Fast and Sensitive Detection of Bisphenol A and 4-n-Octylphenol in Foods Based on a 2D Graphitic Carbon Nitride (g-C3N4)/Gold Nano-Composite Film

2021 ◽  
Author(s):  
Miaomiao Zou ◽  
Suyan Zou ◽  
Chunyan Hu ◽  
Xiaoyun Lin ◽  
Yongnian Ni
Keyword(s):  
Bisphenol A ◽  
Composite Film ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Sensitive Detection ◽  
Nano Composite

scholarly journals Mono-dispersed Ag nanoparticles decorated graphitic carbon nitride: An excellent lubricating additive as PPESK composite film

Friction ◽  
2021 ◽  
Author(s):  
Beibei Chen ◽  
Mengjie Zhang ◽  
Kan Zhang ◽  
Zhe Dong ◽  
Jiaye Li ◽  
...  
Keyword(s):  
Composite Film ◽  
Ag Nanoparticles ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Great Promise ◽  
Theoretical Simulation ◽  
Heavy Loads ◽  
20 Nm ◽  
Ball On Disc

AbstractStudies show that two dimensional (2D) nanomaterial and its hybrid have a great promise in tribology for the special laminar microstructure. However, the majority of performed investigations about 2D graphitic carbon nitride (g-C3N4) nanosheets are most focused on energy storage, catalysis, adsorption, rarely tribology. In the present study, g-C3N4 supporting mono-dispersed Ag nanoparticle hybrid (g-C3N4/Ag) is prepared, and its microstructure and chemical composition are determined. More specifically, the tribological performance as the lubricating additive of poly phthalazinone ether sulfone ketone (PPESK) composite is investigated using the ball-on-disc friction tester. Moreover, the corresponding enhancement mechanism is well proposed based on the experimental analysis and theoretical simulation. Obtained results show that Ag nanoparticles with a size of about 10–20 nm are homogeneously anchored on g-C3N4 nanosheets, favoring for good compatibility between g-C3N4/Ag and PPESK. It is found that when 0.3 wt% of g-C3N4/Ag is added to PPESK, the friction coefficient and wear rate of PPESK decrease by 68.9% and 97.1%, respectively. These reductions are mainly attributed to the synergistic self-lubricating effect of Ag nanoparticles and g-C3N4 nanosheet, the formation of transfer film, as well as the limited effect of g-C3N4/Ag on the shear deformation of PPESK composite film. Furthermore, it is found that the proposed g-C3N4/Ag-PPESK composite still keeps reasonable friction-reducing and wear-resistant properties under heavy loads and high rotating speeds. The present study demonstrates that the proposed g-C3N4/Ag hybrid is an excellent lubricating additive for polymer composites.

High performance Pb (II) electrochemical sensor based on spherical CuS nanoparticles anchored g-C3N4

2021 ◽  
Author(s):  
Jingheng Ning ◽  
Jiaqian Wei ◽  
Shouen Huang ◽  
Faxiang Wang ◽  
xin luo ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Copper Sulfide ◽  
High Performance ◽  
Carbon Nitride ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Sensitive Detection ◽  
Anodic Stripping

A new electrochemical sensor has been constructed for ultra-sensitive detection of lead ions (Pb2+) by square wave anodic stripping voltammetry (SWASV), based on copper sulfide/graphitic carbon nitride nanocomposite modified glassy...

Copper nanoparticles modified graphitic carbon nitride nanosheets as a peroxidase mimetic for glucose detection

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91302-91307 ◽  
Author(s):  
Nan Wang ◽  
Zhenwei Han ◽  
Hai Fan ◽  
Shiyun Ai
Keyword(s):  
Copper Nanoparticles ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Sensitive Detection ◽  
Glucose Detection ◽  
Peroxidase Mimic ◽  
Peroxidase Mimetic ◽  
Carbon Nitride Nanosheets

Cu NPs/g-C3N4 was successfully prepared by the calcination of dicyandiamide–Cu2+ complex as a peroxidase mimic for sensitive detection of glucose.

A first blue fluorescence composite film based on graphitic carbon nitride nanosheets/polyoxometalate for application in reversible electroluminescence switching

2019 ◽  
Vol 7 (11) ◽  
pp. 3253-3262 ◽  
Author(s):  
Zhijing Fu ◽  
Zhiyuan Ma ◽  
Tian Yu ◽  
Lihua Bi
Keyword(s):  
Composite Film ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Blue Fluorescence ◽  
Lbl Assembly ◽  
Fluorescence Switch ◽  
Carbon Nitride Nanosheets

A composite film containing g-C3N4NS and SiMoW was constructed by LBL assembly to realize fluorescence switch regulation.

scholarly journals Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

2018 ◽  
Vol 9 ◽  
pp. 353-363 ◽  
Author(s):  
Lan Ching Sim ◽  
Jing Lin Wong ◽  
Chen Hong Hak ◽  
Jun Yan Tai ◽  
Kah Hon Leong ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Bisphenol A ◽  
Carbon Nitride ◽  
Separation Efficiency ◽  
Sugarcane Juice ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Dominant Factor ◽  
Spectroscopic Techniques ◽  
X Ray

Carbon dots (CDs) and graphitic carbon nitride (g-C3N4) composites (CD/g-C3N4) were successfully synthesized by a hydrothermal method using urea and sugarcane juice as starting materials. The chemical composition, morphological structure and optical properties of the composites and CDs were characterized using various spectroscopic techniques as well as transmission electron microscopy. X-ray photoelectron spectroscopy (XPS) results revealed new signals for carbonyl and carboxyl groups originating from the CDs in CD/g-C3N4 composites while X-ray diffraction (XRD) results showed distortion of the host matrix after incorporating CDs into g-C3N4. Both analyses signified the interaction between g-C3N4 and CDs. The photoluminescence (PL) analysis indicated that the presence of too many CDs will create trap states at the CD/g-C3N4 interface, decelerating the electron (e−) transport. However, the CD/g-C3N4(0.5) composite with the highest coverage of CDs still achieved the best bisphenol A (BPA) degradation rate at 3.87 times higher than that of g-C3N4. Hence, the charge separation efficiency should not be one of the main factors responsible for the enhancement of the photocatalytic activity of CD/g-C3N4. Instead, the light absorption capability was the dominant factor since the photoreactivity correlated well with the ultraviolet–visible diffuse reflectance spectra (UV–vis DRS) results. Although the CDs did not display upconversion photoluminescence (UCPL) properties, the π-conjugated CDs served as a photosensitizer (like organic dyes) to sensitize g-C3N4 and injected electrons to the conduction band (CB) of g-C3N4, resulting in the extended absorption spectrum from the visible to the near-infrared (NIR) region. This extended spectral absorption allows for the generation of more electrons for the enhancement of BPA degradation. It was determined that the reactive radical species responsible for the photocatalytic activity were the superoxide anion radical (O2 •−) and holes (h+) after performing multiple scavenging tests.

Graphitic Carbon Nitride with Carbon Vacancies for Photocatalytic Degradation of Bisphenol A

2018 ◽  
Vol 2 (1) ◽  
pp. 517-524 ◽  
Author(s):  
Xiaofei Liang ◽  
Guanlong Wang ◽  
Xiaoli Dong ◽  
Guowen Wang ◽  
Hongchao Ma ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride
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