Plasma Deposition and Characterization of Copper-doped Cobalt Oxide Nanocatalysts

Tyczkowski, J.; Kapica, Ryszard; Redzynia, Wiktor; Kozanecki, Marcin; Chehimi, Mohamed M.; Sielski, Jan; Kuberski, Sławomir

doi:10.5755/j01.ms.19.3.2320

Cited by 3 publications

(2 citation statements)

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“…Besides, the weak peak at 845 cm –1 is due to the vibration of Co–N . In the Raman spectra, the peaks at 480, 520, 618, and 685 cm –1 correspond to the existence of Co 3 O 4 and the weak peak at 626 cm –1 can be attributed to the peak of copper oxide, as shown in Figure B . The diffraction peaks of ZIF-67/Cu 0.76 Co 2.24 O 4 NSs are in good agreement with the standard patterns of JCPDS no.…”

Section: Resultssupporting

confidence: 78%

“…25 In the Raman spectra, the peaks at 480, 520, 618, and 685 cm −1 correspond to the existence of Co 3 O 4 40 and the weak peak at 626 cm −1 can be attributed to the peak of copper oxide, as shown in Figure 2B. 41 The diffraction peaks of ZIF-67/Cu 0.76 Co 2.24 O 4 NSs are in good agreement with the standard patterns of JCPDS no. 36-1189 in the XRD pattern and the simulated diffraction peaks of ZIF-67 in Figure 3A.…”

Section: Introductionsupporting

confidence: 70%

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ZIF-67 as a Template Generating and Tuning “Raisin Pudding”-Type Nanozymes with Multiple Enzyme-like Activities: Toward Online Electrochemical Detection of 3,4-Dihydroxyphenylacetic Acid in Living Brains

Liu

Zhang

Peng

et al. 2020

ACS Appl. Mater. Interfaces

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Due to its unique structure and high porosity, metal–organic frameworks (MOFs) can act not only as nanozyme materials but also as carriers to encapsulate natural enzymes and thus have received extensive attention in recent years. However, a few research studies have been conducted to investigate MOF as a template to generate and tune nanozymes in the structure and performance. In this work, the “raisin pudding”-type ZIF-67/Cu0.76Co2.24O4 nanospheres (ZIF-67/Cu0.76Co2.24O4 NSs) were obtained by rationally regulating the weight ratio of ZIF-67 and Cu(NO3)2 in the synthesis process. Here, ZIF-67 not only acts as a template but also provides a cobalt source for the synthesis of cobalt copper oxide on the surface of ZIF-67/Cu0.76Co2.24O4 NSs with multiple enzyme-like activities. The ZIF-67/Cu0.76Co2.24O4 NSs can mimic four kinds of enzymes with peroxidase-like, glutathione peroxidase-like, superoxide dismutase-like, and laccase-like activities. Based on its laccase-like activity, an online electrochemical system for continuous monitoring of 3,4-dihydroxyphenylacetic acid with good linearity in the range of 0.5–20 μM and a detection limit of 0.15 μM was established. Furthermore, the alteration of DOPAC in the brain microdialysate before and after ischemia of the rats’ brain was also successfully recorded. This work not only raises a new idea for the synthesis of nanozyme materials with multiple enzyme activities but also provides a new solution for the detection of neurotransmitters in living brains.

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Section: Resultssupporting

confidence: 78%

Section: Introductionsupporting

confidence: 70%

ZIF-67 as a Template Generating and Tuning “Raisin Pudding”-Type Nanozymes with Multiple Enzyme-like Activities: Toward Online Electrochemical Detection of 3,4-Dihydroxyphenylacetic Acid in Living Brains

Liu

Zhang

Peng

et al. 2020

ACS Appl. Mater. Interfaces

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Cobalt oxide-based catalysts deposited by cold plasma for proton exchange membrane fuel cells

et al. 2015

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Cold Plasma Produced Catalytic Materials

Tyczkowski¹

2016

Plasma Science and Technology - Progress in Physical States and Chemical Reactions

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The cold plasma techniques are widely applied to create new materials possessing unique properties, which cannot be prepared by any other methods. "mong the many interesting substances produced with the participation of cold plasma, a special place is occupied by materials with catalytic properties. The chapter gives a brief review of various cold plasma methods used for the preparation of catalytic materials from the plasma modification of conventional catalysts via plasma-enhanced classical synthesis of catalysts to the advanced thin catalytic films fabricated by plasma sputtering processes but primarily by plasma deposition from metalorganic precursors PECVD . Recently, the catalytic films have attracted considerable attention due to the possibility of depositing them as very thin coatings on virtually all supports without any change in their geometry. Such coatings open the way for new reactor designs, so-called structured reactors, designated for various chemical processes. They can also be used as catalytic deposit on the surface of electrodes for fuel cells and photoelectrodes for water splitting processes. Recent developments in this field and further prospects for thin catalytic films are discussed, all the more so because it is one of the main areas of research in our department.Keywords: Catalysts, plasma treatment, PECVD, structured reactors, fuel cells, water splitting . IntroductionFor a long time, plasma techniques have been used in the creation of new materials possessing unique properties, which cannot be fabricated by other methods. " particularly important technique, giving plenty of possibilities, is the plasma deposition of entirely new, advanced materials in the form of solid coatings having unusual molecular structure and sophisticated nanomorphology. The plasma processes can also be used to modify conventional materials through treating them during or after "classical" synthesis, which generally leads to new © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.substances with disparate properties, often more suitable than those of the unmodified materials."mong the many interesting products fabricated by plasma techniques, materials with catalytic properties occupy a special place. There exist a lot of catalytic reactions, for example, combustion of organic volatile compounds, CO methanation, Fischer Tropsch synthesis, water photo-splitting, fuel cell electrode processes, and many others, which challenge chemists all over the world to seek better catalysts or more effective catalyst preparation methods. It seems that the plasma techniques pave the way for novel solutions in this field.In general, plasma techniques used in the preparation of catalysts can be categorized into one of two groups depending on the plasma type thermal equilibrium pl...

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Plasma Deposition and Characterization of Copper-doped Cobalt Oxide Nanocatalysts

Cited by 3 publications

References 40 publications

ZIF-67 as a Template Generating and Tuning “Raisin Pudding”-Type Nanozymes with Multiple Enzyme-like Activities: Toward Online Electrochemical Detection of 3,4-Dihydroxyphenylacetic Acid in Living Brains

ZIF-67 as a Template Generating and Tuning “Raisin Pudding”-Type Nanozymes with Multiple Enzyme-like Activities: Toward Online Electrochemical Detection of 3,4-Dihydroxyphenylacetic Acid in Living Brains

Cobalt oxide-based catalysts deposited by cold plasma for proton exchange membrane fuel cells

Cold Plasma Produced Catalytic Materials

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