Strobilanthes crispus (B.) leaf extract-assisted green synthesis of ZnO-La2O3 composite and preliminary study of its photocatalytic activity

R. I. Ashna; Y. Yulizar; D. O.B. Apriandanu

doi:10.1088/1757-899X/763/1/012004

Strobilanthes crispus (B.) leaf extract-assisted green synthesis of ZnO-La₂O₃ composite and preliminary study of its photocatalytic activity

R. I. Ashna, Y. Yulizar, D. O.B. Apriandanu

Department of Chemistry

Research output: Contribution to journal › Conference article › peer-review

10 Citations (Scopus)

Abstract

In this study, ZnO-La₂O₃ composite as photocatalyst was synthesized via facile sol-gel route using biomaterial as a weak base source and a capping agent. ZnO-La₂O₃ composite was successfully formed through the reaction of Zn(NO₃)₂ (aq), La(NO₃)₃ (aq) and Strobilanthes crispus (B.) aqueous leaf extract. Zn-O and La-O vibration modes of ZnO-La₂O₃ composite was analysed by Fourier Transform Infra Red (FTIR) at 400-700 cm^-1 wavenumber. Optical band gap of ZnO-La₂O₃ composite determined by using Tauc plot method was about 5.21 eV. X-Ray Diffraction (XRD) pattern of ZnO-La₂O₃ composite confirmed a combination of the diffraction patterns of ZnO particle and La₂O₃ particle. Photocatalytic activity of ZnO-La₂O₃ composite and ZnO particle were observed with methylene blue using UV light irradiation. The percentage of methylene blue degradation using ZnO-La₂O₃ composite and ZnO particle were 81.75 % and 74.87 %, respectively. This result shows that La₂O₃ was improving the activity and stability of the ZnO photocatalyst.

Original language	English
Article number	012004
Journal	IOP Conference Series: Materials Science and Engineering
Volume	763
Issue number	1
DOIs	https://doi.org/10.1088/1757-899X/763/1/012004
Publication status	Published - 28 Apr 2020
Event	3rd International Symposium on Current Progress in Functional Materials 2018, ISCPFM 2018 - Depok, Indonesia Duration: 8 Aug 2018 → 9 Aug 2018

Keywords

green synthesis
methylene blue
photocatalyst
Strobilanthes crispus (B.)
ZnOLa O composite

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10.1088/1757-899X/763/1/012004

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title = "Strobilanthes crispus (B.) leaf extract-assisted green synthesis of ZnO-La2O3 composite and preliminary study of its photocatalytic activity",

abstract = "In this study, ZnO-La2O3 composite as photocatalyst was synthesized via facile sol-gel route using biomaterial as a weak base source and a capping agent. ZnO-La2O3 composite was successfully formed through the reaction of Zn(NO3)2 (aq), La(NO3)3 (aq) and Strobilanthes crispus (B.) aqueous leaf extract. Zn-O and La-O vibration modes of ZnO-La2O3 composite was analysed by Fourier Transform Infra Red (FTIR) at 400-700 cm-1 wavenumber. Optical band gap of ZnO-La2O3 composite determined by using Tauc plot method was about 5.21 eV. X-Ray Diffraction (XRD) pattern of ZnO-La2O3 composite confirmed a combination of the diffraction patterns of ZnO particle and La2O3 particle. Photocatalytic activity of ZnO-La2O3 composite and ZnO particle were observed with methylene blue using UV light irradiation. The percentage of methylene blue degradation using ZnO-La2O3 composite and ZnO particle were 81.75 % and 74.87 %, respectively. This result shows that La2O3 was improving the activity and stability of the ZnO photocatalyst.",

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AU - Yulizar, Y.

AU - Apriandanu, D. O.B.

PY - 2020/4/28

Y1 - 2020/4/28

N2 - In this study, ZnO-La2O3 composite as photocatalyst was synthesized via facile sol-gel route using biomaterial as a weak base source and a capping agent. ZnO-La2O3 composite was successfully formed through the reaction of Zn(NO3)2 (aq), La(NO3)3 (aq) and Strobilanthes crispus (B.) aqueous leaf extract. Zn-O and La-O vibration modes of ZnO-La2O3 composite was analysed by Fourier Transform Infra Red (FTIR) at 400-700 cm-1 wavenumber. Optical band gap of ZnO-La2O3 composite determined by using Tauc plot method was about 5.21 eV. X-Ray Diffraction (XRD) pattern of ZnO-La2O3 composite confirmed a combination of the diffraction patterns of ZnO particle and La2O3 particle. Photocatalytic activity of ZnO-La2O3 composite and ZnO particle were observed with methylene blue using UV light irradiation. The percentage of methylene blue degradation using ZnO-La2O3 composite and ZnO particle were 81.75 % and 74.87 %, respectively. This result shows that La2O3 was improving the activity and stability of the ZnO photocatalyst.

AB - In this study, ZnO-La2O3 composite as photocatalyst was synthesized via facile sol-gel route using biomaterial as a weak base source and a capping agent. ZnO-La2O3 composite was successfully formed through the reaction of Zn(NO3)2 (aq), La(NO3)3 (aq) and Strobilanthes crispus (B.) aqueous leaf extract. Zn-O and La-O vibration modes of ZnO-La2O3 composite was analysed by Fourier Transform Infra Red (FTIR) at 400-700 cm-1 wavenumber. Optical band gap of ZnO-La2O3 composite determined by using Tauc plot method was about 5.21 eV. X-Ray Diffraction (XRD) pattern of ZnO-La2O3 composite confirmed a combination of the diffraction patterns of ZnO particle and La2O3 particle. Photocatalytic activity of ZnO-La2O3 composite and ZnO particle were observed with methylene blue using UV light irradiation. The percentage of methylene blue degradation using ZnO-La2O3 composite and ZnO particle were 81.75 % and 74.87 %, respectively. This result shows that La2O3 was improving the activity and stability of the ZnO photocatalyst.

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KW - methylene blue

KW - photocatalyst

KW - Strobilanthes crispus (B.)

KW - ZnOLa O composite

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Strobilanthes crispus (B.) leaf extract-assisted green synthesis of ZnO-La₂O₃ composite and preliminary study of its photocatalytic activity

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Keywords

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