Photosono activation of peroxymonosulfate using A3B phthalocyanines supported on titanium dioxide nanofibers for degradation of Rhodamine 6G

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Synthetic Metals Pub Date : 2024-07-14 DOI:10.1016/j.synthmet.2024.117699

Siphumelele Thandokwazi Mkhondwane, Godfred Sebiawu, Sithi Mgidlana, Yolande Openda, Nnamdi Nwahara, John Mack, Tebello Nyokong

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Abstract

The development of efficient processes for the removal of organic compounds in wastewater is highly necessary for the sustainable development of the society. In this study, we report on the photo, sono and photosono-activation of peroxymonosulfate (PMS) using A₃B phthalocyanines (Pcs) functionalized titanium dioxide (TiO₂) nanofibers as catalysts for the degradation of Rhodamine 6 G. The catalysts were characterized using various spectroscopic and microscopic techniques. The functionalized fibers displayed enhanced degradation efficiency compared to individual Pc analogous and pristine TiO₂ fibers. The addition of PMS resulted in the complete degradation of Rhodamine 6G. Electron paramagnetic resonance (EPR) spectroscopy and reactive oxygen species scavenging studies revealed that photocatalytic process is instigated by ¹O₂, ^•O₂ and SO₄^•, whereas sono and photosono-catalytic processes are instigated by ¹O₂, ^•OH, ^•O₂ and SO₄^•. The results reveal that the developed process has the potential of being used as a future technology for the degradation of organic pollutants.

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使用二氧化钛纳米纤维支撑的 A3B 酞菁对过氧单硫酸盐进行光活化以降解罗丹明 6G

为实现社会的可持续发展，开发去除废水中有机化合物的高效工艺是非常必要的。在本研究中，我们报告了使用 A3B 酞菁（Pcs）功能化二氧化钛（TiO2）纳米纤维作为催化剂对过氧单硫酸盐（PMS）进行光、声波和光子活化以降解罗丹明 6 G 的情况。与单独的 Pc 类似纤维和原始 TiO2 纤维相比，功能化纤维显示出更高的降解效率。加入 PMS 后，罗丹明 6G 得到完全降解。电子顺磁共振（EPR）光谱和活性氧清除研究表明，光催化过程由 1O2、-O2 和 SO4-引发，而声纳和光催化过程则由 1O2、-OH、-O2 和 SO4-引发。结果表明，所开发的工艺有可能成为未来降解有机污染物的一种技术。

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.