Highly Efficient Red Cabbage Anthocyanin Inserted TiO₂ Aerogel Nanocomposites for Photocatalytic Reduction of Cr(VI) under Visible Light.

Highly Efficient Red Cabbage Anthocyanin Inserted TiO₂ Aerogel Nanocomposites for Photocatalytic Reduction of Cr(VI) under Visible Light.
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高效红甘蓝花青素插入 TiO2 气凝胶纳米复合材料用于可见光下光催化还原 Cr(VI)

DOI:
10.3390/nano8110937
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发表时间:
2018-11-14
期刊:
Nanomaterials (Basel, Switzerland)
影响因子:
--
通讯作者:
Yan Z
Yan Z
中科院分区:
其他
文献类型:
--
作者:
Yang H;Jiang L;Li Y;Li G;Yang Y;He J;Wang J;Yan Z

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与传统的光敏化方法中有机颜料往往被吸附形成鲜明对比,在这里,我们提出了一种天然植物色素插入TiO 2气凝胶纳米复合材料的研究,我们直接使用红甘蓝花青素(RCP)作为结构导向剂。结果发现,纯TiO 2气凝胶纳米复合材料没有表现出任何有意义的活性,用于光催化还原Cr(VI)。然而,在可见光照射下,RCP插入的TiO2气凝胶纳米复合材料的光催化还原活性大大提高,这是约2和12.3倍,分别高于传统的RCP和纯TiO2气凝胶纳米复合材料光敏化的TiO2气凝胶。它还表现出良好的稳定性,可以重复使用至少三次,而不会失去大量的活性。
In sharp contrast to conventional photosensitization methods in which the organic pigments were often adsorbed, herein we present a study on natural vegetable pigment inserted TiO2 aerogel nanocomposites and we directly use red cabbage anthocyanin (RCP) as a structure-directing agent. It was found that pure TiO2 aerogel nanocomposite did not exhibit any meaningful activity for photocatalytic reduction of Cr(VI). However, the photocatalytic reduction activity was greatly improved by the RCP inserted TiO2 aerogel nanocomposites under visible-light irradiation, which was approximately 2- and 12.3-fold higher than that of TiO2 aerogel conventionally photosensitized by RCP and pure TiO2 aerogel nanocomposites, respectively. It also exhibited good stability and could be reused at least three times without losing a significant amount of its activity.
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