Potassium-doped carbon nitride supported on SBA-15 for enhanced catalytic Knoevenagel condensation under mild conditions
Potassium-doped carbon nitride supported on SBA-15 for enhanced catalytic Knoevenagel condensation under mild conditions
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SBA-15 负载钾掺杂氮化碳，用于在温和条件下增强催化 Knoevenagel 缩合反应
DOI：
10.1016/j.apcata.2022.118677
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发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
Xue Bing
中科院分区：
文献类型：
--
作者：
Wu Feng;Du Juan;Liu Na;Xu Jie;Xue Bing
Knoevenagel缩合反应是制备α，β-不饱和羰基化合物的重要反应。传统的碱性催化剂在催化剂与单键产物分离方面存在缺陷。本文采用一锅煅烧法制备了以SBA-15为载体的掺钾氮化碳材料（CN/SBA 15-KCl）。N2吸附-脱附、小角XRD、TEM和SEM表征结果表明，负载氮化碳和KCl后，SBA-15的有序介孔结构得以保持，氮和钾物种分散在SBA-15表面。CN/SBA_（15）-KCl材料作为固体碱催化剂，在Knoevenagel缩合反应中表现出较高的催化活性。在50 °C的反应温度下，苯甲醛的最佳转化率为74%，反应时间为4 h，远高于其他碳氮化物基材料。钾的引入提高了CN/SBA 15的碱强度，从而提高了催化剂的活性。
Knoevenagel condensation reaction is an important reaction for the manufacture of α,β-unsaturated carbonyl compounds. Traditional base catalysts suffer from the disadvantage in catalystsingle bondproduct separation. Herein, potassium-doped carbon nitride materials supported on SBA-15 (CN/SBA15-KCl) have been prepared through a one-pot calcination method. The characterization results of N2adsorption–desorption, small-angle XRD, TEM, and SEM revealed that the ordered mesostructures of SBA-15 had been preserved after the loading of carbon nitride and KCl, and nitrogen and potassium species were dispersed on the surface of SBA-15 support. As solid bases, the CN/SBA15-KCl materials demonstrated high and steady catalytic performances in Knoevenagel condensation. Under 50 °C of reaction temperature, the optimized conversion of benzaldehyde was up to 74% at 4 h of reaction time, much higher than other carbon-nitride-based materials. The incorporation of potassium has been proved to enhance the basic strength of CN/SBA15, and therefore improved the catalytic activity.
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影响因子：
3.7
作者：
Guo, Yarong;Chen, Tianxiang;Fang, Xiaoming
通讯作者：
Fang, Xiaoming
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影响因子：
2.8
作者：
Shen, Kang;Xue, Bing;Li, Yong-Xin;Cao, Yong
通讯作者：
Cao, Yong
影响因子：
5.2
作者：
J. N. Appaturi;Thiruchelvi Pulingam;J. Rajabathar;F. Khoerunnisa;T. Ling;S. Tan;E. Ng
通讯作者：
J. N. Appaturi;Thiruchelvi Pulingam;J. Rajabathar;F. Khoerunnisa;T. Ling;S. Tan;E. Ng
影响因子：
2.7
作者：
Basso, Adriano M.;Nicola, Bruna P.;Pergher, Sibele B. C.
通讯作者：
Pergher, Sibele B. C.
微孔氮化碳作为 Knoevenagel 缩合反应的有效固体碱催化剂
DOI：
10.1016/j.molcata.2013.02.019
发表时间：
2013-06
期刊：
Journal of Molecular Catalysis A: Chemical
影响因子：
--
作者：
Xu, Jie;Shen, Kang;Xue, Bing;Li, Yong-Xin
通讯作者：
Li, Yong-Xin