TY - JOUR
T1 - Waste Derived Graphene Oxide-ZnO
T2 - An Efficient Photocatalyst for Rhodamine 6G
AU - Rashid, Mohd
AU - Al-Zaqri, Nabil
AU - Guerrero-Barajas, Claudia
AU - Hussain, Fida
AU - Ibrahim, Mohamad Nasir Mohamad
N1 - Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/11
Y1 - 2022/11
N2 - The catalyst’s photocatalytic activity under sunlight was tested using graphene oxide (GO) from plant cellulose waste and modified by ZnO nanomaterial. The absorbance of the dye’s solution (Rhodamine 6G) was recorded as λmax = 555 nm at regular time intervals. The degradation kinetics of rhodamine was evaluated by applying first-order integrated rate expression, kt = −ln (C/C0). The half-life (t1/2 ), the rate constant (k), and the time constant τ (Tau) have been obtained by the above rate expression. The rate constant of the reactions carried out with the different materials was calculated and the values obtained were: k_ZnO =1.574 × 10−2, k_GO =1.01 × 10−2 and k_C-GO-ZnO = 4.7 × 10−3 min−1 . The degradation efficiency presented by GO, ZnO and GO-ZnO catalysts was 66.67, 70.84, and 70.07%, respectively. FTIR spectroscopy was used to investigate the interactions between the catalyst and the dye. To the best of our knowledge, waste-derived GO-ZnO has not been previously reported for the photocatalytic degradation of Rhodamine 6G.
AB - The catalyst’s photocatalytic activity under sunlight was tested using graphene oxide (GO) from plant cellulose waste and modified by ZnO nanomaterial. The absorbance of the dye’s solution (Rhodamine 6G) was recorded as λmax = 555 nm at regular time intervals. The degradation kinetics of rhodamine was evaluated by applying first-order integrated rate expression, kt = −ln (C/C0). The half-life (t1/2 ), the rate constant (k), and the time constant τ (Tau) have been obtained by the above rate expression. The rate constant of the reactions carried out with the different materials was calculated and the values obtained were: k_ZnO =1.574 × 10−2, k_GO =1.01 × 10−2 and k_C-GO-ZnO = 4.7 × 10−3 min−1 . The degradation efficiency presented by GO, ZnO and GO-ZnO catalysts was 66.67, 70.84, and 70.07%, respectively. FTIR spectroscopy was used to investigate the interactions between the catalyst and the dye. To the best of our knowledge, waste-derived GO-ZnO has not been previously reported for the photocatalytic degradation of Rhodamine 6G.
KW - cellulose-waste
KW - graphene oxide (GO)
KW - photocatalyst
KW - rhodamine 6G
KW - time-constant photodegradation
UR - http://www.scopus.com/inward/record.url?scp=85147810951&partnerID=8YFLogxK
U2 - 10.3390/pr10112266
DO - 10.3390/pr10112266
M3 - Artículo
AN - SCOPUS:85147810951
SN - 2227-9717
VL - 10
JO - Processes
JF - Processes
IS - 11
M1 - 2266
ER -