TY - JOUR
T1 - Green fabrication of novel LaCeO₃ decorated with CuO using Kigelia africana (lamb) benth leaf extract for photocatalytic degradation of malachite green
AU - Irbati, Rahma Demy Fitria
AU - Apriandanu, Dewangga Oky Bagus
AU - Rahayu, Mike
AU - Ananda, Vatra Reksa
AU - Yusuf, Muh Risky
AU - Chandren, Sheela
AU - Yulizar, Yoki
N1 - Publisher Copyright:
© 2025
PY - 2025/5
Y1 - 2025/5
N2 - This study successfully synthesized a novel LaCeO3/CuO nanocomposite using a green synthesis method mediated by Kigelia africana leaf extract (KALE). LaCeO3 is a perovskite with a significantly high band gap value between 3 and 3.19 eV. The combination with CuO, a cost-effective material that has a lower band gap of 1.2–2 eV, aims to reduce the overall band gap. This material modification will result in a heterojunction structure that boosts its photocatalytic performance. Characterization techniques such as FT-IR, UV-Vis DRS, XRD, HR-TEM, FESEM-EDX, and XPS validated the effective creation of the nanocomposite, which exhibited a unique morphology and a type S heterojunction structure. The LaCeO3/CuO nanocomposite exhibited a bandgap energy of 2.88 eV, placing it within the visible light spectrum. Experiments assessing its photocatalytic performance demonstrated that the LaCeO3/CuO nanocomposite effectively decomposed malachite green (MG) under visible light, achieving a maximum degradation efficiency of 92.88 % within 120 minutes. Kinetic investigations indicated that the reaction follows pseudo-first-order kinetics, exhibiting a rate constant of 6.19 × 10⁻² min⁻¹ . The ideal mass of the photocatalyst for the degradation of MG was found to be 30 mg. The study also investigated the influence of various factors, such as pH, the presence of anions, and the role of reactive oxygen species (ROS), affected photocatalytic activity. Results indicated that the LaCeO3/CuO nanocomposite exhibited optimal performance in neutral to mildly alkaline conditions. The presence of anions, particularly Cl⁻ and SO₄²⁻, negatively impacted photocatalytic activity. Furthermore, the LaCeO3/CuO nanocomposite demonstrated excellent reusability, maintaining high degradation efficiency over three consecutive cycles. These results emphasize the possible of the green-synthesized LaCeO3/CuO nanocomposite as a promising and sustainable photocatalyst for the effective removal of organic pollutants from wastewater.
AB - This study successfully synthesized a novel LaCeO3/CuO nanocomposite using a green synthesis method mediated by Kigelia africana leaf extract (KALE). LaCeO3 is a perovskite with a significantly high band gap value between 3 and 3.19 eV. The combination with CuO, a cost-effective material that has a lower band gap of 1.2–2 eV, aims to reduce the overall band gap. This material modification will result in a heterojunction structure that boosts its photocatalytic performance. Characterization techniques such as FT-IR, UV-Vis DRS, XRD, HR-TEM, FESEM-EDX, and XPS validated the effective creation of the nanocomposite, which exhibited a unique morphology and a type S heterojunction structure. The LaCeO3/CuO nanocomposite exhibited a bandgap energy of 2.88 eV, placing it within the visible light spectrum. Experiments assessing its photocatalytic performance demonstrated that the LaCeO3/CuO nanocomposite effectively decomposed malachite green (MG) under visible light, achieving a maximum degradation efficiency of 92.88 % within 120 minutes. Kinetic investigations indicated that the reaction follows pseudo-first-order kinetics, exhibiting a rate constant of 6.19 × 10⁻² min⁻¹ . The ideal mass of the photocatalyst for the degradation of MG was found to be 30 mg. The study also investigated the influence of various factors, such as pH, the presence of anions, and the role of reactive oxygen species (ROS), affected photocatalytic activity. Results indicated that the LaCeO3/CuO nanocomposite exhibited optimal performance in neutral to mildly alkaline conditions. The presence of anions, particularly Cl⁻ and SO₄²⁻, negatively impacted photocatalytic activity. Furthermore, the LaCeO3/CuO nanocomposite demonstrated excellent reusability, maintaining high degradation efficiency over three consecutive cycles. These results emphasize the possible of the green-synthesized LaCeO3/CuO nanocomposite as a promising and sustainable photocatalyst for the effective removal of organic pollutants from wastewater.
KW - Green synthesis
KW - Kigelia africana
KW - LaCeO/CuO
KW - Nanocomposite
UR - http://www.scopus.com/inward/record.url?scp=105001936987&partnerID=8YFLogxK
U2 - 10.1016/j.nanoso.2025.101474
DO - 10.1016/j.nanoso.2025.101474
M3 - Article
AN - SCOPUS:105001936987
SN - 2352-507X
VL - 42
JO - Nano-Structures and Nano-Objects
JF - Nano-Structures and Nano-Objects
M1 - 101474
ER -