The Influence of Heat Treatment on the Photoactivity of Amine-Modified Titanium Dioxide in the Reduction of Carbon Dioxide

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Molecules Pub Date : 2024-09-13 DOI:10.3390/molecules29184348

Iwona Pełech, Piotr Staciwa, Daniel Sibera, Konrad Sebastian Sobczuk, Wiktoria Majewska, Ewelina Kusiak-Nejman, Antoni W. Morawski, Kaiying Wang, Urszula Narkiewicz

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引用次数: 0

Abstract

Modification of titanium dioxide using ethylenediamine (EDA), diethylamine (DEA), and triethylamine (TEA) has been studied. As the reference material, titanium dioxide prepared by the sol–gel method using titanium(IV) isopropoxide as a precursor was applied. The preparation procedure involved heat treatment in the microwave reactor or in the high-temperature furnace. The obtained samples have been characterized in detail. The phase composition was determined through the X-ray diffraction method, and the average crystallite size was calculated based on it. Values for specific surface areas and the total pore volumes were calculated based on the isotherms obtained through the low-temperature nitrogen adsorption method. The bang gap energy was estimated based on Tauc’s plots. The influence of the type and content of amine, as well as heat treatment on the photocatalytic activity of modified titanium dioxide in the photocatalytic reduction of carbon dioxide, was determined and discussed. It was clear that, regardless of the amount and content of amine introduced, the higher photoactivity characterized the samples prepared in the microwave reactor. The highest amounts of hydrogen, carbon monoxide, and methane have been achieved using triethylamine-modified titanium dioxide.

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热处理对胺改性二氧化钛在还原二氧化碳过程中的光活性的影响

研究人员使用乙二胺（EDA）、二乙胺（DEA）和三乙胺（TEA）对二氧化钛进行了改性。参考材料是使用异丙醇钛（IV）作为前驱体，通过溶胶-凝胶法制备的二氧化钛。制备过程包括在微波反应器或高温炉中进行热处理。对所获得的样品进行了详细表征。通过 X 射线衍射方法确定了相组成，并据此计算了平均晶粒尺寸。根据低温氮吸附法得到的等温线计算出了比表面积和总孔隙体积的值。砰隙能是根据陶克曲线图估算的。确定并讨论了胺的类型和含量以及热处理对改性二氧化钛光催化还原二氧化碳的光催化活性的影响。很明显，无论引入的胺的数量和含量如何，在微波反应器中制备的样品都具有较高的光活性。使用三乙胺改性二氧化钛产生的氢气、一氧化碳和甲烷量最高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.