Tailoring the selectivity of Ti-based photocatalysts (TiO2 and microporous ETS-10 and ETS-4) by playing with surface morphology and electronic structure
Tailoring the selectivity of Ti-based photocatalysts (TiO2 and microporous ETS-10 and ETS-4) by playing with surface morphology and electronic structure
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DOI：
10.1021/cm052841g
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发表时间：
2006-06
影响因子：
8.6
通讯作者：
Sandro Usseglio;P. Calza;A. Damin;C. Minero;S. Bordiga;C. Lamberti;E. Pelizzetti;A. Zecchina
中科院分区：
文献类型：
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作者：
Sandro Usseglio;P. Calza;A. Damin;C. Minero;S. Bordiga;C. Lamberti;E. Pelizzetti;A. Zecchina
在这项工作的第一部分，我们报告了Ets-4和Ets-10微孔钛硅酸盐的体相和表面性质的详尽表征，通过联合的氮气体积测量、扫描电子显微镜、红外光谱、拉曼光谱和UV-−-Vis技术。从文献中的X射线衍射研究中得到了表面钛醇的结构，并用分子图解方法显示了它的结构。使用过氧化氢和邻苯二酚分子的UV−Vis滴定实验，使我们能够直接测量可用钛醇(包括通道内和晶体外表面)和表面钛醇的总数。在论文的第二部分，分别考察了ETS-4和ETS-10(以及标准P25)在材料能隙上下激发下对苯酚(P)、4-氯苯酚(CP)、2，5-二氯苯酚(DCP)、2，4，5-三氯苯酚(TCP)、1，3，5-三羟基苯(THB)和2，3-二羟基萘(DHN)的光降解能力。而微孔ETS-4和ETS-10.
In the first part of this work we report an exhaustive characterization of the bulk and surface properties of ETS-4 and ETS-10 microporous titanosilicates by means of combined N2 volumetric measurements, SEM, IR, Raman, and UV−Vis techniques. The structure of the surface titanols, derived from literature XRD studies, is shown using a molecular graphic approach. UV−Vis titration experiments using H2O2, and catechol molecules, allowed us to directly measure the total number of available titanols (both in the channels and on the crystal external surface) and the surface titanols, respectively. In the second part of the paper, the ability of ETS-4 and ETS-10 (and of the standard P25) in the photodegradation of phenol (P), 4-chlorophenol (CP), 2,5-dichlorophenol (DCP), 2,4,5-trichlorophenol (TCP), 1,3,5-trihydroxybenzene (THB), and 2,3-dihydroxynaphthalene (DHN) is investigated, using both UV and visible lights, exciting above and below the materials energy gap, respectively. While microporous ETS-4 and ETS-10...