期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 134, 期 -, 页码 136-144出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2013.01.020
关键词
Selective glucose photo-oxidation; Phenol mineralization; Sonication; Ultrasound-assisted impregnation; Cr-TiO2; Solar chemicals
资金
- Marie Curie International Reintegration Grant within the 7th European Community Framework Programme
- Ministry of Science and Higher Education of Poland [473/7.PR/2012]
Novel chromium doped titania zeolite or silica supported photocatalysts were prepared via ultrasonically modified wet impregnation method. In this method, rotary evaporator was coupled with ultrasonic bath. The resulting nanomaterials were characterized by several techniques such as XRD, DR UV-vis, N-2 physisorption, XPS, ICP-MS, XRF, HRTEM-EDS and they were subsequently tested for their photocatalytic activities in liquid phase processes: selective oxidation of glucose and total mineralization of phenol. Two carboxylic acids (glucaric acid and gluconic acid) were detected as the liquid phase products in the glucose photo-oxidation and better selectivity was achieved for the photocatalyst supported on zeolite. In phenol photodegradation, although conversion rate was not meaningful (ca. 30% after 4h illumination time), negligible amounts of harmful phenol-derived compounds were detected in water compared with photodegradation using the commercial P-25 photocatalyst. This ultrasonically improved photocatalysts synthesis method was found to have a significant effect on textural properties, spherical shape, good dispersion and visible-light responsiveness of nanophotocatalysts. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据