埃洛石纳米管表面结构对其吸附脱硫性能的影响

摘要

埃洛石纳米管是有广泛应用前景的新型纳米管材料，利用煅烧和酸处理等方法对埃洛石纳米管进行改性，研究改性后埃洛石纳米管表面结构对其吸附脱硫性能的影响，并利用X射线衍射（XRD）、红外光谱（FTIR）和扫描电子显微镜（SEM）等手段进行表征和分析。研究发现，埃洛石纳米管热稳定性较高，高温煅烧后仍然保持其管状结构，随着煅烧温度的增加其羟基含量减少，脱硫性能改变。酸处理在一定程度上增加了煅烧后埃洛石纳米管的羟基含量，酸处理后样品的脱硫效果随羟基含量的增加而增加。因此表明埃洛石纳米管羟基含量是影响其脱硫效果的重要因素。

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	祁晓烨
	马智
	张园园
	丁彤
	齐晓周

关键词：埃洛石纳米管；煅烧；酸处理；表面结构；吸附脱硫

Abstract：

Halloysite nanotubes are a very promising new type nanotubes material. The present study was to investigate changes in surface structure and desulfurization properties of heat-treated and acid-leached halloysite nanotubes. Halloysite nanotubes were characterized by XRD, FTIR, and SEM. The experimental results show that halloysite nanotubes have high thermal stability and the rough tubular morphology remains largely intact as long as the calcination temperature was <700 ℃. However, hydroxyl groups content of halloysite nanotubes decrease with the increase of calcination temperature. The change of hydroxyl groups content have an impact on desulfurization properties of halloysite nanotubes. Acid treatment can restore the removal hydroxyl of calcinated halloysite nanotubes in a certain degree. Desulphurization performance of the acid treated samples increase with the increase of hydroxyl content. Hydroxyl content is an important factors affecting desulfurization effect of halloysite nanotubes.

Keywords： halloysite nanotubes； calcination； acid treatment； surface structure； adsorption desulfurization

Received 2014-05-13;

Corresponding Authors: 马智, E-mail: mazhi@tju.edu.cn。 Email: mazhi@tju.edu.cn

About author: 祁晓烨(1989-),女,硕士研究生,从事脱硫方面的研究。

引用本文:

祁晓烨, 马智, 张园园, 丁彤, 齐晓周.埃洛石纳米管表面结构对其吸附脱硫性能的影响[J]. 化学工业与工程, 2016,33(5): 21-25

Qi Xiaoye, Ma Zhi, Zhang Yuanyuan, Ding Tong, Qi Xiaozhou.Effects of Surface Structure on the Adsorption Desulfurization Properties of Halloysite Nanotubes[J]. Chemcial Industry and Engineering, 2016,33(5): 21-25

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