Synthesis of Titania Pillared Clays in An Aqueous Solution of Organic Acid and Its Application for Functional Material

有机酸水溶液中二氧化钛柱状粘土的合成及其在功能材料中的应用

基本信息

批准号：
11555235
负责人：
KITAYAMA Yoshie
金额：
$ 6.66万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555235/
关键词：
titania pillared days soft synthesis montmorillonite saponite mica photocatalysts for partial oxidation photocatalysts for organochroline pesticide UV protector of cosmetics 化粧品紫外線遮蔽剤マイカ表面積細孔分布光触媒紫外線遮蔽剤酢酸滴下法

项目摘要

From the environmental point of view, the soft synthetic methods of TiO_2-pillared and ZrO_2-pillared clays, such as montmorillonite, saponite and mica, have been studied in a dilute aqueous solution of acetic acid, since TiO_2-pillared clays have been usually prepared in HCl solution which brings environmental hazards due to its high reactivity and stimulus. Utilizations of the synthesized TiO_2-pillared clays were investigated.(1) We found that TiO_2-pillared mica showed extremely high activity for the complete photodecomposition of organochlorine pesticides, especially for a photodecomposition of y-hexaxhrolo-cyclohexane that could not be decomposed by TiO_2 photocatalyst alone. The high activity of TiO_2-pillared mica is attributed to its affinity for y-hexaxhrolo-cyclohexane.(2) Characteristic photocatalytic properties of TiO_2-pillared clays were observed in oxidation of benzene and decomposition of carboxylic acids.In oxidation of benzene, catechol was produced predominantly by using TiO_2 alone. On the other hand, by using TiO_2-pillared mica and TiO_2-pillared saponite catalysts, maleic acid was successively produced via phenol and catechol formation. TiO_2-pillared montmorillonite showed different catalytic activity. Resosinol and phenol were predominantly produced. These results indicate that the reaction path of benzene photo-oxidation may be attributed tfc property of the clay itself pillaring with TiO_2.In photocatalytic decomposition of organic acids, dependency of molecular size of organic acid on the catalytic activity of TiO_2-pillared clays was investigated. The photocatalytic activity of TiO_2-pillared clays decreased with an increase of the molecular size of the carboxylic acid. Since the photocatalytic activity of TiO_2-pillared saponite shows the lowest activity for the decomposition of carboxylic acids, TiO_2-pillared saponite can be possible to use as an effective UV protector of cosmetics.

从环境的角度来看，Tio_2-pillared和Zro_2-pillared粘土的软合成方法，例如Montmorillonite，Saponite和Mica，在Tio_2-Pillared粘土的稀溶液中被研究，因为Tio_2-Pillared粘土通常在HCL溶液中制备了HCL溶液，从而使环境危险造成了较高的危险性，并具有较高的复杂性。研究了合成的TIO_2柱粘土的利用。（1）我们发现，Tio_2-pillared云母显示出非常高的有机氯农药的光二次成分，特别是对于Y-Hexaxhrolo-cyclohexane的光代码而言，这可能不会被Tio_2 photocatalyst分发。 TIO_2柱云母的高活性归因于其对Y-Hexaxhrolo-Cyclohexane的亲和力。（2）在苯二氧化和羧酸的氧化和羧酸的氧化中，观察到Tio_2-pillared粘土的特征光催化特性。在羧酸的氧化中。另一方面，通过使用TIO_2柱云母和TiO_2-Pillared皂一催化剂，马来酸是通过苯酚和儿茶酚形成依次生产的。 Tio_2柱状蒙脱石显示出不同的催化活性。 resosinol和苯酚主要产生。这些结果表明，碳氧化的反应路径可以归因于有机酸的光催化分解的粘土本身的TFC特性，研究了有机酸分子大小对Tio_2柱状粘土催化活性的依赖性。随着羧酸的分子大小的增加，TIO_2柱状粘土的光催化活性降低。由于TiO_2柱状皂石的光催化活性显示羧酸分解的最低活性，因此可以将TiO_2柱含氧石用作有效的化妆品紫外线保护剂。