Please use this identifier to cite or link to this item:
Title: Polyoxometalates for bifunctional applications: catalytic dye degradation and anticancer activity
Authors: Ong, Boon Chong
Lim, Hong Kit
Tay, Chor Yong
Lim, Teik-Thye
Dong, Zhili
Keywords: Engineering::Materials
Issue Date: 2022
Source: Ong, B. C., Lim, H. K., Tay, C. Y., Lim, T. & Dong, Z. (2022). Polyoxometalates for bifunctional applications: catalytic dye degradation and anticancer activity. Chemosphere, 286(Part 3), 131869-.
Project: RG102/18
Journal: Chemosphere
Abstract: Improving the efficiencies of organic compound degradations by catalytic materials is a challenging materials research field. In our research, we successfully synthesized cobalt-based polyoxometalates (CoV-POMs) via a simple crystallization-driven self-assembly method. The incorporation of the newly synthesized CoV-POMs into peroxymonosulphate (PMS), forming a mixture, greatly enhancing the catalytic activation for a complete degradation of dye solution. The positive synergic effect between CoV-POMs and PMS was substantiated by a relatively meager degradation of less than 10% in the system without CoV-POMs, in which CoV-POMs played a vital role to activate PMS towards free radicals generation for dye degradation. Methylene blue (MB) and rhodamine B (RB) dyes were completely decolorized under 60 min with the presence of 40 mg/L CoV-POMs and 150 mg/L PMS. The CoV-POMs/PMS system was pH dependance with a lower dye degradation efficiency at elevated pH. The effect of pH was more prominent in RB dye, in which the degradation efficiency dropped drastically from 93.3% to 41.12% with the increase in the solution pH from 7 to 11. The quenching tests suggested that sulfate radicals were the dominant active species involving in the dye degradation reaction. Besides MB and RB dyes, CoV-POMs/PMS system also showed significant activity towards the degradation of phenol red (PR) and methyl orange (MO) dyes. In the biological test, CoV-POMs exhibited non-toxic behavior towards normal cells that reduced safety concern for the large-scale wastewater treatment application. In addition, the testing divulged the anticancer property of CoV-POMs with more than 35 % of A549 lung adenocarcinoma and MDA-MB-231 breast adenocarcinoma were killed with 250 mg/L CoV-POMs. The selective lethality of CoV-POMs towards cancer cells was found to be caused by different extents of cellular apoptosis. In overall, the synthesized bifunctional CoV-POMs manifested superior activities in the examined applications, specifically dye degradation and anticancer.
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2021.131869
Rights: © 2021 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20240207
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
ERI@N Journal Articles
MSE Journal Articles
NEWRI Journal Articles
SBS Journal Articles

Files in This Item:
File Description SizeFormat 
Polyoxometalates for bifunctional applications Catalytic dye degradation and anticancer activity.pdf
  Until 2024-02-07
2.02 MBAdobe PDFUnder embargo until Feb 07, 2024

Citations 50

Updated on May 1, 2022

Citations 20

Updated on May 1, 2022

Page view(s)

Updated on May 16, 2022

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.