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Low Cost Graphene Oxide Modified Alumina Nanocomposite as Solar Light Induced Photocatalyst
journal contribution
posted on 2018-08-13, 00:00 authored by Anum Iqbal, Shamaila Sajjad, Sajjad Ahmed Khan LeghariA new wet chemical
methodology is introduced for high quality Al2O3 microflowers using aluminum foil as a cheaper
precursor for the first time and sodium dodecyl sulfate as template.
The gamma alumina (γ-Al2O3) is prepared
with excellent catalytic properties having small crystallite size
with decreased band gap in comparison to its bulk state. This can
be attributed to morphological planar defects like stepped surfaces
in brick morphology. Such planar defects allow electronic transitions
under solar light in pure Al2O3. Moreover, a
novel heterojunction of Al2O3 and graphene oxide
(GO) is developed as an efficient photocatalyst under solar light.
Well incorporated GO sheets within the alumina matrix have been presented
in SEM images of composites. The marvelous photocatalytic performance
of 15.0% GO/Al2O3 hybrid is recorded under solar
light. The new composite material possesses the extended spectral
response and exhibits reduce electron–hole pair recombination
chances due to the incorporation of GO sheets. Furthermore, mechanism
and kinetics of degradation are studied. The cost analysis is performed
which shows that Al2O3 prepared by this method
is 1000 times cheaper than available Al2O3 by
Sigma-Aldrich. This investigation leads to economic future development
of effective Al2O3 based photoactive materials
for catalysis and other solar light induced energy applications.
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band gapsodium dodecyl sulfatefuture developmentSEM imagesphotoactive materialsLow Cost Graphene Oxide Modified Alumina Nanocompositebrick morphologycost analysisAl 2 O 3graphene oxidealuminum foilcrystallite sizequality Al 2 O 3 microflowersalumina matrixbulk statephotocatalytic performancenovel heterojunction1000 timesSolar Light Induced Photocatalystchemical methodologyenergy applications
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