Journal ArticleDOI
Enhanced anti-interference on electrochemical detection of arsenite with nanoporous gold in mild condition
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TLDR
In this paper, a high surface area nanoporous gold (np-Au) with a three dimensional, interconnected ligaments and nanoporous structure was developed for the electrochemical detection of arsenite [As(III) in 0.1m HAc-NaAc solution (pH 5.0) without using strong acidic electrolyte.Abstract:
Determination of arsenite [As(III)] without interference in mild condition is crucial for portably assessing arsenic contamination using electrochemical method. We have developed high-surface area nanoporous gold (np-Au) with a three dimensional, interconnected ligaments and nanoporous structure for the electrochemical detection of As(III) in 0.1 M HAc-NaAc solution (pH 5.0) without using strong acidic electrolyte. Square wave anodic stripping voltammetry (SWASV) using the np-Au modified glassy carbon electrode (GCE) confirms the successful detection of As(III) with almost no interference from some commonly coexisting ions. Furthermore, the sensitivity of the np-Au modified GCE exhibited approximately 10-fold enhancement as compared to Au nanoparticles (Au NPs) modified GCE. Finally, the proposed method is successfully applicable for analysis of As(III) in real water samples with satisfactory recoveries. The np-Au modified GCE shows enhanced anti-interference and excellent sensing performance may be attribute to its special surface structure and the fast transports of analytes and electron in the interface of electrode.read more
Citations
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A mini-review: How reliable is the drop casting technique?
TL;DR: In this article, the coffee ring and its effects on the reproducibility of the drop casted surfaces are discussed, and approaches for amelioration of the coffee-ring effect by various methods are discussed.
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Electrochemical determination of arsenic in natural waters using carbon fiber ultra-microelectrodes modified with gold nanoparticles.
TL;DR: The analytical capability of the optimized method was demonstrated by determination of arsenic in certified reference materials and by comparison of results with those obtained by hydride generation atomic absorption spectrometry (HG-AAS) in the determination of the analyte in tap and well waters.
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Preparation, Modification, Characterization, and Biosensing Application of Nanoporous Gold Using Electrochemical Techniques
Jay K. Bhattarai,Dharmendra Neupane,Bishal Nepal,Vasilii Mikhaylov,Alexei V. Demchenko,Keith J. Stine +5 more
TL;DR: Different electrochemical strategies for the preparation, post-modification, and characterization of np-Au are reviewed along with the synergistic use of both electrochemistry and np- au for applications in biosensing.
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Electrochemical detection of arsenic contamination based on hybridization chain reaction and RecJf exonuclease-mediated amplification
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Electrochemical detection of chemical pollutants based on gold nanomaterials
Wei Jin,Govindhan Maduraiveeran +1 more
TL;DR: In this article, the utilization and prospects of Au nanomaterials such as Au nanoparticles, Au nanoclusters, nanoporous Au and their nanocomposites on the design of electrochemical sensors for the detection of chemical pollutants are the key focus of the present review.
References
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Journal ArticleDOI
Nanoporous Gold Catalysts for Selective Gas-Phase Oxidative Coupling of Methanol at Low Temperature
TL;DR: Nanoporous Au, prepared by the dealloying of AuAg alloys, is a new catalyst with a stable structure that is active without any support that catalyzes the selective oxidative coupling of methanol to methyl formate with selectivities above 97% and high turnover frequencies at temperatures below 80°C.
Journal ArticleDOI
Uptake Kinetics of Arsenic Species in Rice Plants
TL;DR: Competitive inhibition of uptake with phosphate showed that arsenite and arsenate were taken up by different uptake systems because arsenate uptake was strongly suppressed in the presence of phosphate, whereas arsenite transport was not affected by phosphate.
Journal ArticleDOI
Structured porous materials via colloidal crystal templating: from inorganic oxides to metals
Orlin D. Velev,Eric W. Kaler +1 more
TL;DR: The formation of nanostructured materials by using colloidal crystals as templates is a relatively new but rapidly growing area of materials science as mentioned in this paper, which holds promise for use as photonic crystals, advanced catalysts, and in a variety of other applications.
Journal ArticleDOI
Hydrogen bubble dynamic template synthesis of porous gold for nonenzymatic electrochemical detection of glucose
TL;DR: In this article, a galvanic replacement reaction between the porous Cu sacrificial templates and KAu(CN) 2 in solution was performed to remove the remaining Cu from the porous Au films.
Journal ArticleDOI
Anodic stripping voltammetry of arsenic(III) using gold nanoparticle-modified electrodes.
TL;DR: A novel method for the detection of arsenic(III) in 1 M HCl at a gold nanoparticle-modified glassy carbon electrode has been developed and a LOD of 0.0096 ppb was obtained with LSV.
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