Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing

Heavy metals including chromium, lead and mercury have huge negative impacts on human health and the environment. Chromium, lead and mercury can induce numerous organ damage such as autoimmune diseases, kidney and nervous system damage. It is thus essential to be able to detect such metal ions, incl...

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Main Author: Loh, Jun Jie
Other Authors: Chen Peng
Format: Final Year Project
Language:English
Published: 2017
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Online Access:http://hdl.handle.net/10356/72180
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-721802023-03-03T15:41:21Z Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing Loh, Jun Jie Chen Peng School of Chemical and Biomedical Engineering DRNTU::Engineering::Bioengineering Heavy metals including chromium, lead and mercury have huge negative impacts on human health and the environment. Chromium, lead and mercury can induce numerous organ damage such as autoimmune diseases, kidney and nervous system damage. It is thus essential to be able to detect such metal ions, including in the environment and water bodies. There are numerous traditional detection techniques, such as electrochemical ion selective electrodes, Auger-electron spectroscopy, polarography, atomic absorption and emission spectroscopy and inductively coupled plasma-mass spectrometry. However, these methods requires a long process period, sophisticated instruments, complex sample preparation and are bulky and costly. Graphene quantum dots are considered superior for various functionalities including fluorescent probes for sensing and bioimaging due to their excellent characteristics such as high tunable photoluminescence, molecular size, chemical inertness, good water solubility, convenient functionalization and modification, high photostability, high biocompatibility and low toxicity. This project involves designing optical sensors based on the fluorescence quenching of pyrene-GQDs and carbon black-GQDs to detect Cr3+, Pb2+ and Hg2+ to assess the GQDs selectivity as optical sensors for the detection of these metals. From the experimental results, the different functionalized GQDs can be used for detection of different targets. For example, carbon black-GQDs is optimal for fluorescence detection of Cr3+ and pyrene-GQDs is optimal for fluorescence detection of Pb2+ and Hg2+. Bachelor of Engineering (Chemical and Biomolecular Engineering) 2017-05-29T07:21:28Z 2017-05-29T07:21:28Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/72180 en Nanyang Technological University 58 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Bioengineering
spellingShingle DRNTU::Engineering::Bioengineering
Loh, Jun Jie
Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
description Heavy metals including chromium, lead and mercury have huge negative impacts on human health and the environment. Chromium, lead and mercury can induce numerous organ damage such as autoimmune diseases, kidney and nervous system damage. It is thus essential to be able to detect such metal ions, including in the environment and water bodies. There are numerous traditional detection techniques, such as electrochemical ion selective electrodes, Auger-electron spectroscopy, polarography, atomic absorption and emission spectroscopy and inductively coupled plasma-mass spectrometry. However, these methods requires a long process period, sophisticated instruments, complex sample preparation and are bulky and costly. Graphene quantum dots are considered superior for various functionalities including fluorescent probes for sensing and bioimaging due to their excellent characteristics such as high tunable photoluminescence, molecular size, chemical inertness, good water solubility, convenient functionalization and modification, high photostability, high biocompatibility and low toxicity. This project involves designing optical sensors based on the fluorescence quenching of pyrene-GQDs and carbon black-GQDs to detect Cr3+, Pb2+ and Hg2+ to assess the GQDs selectivity as optical sensors for the detection of these metals. From the experimental results, the different functionalized GQDs can be used for detection of different targets. For example, carbon black-GQDs is optimal for fluorescence detection of Cr3+ and pyrene-GQDs is optimal for fluorescence detection of Pb2+ and Hg2+.
author2 Chen Peng
author_facet Chen Peng
Loh, Jun Jie
format Final Year Project
author Loh, Jun Jie
author_sort Loh, Jun Jie
title Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
title_short Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
title_full Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
title_fullStr Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
title_full_unstemmed Multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
title_sort multiple toxic heavy metal ions detection based on graphene quantum dots optical sensing
publishDate 2017
url http://hdl.handle.net/10356/72180
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