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1. 中国科学院化学研究所,北京 100190
2. 中国科学院大学化学科学学院,北京 100049
Received:23 October 2019,
Revised:2019-11-07,
Online First:12 August 2020,
Published:05 January 2020
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曲云鹏, 张丙兴, 石金彪, 谭秀娘, 韩布兴, 杨冠英, 张建玲. 钛基金属-有机框架材料的改性及其催化性能研究[J]. 化工学报, 2020, 71(1): 283-289
QU Yunpeng, ZHANG Bingxing, SHI Jinbiao, TAN Xiuniang, HAN Buxing, YANG Guanying, ZHANG Jianling. Study on modification of titanium-based metal-organic framework and catalytic performance[J]. CIESC Journal, 2020, 71(1): 283-289
曲云鹏, 张丙兴, 石金彪, 谭秀娘, 韩布兴, 杨冠英, 张建玲. 钛基金属-有机框架材料的改性及其催化性能研究[J]. 化工学报, 2020, 71(1): 283-289 DOI: 10.11949/0438-1157.20191213.
QU Yunpeng, ZHANG Bingxing, SHI Jinbiao, TAN Xiuniang, HAN Buxing, YANG Guanying, ZHANG Jianling. Study on modification of titanium-based metal-organic framework and catalytic performance[J]. CIESC Journal, 2020, 71(1): 283-289 DOI: 10.11949/0438-1157.20191213.
使用双氧水在一定温度下对钛基金属-有机框架材料NH
2
-MIL-125进行改性处理,制备得到一系列材料,系统地研究了改性方法及改性条件对材料性能的影响。结果表明,经改性处理后的材料,在可见光催化苯甲醇氧化反应中的催化速率有显著提高;同时,改性过程中的双氧水用量及改性温度对材料的结构、性质和光催化性能都有十分重要的影响。当双氧水为10 ml、改性温度为50℃时,改性材料具有优异的催化活性、选择性以及良好的稳定性,其催化速率与NH
2
-MIL-125相比提高近6倍。
A series of materials were prepared by modifying titanium based metal-organic framework material NH
2
-MIL-125 with hydrogen peroxide at a certain temperature. The effects of modification methods and conditions on the properties of materials were studied systematically. However
NH
2
-MIL-125 as a photocatalyst suffers from low catalytic activity and stability
which largely restrict its practical applications. In order to improve the catalytic activity of NH
2
-MIL-125
a solvothermal route by using H
2
O
2
was used to modify
NH
2
-MIL-125. A series of materials were synthesized by treating NH
2
-MIL-125 with different volumes of H
2
O
2
at different temperatures. X-ray diffraction
scanning electron microscope
transmission electron microscope
ultraviolet-visible light absorption spectroscopy
Fourier-transform infrared spectroscopy
X-ray photoelectron spectroscopy and N
2
adsorption analysis were used to characterize the structures and properties of the obtained product. Furthermore
their photocatalytic performances for the visible-light-driven oxidation of benzyl alcohol were tested. The results show that the product modified by 10 ml H
2
O
2
at 50℃ exhibits excellent catalytic activity and selectivity. The maximum turnover frequency is nearly 6 times as high as that of NH
2
-MIL-125 at the same experimental conditions. The partial loss of organic ligands and the introduction of peroxide groups could generate more catalytic-active sites
which is responsible for the improved catalytic activity.
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