介孔二氧化硅纳米粒子(MSNs)的绿色合成及其在三氯生降解中的应用

Q1 Environmental Science
E Babu Vamsi, C.P. Devatha
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引用次数: 0

摘要

三氯生(TCS)在全球的广泛使用对人类福祉和生态系统都构成了巨大威胁。因此,有必要开发生态友好型吸附技术来解决废水中的三氯生污染问题。本研究旨在开发新型生态友好型合成方法,通过改变表面活性剂与二氧化硅的比例,利用茜草(SJ)叶提取物生产小尺寸的介孔二氧化硅纳米颗粒(MSN)。在不使用化学稳定剂或酒精稀释剂的情况下,探索了不同的比例,如 1:50、1:100 和 1:200(1 毫升正硅酸四乙酯(TEOS)相当于以毫克计的十六烷基三甲基溴化铵(CTAB))。合成的材料被命名为 MSN1、MSN2 和 MSN3。使用场发射扫描电子显微镜(FE-SEM)进行的表征研究表明,MSN3 的尺寸最小,为 30 ± 5 纳米。利用 X 射线衍射(XRD)、能量色散 X 射线光谱(EDS)、Zeta 电位(ZP)、Brunauer-Emmett-Teller(BET)、热重分析(TGA)和傅立叶变换红外光谱(FT-IR)分析了材料的物理、化学和形态特性。值得注意的是,所开发的纳米材料表现出显著的稳定性,其 ZP 值为 -33.1 mV,表面积达到 545 m2/g。生物吸附剂的傅立叶变换红外光谱峰值分别为 460、800 和 975 1/cm。这证实了(Si-O-Si)键的存在。X 射线衍射结果表明,该生物吸附剂具有无定形二氧化硅的性质,不含任何杂质。氮气吸附-解吸研究得出的孔半径为 16.8 Å,孔体积为 0.890 cc/g,这表明它具有作为吸附剂的潜力和材料功能化的实用性。所开发的生物吸附剂在去除合成废水中的三氯生方面具有更强的吸附性能,在吸附剂用量为 0.5 克/升时,去除率为 76%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Green synthesis of mesoporous silica nanoparticles (MSNs) and its application on degradation of triclosan

The widespread use of triclosan (TCS) across the globe poses a substantial threat to both human well-being and the ecosystem. This necessitates the development of eco-friendly adsorption techniques to address triclosan contamination in wastewater. This research aims to develop novel eco-friendly synthesis method using Syzygium jambos (SJ) leaf extract to produce small-sized Mesoporous Silica Nanoparticles (MSNs) by varying surfactant to silica ratio. Different ratios such as 1:50, 1:100, and 1:200 (1 mL of tetraethyl orthosilicate (TEOS) is equivalent to cetyltrimethylammonium bromide (CTAB) in mg) were explored without chemical stabilising agents or alcohol diluents. The synthesized materials were named as MSN1, MSN2, and MSN3. Characterisation studies using Field emission scanning electron microscopy (FE-SEM) showed that MSN3 exhibited smallest size of 30 ± 5nm. The physical, chemical and morphological properties were analysed for the materials using X-Ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), Zeta potential (ZP), Brunauer-Emmett-Teller (BET), Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR). Notably, the developed nanomaterial demonstrated noteworthy stability with a ZP of −33.1 mV and an impressive surface area of 545 m2/g. FT-IR peaks of biosorbent were obtained at 460, 800, and 975 1/cm. This confirms the existence of (Si–O–Si) bonds. The XRD results reveals that it possess amorphous nature of silica without any impurities. N2 adsorption-desorption studies yielded a pore radius of 16.8 Å and volume of pores are 0.890 cc/g indicating its potential as an adsorbent and its utility for material functionalisation. The developed biosorbent exhibited enhanced adsorption properties for removal of triclosan from synthetic wastewater with 76 % removal at 0.5g/L dose of adsorbent.

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来源期刊
Case Studies in Chemical and Environmental Engineering
Case Studies in Chemical and Environmental Engineering Engineering-Engineering (miscellaneous)
CiteScore
9.20
自引率
0.00%
发文量
103
审稿时长
40 days
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