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通过水溶液法自下而上合成钛磷酸盐纳米片。

Bottom-up synthesis of titanophosphate nanosheets by the aqueous solution process.

作者信息

Ban Takayuki, Asano Keito, Takai-Yamashita Chika, Ohya Yutaka

机构信息

Department of Chemistry and Biomolecular Science, Gifu University Yanagido 1-1 Gifu 501-1193 Japan

出版信息

Nanoscale Adv. 2020 Jul 7;2(8):3542-3549. doi: 10.1039/d0na00376j. eCollection 2020 Aug 11.

DOI:10.1039/d0na00376j
PMID:36134261
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9417843/
Abstract

The synthesis of titanophosphate nanosheets in aqueous sols was examined by the bottom-up process. The nanosheets were formed by mixing titanium iso-propoxide, phosphoric acid, and tetraalkylammonium hydroxide (NROH) aqueous solutions, followed by diluting with water and heating at 80 °C, forming translucent aqueous sols of titanophosphate nanosheets with the same crystal structure as layered titanium phosphate TiO(HPO)·2HO. Whether the nanosheets were crystallized depended on the reactions during the mixing of reagents before the water dilution. By controlling the acid-base reactions between the Ti species, phosphoric acid, and the hydroxides of bulky cations in the aqueous sols, the one-pot process yielded highly water-dispersible, flake-like titanophosphate nanosheets. Under some synthetic conditions, nanosheets formed even in weakly basic aqueous sols. These nanosheets can be coated on a substrate with low alkali-resistance, or used for the removal of metal ions from neutral aqueous solutions.

摘要

通过自下而上的方法研究了水溶胶中钛磷酸盐纳米片的合成。通过混合异丙醇钛、磷酸和四烷基氢氧化铵（NROH）水溶液形成纳米片，然后用水稀释并在80°C下加热，形成具有与层状磷酸钛TiO(HPO)·2HO相同晶体结构的钛磷酸盐纳米片半透明水溶胶。纳米片是否结晶取决于水稀释前试剂混合过程中的反应。通过控制水溶胶中Ti物种、磷酸和大体积阳离子的氢氧化物之间的酸碱反应，一锅法制备出了高度水分散性的片状钛磷酸盐纳米片。在某些合成条件下，即使在弱碱性水溶胶中也能形成纳米片。这些纳米片可以涂覆在耐碱性低的基材上，或用于从中性水溶液中去除金属离子。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/a3372dd5d19e/d0na00376j-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/85ee42eaf849/d0na00376j-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/cb2a0facd5a3/d0na00376j-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/2f6fa656f42d/d0na00376j-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/ad6725dbfba6/d0na00376j-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/43db44d4611a/d0na00376j-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/f79b03a98c8a/d0na00376j-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/c7bd60ab2d5a/d0na00376j-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/87205e7d502f/d0na00376j-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/a3372dd5d19e/d0na00376j-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/85ee42eaf849/d0na00376j-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/cb2a0facd5a3/d0na00376j-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/2f6fa656f42d/d0na00376j-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/ad6725dbfba6/d0na00376j-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/43db44d4611a/d0na00376j-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/f79b03a98c8a/d0na00376j-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/c7bd60ab2d5a/d0na00376j-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/87205e7d502f/d0na00376j-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4a36/9417843/a3372dd5d19e/d0na00376j-f9.jpg

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