TY - JOUR
T1 - Facile synthesis of composite between titania nanoparticles with highly exposed (001) facet and coconut shell-derived graphene oxide for photodegradation of methylene blue
AU - Yunarti, Rika Tri
AU - Safitri, Tatya Najla
AU - Dimonti, Lizbeth Cantik Christina
AU - Aulia, Ghufran
AU - Khalil, Munawar
AU - Ridwan, Muhammad
N1 - Funding Information:
The authors would like to thank Universitas Indonesia for funding this research through PUTI Grant with contract number NKB-1639/UN2.RST/HKP.05.00/2020 .
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - The degradation of organic dye molecules through the photocatalysis process has been explored widely by researchers. There have been many attempts to create photocatalyst material that meets the qualities required, one of which is the synthesis of TiO2 nanocomposite. In this study, modifications on TiO2 were made to enhance its photocatalytic activity, namely by exposing the (001) crystal facet of TiO2 and integrating graphene oxide in the catalyst to form TiO2/GO nanocomposite. From the characterizations carried out in this study, TiO2/GO nanocomposite with exposed (001) crystal facet has been successfully synthesized. The exposure percentage of the (001) facet is observed at the value of 13.47% and 15.54% for two TiO2/GO samples with a different titania precursor source. Furthermore, the photocatalytic performance test shows that this percentage of exposure, along with graphene oxide in the nanocomposite, does affect the photodegradation percentage of methylene blue. The photocatalyst samples worked well under irradiation of visible light, which has successfully degraded methylene blue solution by up to 51.30% for the reaction of 1 h. This improvement in the photodegradation process is presumed to result from the exposed (001) facet that provides more reactivity to generate radical species and the graphene oxide that assists charge separation well.
AB - The degradation of organic dye molecules through the photocatalysis process has been explored widely by researchers. There have been many attempts to create photocatalyst material that meets the qualities required, one of which is the synthesis of TiO2 nanocomposite. In this study, modifications on TiO2 were made to enhance its photocatalytic activity, namely by exposing the (001) crystal facet of TiO2 and integrating graphene oxide in the catalyst to form TiO2/GO nanocomposite. From the characterizations carried out in this study, TiO2/GO nanocomposite with exposed (001) crystal facet has been successfully synthesized. The exposure percentage of the (001) facet is observed at the value of 13.47% and 15.54% for two TiO2/GO samples with a different titania precursor source. Furthermore, the photocatalytic performance test shows that this percentage of exposure, along with graphene oxide in the nanocomposite, does affect the photodegradation percentage of methylene blue. The photocatalyst samples worked well under irradiation of visible light, which has successfully degraded methylene blue solution by up to 51.30% for the reaction of 1 h. This improvement in the photodegradation process is presumed to result from the exposed (001) facet that provides more reactivity to generate radical species and the graphene oxide that assists charge separation well.
KW - Exposed facet
KW - Graphene oxide nanocomposite
KW - Methylene blue
KW - Photodegradation
KW - TiO
UR - http://www.scopus.com/inward/record.url?scp=85113970175&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2021.110357
DO - 10.1016/j.jpcs.2021.110357
M3 - Article
AN - SCOPUS:85113970175
SN - 0022-3697
VL - 160
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
M1 - 110357
ER -