采用简单浸渍和液相还原法制备了Ag/KOH-γ-Fe2O3催化剂,并采用X射线衍射、透射电镜和X射线光电子能谱等方法对催化剂进行了表征.结果表明,在乙酸乙酯介质中,以叔丁基过氧化氢为氧化剂,该催化剂具有较高的催化苯乙烯环氧化活性,KOH的添加可大幅度提高环氧化反应活性和选择性.表征结果显示,反应前后催化剂性质没有发生明显的变化.另外,所使用的磁性载体有利于负载型银催化剂的分离和循环利用.
The supported silver catalyst Ag/KOH-γ-Fe2O3 was prepared by simple impregnation and liquid reduction and then structurally characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. The supported silver catalysts were highly efficient for the epoxidation of styrene using tert-butyl hydroperoxide as the oxidant and ethyl acetate as the reaction medium.The addition of KOH was found to increase the catalytic activity and selectivity significantly. Additionally, the magnetically recoverable γ-Fe2O3, as a support, allowed for an easy separation and recycling of the catalyst after the reaction.
参考文献
| [1] | Zhang DH;Li GD;Li JX;Chen JS .One-pot synthesis of Ag-Fe3O4 nanocomposite: a magnetically recyclable and efficient catalyst for epoxidation of styrene[J].Chemical communications,2008(29):3414-3416. |
| [2] | Tyagi B;Shaik B;Bajaj H C .[J].Catalyst Communication,2009,11:114. |
| [3] | Garade A C;Bharadwaj M;Bhagwat S V;Athawale A A Rode C V .[J].Catalyst Communication,2009,10:485. |
| [4] | Dioumaev V K;Bullock R M .[J].Nature,2003,424:530. |
| [5] | Liu J H;Wang F;Gu Z G;Xu X L .[J].Catalyst Communication,2009,10:868. |
| [6] | Chimentao RJ;Kirm I;Medina F;Rodriguez X;Cesteros Y;Salagre P;Sueiras JE;Fierro JLG .Sensitivity of styrene oxidation reaction to the catalyst structure of silver nanoparticles[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2005(3):793-800. |
| [7] | Liu J H;Wang F;Xu T;Gu Z G .[J].Catalysis Letters,2010,134:51. |
| [8] | Liu, YM;Tsunoyama, H;Akita, T;Tsukuda, T .Efficient and selective epoxidation of styrene with TBHP catalyzed by Au-25 clusters on hydroxyapatite[J].Chemical communications,2010(4):550-552. |
| [9] | Choudhary V R;Jha R;Chaudhari N K;Jana P .[J].Catalyst Communication,2007,8:1556. |
| [10] | 王广健,刘正旺,刘义武,刘广卿,徐明霞,王磊.微波水热合成Mn-Ti-Al-MCM-41分子筛及其催化双氧水环氧化苯乙烯的性能[J].催化学报,2008(11):1159-1164. |
| [11] | Jiang J;Li R;Wang H L;Zheng Y F Chen H N Ma J T .[J].Catalysis Letters,2008,120:221. |
| [12] | Chou, KS;Lee, SJ .Facile methods to synthesize nanaosized iron oxide colloidal dispersion and its characterization[J].Colloids and Surfaces. A, Physicochemical and Engineering Aspects,2009(1/3):23-28. |
| [13] | Rane K S;Verenkar V M S;Pednekar R M;Sawant P Y .[J].Journal of Materials Science:Materials in Electronics,1999,10:121. |
| [14] | Basak S;Rane K S;Biswas P .[J].Chemistry of Materials,2008,20:4906. |
| [15] | Shi F;Tse M K;Pohl M M;Radnik J Brückner A Zhang S M Beller M .[J].Journal of Molecular Catalysis A:Chemical,2008,292:28. |
| [16] | Zhang Y;Li Z;Sun W;Xia C G .[J].Catalyst Communication,2008,10:237. |
| [17] | Zhang Y;Xia C G .[J].Applied Catalysis A:General,2009,366:141. |
| [18] | Liu H Q;Liang M H;Xiao C;Zheng N Feng X H Liu Y Xie J L Wang Y .[J].Journal of Molecular Catalysis A:Chemical,2009,308:79. |
| [19] | Oliveira R L;Kiyohara P K;Rossi L M .[J].Green Chemistry,2010,12:144. |
| [20] | Qi B;Lu X H;Zhou D;Xia Q H Tang Z R Fang S Y Pang T Dong Y L .[J].Journal of Molecular Catalysis A:Chemical,2010,322:73. |
| [21] | Wilson K;Hardacre C;Lee A F;Montero J M Shellard L .[J].Green Chemistry,2008,10:654. |
| [22] | 李渊,赵新强,王延吉.KOH/4A分子筛催化剂对环氧丙烷、二氧化碳和甲醇合成碳酸二甲酯反应的催化性能[J].催化学报,2004(08):633-636. |
| [23] | Macala G S;Matson T D;Johnson C L;Lewis R S Iretskii A V Ford P C .[J].Chemistry Sustainable Chemistry,2009,2:215. |
| [24] | Calvino-Casilda V;Martin-Aranda R M;Lopez-Peinado A J;Sobczak I Ziolek M .[J].Catalysis Today,2009,142:278. |
| [25] | Sharma S K;Parikh P A;Jasra R V .[J].Journal of Molecular Catalysis A:Chemical,2010,317:27. |
| [26] | Teng X W;Black D;Watkins N J;Gao Y L Yang H .[J].Nano Letters,2003,3:261. |
| [27] | Liu X M;Li Y S .[J].Materials Science and Engineering C:Biomimetic and Supramolecular Systems,2009,29:1128. |
| [28] | Pereira C;Pereira A M;Quaresma P;Tavares P B Pereira E Araújo J P Freire C .[J].Dalton Transactions,2010,39:2842. |
| [29] | Lutzenkirchen-Hecht, D;Strehblow, HH .Anodic silver (II) oxides investigated by combined electrochemistry, ex situ XPS and in situ X-ray absorption spectroscopy[J].Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films,2009(10):820-829. |
| [30] | You, XF;Chen, F;Zhang, JL;Anpo, M .A novel deposition precipitation method for preparation of Ag-loaded titanium dioxide[J].Catalysis Letters,2005(3/4):247-250. |
| [31] | Sangpour, P;Babapour, A;Akhavan, O;Moshfegh, AZ .A comparative study of heat-treated Ag:SiO2 nanocomposites synthesized by cosputtering and sol-gel methods[J].Surface and Interface Analysis,2009(3):157-163. |
| [32] | Mackova A;Malinsky P;Bocan J;Svorcik V Pavlik J Stryhal Z Sajdl P .[J].Physical Status Solidi C,2008,5:964. |
| [33] | Zhang, DH;Li, HB;Li, GD;Chen, JS .Magnetically recyclable Ag-ferrite catalysts: general synthesis and support effects in the epoxidation of styrene[J].Dalton transactions: An international journal of inorganic chemistry,2009(47):10527-10533. |
| [34] | Schnippering M;Carrara M;Foelske A;Kotz R;Fermin DJ .Electronic properties of Ag nanoparticle arrays. A Kelvin probe and high resolution XPS study[J].Physical chemistry chemical physics: PCCP,2007(6):725-730. |
| [35] | Miyakoshi A;Ueno A;Ichikawa M .[J].Applied Catalysis A:General,2001,219:249. |
| [36] | Hope, GA;Woods, R;Buckley, AN;White, JM;McLean, J .Spectroscopic characterisation of n-octanohydroxamic acid and potassium hydrogen n-octanohydroxamate[J].Inorganica Chimica Acta,2010(5):935-943. |
| [37] | Schubert M M;Hackenberg S;Van Veen A C;Muhler M Plzak V Behm R J .[J].Journal of Catalysis,2001,197:113. |
| [38] | Liu H C;Kozlov A I;Kozlova A P;Shido T Iwasawa Y .[J].Physical Chemistry Chemical Physics,1999,1:2851. |
| [39] | Yang Y;Guan J Q;Qiu P P;Kan Q B .[J].Transactions Metal Chemistry,2010,35:263. |
| [40] | Lu X N;Yuan Y Z .[J].Applied Catalysis A:General,2009,365:180. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%