用于增强光催化活性的MFI型（ZSM-5）沸石填充的二氧化钛纳米管。

MFI-type (ZSM-5) zeolite-filled TiO2 nanotubes for enhanced photocatalytic activity.

作者信息

Paramasivam I, Avhale A, Inayat A, Bösmann A, Schmuki P, Schwieger W

机构信息

Department of Materials Science, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany.

出版信息

Nanotechnology. 2009 Jun 3;20(22):225607. doi: 10.1088/0957-4484/20/22/225607. Epub 2009 May 13.

DOI:10.1088/0957-4484/20/22/225607

PMID:19436095

Abstract

The present work demonstrates enhanced photocatalytic activity for zeolite-filled TiO2 nanotubes. ZSM-5 zeolite nanocrystals were grown on and into a TiO2 nanotubular skeleton (TiNT/ZSM-5) by multi-step hydrothermal synthesis consisting of in situ seeding and multiple in situ crystallization (MISC). The resulting zeolite nanocrystals were in the range of a few nanometers and they adhere well to the nanotubular inner walls. After crystallization, the photocatalytic activity of this zeolite-filled nanotube catalyst system was compared with neat anatase TiO2 nanotube (TiNT) and with calcined ZSM-5 powder. The results show for TiNT/ZSM-5 a highly enhanced efficiency for the decomposition of acetophenone (used as an aromatic model organic pollutant).

摘要

目前的研究表明，填充沸石的二氧化钛纳米管具有增强的光催化活性。通过由原位晶种和多次原位结晶（MISC）组成的多步水热合成法，在TiO2纳米管骨架（TiNT/ZSM-5）上并向其中生长了ZSM-5沸石纳米晶体。所得的沸石纳米晶体尺寸在几纳米范围内，并且它们很好地附着在纳米管内壁上。结晶后，将这种填充沸石的纳米管催化剂体系的光催化活性与纯锐钛矿型TiO2纳米管（TiNT）和煅烧后的ZSM-5粉末进行了比较。结果表明，TiNT/ZSM-5对苯乙酮（用作芳香族模型有机污染物）的分解效率有显著提高。