Synthesis Glycine-Modulated Metal Organic Framework Cr-PTC-Gly for Synergetic Methylene Blue Adsorption and Photodegradation under Visible Light Irradiation

Q3 Chemistry

Molekul Pub Date : 2022-11-19 DOI:10.20884/1.jm.2022.17.3.6126

A. Adawiah, Risma Nur Fitria, N. Saridewi, Farhan Maulana Azhar, Muhammad Shofyan Gunawan, Sri Komala

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引用次数: 1

Abstract

The glycine-modulated metal-organic framework (MOF) Cr-PTC-Gly was successfully synthesized for methylene blue elimination application. The Fourier Transform Infra-Red (FTIR) characterization showed the stretching vibration N-H at 2034 cm-1. The bands at 1506 and 1406 cm-1 are asymmetric and symmetric stretching vibrations (-COO) bound to Cr3+ ions and 3118 cm-1 of the hydroxyl (OH) functional group of H2O bound to the Cr3+ ion. The band gap energy of MOF Cr- PTC-Gly is 1.9 eV. The XRD analysis showed that MOF Cr-PTC-Gly has good crystallinity with a crystal size of 17.79 nm. MOF Cr-PTC-Gly with 50% glycine gave the most optimum elimination activity with an elimination capacity of 87.95 mg/gram via adsorption and photocatalytic degradation. The adsorption mechanisms were carried out via electrostatic interaction, hydrogen bonding, and π-π interaction. In contrast, photocatalytic degradation was carried out by forming free radical species with hydroxyl radicals (•OH) as a dominant species that contributed to the methylene blue degradation.

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甘氨酸调节金属有机骨架Cr-PTC-Gly的合成及其在可见光照射下对亚甲基蓝的协同吸附和光降解

成功合成了甘氨酸调制金属有机骨架（MOF）Cr-PTC-Gly，用于亚甲蓝消除应用。傅立叶变换红外光谱（FTIR）表征显示在2034cm-1处的拉伸振动N-H。1506和1406cm-1处的谱带是与Cr3+离子结合的不对称和对称拉伸振动（-COO），以及与Cr3+阳离子结合的H2O的羟基（OH）官能团的3118cm-1。MOF-Cr-PTC-Gly的带隙能量为1.9eV。XRD分析表明，MOF-Cr/PTC-Gly具有良好的结晶度，晶体尺寸为17.79nm。含有50%甘氨酸的MOF-Cr-PTC-Gly通过吸附和光催化降解产生了最佳的消除活性，消除能力为87.95mg/g。吸附机理通过静电相互作用、氢键和π-π相互作用进行。相反，光催化降解是通过形成自由基物种来进行的，其中羟基自由基（•OH）是有助于亚甲基蓝降解的主要物种。

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