Manganese oxide nanorods as a robust Fenton-like catalyst at neutral pH: Crystal phase-dependent behavior

Kim, Eunju; Oh, Dasom; Lee, Chung-Seop; Gong, Jianyu; Kim, Jungwon; Chang, Yoon Seok

doi:10.1016/j.cattod.2016.03.034

Cited by 79 publications

(18 citation statements)

References 49 publications

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“…In the case of SiMnOx microjets, MnO2 can act as a dual catalyst for the decomposition of H2O2 to generate O2 bubbles for the motion but also for the degradation of organic pollutants via Fenton-like reaction. 35,57,58 However, as shown in Figure 5A and 5B, the resulting performance is much slower than the one obtained with the FeSiMnOx microjets. (Figures 5A and 5B), the removal yield was much lower than FeSiMnOx microjets under visible light irradiation.…”

Section: Resultsmentioning

confidence: 85%

“…[59][60][61] Given the high oxidation potential of these radicals, 62 they can perform the total degradation of the organic matter (pollutants) to non-harmful molecules (CO2 and water). At the same time, MnO2 can also produce additional HO • radicals through the Fenton-like reaction in the presence of H2O2, 57,[63][64][65][66] resulting in an enhancement of the total oxidation of the organic pollutants.…”

Section: Resultsmentioning

confidence: 99%

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Metal-Oxide-Based Microjets for the Simultaneous Removal of Organic Pollutants and Heavy Metals

Villa

Parmar

Vilela

et al. 2018

ACS Appl. Mater. Interfaces

110

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Water contamination from industrial and anthropogenic activities is nowadays a major issue in many countries worldwide. To address this problem, efficient water treatment technologies are required. Recent efforts have focused on the development of self-propelled micromotors that provide enhanced micromixing and mass transfer by the transportation of reactive species, resulting in higher decontamination rates. However, a real application of these micromotors is still limited due to the high cost associated to their fabrication process. Here, we present FeO-decorated SiO/MnO microjets for the simultaneous removal of industrial organic pollutants and heavy metals present in wastewater. These microjets were synthesized by low-cost and scalable methods. They exhibit an average speed of 485 ± 32 μm s (∼28 body length per s) at 7% HO, which is the highest reported for MnO-based tubular micromotors. Furthermore, the photocatalytic and adsorbent properties of the microjets enable the efficient degradation of organic pollutants, such as tetracycline and rhodamine B under visible light irradiation, as well as the removal of heavy metal ions, such as Cd and Pb.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Metal-Oxide-Based Microjets for the Simultaneous Removal of Organic Pollutants and Heavy Metals

Villa

Parmar

Vilela

et al. 2018

ACS Appl. Mater. Interfaces

110

View full text Add to dashboard Cite

show abstract

“…Application of manganese oxide removed approximately 78% of bisphenol A within 168 h (Wang et al, 2017). Moreover, manganese oxide was used as act a catalyst in a Fenton-like reaction to completely degrade methylene blue in a short duration of 20 min (Kim et al, 2017). In addition, the co-synthesized Fe 3 O 4 -MnO 2 nano-complex removed up to 96.8% of acid orange 7.…”

Section: Discussionmentioning

confidence: 99%

“…It was found to be capable of oxidizing a wide range of recalcitrant compounds, including compounds with phenolic and fluoroquinolonic moieties and some antibacterial compounds (Wu et al, 2017). Manganese oxide has gained attention as a technologically important compound for degradation of toxins in the laboratory and in the field (Kim et al, 2012;Birkner et al, 2013;Robinson et al, 2013;Furgal et al, 2015;Kim et al, 2017). However, Mn oxides are prepared via chemical methods which require high energy and chemical reagents to convert the metal ions into precipitates (Fu et al, 2010;Shaker and Abdalsalm, 2018;Tian et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Paraquat Degradation by Biological Manganese Oxide (BioMnOx) Catalyst Generated From Living Microalga Pediastrum duplex AARL G060

Thongpitak

Pumas

2020

Front. Microbiol.

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Paraquat is a non-selective fast-acting herbicide used to control weeds in agricultural crops. Many years of extensive use has caused environmental pollution and food toxicity. This agrochemical degrades slowly in nature, adsorbs onto clay lattices, and may require environmental remediation. Studies have shown that biosynthesized manganese oxide (BioMnO x) successfully degraded toxic synthetic compounds such as bis-phenol A and diclofenac, thus it has potential for paraquat degradation. In this experiment, P. duplex AARL G060 generated low (9.03 mg/L) and high (42.41 mg/L) concentrations of BioMnO x. The precipitated BioMnO x was observed by scanning electron microscopy (SEM), and the elemental composition was identified as Mn and O by energy-dispersive x-ray spectroscopy (EDS). The potential for BioMnO x to act as a catalyst in the degradation of paraquat was evaluated under three treatments: (1) a negative control (deionized water), (2) living alga with low BioMnO x plus hydrogen peroxide, and (3) living alga with high BioMnO x plus hydrogen peroxide. The results indicate that BioMnO x served as a catalyst in the Fenton-like reaction that could degrade more than 50% of the paraquat within 72 h. A kinetic study indicated that paraquat degradation by Fenton-like reactions using BioMnO x as a catalyst can be described by pseudo-first and pseudosecond order models. The pH level of the BioMnO x catalyst was neutral at the end of the experiment. In conclusion, BioMnO x is a viable and environmentally friendly catalyst to accelerate degradation of paraquat and other toxic chemicals.

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“…[13][14][15] Alternatively, other transition metal oxides, such as CeO 2 , CuO and MnO 2 , have also been reported as active materials for Fenton-like oxidation treatments. [16][17][18] Among them, MnO 2 (a non-toxic and cheap material) has not been extensively studied for the oxidation reaction of organic pollutants, despite being an efficient catalyst for the decomposition of H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

Core–shell microspheres for the ultrafast degradation of estrogen hormone at neutral pH

et al. 2018

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Manganese oxide nanorods as a robust Fenton-like catalyst at neutral pH: Crystal phase-dependent behavior

Cited by 79 publications

References 49 publications

Metal-Oxide-Based Microjets for the Simultaneous Removal of Organic Pollutants and Heavy Metals

Metal-Oxide-Based Microjets for the Simultaneous Removal of Organic Pollutants and Heavy Metals

Paraquat Degradation by Biological Manganese Oxide (BioMnOx) Catalyst Generated From Living Microalga Pediastrum duplex AARL G060

Core–shell microspheres for the ultrafast degradation of estrogen hormone at neutral pH

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