Functional gold nanoparticles for sensing applications

2013 ◽  
Vol 2 (3) ◽  
pp. 269-288 ◽  
Author(s):  
Guomei Zhang
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Surface Functionalization ◽  
Heavy Metal Ions ◽  
Catalytic Properties ◽  
Smart Sensors ◽  
Sensing Applications ◽  
New Generation ◽  
Functionalized Aunps

AbstractNanoparticle-based technologies have played important roles in providing opportunities for the development of a new generation of sensing tools. Because of their unique optical, chemical, electrical, and catalytic properties, gold nanoparticles (AuNPs) have been extensively studied for biological and chemical detections as well as analytical applications. AuNP-based sensors are expected to change the foundations of sensing and detecting biomolecules and metal ions. The ease of surface functionalization of AuNPs allows chemists to create the desired functionalities for specific applications. In this review, we will discuss the use of surface-functionalized AuNPs for fabricating smart sensors that are capable of detecting heavy metal ions, glucose, and specific biomolecules such as protein and DNA.

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.

scholarly journals Eco-Friendly Sustainable Fluorescent Carbon Dots for the Adsorption of Heavy Metal Ions in Aqueous Environment

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 315 ◽  
Author(s):  
Musa Yahaya Pudza ◽  
Zurina Zainal Abidin ◽  
Suraya Abdul Rashid ◽  
Faizah Md Yasin ◽  
A. S. M. Noor ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Carbon Dots ◽  
Heavy Metal Ions ◽  
Active Sites ◽  
Adsorption Process ◽  
Coefficient Of Determination ◽  
Aqueous Environment ◽  
Order Kinetic ◽  
Sensing Applications

The materials and substances required for sustainable water treatment by adsorption technique, are still being researched widely by distinguished classes of researchers. Thus, the need to synthesize substances that can effectively clean up pollutants from the environment cannot be overemphasized. So far, materials in bulk forms that are rich in carbon, such as biochar and varieties of activated carbon have been used for various adsorptive purposes. The use of bulk materials for such purposes are not efficient due to minimal surface areas available for adsorption. This study explores the adsorption task at nano dimension using carbon dots (CDs) from tapioca. The properties of carbon structure and its influence on the adsorptive efficacy of carbon nanoparticles were investigated by energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscopy (HrTEM), and atomic force microscopy (AFM). The results implied carbon present in CDs are good adsorbents for effective adsorption of heavy metal ions (lead) with removal efficiency of 80.6% in aqueous environment. The adsorption process as explored by both Langmuir and Freundlich isotherms have proven favorability of the adsorption process. Langmuir form two and three have correlation coefficients R2 at 0.9922 and 0.9912, respectively. The Freundlich isotherm confirms CDs as having defined surface heterogeneity and the exponential distribution of active sites. The adsorption of lead unto CDs obeyed the second order kinetic model with coefficient of determination, R2 of 0.9668 and 0.9996 at an initial lead concentration of 20 mg/L and 100 mg/L, respectively. The findings validated the efficiency of CDs derived from tapioca as an excellent material for further utilization in the environmental fields of wastewater pollution detection and clean up, bio-imaging, and chemical sensing applications.

Detection of Trace Heavy Metal Ions by Anodic Stripping Voltammetry Using Gold Nanoparticles/L-Cysteine Composite

2016 ◽  
Vol 14 (9) ◽  
pp. 955-960 ◽  
Author(s):  
Khaoula Zinoubi ◽  
Yosra Braham ◽  
Houcine Barhoumi ◽  
Messaoud Benounis ◽  
Nicole Jaffrezic
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Anodic Stripping

Detection of Heavy Metal Ions Using Synthesized Amino Thiol Surfactants Assembled on Gold Nanoparticles

2014 ◽  
Vol 35 (2) ◽  
pp. 175-184 ◽  
Author(s):  
E. M. S. Azzam ◽  
A. F. M. El-Farargy ◽  
M. A. Hegazy ◽  
A. A. Abd El-Aal
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Amino Thiol

Bio-inspired surface-functionalization of graphene oxide for the adsorption of organic dyes and heavy metal ions with a superhigh capacity

2014 ◽  
Vol 2 (14) ◽  
pp. 5034-5040 ◽  
Author(s):  
Zhihui Dong ◽  
Dong Wang ◽  
Xia Liu ◽  
Xianfeng Pei ◽  
Liwei Chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Synergistic Effect ◽  
Metal Ions ◽  
Surface Area ◽  
Surface Functionalization ◽  
Heavy Metal Ions ◽  
Organic Dyes ◽  
High Surface ◽  
High Surface Area

By utilizing the synergistic effect of poly-dopamine (PD) with functional groups and graphene oxide (GO) with a high surface area, a series of sub-nano thick PD layer coated GO (PD/GO) composites were fabricated and used for effectively decontaminating wastewater.

Logical regulation of the enzyme-like activity of gold nanoparticles by using heavy metal ions

Nanoscale ◽  
2013 ◽  
Vol 5 (17) ◽  
pp. 8227 ◽  
Author(s):  
Chia-Wen Lien ◽  
Ying-Chieh Chen ◽  
Huan-Tsung Chang ◽  
Chih-Ching Huang
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Heavy Metal Ions
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