Synthesis of ZnO/ECB (Eichhornia crassipes Biochar) as a Sustainable Efficient Photocatalyst for Photodegradation of Reactive Black-5

DOI

10.2991/aer.k.211222.012How to use a DOI?

Keywords

Photocatalyst; ZnO; Eichhornia crassipes; Biochar; Reactive Black-5

Abstract

ZnO/ECB photocatalyst (Eichhornia crassipes Biochar) has been synthesized to be applied as a photocatalyst in the degradation of Reactive Black-5 dye. ZnO/ECB photocatalyst was synthesized by the coprecipitation method with the ratio Zn(NO₃)_2.6H₂O:ECB (M:w) 0.25:1 (_0.25MZnO/ECB); 0.45:1 (_0.45MZnO/ECB); and 0.6;1 (_0.6MZnO/ECB). The characteristics of the ZnO/ECB photocatalyst were tested using X-ray diffraction, Fourier Transforms Infrared (FTIR), and UV Diffuse Reflectance Spectroscopy (UV-DRS) to determine the energy gap of the photocatalyst. The diffractogram pattern showed that the ZnO/ECB crystals were hexagonal wurtzite in shape. The results of the Kubelka-Munk UV-DRS analysis showed that the energy gap of the ZnO/ECB photocatalyst was smaller than that of pure ZnO. The efficiency of the ZnO/ECB catalyst was evaluated through photocatalytic degradation of an aqueous solution of Reactive Black-5 dye. Measurement of photocatalytic activity under UV radiation showed that ZnO/ECB photocatalyst has a higher degradation ability than pure ZnO. The high photocatalytic activity of the ZnO/ECB catalyst was due to the low energy gap of the ZnO/ECB catalyst, thereby reducing the electron and hole recombination rate in the synthesized photocatalyst. Photocatalyst of _0.25ZnO/ECB has the highest photocatalytic activity with degradation efficiency reaching 75.47%.

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - M. Mulyatun
AU  - Wirda Udaibah
AU  - Siti Hafidzotur
AU  - Hamdan Hadi Kusuma
PY  - 2021
DA  - 2021/12/23
TI  - Synthesis of ZnO/ECB (Eichhornia crassipes Biochar) as a Sustainable Efficient Photocatalyst for Photodegradation of Reactive Black-5
BT  - Proceedings of the International Conference on Science and Engineering (ICSE-UIN-SUKA 2021)
PB  - Atlantis Press
SP  - 78
EP  - 85
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211222.012
DO  - 10.2991/aer.k.211222.012
ID  - Mulyatun2021
ER  -