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Type :thesis
Subject :TA Engineering (General). Civil engineering (General)
Main Author :Nur Jannah Idris
Title :Fabrication of sand/zinc oxide-based nanocomposite via sol-gel immersion method for photocatalysis application
Place of Production :Tanjong Malim
Publisher :Fakulti Sains dan Matematik
Year of Publication :2020
Notes :with CD
Corporate Name :Universiti Pendidikan Sultan Idris
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Abstract : Universiti Pendidikan Sultan Idris
This   study   aimed   to   fabricate   sand/zinc   oxide   (ZnO)   nanorods   (NRs)-based nanocomposite  via  sol-gel  immersion  method  with  titanium  dioxide  (TiO2)  and graphene oxide  (GO)-based materials for methylene blue (MB) dye degradation.The nanocomposite  photocatalyst  was   initially  fabricated  by  growing  ZnO  via  sol-gel immersion followed by synthesizing TiO2   using hydrothermal method on the sand as a substrate. Different concentration and synthesis time  were used as parameters for the fabrication.  These  nanocomposites  were  then  hybridized  with   GO  and  GO_multi- walled carbon nanotubes (MWCNTs) hybrid solution via immersion method. Prior to  hybridization, the initial GO was synthesized using electrochemical exfoliation method assisted by  commercially available single-tail sodium dodecyl sulphate surfactant and was further mixed with  MWCNTs to form GO_MWCNTs hybridsolution. The sand/ZnO, sand/ZnO/TiO2      nanocomposites,     and      sand/ZnO/TiO2/GO-based     photocatalyst materials  were  then  characterized  by  using   ultraviolet  (UV)-light  irradiation  within three-days   interval   for   MB   dye   degradation,    field   emission   scanning   electron microscopy     (FESEM),     micro-Raman     spectroscopy      and     ultraviolet-visible specstroscopy  (UV-vis).  The  finding,  sand/ZnO  NRs  (4h)   presented  the  highest photocatalysis performance (92.64%) as compared to sand/ZnO/TiO2  nanocomposite and and/ZnO/TiO2/GO-based photocatalyst materials. This was due to high density and  actives sites presented by sand/ZnO NRs (4h) which lead to higher adsorption of MB molecules on its  surfaces. As for the conclusion, sand/ZnO NRs (4h) demonstrated a potential ability to be applied  as a photocatalyst material to degrade MB solution. The implication  of  this  study  is  a  novel,   simpler,  low-cost  and  green  approach  for  the production  of  sand/ZnO,  sand/ZnO/TiO2   nanocomposites,  and  sand/ZnO/TiO2/GO-based photocatalyst materials for photocatalysis application.  

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