废米糠制备炭纳米颗粒及其对金属离子的光学传感性能

Peggy Zhen Zhen Ngu; Stephanie Pei Phing Chia; Jessica Fung Yee Fong; Sing Muk Ng

doi:10.1016/S1872-5805(16)60008-2

废米糠制备炭纳米颗粒及其对金属离子的光学传感性能

doi: 10.1016/S1872-5805(16)60008-2

1.
Faculty of Engineering, Computing, and Science, Swinburne University of Technology Sarawak Campus, Jalan Simpang Tiga 93350, Kuching, Sarawak, Malaysia;
2.
Swinburne Sarawak Research Centre for Sustainable Technologies, Swinburne University of Technology Sarawak Campus, Jalan Simpang Tiga 93350, Kuching, Sarawak, Malaysia

详细信息

通讯作者:
Sing Muk Ng.E-mail:smng@swinburne.edu.my

中图分类号: TQ127.1⁺1
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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-21
- 录用日期: 2016-04-21
- 修回日期: 2016-02-28
- 刊出日期: 2016-04-28

Synthesis of carbon nanoparticles from waste rice husk used for the optical sensing of metal ions

1.
Faculty of Engineering, Computing, and Science, Swinburne University of Technology Sarawak Campus, Jalan Simpang Tiga 93350, Kuching, Sarawak, Malaysia;
2.
Swinburne Sarawak Research Centre for Sustainable Technologies, Swinburne University of Technology Sarawak Campus, Jalan Simpang Tiga 93350, Kuching, Sarawak, Malaysia

摘要

摘要: 以废米糠为原料,浓硫酸为脱水剂,通过炭化法制备出炭纳米颗粒(CNPs),探讨CNPs荧光发射特征、金属离子的淬灭效应以及作为Sn(Ⅱ)离子传感材料应用。CNPs产率最佳条件为:硫酸浓度12 mol/L、加热温度120℃及恒温时间30 min。样品在水中强蓝光的最大发射波为439 nm。通过加入金属离子,使金属离子与CNPs表面间形成复合物而淬灭荧光。Sn(Ⅱ)离子对CNPs荧光具有显著的淬灭效应。Sn(Ⅱ)离子浓度对淬灭效应符合Stern-Volmer线性关系,Sn(Ⅱ)离子为6.13 mmol/L。Sn(Ⅱ)离子的检测限为18.7μmol/L。
- 炭纳米颗粒 /
- 荧光 /
- 淬灭 /
- 传感 /
- 金属离子
Abstract: This work reports on a synthesis of carbon nanoparticles(CNPs) from waste rice husk by thermally-assisted carbonization in the presence of concentrated sulfuric acid. The fluorescent emmision characteristics of the CNPs, their quenching effects by metal ions and their use as a sensing material for Sn(Ⅱ) ions were investigated. Results indicated that the yield of CNPs was optimized at a sulphuric acid concentration of 12 mol/L, heating temperature of 1200℃ and heating time of 30 min. The sample showed a strong blue luminescence in water with a maximum emission at 439 nm. The fluorescence can be quenched by adding various metal ions by the formation of complexes between the metal ions and surface of the CNPs. Sn(Ⅱ) ions had the most significant quenching effect on the fluorescence of the CNPs, which is concentration-dependent. The concentration dependent quenching was linearized with the Stern-Volmer equation, and showed a linear response up to a Sn(Ⅱ) concentration of 6.13 mmol/L. The limit of detection for Sn(Ⅱ) ions is 18.7μmol/L with good repeatability.
- Carbon nanoparticles /
- Fluorescence /
- Quenching /
- Sensing /
- Metal ions

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