Sphere-like CoS with nanostructures as peroxidase mimics for colorimetric determination of H2O2 and mercury ions

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 66963-66970 ◽  
Author(s):  
Haiguan Yang ◽  
Junqi Zha ◽  
Peng Zhang ◽  
Yuhao Xiong ◽  
Linjing Su ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Analytical Techniques ◽  
Colorimetric Determination ◽  
Mercury Ions ◽  
Peroxidase Mimics ◽  
First Time ◽  
Facile Solvothermal Method

CoS, which was prepared using a facile solvothermal method, and characterized using various analytical techniques, was demonstrated for the first time to exhibit intrinsic peroxidase-like activity.

Convenient and sensitive colorimetric determination of alendronate sodium with Ce4+-triggered oxidation of TMB

2020 ◽  
Vol 44 (30) ◽  
pp. 12962-12966
Author(s):  
Jing Sun ◽  
Rui Wang ◽  
Meng Xia ◽  
Shuyun Zhu ◽  
Xian-En Zhao
Keyword(s):  
Colorimetric Assay ◽  
Colorimetric Determination ◽  
Selective Detection ◽  
Alendronate Sodium ◽  
First Time

A facile colorimetric assay for the sensitive and selective detection of alendronate sodium has been developed based on Ce4+-triggered oxidation of TMB for the first time.

CoMoO4 nanobelts as efficient peroxidase mimics for the colorimetric determination of H2O2

2020 ◽  
Vol 187 (8) ◽  
Author(s):  
Zhe Wang ◽  
Peng Ju ◽  
Yu Zhang ◽  
Fenghua Jiang ◽  
Haibing Ding ◽  
...  
Keyword(s):  
Colorimetric Determination ◽  
Peroxidase Mimics

Colorimetric Detection of Hg(II) Sensor Based on Mos2 Nanosheets Acting as Peroxidase Mimics

2021 ◽  
Vol 37 (3) ◽  
pp. 679-682
Author(s):  
S. Kavitha ◽  
S. Mary Jelastin Kala ◽  
A. Anand Babu Christus
Keyword(s):  
Colorimetric Detection ◽  
High Sensitivity ◽  
Colorimetric Determination ◽  
X Ray Diffraction ◽  
Mos2 Nanosheets ◽  
Peroxidase Mimic ◽  
Sem Image ◽  
Peroxidase Mimics ◽  
Ft Ir

This paper presents colorimetric determination of Hg(II) based on MoS2 nanosheets with peroxidase mimics activity. The structure of the this sensor by the peroxidase mimic activity material of MoS2 nanosheets with TMB (Tetramethylbenzidine) solution, the colorimetric detection target of Hg(II) is determined by on-off mechanism using biomolecule of cysteine. The MoS2 nanosheets evaluated by X-ray diffraction, FT-IR and SEM image, confirms formation of a flower like structure. Our results shows that a simple colorimetric detection using peroxidase mimic mechanism can be used to MoS2 nanosheets and determine the Hg(II) in aqueous solution with high sensitivity (10 nM) comparable to those of other nanomaterials. The result suggests that MoS2 nanosheets is a promising new and simple colorimetric sensor for applications in environmental and biological applications.

Quantitation of the Lateral Orientational Order in Poly(p-Phenylene Terephthalamide) Fibers with X-ray Linear Dichroism Microscopy

1998 ◽  
Vol 4 (S2) ◽  
pp. 812-813
Author(s):  
A. P. Smith ◽  
A. Garcia ◽  
H. Ade
Keyword(s):  
Internal Structure ◽  
Orientational Order ◽  
Analytical Techniques ◽  
Polymeric Materials ◽  
Linear Dichroism ◽  
Specific Chemical ◽  
X Ray ◽  
Radial Orientation ◽  
First Time

Determination of internal structure of complex polymeric materials often requires a variety of analytical techniques. One technique that we have developed and recently employed for the first time for quantitative analysis is x-ray linear dichroism microscopy. With sensitivity to the presence and orientation of specific chemical functionalities within polymer molecules, x-ray linear dichroism microscopy provides a powerful tool to probe the internal structure of such molecules. We have used this ability to quantitatively analyze the lateral orientational order (tangential and radial orientation of transverse sections) within different grades of poly(p-phenylene terephthalamide) (Kevlar) fibers.Kevlar fibers are highly crystalline and possess a complicated internal structure that exhibits lateral radial orientation. Figure 1 shows x-ray micrographs of (a) Kevlar 149, (b) Kevlar 49 and (c) Kevlar 29 fibers imaged at a photon energy specific to the aromatic functionality.

Fluorescent COFs with a highly conjugated structure for visual drug loading and responsive release

2020 ◽  
Vol 56 (4) ◽  
pp. 519-522 ◽  
Author(s):  
Bin Wang ◽  
Xicheng Liu ◽  
Peiwei Gong ◽  
Xingxing Ge ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Drug Loading ◽  
Naked Eye ◽  
Bright Fluorescence ◽  
First Time ◽  
Facile Solvothermal Method

For the first time, a facile solvothermal method to synthesize COFs with a nanosized structure and bright fluorescence was reported to monitor drug loading with the naked eye and realize responsive release.

High-Throughput Analytical Techniques for Determination of Residues of 653 Multiclass Pesticides and Chemical Pollutants in Tea, Part VI: Study of the Degradation of 271 Pesticide Residues in Aged Oolong Tea by Gas Chromatography-Tandem Mass Spectrometry and Its Application in Predicting the Residue Concentrations of Target Pesticides

2016 ◽  
Vol 99 (4) ◽  
pp. 1049-1057 ◽  
Author(s):  
Qiao-Ying Chang ◽  
Guo-Fang Pang ◽  
Chun-Lin Fan ◽  
Hui Chen ◽  
Zhi-Bin Wang
Keyword(s):  
Pesticide Residues ◽  
Analytical Techniques ◽  
Regression Equations ◽  
Oolong Tea ◽  
Chemical Pollutants ◽  
Chromatography Tandem Mass Spectrometry ◽  
Degradation Rates ◽  
Logarithmic Functions ◽  
First Time

Abstract The degradation rate of 271 pesticide residues in aged Oolong tea at two spray concentrations, named a and b (a < b), were monitored for 120 days using GC–tandem MS (GC-MS/MS). To research the degradation trends and establish regression equations, determination days were plotted as horizontal ordinates and the residue concentrations of pesticide were plotted as vertical ordinates. Here, we consider the degradation equations of 271 pesticides over 40 and 120 days, summarize the degradation rates in six aspects (A–F), and discuss the degradation trends of the 271 pesticides in aged Oolong tea in detail. The results indicate that >70% of the determined pesticides coincide with the degradation regularity of trends A, B, and E, i.e., the concentration of pesticide will decrease within 4 months. Next, 20 representative pesticides were selected for further study at higher spray concentrations, named c and d (d > c > b > a), in aged Oolong tea over another 90 days. The determination days were plotted on the x-axis, and the differences between each determined result and first-time-determined value of target pesticides were plotted on the y-axis. The logarithmic function was obtained by fitting the 90-day determination results, allowing the degradation value of a target pesticide on a specific day to be calculated. These logarithmic functions at d concentration were applied to predict the residue concentrations of pesticides at c concentration. Results revealed that 70% of the 20 pesticides had the lower deviation ratios of predicted and measured results.

3D Au-decorated BiMoO6 nanosheet/TiO2 nanotube array heterostructure with enhanced UV and visible-light photocatalytic activity

2017 ◽  
Vol 5 (31) ◽  
pp. 16412-16421 ◽  
Author(s):  
Jingsheng Cai ◽  
Jianying Huang ◽  
Yuekun Lai
Keyword(s):  
Visible Light ◽  
Environmental Remediation ◽  
Solvothermal Method ◽  
Electrochemical Polymerization ◽  
Tio2 Nanotube Array ◽  
Nanotube Array ◽  
Visible Light Driven ◽  
First Time ◽  
Facile Solvothermal Method ◽  
Visible Light Photocatalytic

To develop an efficient visible-light-driven photocatalyst electrode for environmental remediation, a novel ternary nanocomposite of an Au-decorated Bi2MoO6 nanosheet/TiO2 nanotube array (NTA) heterojunction was successfully fabricated for the first time via a facile solvothermal method combined with mussel-inspired functional modification of electrochemical polymerization of dopamine.

Colorimetric determination of Hg(II) sensor based on magnetic nanocomposite (Fe3O4@ZIF-67) acting as peroxidase mimics

2018 ◽  
Vol 364 ◽  
pp. 715-724 ◽  
Author(s):  
A. Anand Babu Christus ◽  
P. Panneerselvam ◽  
A. Ravikumar ◽  
Norhashimah Morad ◽  
S. Sivanesan
Keyword(s):  
Magnetic Nanocomposite ◽  
Colorimetric Determination ◽  
Peroxidase Mimics

scholarly journals Facile synthesis of Bi2MoO6–MIL-100(Fe) metal–organic framework composites with enhanced photocatalytic performance

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2943-2952 ◽  
Author(s):  
Jia Yang ◽  
Xiaojun Niu ◽  
Shaorong An ◽  
Weiyi Chen ◽  
Jie Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Solvothermal Method ◽  
Metal Organic Framework ◽  
Facile Synthesis ◽  
Excellent Photocatalytic Activity ◽  
Metal Organic ◽  
First Time ◽  
Facile Solvothermal Method ◽  
Organic Framework

A novel Bi2MoO6–MIL-100(Fe) photocatalyst was synthesized by a facile solvothermal method for the first time, and characterized by XRD, SEM, XPS, UV-vis, TEM, and PL. The Bi2MoO6–MIL-100(Fe) exhibited excellent photocatalytic activity and stability.

Smartphone Digital Image Colorimetric Determination of the Total Monomeric Anthocyanin Content in Black Rice via the pH Differential Method

2021 ◽  
Author(s):  
Chonlada Bennett ◽  
Phumon Sookwong ◽  
Jaroon Jakmunee ◽  
Sugunya Mahatheeranont
Keyword(s):  
Mobile Phone ◽  
Digital Image ◽  
Differential Method ◽  
Anthocyanin Content ◽  
Colorimetric Determination ◽  
Black Rice ◽  
System P ◽  
First Time

In this research, the pH differential method was explored for the first time using a mobile phone as a detector, replacing UV-Vis spectrophotometry. A smartphone digital image colorimetric (SDIC) system...

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