Open AccessEffects of Different Activating Agent on the Physicochemical Properties of Rice Husk Derived Graphene (GRHA)
Author(s) -
Nur Fatihah Tajul Arifin,
Norhaniza Yusof,
Noor Afeefah Nordin,
Juhana Jaafar,
Ahmad Fauzi Ismail,
Farhana Aziz,
Wan Norharyati Wan Salleh
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/991/1/012112
Subject(s) - crystallinity , husk , potassium hydroxide , bet theory , nuclear chemistry , specific surface area , phosphoric acid , raman spectroscopy , amorphous solid , materials science , carbonization , chemistry , chemical engineering , organic chemistry , composite material , botany , scanning electron microscope , catalysis , physics , optics , engineering , biology
This paper proposes the preparation of rice husk derived graphene (GRHA) via chemical activation method using two different chemical activating agents namely phosphoric acid (H 3 PO 4 ) and potassium hydroxide (KOH). The purpose of this study is to study the impact of different activating agent on the physicochemical properties of GRHA. The rice husk was carbonized at 350 °C for 2 h and activated at 900 °C and 700 °C for GRHA-KOH and GRHA-H 3 PO 4 respectively. The prepared GRHA was characterized using X-ray Diffraction (XRD) analysis, Raman Spectroscopy and BET analysis. The crystallinity of each sample shows that the prepared GRHA is in amorphous state. On the other hand, the I D /I G ratio of GRHA-KOH is 0.45 while GRHA-H 3 PO 4 is 0.68 which suggest that both samples have high degree of graphitization. Interestingly, it was discovered that activation using KOH possesses a higher BET specific surface area (BET SSA ), 518.11 m 2 /g as compared to H 3 PO 4 which is only 315.07 m 2 /g. Thus, it shows that KOH was able to form GRHA with higher surface area and porosity.