Preparation of 4A-zeolite-based Ag nanoparticle composite catalyst and research of the catalytic properties
Preparation of 4A-zeolite-based Ag nanoparticle composite catalyst and research of the catalytic properties
复制标题
4A-沸石基纳米银复合催化剂的制备及催化性能研究
作者：
Hu Xiaosong;Bai Jie;Wang Junzhong;Li Chunping;Xu Wei
制备了4A-沸石基银纳米粒子(Ag NPs)复合催化剂并研究了其催化性能。以煤矸石为原料，采用水热法合成4A沸石。 Ag NPs 采用原位还原法制备。采用浸渍法制备了4A-沸石基Ag NP复合催化剂。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外可见光谱(UV-vis)、X射线衍射(XRD)、X射线光电子能谱(XPS)等一系列表征技术对催化剂进行了分析。表征结果表明Ag纳米颗粒均匀分布在4A沸石上。然后将该催化剂用于催化苯乙烯的环氧化。氧化剂为叔丁基过氧化氢(TBHP)，异丙醇用作溶剂。这表明了复合催化剂优异的催化性能。结果显示，苯乙烯转化率非常高（72.1%），氧化苯乙烯（SO）选择性极好（59.5%）。此外，SO和苯甲醛(BZ)的联合选择性达到93.3%。
A 4A-zeolite-based silver nanoparticle (Ag NPs) composite catalyst was prepared and its catalytic properties were studied. A hydrothermal method was used to synthesis 4A-zeolite from coal gangue raw material. Ag NPs were prepared by an in situ reduction method. The 4A-zeolite-based Ag NP composite catalyst was prepared by impregnation method. The catalyst was analyzed by a series of characterization techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible spectroscopy (UV-vis), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), etc. The characterization results indicated that the Ag NPs were uniformly distributed on the 4A-zeolite. The catalyst was then used to catalyze the epoxidation of styrene. The oxidant was tert-butyl hydroperoxide (TBHP), and isopropanol was used as the solvent. This demonstrated the excellent catalytic properties of the composite catalyst. The results showed very high conversion of styrene (72.1%) and excellent styrene oxide (SO) selectivity (59.5%). In addition, the joint selectivity of SO and benzaldehyde (BZ) reached 93.3%.
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影响因子：
3.3
作者：
Junhua Liu;F. Wang;Shan-Bin Qi;Zhenggui Gu;Gongde Wu
通讯作者：
Junhua Liu;F. Wang;Shan-Bin Qi;Zhenggui Gu;Gongde Wu
影响因子：
4.7
作者：
K. Wegner;B. Walker;S. Tsantilis;S. Pratsinis
通讯作者：
K. Wegner;B. Walker;S. Tsantilis;S. Pratsinis
影响因子：
--
作者：
M. A. D. Silva;C. Freire;B. Castro;J. Figueiredo
通讯作者：
M. A. D. Silva;C. Freire;B. Castro;J. Figueiredo
影响因子：
29.4
作者：
Younan Xia;B. Gates;Yadong Yin;Yu Lu
通讯作者：
Younan Xia;B. Gates;Yadong Yin;Yu Lu
影响因子：
15
作者：
Ling Zhou;C. Gorin;R. Madix
通讯作者：
Ling Zhou;C. Gorin;R. Madix