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通过水热活化钛多羟基络合物插层制备的TiO柱撑蒙脱石的光催化和吸附性能

Photocatalytic and adsorption properties of TiO-pillared montmorillonite obtained by hydrothermally activated intercalation of titanium polyhydroxo complexes.

作者信息

Butman Mikhail F, Ovchinnikov Nikolay L, Karasev Nikita S, Kochkina Nataliya E, Agafonov Alexander V, Vinogradov Alexandr V

机构信息

Ivanovo State University of Chemistry and Technology, Sheremetevsky Av. 7, Ivanovo 153000, Russian Federation.

G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Akademicheskaya St. 1, Ivanovo 153045, Russian Federation.

出版信息

Beilstein J Nanotechnol. 2018 Jan 31;9:364-378. doi: 10.3762/bjnano.9.36. eCollection 2018.

DOI:10.3762/bjnano.9.36
PMID:29515950
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5815293/
Abstract

We report on a new approach for the synthesis of TiO-pillared montmorillonite, where the pillars exhibit a high degree of crystallinity (nanocrystals) representing a mixture of anatase and rutile phases. The structures exhibit improved adsorption and photocatalytic activity as a result of hydrothermally activated intercalation of titanium polyhydroxo complexes (i.e., TiCl hydrolysis products) in a solution with a concentration close to the sol formation limit. The materials, produced at various annealing temperatures from the intercalated samples, were characterized by infrared spectroscopy, differential scanning calorimetry (DSC)/thermogravimetric analysis (TGA), X-ray diffraction, dynamic light scattering (DLS) measurements, and liquefied nitrogen adsorption/desorption. The photocatalytic activity of the TiO-pillared materials was studied using the degradation of anionic (methyl orange, MO) and cationic (rhodamine B, RhB) dyes in water under UV irradiation. The combined effect of adsorption and photocatalysis resulted in removal of 100% MO and 97.5% RhB (with an initial concentration of 40 mg/L and a photocatalyst-sorbent concentration of 1 g/L) in about 100 minutes. The produced TiO-pillared montmorillonite showed increased photocatalytic activity as compared to the commercially available photocatalyst Degussa P25.

摘要

我们报道了一种合成TiO柱撑蒙脱石的新方法，其中柱体呈现出高度结晶性（纳米晶体），代表锐钛矿相和金红石相的混合物。由于钛多羟基络合物（即TiCl水解产物）在接近溶胶形成极限浓度的溶液中进行水热活化插层，所得结构表现出改善的吸附和光催化活性。对插层样品在不同退火温度下制备的材料进行了红外光谱、差示扫描量热法（DSC）/热重分析（TGA）、X射线衍射、动态光散射（DLS）测量以及液氮吸附/脱附表征。利用紫外光照射下水中阴离子染料（甲基橙，MO）和阳离子染料（罗丹明B，RhB）的降解研究了TiO柱撑材料的光催化活性。吸附和光催化的联合作用导致在约100分钟内去除了100%的MO和97.5%的RhB（初始浓度为40 mg/L，光催化剂-吸附剂浓度为1 g/L）。与市售光催化剂德固赛P25相比，所制备的TiO柱撑蒙脱石表现出更高的光催化活性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/ed8f770e277f/Beilstein_J_Nanotechnol-09-364-g016.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/ed8f770e277f/Beilstein_J_Nanotechnol-09-364-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/ac47c13db5a9/Beilstein_J_Nanotechnol-09-364-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/ae89242f8ddd/Beilstein_J_Nanotechnol-09-364-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/098ca0fe8e10/Beilstein_J_Nanotechnol-09-364-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/f3cd992dfdd7/Beilstein_J_Nanotechnol-09-364-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/1d083390a7c9/Beilstein_J_Nanotechnol-09-364-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/476e75e77db1/Beilstein_J_Nanotechnol-09-364-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/3778306cf4c5/Beilstein_J_Nanotechnol-09-364-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a43/5815293/ed8f770e277f/Beilstein_J_Nanotechnol-09-364-g016.jpg

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