Lignosulfonate functionalized kaolin-Ag hybrid catalyst for highly effective dye decolorization

Lignosulfonate functionalized kaolin-Ag hybrid catalyst for highly effective dye decolorization
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木质素磺酸盐功能化高岭土-银杂化催化剂用于高效染料脱色

DOI:
10.1016/j.clay.2019.02.010
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发表时间:
2019-04
影响因子:
5.6
通讯作者:
Chen Guiqiu
Chen Guiqiu
中科院分区:
地球科学2区
文献类型:
--
作者:
He Kai;Yan Ming;Huang Zhenzhen;Zeng Guangming;Chen Anwei;Huang Tiantian;Peng Min;Chen Guiqiu

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本文采用简单的还原法,在不添加还原剂和稳定剂的情况下,将银纳米粒子固定在木质素磺酸盐功能化高岭土复合材料(LS-kaolin-Ag)上。采用透射电子显微镜、X射线粉末衍射、X射线光电子能谱和傅里叶变换红外光谱(FTIR)等测试手段对LS-高岭土-银复合材料的制备进行了表征。对阳离子染料罗丹明B和阴离子染料刚果的催化还原实验表明,该复合材料具有较高的催化活性。同时,该催化剂对染料脱色具有良好的重复使用性能,在连续5次反应中,染料的转化率几乎没有下降。这些结果表明LS-高岭土-银复合物作为一种高效且经济的催化剂,在各种有机染料的脱色中显示出巨大的应用潜力。
In this work, the immobilization of silver nanoparticles on lignosulfonate functionalized kaolin composite (LS-kaolin-Ag) was fabricated by a facile reduction method without additional reductant and stabilizer. Transmission electron microscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy (FTIR) were used to confirm the successful preparation of LS-kaolin-Ag composite. The catalytic reduction tests on both cationic dye rhodamine B and anionic dye Congo red indicated the high catalytic activities of this as-prepared LS-kaolin-Ag composite. Meanwhile, this catalyst showed good recyclability for dye decolorization with just a little decrease of conversion percent in five successive reactions. These results suggest that LS-kaolin-Ag composite as an efficient and cost-effective catalyst shows great application potential for the decolorization of various organic dyes.
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