Modified cellulose with tunable surface hydrophilicity/hydrophobicity as a novel catalyst support for selective reduction of nitrobenzene
Modified cellulose with tunable surface hydrophilicity/hydrophobicity as a novel catalyst support for selective reduction of nitrobenzene
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DOI：
10.1016/j.catcom.2020.105949
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发表时间：
2020-04-05
影响因子：
3.7
通讯作者：
Cai, Chun
中科院分区：
文献类型：
--
作者：
Li, Dan-dan;Lu, Guo-ping;Cai, Chun
通过接枝含氟基团合成了亲水性/疏水性可调的纤维素，并将其作为钯纳米粒子的载体。将所制得的催化剂用于硝基苯可控还原合成N-苯基羟胺。25ppm的Pd催化剂在室温水溶液中可以获得出人意料的高转化率和选择性。催化剂表面的精确修饰是实现这一目标转化的关键。进一步的研究表明，表面疏水性更强的改性纤维素有利于硝基苯在N-苯基羟胺上的吸附，从而阻止了苯胺的完全加氢。
Cellulose with tailorable hydrophilicity/hydrophobicity were synthesized by grafting F-containing groups and utilized as supports for palladium nanoparticles. The obtained catalysts were applied in the synthesis of N-phenyihydroxylamine from controllable reduction of nitrobenzene. Unexpectedly high conversion and selectivity could be achieved with 25 ppm Pd catalyst at room temperature in water. The precise modification of the catalyst surface is crucial to realize this targeted transformation. Further investigation indicated that modified cellulose with a more hydrophobic surface would favour the adsorption of nitrobenzene over N-phenylhydroxylamine thus prevent full hydrogenation to aniline.