Synthesis and characterization of red emissive carbon quantum dots for MB degradation

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2024-09-24 DOI:10.1016/j.cplett.2024.141652

Shokir Khojiev , Gulmira Khojieva , Dan Chen , Jun Chen , Hemdan S.H. Mohamed , Jing Liu , Yu Li

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Abstract

In this study, red-emissive carbon quantum dots (R-CQDs) were synthesized using a simple, one-step solvothermal method with 1,3-naphthalenediol as the carbon source. The synthesized R-CQDs were thoroughly characterized in terms of morphology, crystallinity, functional groups, optical, and photocatalytic properties. The R-CQDs exhibited an average particle size of 5 nm, with functional groups aiding in their uniform dispersion in water. Raman spectra revealed the presence of both D and G bands, indicating successful construction of a sp² core and sp³ hybridized matrix. The R-CQDs showed strong absorption at 512 nm and high emission intensity at 610 nm. Additionally, the R-CQDs demonstrated exceptional photocatalytic performance, achieving 96 % methylene blue degradation in 180 min, with a calculated rate constant of 0.0167 min⁻¹. Their stability across different pH levels further underscores their potential as efficient photocatalysts in a variety of environmental applications.

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用于甲基溴降解的红色发射碳量子点的合成与表征

本研究以 1,3-萘二醇为碳源，采用简单的一步溶热法合成了红辐射碳量子点（R-CQDs）。合成的 R-CQDs 在形貌、结晶度、官能团、光学和光催化性能方面都有全面的表征。R-CQDs 的平均粒径为 5 纳米，其官能团有助于它们在水中均匀分散。拉曼光谱显示存在 D 和 G 波段，表明成功构建了 sp2 内核和 sp3 杂化基质。R-CQD 在 512 纳米波长处有很强的吸收，在 610 纳米波长处有很高的发射强度。此外，R-CQDs 还表现出卓越的光催化性能，在 180 分钟内实现了 96% 的亚甲基蓝降解，计算出的速率常数为 0.0167 min-1。它们在不同 pH 值条件下的稳定性进一步凸显了其作为高效光催化剂在各种环境应用中的潜力。

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.