Development of organic-Inorganic nanostructured Environmental Photocatalysts with Tunable Molecular Selectivity.

具有可调分子选择性的有机-无机纳米结构环境光催化剂的开发。

• 批准号: 15560667
• 负责人: INUMARU Kei
• 金额: $ 2.43万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560667/
• 关键词: endocrine disrupter; molecular recognition; molecular selectivity; nanoporous; mesoporous; organo-modified; 環境浄化; ノニルフェノール; 疎水性; ナノ構造

In this study, combination between molecular selective adsorption and photocatalysis was investigated. n-Octyl-grafted TiO_2 (C8-TiO_2) was prepared as a model of a photocatalyst with high molecular adsorption selectivity, and its photocatalytic activity for the decomposition of dilute 4-nonylphenol (an endocrine disrupter, ca. 2 ppm) in water was investigated. The catalyst was highly active in the presence of concentrated phenol (1000 ppm), and the 4-nonylphenol was decomposed in 180 min, while pristine TiO_2 (P-25) under the same conditions showed much lower activity. The high C8-TiO_2 activity was ascribed to the molecular selective adsorption of the organic molecules on the alkyl-grafted hydrophobic surface. Infrared spectra showed that the grafted alkyl groups were gradually decomposed under photoirradiation. The model catalyst demonstrated that molecular selective adsorption is important for removal of low-concentration contaminants in the presence of other, more concentrated com … More pounds.n-Octyl groups were grafted onto the pore walls of TiO2-MCM-41 in which TiO2 was highly dispersed in the nanopores (8.7wt%as TiO2), and the photocatalytic properties for decomposition of dilute 4-nonylphenol polyethoxylate (NPEO) in water were investigated. The activities were evaluated on the basis of the benzene ring decomposition rates.n-Octyl-grafted TiO2-MCM-41 (C8-TiO2-MCM-41) efficiently decomposed dilute NPEO. The activity of C8-TiO2-MCM-41 per TiO2 weight was higher than that of P-25 TiO2 catalyst under the same conditions. In contrast, the activity of TiO2-MCM-41 without alkyl grafting was low. NPEO at low concentrations in solution (less than 5ppm) was preferentially adsorbed onto C8-TiO2-MCM-41, while the adsorption onto TiO2-MCM-41 under the same conditions was small. The higher activity of C8-TiO2-MCM-41 was ascribed to the highly concentrated NPEO in the hydrophobic nanospaces.Photoirradiation of C8-TiO2-MCM-41 in water for 3h decreased its carbon content by 17%, but further irradiation for 7h brought about only a further 8% decrease, demonstrating a relatively long lifetime for the alkyl groups grafted onto the C8-TiO2-MCM-41. Less

本文研究了分子选择性吸附和光催化的结合。以正辛基接枝TiO_2 （C8-TiO_2）为模型材料，制备了具有高分子吸附选择性的光催化剂，考察了其对水中内分泌干扰物4-壬基苯酚（约2 ppm）的光催化活性。该催化剂在高浓度苯酚（1000 ppm）存在下具有较高的催化活性，4-壬基苯酚在180 min内就能分解，而在相同条件下，原始TiO_2 （P-25）的催化活性要低得多。C8-TiO_2的高活性归因于有机分子在烷基接枝的疏水表面的分子选择性吸附。红外光谱显示，接枝的烷基在光能照射下逐渐分解。模型催化剂表明，分子选择性吸附对于去除低浓度污染物是重要的，存在其他更浓的污染物。将正辛基接枝到TiO2- mcm -41的孔壁上，TiO2在纳米孔中高度分散（占TiO2的8.7wt%），并研究了其在水中分解稀4-壬基酚聚氧乙酸酯（NPEO）的光催化性能。根据苯环的分解速率对活性进行了评价。正辛基接枝TiO2-MCM-41 （C8-TiO2-MCM-41）能有效分解稀NPEO。在相同条件下，C8-TiO2-MCM-41每TiO2重量的活性高于P-25 TiO2催化剂。而未接枝的TiO2-MCM-41活性较低。低浓度（小于5ppm）的NPEO优先吸附在C8-TiO2-MCM-41上，而在相同条件下，NPEO在TiO2-MCM-41上的吸附量较小。C8-TiO2-MCM-41具有较高的活性，主要归因于疏水纳米空间中高浓度的NPEO。C8-TiO2-MCM-41在水中光照射3h，碳含量下降17%，但再照射7h，碳含量仅下降8%，表明接枝到C8-TiO2-MCM-41上的烷基寿命相对较长。少

项目成果

Design of organic- inorganic cooperative functions of mesoporous materials

介孔材料有机-无机协同功能的设计

• 发表时间: 2004
• 期刊: Zeolite(Japanese) 21(4)
• 作者: T.Kai;T.Mizusako;T.T.akahashi;H Kawano;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui;犬丸 啓;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui;K.Inumaru
• 通讯作者: K.Inumaru

Molecular selective adsorption of dilute alkylphenols and alkylanilines from water by alkyl-grafted MCM-41 : Tunability of the cooperative organic-inorganic function in the nanostructure

烷基接枝MCM-41对水中稀烷基酚和烷基苯胺的分子选择性吸附：纳米结构中有机-无机协同功能的可调性

• 发表时间: 2004
• 期刊: Phys.Chem.Chem.Phys 6・12
• 作者: T.Kai;T.Mizusako;T.T.akahashi;H Kawano;Kei Inumaru
• 通讯作者: Kei Inumaru

Enhanced Photo-Catalytic Decomposition of Nonylphenol by Surface-Organografted TiO_2 : a Combination of Molecular Selective Adsorption and Photo-Catalysis.

表面有机接枝 TiO_2 增强壬基酚的光催化分解：分子选择性吸附和光催化的结合。

• 发表时间: 2004
• 期刊: Appl.Catal.B Environmental 52(4)
• 作者: T.Kai;T.Mizusako;T.T.akahashi;H Kawano;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui;犬丸 啓;Kei Inumaru;Kei Inumaru
• 通讯作者: Kei Inumaru

Molecular selective adsorption of dilute alkylphenols and alkylanilines from water by alkyl-grafted MCM-41 : Tunability of the cooperative organic-inorganic function in the nanostructure.

烷基接枝MCM-41对水中稀烷基酚和烷基苯胺的分子选择性吸附：纳米结构中有机-无机协同功能的可调性。

• 发表时间: 2004
• 期刊: Phys.Chem.Chem.Phys. 6(12)
• 作者: T.Kai;T.Mizusako;T.T.akahashi;H Kawano;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui;犬丸 啓;Kei Inumaru
• 通讯作者: Kei Inumaru

Aminopropyl-Glucose Sequentially Grafted Mesoporous Silica Nanocomposite as a Novel Boron Adsorbent.

氨丙基-葡萄糖顺序接枝介孔二氧化硅纳米复合材料作为新型硼吸附剂。

• 发表时间: 2004
• 期刊: Chem.Lett. 33(12)
• 作者: T.Kai;T.Mizusako;T.T.akahashi;H Kawano;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui;犬丸 啓;Kei Inumaru;Kei Inumaru;T.Kasahara;Masataka Yasui
• 通讯作者: Masataka Yasui