外文翻譯--超聲波輻照法制備三維貫通多孔碳整體柱

1、中文 中文1960 1960字出處： 出處：Carbon, 2005, 43(13): 2808-2811 中文3D interconnected macroporous carbon monoliths preparedby ultrasonic irradiationNattaporn Tonanon , Adisak Siyasukh , Yunyong Wareenin ,Tawatchai Charinpanitkul , W

2、iwut Tanthapanichakoon , Hirotomo Nishihara ,Shin R. Mukai , Hajime TamonAbstract：A new method in preparation of 3D interconnected macroporous carbon monolith has been introduced. Ultrasonic irradiation(ultrasonic inten

3、sity 78 W/cm2) and low catalyst concentration (C/W = 10 mol/m3) of RF solution are used as an interesting and unique preparation method for 3D interconnected macroporous sonogel (gel irradiated by ultrasound at gelation

4、 stage) and/or3D interconnected macroporous carbon monolith without using templates. Keywords: Porous carbon; Pyrolysis; Adsorption; Scanning electron microscopy; PorosityMacroporous monolith is an interesting structure

5、that has interconnected skeletons in a single column, and this unique structure allows flow paths (throughpores)through the monolithic columns . Carbon monolith has high potential to be good candidates for applications

6、such as columns for chromatography, catalyst supports, adsorbents and porous electrodes under continuous flow conditions. Macroporous carbon monoliths are mostly prepared by using carbon precursors and macroscopic shape

7、templates . In general, macroscopic shape templates are interconnected skeleton such as silica template, zeolite, stable emulsions, polymer latex and the interstitial volume of other porous structures. Carbon precursors

8、 are polymeric materials or precursor of polymeric materials such as sucrose, some thermoplastics, phenolic resin, copolymerization of resorcinol Fe(II) complex and other thermosettings. There are some reports on macropo

9、rous carbon aerogels prepared by using metal catalyst or acid catalyst.In this work, a new method in preparation of 3D interconnected macroporous carbon monolith has been introduced. In general, ultrasonic irradiation h

10、as outstanding effects in many chemical reactions such as increasing reaction rates and yields of products, shortening reaction time, altering the reaction path and making milder reaction conditions possible. An intere

11、sting role of ultrasonic irradiation on mesoporous properties of RF carbon gel when the ratio of catalyst to water C/W or pH is high was also reported [10]. To the best of our knowledge, this study is the first to repo

12、rt on the work of ultrasonic irradiation (ultrasonic intensity 78W/cm2) together with low catalyst concentration (C/W = 10 mol/m3) of RF solution as an interestingand unique preparation method for 3D interconnected macr

13、oporous sonogel (gel irradiated by ultrasound at gelation stage) and/or carbon monoliths without using templates.Macroporous sonogel monolith, precursors for macroporous carbon monolith, were prepared from resorcinol fo

14、rmaldehyde (RF) solutions which were composed of resorcinol (C6H4(OH)2) (R), formaldehyde (HCHO) (F), sodium carbonate (Na2CO3) monolith) and 5 (RF sonogel monolith) m2/g. Vmic and Vmes of RF gel are 0.02 and 0.32 cm3/g

15、 respectively. For RF sonogel monolith, Vmic and Vmes cannot be detected.After pyrolysis of RF sonogel monolith, no change in macroporous structure and very low shrinkage are observed.After pyrolysis SBET and Vmic of so

16、nogel increases from 5 to 366 m2/g and N/D to 0.11 cm3/g respectively (Vmes cannot be detected). It can be seen from SEM micrograph in Fig. 2 together with porous properties that RF carbon monolith can keep 3D interconn

17、ected macroporous structures. The macropore size distributions of carbon monolith are narrow, the average macropore size around 1–3 lm as shown in Fig. 3. In this work, new synthesis method for 3D interconnected macropo

18、rous sonogel and/or carbon monolith is proposed with some advantages to other methods such as shorter gelation time of polymer monolith, small shrinkage percentage, no template preparation and template removal.In additio

19、n to this preliminary work, the effect of R/C on the structure of 3D interconnected macroporous carbon monolith (microwave drying at 200 W after solventexchange with t-butanol) has been investigated. In Figs. 4 and 5,