H3PW12O40 encapsulation by nanoporous metal organic framework HKUST-1: Synthesis, characterization, activity and stability
作者:Ezzat Rafiee、Narges Nobakht
DOI:10.17344/acsi.2016.2236
日期:2016.6.15
potentiometric titration with n-butylamine and PW/HKUST-1 presented very strong acidic sites with Ei > 100 mV. This nano catalyst was successfully used for the synthesis of various β-keto enol ethers at 45 °C with 51-98% yield after 5-75 min. The catalyst was easily recycled and reused at least four times without significant loss of its activity (94% yield after forth run). The presence of the PW in PW/HKUST-1
通过将H3PW12O40(PW)封装到HKUST-1(Cu3(BTC)2,BTC = 1,3,5-苯三甲酸)中以5 Cu(NO3)2·3H2O / 2.8 BTC的摩尔组成将杂化复合材料制成通过将PW和铜盐的溶液添加到BTC和表面活性剂的混合物中来获得/0.3 PW / 0.6 CTAB。通过多种技术对催化剂进行了表征,包括粉末X射线衍射(XRD),傅立叶变换红外(FT-IR),扫描电子显微镜(SEM),能量色散X射线(EDX),激光粒度分析仪,Brunauer Emmett-柜员(BET)。催化剂的酸度通过正丁胺的电位滴定法测量,PW / HKUST-1表现出非常强的酸性位点,Ei> 100 mV。该纳米催化剂成功地用于在45°C下5-75分钟后以51-98%的产率合成各种β-酮烯醇醚。该催化剂易于回收利用,至少可重复使用四次,而不会显着降低其活性(第四次运行后收率为94%)。PW /