One-Step Hydrothermal Synthesis of Carbonaceous Spheres from Glucose with an Aluminum Chloride Catalyst and Its Adsorption Characteristic for Uranium(VI)

被引:35
作者
Cai, Huaming [1 ,2 ]
Lin, Xiaoyan [1 ,2 ]
Tian, Linyuan [1 ,2 ]
Luo, Xuegang [2 ]
机构
[1] Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China
[2] Southwest Univ Sci & Technol, Engn Res Ctr Biomass Mat, Minist Educ, Mianyang 621010, Sichuan, Peoples R China
关键词
AQUEOUS-SOLUTION; CARBONIZATION; FRUCTOSE; MONOSACCHARIDES; DEHYDRATION; PERFORMANCE; WATER; DECOMPOSITION; NANOPARTICLES; SACCHARIDES;
D O I
10.1021/acs.iecr.6b02540
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Hydrothermal carbonization (HTC) of carbohydrates has been widely used for the synthesis of carbon materials. Most of the chemical transformations (e.g., fragmentation, dehydration) of carbohydrates in the HTC synthesis of carbon-rich microspheres need relatively high temperatures. However, the superficial functionalities (e.g., reactive oxygen groups) of the microspheres are susceptible to the synthesis temperature. It synthesis of HTC microspheres with highly abundant reactive oxygen groups is seldom reported at low temperatures. Herein, HTC of glucose was proposed to synthesize carbon materials using AlCl3 as the catalyst at 120-150 degrees C in this study. The chemical properties and structural characteristics of HTC microspheres were analyzed using Fourier transform infrared, X-ray photoelectron spectroscopy, solution C-13 NMR, and scanning electron microscopy. The results showed that the HTC microspheres were successfully synthesized with near single-spherical shapes and smooth surfaces and the size of the diameter in the range of 0.5-5.5 mu m. There were cross-linked furanic structure and abundant reactive oxygen groups on the surface of the HTC microspheres. 5-Hydroxymethylfural was detected by solution C-13 NMR, which played a key role in the HTC synthesis of carbon-rich microspheres. The HTC microspheres exhibit the maximum adsorption capacity of 163 mg/g for uranium(VI).
引用
收藏
页码:9648 / 9656
页数:9
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