Abstract

In this study, we report a controlled one-pot green synthesis of multiwalled carbon nanotubes (MWCNTs) via pyrolysis of sustainable agriculture waste (chickpea peel) at 400 °C in aqueous medium. These MWCNTs demonstrated 7.0 nm diameter, 0.28 nm graphitic spacing with carbonyl, hydroxyl, and carboxylic acid functionality. The D band (presence of sp³ defects) and G band (E_2g mode of graphite) at 1350 cm⁻¹ and 1580 cm⁻¹ originated in Raman spectrum, respectively. The prepared MWCNTs showed blue fluorescence with 10% fluorescence quantum yield in aqueous medium. The MWCNTs showed triple exponential decay characteristics with an average fluorescence lifetime of 4.7 ns. The synthesized MWCNTs revealed a consistent fluorescence in the cytoplasm of 22RV1 human prostate carcinoma cell line without exerting any sign of cytotoxicity. The MWCNTs also exhibited remarkable cytocompatibility in human immortalized prostate epithelial RWPE1 cells.

Graphic abstract

中文翻译：

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鹰嘴豆果皮废料作为可持续的前体，用于生物成像应用中的荧光碳纳米管合成

摘要

在这项研究中，我们报告了通过在水介质中于400°C下热解可持续农业废料（鹰嘴豆皮）可控的一锅法绿色合成多壁碳纳米管（MWCNT）。这些MWCNT的直径为7.0 nm，石墨间距为0.28 nm，具有羰基，羟基和羧酸官能团。在1350 cm ^-1和1580 cm ^-1处的D带（存在sp ³缺陷）和G带（石墨的E _2g模）分别起源于拉曼光谱。制备的MWCNT在水性介质中显示蓝色荧光，荧光量子产率为10％。MWCNT显示出三倍指数衰减特性，平均荧光寿命为4.7 ns。合成的MWCNT在22RV1人前列腺癌细胞系的细胞质中显示出一致的荧光，而没有任何细胞毒性的迹象。MWCNTs在人类永生化前列腺上皮RWPE1细胞中也表现出显着的细胞相容性。

图形摘要