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室温快速合成hkust1应用于醇选择性催化氧化
Authors
刘湘粤
庄金亮
+5 more
张宇
杜嬛
毛会玲
王晨
程琥
Publication date
1 January 2019
Publisher
Abstract
利用溶剂诱导成核法,将HKUST-1前驱液滴加入甲醇溶液,在室温条件下即可快速合成HKUST-1晶体。 X-射线衍射结果表明所合成的HKUST-1具有很高的结晶度;扫描电子显微镜显示该HKUST-1具有规则的八面体形貌,尺寸为2 ~ 3 μm; N_2吸附实验表明HKUST-1的BET比表面积高达1 100 m~2/g。利用HKUST-1含有大量的未饱和Cu~(2+),以HKUST-1和2,2,6,6-四甲基哌啶氧自由基(TEMPO)组成的催化体系,研究了HKUST-1/TEMPO对苯甲醇选择性氧化成苯甲醛的反应。催化结果表明,HKUST-1/TEMPO体系在无外加碱添加剂时,在三氟甲苯溶剂中,可将苯甲醇高效、高选择性氧化成苯甲醛。HKUST-1和TEMPO均是催化苯甲醇转化成苯甲醛的催化剂,两者缺一不可。HKUST-1催化前后结构未发生明显变化,催化剂循环利用4次后,对苯甲醇的转化率仍保持在80%以上,是优异的异相催化剂
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Last time updated on 05/12/2019