scholarly journals Novel construction of carbon nanofiber/CuCrO2 composite for selective determination of 4-nitrophenol in environmental samples and for supercapacitor application

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15856-15870
Author(s):  
Subramanian Sakthinathan ◽  
Ramachandran Rajakumaran ◽  
Arjunan Karthi Keyan ◽  
Chung-Lun Yu ◽  
Chia-Fang Wu ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Carbon Nanofiber ◽  
Hydrothermal Process ◽  
Chromium Dioxide ◽  
Selective Detection ◽  
Supercapacitor Application ◽  
Selective Determination ◽  
Supercapacitor Applications ◽  
Simple Hydrothermal Process

A simple hydrothermal process has been used to prepare a carbon nanofiber/copper chromium dioxide (CNF/CuCrO2) composite for the selective detection of 4-nitrophenol (4-NP) and supercapacitor applications.

scholarly journals Multi-residue analytical methods for the determination of pesticides and PPCPs in water by LC-MS/MS: a review

2012 ◽  
Vol 10 (3) ◽  
pp. 876-899 ◽  
Author(s):  
Ednei Primel ◽  
Sergiane Caldas ◽  
Ana Escarrone
Keyword(s):  
Mass Spectrometry ◽  
Analytical Methods ◽  
Environmental Samples ◽  
World Wide ◽  
Matrix Effects ◽  
Tandem Mass ◽  
Selective Determination ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

AbstractResidues of pesticides, pharmaceutical and personal care products (PPCPs) are contaminants of world-wide concern. Consequently, there is a growing need to develop reliable analytical methods, which enable rapid, sensitive and selective determination of these pollutants in environmental samples, at trace levels. In this paper, a review of the liquid chromatography-tandem mass spectrometry (LC-MS/MS) based methods for the determination of pesticides and PPCPs in the environment is presented. Advanced aspects of current LC-MS/MS methodology, including sample preparation and matrix effects, are discussed.

Synthesis of fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity and selective determination of Hg2+

2018 ◽  
Vol 6 (48) ◽  
pp. 8214-8220 ◽  
Author(s):  
Quan Li ◽  
Kaite Peng ◽  
Yanzhen Lu ◽  
Aoxin Li ◽  
Fenfang Che ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Silicon Nanoparticles ◽  
Selective Detection ◽  
Label Free ◽  
Selective Determination ◽  
Highly Sensitive

Label-free fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity for highly sensitive and selective detection of Hg2+ were synthesized.

Silica cross-linked nanoparticles encapsulating a phenothiazine-derived Schiff base for selective detection of Fe(iii) in aqueous media

2014 ◽  
Vol 2 (37) ◽  
pp. 6306-6312 ◽  
Author(s):  
Fangyuan Gai ◽  
Xiang Li ◽  
Tianlei Zhou ◽  
Xiaogang Zhao ◽  
Dongdong Lu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescence Quenching ◽  
Aqueous Media ◽  
Selective Detection ◽  
Selective Determination ◽  
Design And Synthesis ◽  
Micellar Nanoparticles

This work demonstrates the design and synthesis of an ET-based fluorescence quenching chemosensor using silica cross-linked micellar nanoparticles as scaffolds to encapsulate EDDP for highly selective determination of Fe3+ in aqueous media.

Selective Determination of Pentafluorobenzyl Ester Derivatives of Carboxylic Acids by GC Using Microwave Plasma and Mass Selective Detection

1991 ◽  
Vol 45 (10) ◽  
pp. 1617-1620 ◽  
Author(s):  
Jeffrey H. Brill ◽  
Bikshandarkoil A. Narayanan ◽  
John P. McCormick
Keyword(s):  
Carboxylic Acids ◽  
Microwave Plasma ◽  
Selective Detection ◽  
Capillary Gc ◽  
Selective Determination ◽  
Fragmentation Behavior ◽  
Microwave Induced Plasma ◽  
Characteristic Fragmentation ◽  
Derivatives Of

A highly selective, sensitive method for determination of carboxylic acids in water has been developed that is based on fluorine-selective gas chromatography (GC) detection of pentafluorobenzyl ester derivatives. The atmospheric-pressure helium microwave-induced plasma detector is well suited for fluorine-specific detection of these derivatives, which were well resolved by capillary GC and displayed a characteristic fragmentation behavior when examined by GC-mass selective detection. For demonstration purposes, a number of carboxylic acids, ranging from C1 to C20, were examined and found to be derivatized with yields greater than 90%, and a sample of creek water was examined for its carboxylic acid content.

Synthesis of photoluminescent carbon dots for the detection of cobalt ions

RSC Advances ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 2285-2291 ◽  
Author(s):  
Chi-Lin Li ◽  
Chih-Ching Huang ◽  
Arun Prakash Periasamy ◽  
Prathik Roy ◽  
Wei-Cheng Wu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Hydrothermal Process ◽  
Selective Detection ◽  
Photoluminescence Quenching ◽  
Cobalt Ions ◽  
Induced Aggregation ◽  
Simple Hydrothermal Process

Photoluminescent carbon dots (C-dots) were prepared from l-cysteine through a simple hydrothermal process and used for selective detection of cobalt ions (Co2+), based on analyte induced aggregation and photoluminescence quenching of C-dots.

A Novel Fluorescent Nanoswitch Based on Carbon Dots for Sensitive Detection of Hg2+ and I−

NANO ◽  
2017 ◽  
Vol 12 (02) ◽  
pp. 1750024 ◽  
Author(s):  
Xiqing Liu ◽  
Xiao Wei ◽  
Yeqing Xu ◽  
Hongji Li ◽  
Kai Lu ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Fluorescence Intensity ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Hydrothermal Process ◽  
Fluorescence Emission ◽  
Selective Determination ◽  
Fluorescence Switching ◽  
Interfering Ions

In this paper, a novel fluorescent nanoswitch based on carbon dots (CDs) was developed for the sensitive and selective determination of Hg[Formula: see text] and I[Formula: see text]. The CDs were obtained by simple hydrothermal process and had a strong fluorescence emission at 440[Formula: see text]nm. The fluorescence of the CDs can be selectively quenched by Hg[Formula: see text] ion, and then the I[Formula: see text] was added into the system, which can interact with Hg[Formula: see text] and recover fluorescence of the CDs. Under optimal conditions, the quenching fluorescence intensity on addition of Hg[Formula: see text] has obtained a satisfactory linear relationship covering the linear range of 0–50[Formula: see text][Formula: see text]M with the linear relationship ([Formula: see text]), and the limit of detection is 0.047[Formula: see text][Formula: see text]M. The additions of I[Formula: see text] could lead to the fluorescence intensity of the solution of CDs and Hg[Formula: see text] (50[Formula: see text][Formula: see text]M) recover rapidly, which is linearly related ([Formula: see text]) to the concentration of I[Formula: see text] in the range from 0 to 70[Formula: see text][Formula: see text]M, the detection limit for I[Formula: see text] was calculated to be 0.084[Formula: see text][Formula: see text]M. Moreover, the developed method to detect Hg[Formula: see text] and I[Formula: see text] was evaluated in real examples, and the fluorescence switching can sensitively and selectively detect Hg[Formula: see text] and I[Formula: see text] over some potentially interfering ions, the recoveries were up to 97.8–107.0% and 96.7–106.6%, respectively.

Sensitive and selective determination of peptides, PG and PGP, using a novel fluorogenic reagent 4-chlorobenzene-1,2-diol

2015 ◽  
Vol 69 (4) ◽  
Author(s):  
Hasina Yasmin ◽  
Mohammed Shafikur Rahman ◽  
Takayuki Shibata ◽  
Tsutomu Kabashima ◽  
Masaaki Kai
Keyword(s):  
Reaction Time ◽  
Linear Relationship ◽  
Fluorescence Intensity ◽  
Sodium Periodate ◽  
Selective Detection ◽  
Fluorometric Method ◽  
Reaction Conditions ◽  
Fluorescent Signal ◽  
Selective Determination

AbstractA novel fluorometric method was developed for the sensitive and selective detection of Pro-Gly (PG) and Pro-Gly-Pro (PGP) using 4-chlorobenzene-1,2-diol (4-CBD) as a fluorogenic reagent. The reaction was performed at 37°C for 30 min in the presence of a borate buffer (pH 7.0) and sodium periodate. The resulting fluorescence intensity was measured using a spectrofluorometer with excitation and emission wavelengths of 450 nm and 535 nm. To obtain a stable fluorescent signal and maximise its intensity, different reaction conditions such as the concentrations of the reagents, the reaction time, and the pH were optimised. Under the optimised conditions, a linear relationship was obtained between fluorescence intensity and peptide concentrations from 1.0-40.0 μmol L

scholarly journals The Production of Carbon Nanofiber on Rubber Fruit Shell-Derived Activated Carbon by Chemical Activation and Hydrothermal Process with Low Temperature

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2038
Author(s):  
Suhdi Suhdi ◽  
Sheng-Chang Wang
Keyword(s):  
Low Temperature ◽  
Carbon Nanofibers ◽  
Carbon Nanofiber ◽  
Chemical Activation ◽  
Hydrothermal Process ◽  
High Thermal Stability ◽  
Source Material ◽  
Tem Analysis ◽  
Hydrothermal Processes ◽  
Simple Hydrothermal Process

Recently, the conversion of biomass into carbon nanofibers has been extensively studied. In this study, carbon nanofibers (CNFs) were prepared from rubber fruit shell (RFS) by chemical activation with H3PO4, followed by a simple hydrothermal process at low temperature and without a vacuum and gas catalyst. XRD and Raman studies show that the structure formed is an amorphous graphite formation. From the thermal analysis, it is shown that CNFs have a high thermal stability. Furthermore, an SEM/TEM analysis showed that CNFs’ morphology varied in size and thickness. The obtained results reveal that by converting RFS into an amorphous carbon through chemical activation and hydrothermal processes, RFS is considered a potential biomass source material to produce carbon nanofibers.

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