Preparation of Hydroxynaphthalene-Modified TiO2 via Formation of Surface Complexes and their Applications in the Photocatalytic Reduction of Nitrobenzene under Visible-Light Irradiation
Preparation of Hydroxynaphthalene-Modified TiO2 via Formation of Surface Complexes and their Applications in the Photocatalytic Reduction of Nitrobenzene under Visible-Light Irradiation
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DOI：
10.1021/am3017762
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发表时间：
2012-12-01
影响因子：
9.5
通讯作者：
Yamashita, Hiromi
中科院分区：
文献类型：
--
作者：
Kamegawa, Takashi;Seto, Hiroki;Yamashita, Hiromi
利用羟基萘对TiO 2进行表面改性，萘的单羟基和二羟基衍生物，通过形成表面络合物。在TiO 2上的配位能力的差异被证实取决于羟基的数量和取代模式。用无色的2，3-二羟基萘（2，3-DN）修饰TiO 2表面后，观察到较强的可见光吸收。在可见光（λ> 420 nm）照射下，适量2，3-DN改性的Pt-TiO 2光催化剂具有较高的光催化性能和重复使用性，能够将硝基苯还原为对氨基苯，并具有较高的选择性。
Visible light-sensitive photocatalysts were designed by the surface modification of TiO2 using hydroxynaphthalenes, i.e., mono- and dihydroxy derivatives of naphthalene, via formation of surface complexes. The differences in the coordination ability on TiO2 were confirmed depending on the numbers and substitution patterns of hydroxy groups. The relatively intense visible light absorption was observed after modification of TiO2 surface by colorless 2,3-dihydroxynaphthalene (2,3-DN) having two neighboring hydroxy groups. Platinized TiO2 (Pt-TiO2) modified with suitable amount of 2,3-DN showed higher photocatalytic performances and good reusability in the reduction of nitrobenzene to aminobenzene with relatively high selectivity under irradiation of visible light (lambda > 420 nm).