Enhanced Catalytic Activity on Post-Synthesized Hollow Titanium Silicalite-1 with High Titanium Content on the External Surface
发布时间：2019-03-12
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- 论文类型：
- 期刊论文
- 发表时间：
- 2016-11-16
- 发表刊物：
- CHEMISTRYSELECT
- 收录刊物：
- SCIE
- 文献类型：
- J
- 卷号：
- 1
- 期号：
- 19
- 页面范围：
- 6160-6166
- ISSN号：
- 2365-6549
- 关键字：
- heterogeneous catalysis; hollow; nanoparticles; oxidation; post-synthesis; titanium silicalite-1; zeolites
- 摘要：
- A titanium silicalite-1 (TS-1) extrudate with high content of titanium on the external surface was post-synthesized by using the mixed solution of tetrapropylammonium hydroxide and the hydrolysate of tetrabutyl titanate. The influence of Ti concentration in the post-synthesis solution on the physicochemical properties and catalytic performance of TS-1 was also studied. The amorphous silica support covering on the external surface of TS-1 was crystallized, and some hollows appeared in the samples that were post-synthesized. Most titanium introduced by this method are located at the external surface of the new generated TS-1 particles. The molar ratio of Si/Ti on the external surface decreases with the increase of the Ti concentration in the post-synthesis solution. The catalytic activity for phenol hydroxylation over the TS-1 samples is enhanced after the post-synthesis due to the new generated framework Ti on the external surface, providing the reactants more easily adsorbable active centers. A proper Ti concentration (10 vol%) in the post-synthesis solution leads to the highest catalytic activity by obtaining a proper ratio of tetrahedral and octahedral Ti to anatase TiO2.
- 第一作者
- Zuo, Yi
- 合写作者
- Wang, Yanli,Guo, Xinwen,Song, Chunshan,Liu, Min,Ma, Mengtong
- 通讯作者
- Guo, XW (reprint author), Dalian Univ Technol, Sch Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China.; Song, CS (reprint author), Penn State Univ, EMS Energy Inst, PSU DUT Joint Ctr Energy Res, University Pk, PA 16802 USA.