微调光致发光和光催化：探索碳量子点的合成和纯化对 g-C3N4 的影响

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-19 DOI:10.1016/j.colsurfa.2024.135789

Nijad Ishak , Pavel Galář , Roopesh Mekkat , Mathieu Grandcolas , Miroslav Šoóš

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引用次数: 0

摘要

本研究探讨了微波合成的碳量子点（CQDs）的成分及其对氮化石墨碳（g-C3N4）半导体光催化性能的影响。利用 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、透射电子显微镜 (TEM)、热重分析 (TGA)、紫外可见光谱 (UV-vis) 和拉曼光谱对合成的 g-C3N4 和 CQDs 进行了表征。通过时间积分光致发光光谱和时间分辨光致发光光谱（TRPL）分析了 CQD 合成参数对光致发光（PL）行为的影响。通过柱层析和热处理纯化 CQD，提高了 CQDs/g-C3N4 复合材料的光催化效率，亚甲基蓝（MB）降解率高达 90%。延长 CQDs 高温分解可导致荧光团降解并形成碳核，从而提高光催化活性。细胞毒性测试证实了 CQDs 成分和复合材料的无毒性。CQDs/g-C3N4 光催化剂具有高效、低毒和耐久性的特点，在可再生能源、环境修复和可持续化学过程中具有广阔的应用前景。

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Fine-tuning photoluminescence and photocatalysis: Exploring the effects of carbon quantum dots synthesis and purification on g-C3N4

This study investigates the constituents of microwave-synthesized carbon quantum dots (CQDs) and their effects on the photocatalytic performance of graphitic carbon nitride (g-C₃N₄) semiconductors. The synthesized g-C₃N₄ and CQDs were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), thermogravimetric analysis (TGA), UV–visible (UV–vis) spectroscopy, and Raman spectroscopy. The influence of CQD synthesis parameters on photoluminescence (PL) behavior was analyzed through time-integrated photoluminescence spectroscopy and time-resolved photoluminescence spectroscopy (TRPL). CQD purification via column chromatography and heat treatment enhanced the photocatalytic efficiency of CQDs/g-C₃N₄ composites, achieving up to 90 % methylene blue (MB) degradation. Extended CQDs pyrolysis resulted in fluorophore degradation and the formation of carbogenic cores, contributing to increased photocatalytic activity. Cytotoxicity testing confirmed the nontoxic nature of CQDs components and the composite. The high efficiency, low toxicity, and durability of the CQDs/g-C₃N₄ photocatalyst present promising applications for renewable energy, environmental remediation, and sustainable chemical processes.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.