸附主要受到pH和溫度的影響,且擬二級動力學(xué)模型更適合模擬該吸附過程,Langmuir模型能較好的模擬該吸附等溫數(shù)據(jù)。巰基功能化纖蛇紋石納米管對Pb(Ⅱ)和Cd(Ⅱ)的吸附過程為自發(fā)的吸熱過程,吸附過程不僅有纖蛇紋石納米管對重金屬的吸附,還有表面巰基官能團(tuán)對重金屬的絡(luò)合。巰基功能化纖蛇紋石納米管對重金屬離子Pb(Ⅱ)、 Cd(II)和Cr(Ⅲ)具有選擇吸附性,且吸附順序為Pb(Ⅱ)Cd(Ⅱ)Cr(Ⅲ)。(3)氨基功能化纖蛇紋石納米管吸附Pb(Ⅱ)受pH和溫度的影響較大,擬二級動力學(xué)模型更適合模擬該吸附過程,Langmuir模型能較好的模擬該吸附等溫數(shù)據(jù),且吸附過程為自發(fā)的吸熱過程。吸附過程不僅有纖蛇紋石納米管對重金屬離子的吸附,還有氨基官能團(tuán)對重金屬離子的絡(luò)合。氨基功能化纖蛇紋石納米管對重金屬離子Pb(Ⅱ)、Cd(Ⅱ)和Cr(Ⅲ)具有選擇吸附性,且吸附順序為Cr(Ⅲ)
[Abstract]:In this paper, using chrysotile nanotube (ChNTs) as raw material, 3-mercapto propyltrimethoxy silane and 3-aminopropyl trimethoxy silane were used as surface functionalization reagents. Mercapto functional chrysotile nanotubes (ChNTs-SH) and amino functional chrysotile nanotubes (ChNTs-NH2) were prepared. The functional chrysotile nanotubes were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (XRD),) (FTIR), photoelectron spectroscopy (XPS),) (XPS), scanning electron microscope (SEM),) transmission electron microscope (TEM) and nitrogen adsorption-desorption. The adsorption properties of chrysotile on chrysotile nanotubes were studied. (1) characterization and analysis showed that sulfhydryl and amino groups were successfully loaded on the surface of chrysotile nanotubes, and the graft reaction did not change the skeleton structure of chrysotile nanotubes. But affected by the functional groups loaded on the surface, the order, the specific surface area, The pore size and pore volume decreased. (2) the adsorption properties of heavy metal ions Pb (鈪，

本文編號：2257833