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Influence of non-metal dopants (O, S, N) and dimension of carbon nano materials on the fluorescence and photocatalytic degradation of organic pollutants

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Title Influence of non-metal dopants (O, S, N) and dimension of carbon nano materials on the fluorescence and photocatalytic degradation of organic pollutants
 
Creator R, Usha
R, Fairlin Jenitha
S, Sudhaparimala
 
Subject Adsorption
Catalyst
Chlorophenols
Organic dyes
Fluorescence
Graphene
Graphene oxide
Hydrothermal
Nitrogen doped Carbon quantum dots
Nitrogen doped graphene oxide
Sulphur doped graphene oxide
 
Description 485-494
The usage of sanitizers and disinfectants results in the dumping of toxic organic residues in water. There is a global need
for effective agents which can adsorb and degrade hazardous chemicals effectively and convert into much safer
constituents. In this study, the influence of non-metal dopants (O, S, N) and dimensionality on the catalytic ability of carbon
nanomaterials (CNs) such as 0-D (Nitrogen-doped Carbon quantum dots (N-CQDs) synthesized from the seed kernel
of Caesalpinia bonducella) and 2-D (Graphene oxide (GO), Sulphur doped graphene oxide (S-GO), Nitrogen-doped
graphene oxide (N-GO) synthesized from glucose) have been compared and correlated. The microstructure, surface
morphology, elemental composition, fluorescence emission and catalytic ability of the 0-D and 2-D materials are determined
and compared. The defect density and the sub defect band gap states influenced by different electronegative non-metal
dopants and the dimensions are discussed. The Micro strain increases with increases in dimension. The percentage of
Nitrogen as dopant in N-GO is relatively less compared with N-CQDs which led to less fluorescence intensity observed in
N-GO. On comparison of the results, it is evident that greater electro negativity of the dopants and reduction in dimension
will increase the photo catalytic activity. Also, in comparison with 2-D structures, the large surface area and greater
quantum confinement of 0-D structure enhance the degradation of organic pollutants. This observation is well correlated
with PL emission intensities of the compared CNs. The results provide a better correlation between dimensionality and
functionality of CNs and their impact on catalytic (adsorption and photo) applications in experimentally possible ways.
 
Date 2022-08-31T08:19:05Z
2022-08-31T08:19:05Z
2022-09
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/60434
https://doi.org/10.56042/ijct.v29i5.61639
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.29(5) [September 2022]