TY - JOUR
T1 - Visible light-driven photocatalytic rapid degradation of organic contaminants engaging manganese dioxide-incorporated iron oxide three dimensional nanoflowers
AU - Rabani, Iqra
AU - Bathula, Chinna
AU - Zafar, Rabia
AU - Shoaib Tahir, Muhammad
AU - Park, Ye Jee
AU - Kim, Hyun Seok
AU - Naushad, Mu
AU - Seo, Young Soo
N1 - Publisher Copyright:
© 2021 Elsevier Inc.
PY - 2022/2/15
Y1 - 2022/2/15
N2 - Water pollution via hazardous organic pollutants poses a high threat to the environment and globally imperils aquatic life and human health. Therefore, the elimination of toxic organic waste from water sources is vital to ensure a healthy green environment. In the current work, we synthesized α-MnO2-Fe3O4 3D-flower like structure using a two-step hydrothermal method and explored the combination in a visible-light-assisted photocatalytic degrdation of dyes. The attained high specific surface area of 82 m2/g with mesoporous nature of α-MnO2 and Fe3O4 together can generate more active sites after exposure to visible light, leading to remarkable photodegradation performance. Significantly, twofold higher dye (methylene blue, MB (94.8%/120 min; crystal violet, CV (93.7%/120 min)) and drug (LVO 91%/90 min) photodegradations were observed with α-MnO2-Fe3O4 as catalyst than pure α-MnO2 and Fe3O4 at pH 6, respectively. This is attributed to the higher surface area and synergistic effect between Mn and Fe. More than 85% stability was observed with optimized catalysts employing MB and CV dyes, demonstrating the excellent reusability of the α-MnO2-Fe3O4. The underlying mechanism indicates that the formation of reactive oxygen species predominantly plays a role in the photodegradation of dyes under visible light. Consequently, these new insights will shed light on the practical applications of the α-MnO2-Fe3O4 3D-flower-like spherical structure for eco-friendly remediation via wastewater treatment.
AB - Water pollution via hazardous organic pollutants poses a high threat to the environment and globally imperils aquatic life and human health. Therefore, the elimination of toxic organic waste from water sources is vital to ensure a healthy green environment. In the current work, we synthesized α-MnO2-Fe3O4 3D-flower like structure using a two-step hydrothermal method and explored the combination in a visible-light-assisted photocatalytic degrdation of dyes. The attained high specific surface area of 82 m2/g with mesoporous nature of α-MnO2 and Fe3O4 together can generate more active sites after exposure to visible light, leading to remarkable photodegradation performance. Significantly, twofold higher dye (methylene blue, MB (94.8%/120 min; crystal violet, CV (93.7%/120 min)) and drug (LVO 91%/90 min) photodegradations were observed with α-MnO2-Fe3O4 as catalyst than pure α-MnO2 and Fe3O4 at pH 6, respectively. This is attributed to the higher surface area and synergistic effect between Mn and Fe. More than 85% stability was observed with optimized catalysts employing MB and CV dyes, demonstrating the excellent reusability of the α-MnO2-Fe3O4. The underlying mechanism indicates that the formation of reactive oxygen species predominantly plays a role in the photodegradation of dyes under visible light. Consequently, these new insights will shed light on the practical applications of the α-MnO2-Fe3O4 3D-flower-like spherical structure for eco-friendly remediation via wastewater treatment.
KW - 3D-flower like spherical structure
KW - Photocatalysis activity
KW - Wastewater treatment
KW - α-MnO-FeO
UR - http://www.scopus.com/inward/record.url?scp=85118724544&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2021.10.149
DO - 10.1016/j.jcis.2021.10.149
M3 - Article
C2 - 34763888
AN - SCOPUS:85118724544
SN - 0021-9797
VL - 608
SP - 2347
EP - 2357
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -