Defect- and phase-engineering of Mn-mediated MoS2 nanosheets for ultrahigh electrochemical sensing of heavy metal ions: chemical interaction-driven in situ catalytic redox reactions

2018 ◽  
Vol 54 (67) ◽  
pp. 9329-9332 ◽  
Author(s):  
Wen-Yi Zhou ◽  
Shan-Shan Li ◽  
Xiang-Yu Xiao ◽  
Shi-Hua Chen ◽  
Jin-Huai Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Redox Reactions ◽  
Chemical Interaction ◽  
Electrochemical Sensing ◽  
Mos2 Nanosheets ◽  
Phase Engineering

An ultrasensitive electrochemical detection of heavy metal ions is achieved via defect- and phase-engineering of Mn-mediated MoS2 nanosheets.

scholarly journals Electrochemical Detection of Environmental Pollutants Based on Graphene Derivatives: A Review

2021 ◽  
Vol 7 ◽  
Author(s):  
Coster Kumunda ◽  
Abolanle S. Adekunle ◽  
Bhekie B. Mamba ◽  
Ntuthuko W. Hlongwa ◽  
Thabo T. I. Nkambule
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Environmental Pollutants ◽  
Electrochemical Sensing ◽  
Graphene Synthesis ◽  
Graphene Derivatives

Population-driven socioeconomic urban expansion, industrialization, and intensified modern agricultural practices are interlinked to environmental challenges culminating in compromised water quality due to pollution by toxic, persistent, and bioaccumulative heavy metal ions, pesticides, nitroaromatics, and other emerging pollutants. Considering the detrimental impact of pollutants on human health and ecosystem, their detection in different media including water is paramount. Notably, electrochemical techniques are more appealing owing to their recognized advantages. This research summarizes and evaluates the most recent advances in the electrochemical sensing of environmental pollutants such as heavy metal ions, pesticides, nitroaromatics, and other distinct emerging contaminants. Besides, the review focuses on the application of electrochemical detection of the selected pollutants through analysis of representative reports in the five years from 2016 to 2020. Therefore, the review is intended to contribute insights and guidelines to contemporary progress in specific electrochemical application practices based on graphene derivatives, toward the aforenamed pollutants. Thus, it focused on sensing methods such as cyclic voltammetry, anodic stripping voltammetry, and electrochemical impedance spectroscopy employing different sensing elements incorporating graphene. Moreover, the review also highlighted graphene synthesis pathways, sensor design strategies, and functionalization. Furthermore, the review showed that there is congruence in the literature that functionalized graphene and its derivatives remain as viable modifiers in electrochemical sensing of pollutants. Nonetheless, the study also appraised the absence of literature reports on electrochemical detection of natural organic matter substances like humic acid and fulvic acid using a graphene-based sensor. In reckoning, current challenges related to graphene synthesis and applicability, envisaged opportunities, and future perspectives are outlined.

Metal in situ surface functionalization of polymer-grafted-carbon nanotube composite membranes for fast efficient nanofiltration

2017 ◽  
Vol 5 (2) ◽  
pp. 583-592 ◽  
Author(s):  
Faizal Soyekwo ◽  
Qiugen Zhang ◽  
Runsheng Gao ◽  
Yan Qu ◽  
Ruixue Lv ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Carbon Nanotube ◽  
Metal Ions ◽  
Surface Functionalization ◽  
Heavy Metal Ions ◽  
Composite Membranes ◽  
Carbon Nanotube Composite

Metal in situ surface functionalized PEI-g-MWCNT membranes are facilely prepared for nanofiltration of heavy metal ions in solution with high fluxes.

Graphene oxide-based electrochemical sensor: a platform for ultrasensitive detection of heavy metal ions

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24653-24657 ◽  
Author(s):  
Xuezhong Gong ◽  
Yunlong Bi ◽  
Yihua Zhao ◽  
Guozhen Liu ◽  
Wey Yang Teoh
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Gold Surface ◽  
Ultrasensitive Detection ◽  
Control Electrode ◽  
Graphene Oxide Sheets

Facile functionalization of graphene oxide sheets on gold surface results in complexation-enhanced electrochemical detection of heavy metal ions, shown here for Pb2+, Cu2+ and Hg2+, with improved detection limits by two orders of magnitude relative to the control electrode.

Removal and Recovery of Heavy Metal Ions by Two-dimensional MoS2 Nanosheets: Performance and Mechanisms

2018 ◽  
Vol 52 (17) ◽  
pp. 9741-9748 ◽  
Author(s):  
Zhongying Wang ◽  
Alison Sim ◽  
Jeffrey J. Urban ◽  
Baoxia Mi
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Two Dimensional ◽  
Mos2 Nanosheets ◽  
Removal And Recovery

Self-Assembled Co3O4/GO Composites for Excellent Electrochemical Detection of Heavy-Metal Ions

2021 ◽  
Author(s):  
yachao Hao ◽  
Chong zhang ◽  
wentao wang ◽  
Jing wang ◽  
shuhang chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Self Assembled

Electrochemical detection of trace heavy metal ions using a Ln-MOF modified glass carbon electrode

2020 ◽  
Vol 281 ◽  
pp. 121032 ◽  
Author(s):  
Wei Ye ◽  
Yanping Li ◽  
Jintong Wang ◽  
Bin Li ◽  
Yuanjing Cui ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Carbon Electrode ◽  
Glass Carbon Electrode ◽  
Glass Carbon

A study of the photodeposition over Ti/TiO2 electrode for electrochemical detection of heavy metal ions

2015 ◽  
Vol 57 ◽  
pp. 18-21 ◽  
Author(s):  
Hongchao Ma ◽  
Rui An ◽  
Lulu Chen ◽  
Yinghuan Fu ◽  
Chun Ma ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Tio2 Electrode
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