2O3 三維有序大孔(3DOM)復(fù)合材料。利用掃描電子顯微鏡(SEM)、X射線衍射(XRD)和紫外－可見(jiàn)分光光度計(jì)(UV-Vis)等手段考察了樣品的表面形貌和催化特性。發(fā)現(xiàn)Au@Al2O33DOM復(fù)合材料具有優(yōu)異的催化性能。隨著孔徑增大,其催化性能表現(xiàn)出先上升后下降的變化規(guī)律,且在孔徑為1.27 μm時(shí)達(dá)到最高。結(jié)合理論分析表明,Au@Al2O33DOM 復(fù)合材料的微觀結(jié)構(gòu)變化,導(dǎo)致了其有效活性面積和孔道傳輸效率隨之改變,二者的共同作用是Au@Al2O33DOM復(fù)合材料催化性能變化規(guī)律的物理本質(zhì)。"/>

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Au@ Al2O3 3DOM復(fù)合材料的可控制備及催化性能研究
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南昌航空大學(xué) 航空制造工程學(xué)院,北京航空材料研究院,北京航空材料研究院,南昌航空大學(xué) 航空制造工程學(xué)院,南昌航空大學(xué) 航空制造工程學(xué)院

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TQ426.6

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北京航空材料研究院創(chuàng)新(No.KJSC140311)


Controllable Preparation of Au@3DOM Composite Structure and its Catalytic Performance
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School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Beijing Institute of Aeronautical Materials,Beijing Institute of Aeronautical Materials,School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University

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    摘要:

    采用膠體晶體模板方法,通過(guò)調(diào)控聚苯乙烯(PS)微球粒徑和前驅(qū)體濃度制備了孔徑由0.48 μm至1.65 μm連續(xù)可調(diào)的Au@Al2O3 三維有序大孔(3DOM)復(fù)合材料。利用掃描電子顯微鏡(SEM)、X射線衍射(XRD)和紫外－可見(jiàn)分光光度計(jì)(UV-Vis)等手段考察了樣品的表面形貌和催化特性。發(fā)現(xiàn)Au@Al2O33DOM復(fù)合材料具有優(yōu)異的催化性能。隨著孔徑增大,其催化性能表現(xiàn)出先上升后下降的變化規(guī)律,且在孔徑為1.27 μm時(shí)達(dá)到最高。結(jié)合理論分析表明,Au@Al2O33DOM 復(fù)合材料的微觀結(jié)構(gòu)變化,導(dǎo)致了其有效活性面積和孔道傳輸效率隨之改變,二者的共同作用是Au@Al2O33DOM復(fù)合材料催化性能變化規(guī)律的物理本質(zhì)。

    Abstract:

    Highly ordered Au@Al2O33DOM composites with different pore diameters, including0.48, 0.96, 1.27, 1.49 and 1.65μm, were prepared via infilling Al2O3 into the gaps of PS colloidal crystal templates with colloidal crystal template techniquce. The morphology characters and catalytic activity of Au@Al2O3 3DOM composites were characterized by SEM, XRD and UV-Vis spectrometer, respectively. It was found that Au@Al2O33DOM composites had excellent catalytic performance. As the pore diameters increased, the catalytic performance increasedSrapidly and then decreased gradually. The catalytic activity was highest, when the pore size of the composite material reached1.27 μm. The results of theoretical analysis indicated that effective active area and channel transmission efficiency varied with the change of the microstructure, and the competition between the effective active area and the channel transmission efficiency resulted in the chang of the catalytic performance.

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周學(xué)禮,祁洪飛,劉大博,李鑫,魯世強(qiáng). Au@ Al2O3 3DOM復(fù)合材料的可控制備及催化性能研究[J].稀有金屬材料與工程,2017,46(6):1709~1713.[Zhou Xueli, Qi Hongfei, Liu Dabo, Li Xin, LuShiqiang. Controllable Preparation of Au@3DOM Composite Structure and its Catalytic Performance[J]. Rare Metal Materials and Engineering,2017,46(6):1709~1713.]
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  • 收稿日期:2015-02-11
  • 最后修改日期:2015-09-06
  • 錄用日期:2015-10-13
  • 在線發(fā)布日期: 2017-11-07
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