Morphological control of anodic crystalline TiO2 nanochannel films for use in size-selective photocatalytic decomposition of organic molecules
Morphological control of anodic crystalline TiO2 nanochannel films for use in size-selective photocatalytic decomposition of organic molecules
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DOI：
10.1016/j.apsusc.2014.02.113
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发表时间：
2014-05
影响因子：
6.7
通讯作者：
E. Tsuji;Yoshiaki Taguchi;Y. Aoki;T. Hashimoto;P. Skeldon;G. Thompson;H. Habazaki
中科院分区：
文献类型：
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作者：
E. Tsuji;Yoshiaki Taguchi;Y. Aoki;T. Hashimoto;P. Skeldon;G. Thompson;H. Habazaki
我们报道了使用结晶阳极TiO 2纳米通道膜作为光催化剂的有机分子的尺寸选择性光催化分解。在433 K下，在含有不同含量K3 PO 4、K2 HPO 4和KH 2 PO 4的甘油电解液中，以20 V阳极氧化钛，制备多孔TiO 2薄膜。无论电解液的组成，所形成的TiO 2薄膜具有结晶的层状结构。电解液的碱度显着影响的TiO 2纳米通道膜的形态;更规则的纳米通道开发与电解液的碱度增加。由于在碱性电解液中形成的膜中纳米通道的直径小至约10 nm，因此厚度为5 μm的阳极TiO 2纳米通道膜在紫外光照射下对亚甲基蓝（MB）和直接红80（DR）的混合溶液具有选择性的光催化降解作用。研究了纳米通道的直径及其均匀性对有机分子尺寸选择性分解的重要性。
We report the size-selective photocatalytic decomposition of organic molecules using crystalline anodic TiO2nanochannel films as the photocatalyst. The porous TiO2films were formed by anodizing titanium at 20 V in glycerol electrolyte containing various amounts of K3PO4, K2HPO4, and KH2PO4at 433 K. Regardless of the electrolyte composition, the as-formed TiO2films had a crystalline anatase structure. The basicity of the electrolyte markedly influenced the morphology of the TiO2nanochannel films; more regular nanochannels developed with increasing basicity of the electrolyte. Because the diameter of the nanochannels in the films formed in a basic electrolyte was as small as ∼10 nm, the anodic TiO2nanochannel films with a thickness of 5 μm revealed a selective photocatalytic decomposition of methylene blue (MB) in a mixture of MB and direct red 80 (DR) kept under UV irradiation. The importance of the diameter of the nanochannels and their uniformity for size-selective decomposition of organic molecules were investigated.