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基于颗粒的介孔二氧化硅薄膜的生长与功能化及其在催化中的应用。

Growth and Functionalization of Particle-Based Mesoporous Silica Films and Their Usage in Catalysis.

作者信息

Wu Pei-Hsuan, Mäkie Peter, Odén Magnus, Björk Emma M

机构信息

Nanostructured Materials, Department of Physics, Chemistry and Biology (IFM), Linköping University, 581 83 Linköping, Sweden.

Institute of Inorganic Chemistry II, University of Ulm, Albert-Einstein-Allee 11, 890 81 Ulm, Germany.

出版信息

Nanomaterials (Basel). 2019 Apr 6;9(4):562. doi: 10.3390/nano9040562.

DOI:10.3390/nano9040562
PMID:30959939
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6523614/
Abstract

We report the formation of mesoporous films consisting of SBA-15 particles grown directly onto substrates and their usage as catalysts in esterification of acetic acid and ethanol. The film thickness was altered between 80 nm and 750 nm by adding NH₄F to the synthesis solution. The salt also affects the formation rate of the particles, and substrates must be added during the formation of the siliceous network in the solution. Various substrate functionalizations were tested and hydrophobic substrates are required for a successful film growth. We show that large surfaces (> 75 cm²), as well as 3D substrates, can be homogenously coated. Further, the films were functionalized, either with acetic acid through co-condensation, or by coating the films with a thin carbon layer through exposure to furfuryl alcohol fumes followed by carbonization and sulfonation with H₂SO₄. The carbon-coated film was shown to be an efficient catalyst in the esterification reaction with acetic acid and ethanol. Due to the short, accessible mesopores, chemical variability, and possibility to homogenously cover large, rough surfaces. the films have a large potential for usage in various applications such as catalysis, sensing, and drug delivery.

摘要

我们报道了由直接生长在基底上的SBA - 15颗粒组成的介孔薄膜的形成及其在乙酸和乙醇酯化反应中作为催化剂的应用。通过向合成溶液中添加NH₄F,薄膜厚度在80纳米至750纳米之间变化。该盐还会影响颗粒的形成速率,并且在溶液中硅质网络形成过程中必须添加基底。测试了各种基底功能化,成功生长薄膜需要疏水基底。我们表明,大面积(> 75平方厘米)以及三维基底都可以被均匀涂覆。此外,薄膜通过共缩合用乙酸进行功能化,或者通过暴露于糠醇烟雾中,随后碳化并用H₂SO₄磺化,在薄膜上涂覆一层薄碳层。碳涂覆薄膜在乙酸和乙醇的酯化反应中被证明是一种高效催化剂。由于短的、可接近的介孔、化学可变性以及均匀覆盖大的粗糙表面的可能性,这些薄膜在催化、传感和药物递送等各种应用中具有很大的应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2bf74d7d4b23/nanomaterials-09-00562-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/c48fb8b7b7ca/nanomaterials-09-00562-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/cb8e9a4de2ff/nanomaterials-09-00562-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/935b9df537b7/nanomaterials-09-00562-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/4be232996bdb/nanomaterials-09-00562-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2aa51c3daa79/nanomaterials-09-00562-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/89469870b6c8/nanomaterials-09-00562-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/b8654abb31fd/nanomaterials-09-00562-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2d51f82b3873/nanomaterials-09-00562-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/0daef79d26d3/nanomaterials-09-00562-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2bf74d7d4b23/nanomaterials-09-00562-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/c48fb8b7b7ca/nanomaterials-09-00562-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/cb8e9a4de2ff/nanomaterials-09-00562-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/935b9df537b7/nanomaterials-09-00562-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/4be232996bdb/nanomaterials-09-00562-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2aa51c3daa79/nanomaterials-09-00562-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/89469870b6c8/nanomaterials-09-00562-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/b8654abb31fd/nanomaterials-09-00562-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2d51f82b3873/nanomaterials-09-00562-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/0daef79d26d3/nanomaterials-09-00562-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29d0/6523614/2bf74d7d4b23/nanomaterials-09-00562-g010.jpg

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