Facile surface modification of immobilized rutile nanoparticles by non-thermal glow discharge plasma: Effect of treatment gases on photocatalytic process

Zolfaghari, Pezhman; Khaledian, Hamid Reza; Aliasgharlou, Nasrin; Khorram, Sirous; Karimi, Afzal; Khataee, Alireza

doi:10.1016/j.apsusc.2019.06.077

Cited by 32 publications

(10 citation statements)

References 68 publications

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“…30−32 Mechanical properties are important parameters for assessing the quality of packaging materials. 33 A biodegradable film must possess certain mechanical strength and extensibility to maintain its integrity and barrier ability during shipping or handing. 34 Consequently, it is critical to explore the effect of CMCS contents on the mechanical properties of cellulose films.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Robust Cellulose/Carboxymethyl Chitosan Composite Films with High Transparency and Antibacterial Ability for Fresh Fruit Preservation

Liao

Wang

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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The packaging of fresh foods is increasingly focusing on biodegradable composites made from natural resources. Environmental worries about traditional plastics can be reduced by developing robust, eco-friendly biocomposites. Here, carboxymethyl chitosan (CMCS) was co-solubilized with cellulose to successfully fabricate highly transparent, sturdy composite films (CSCs). All composite films exhibited better thermal stability, high transparency, and robust mechanical strength due to physical cross-linking and hydrogen bonds between homogeneously dispersed CMCS and cellulose molecules. Particularly, compared to CSC-0, the tensile strength and elongation at break of CSC-3 were increased by 68.8 and 23.2%, respectively. Additionally, CSCs showed excellent barrier capacity and good antibacterial ability for suitable food packaging materials. These CSCs with excellent properties can be used to package fruit to reduce water loss from the fruit and increase its shelf life.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Robust Cellulose/Carboxymethyl Chitosan Composite Films with High Transparency and Antibacterial Ability for Fresh Fruit Preservation

Liao

Wang

Huang

et al. 2023

ACS Sustainable Chem. Eng.

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“…Changes in morphology and grain shape indicate that plasma treatment is a very useful technique in surface modifications. These changes in surface morphology correspond to the plasma etching effect [ 37 ]. A noticeable transformation in shape and size was reported, which are influential factors for determining the magnetic and dielectric features of spinel ferrite [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Magnetic and Dielectric Properties of Ni0.25Cu0.25Zn0.50Fe2O4 Magnetic Nanoparticles through Non-Thermal Microwave Plasma Treatment for High-Frequency and Energy Storage Applications

et al. 2022

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Spinel ferrites are widely investigated for their widespread applications in high-frequency and energy storage devices. This work focuses on enhancing the magnetic and dielectric properties of Ni0.25Cu0.25Zn0.50 ferrite series through non-thermal microwave plasma exposure under low-pressure conditions. A series of Ni0.25Cu0.25Zn0.50 ferrites was produced using a facile sol–gel auto-ignition approach. The post-synthesis plasma treatment was given in a low-pressure chamber by sustaining oxygen plasma with a microwave source. The structural formation of control and plasma-modified ferrites was investigated through X-ray diffraction analysis, which confirmed the formation of the fcc cubical structure of all samples. The plasma treatment did not affect crystallize size but significantly altered the surface porosity. The surface porosity increased after plasma treatment and average crystallite size was measured as about ~49.13 nm. Morphological studies confirmed changes in surface morphology and reduction in particle size on plasma exposure. The saturation magnetization of plasma-exposed ferrites was roughly 65% higher than the control. The saturation magnetization, remnant magnetization, and coercivity of plasma-exposed ferrites were calculated as 74.46 emu/g, 26.35 emu/g, and 1040 Oe, respectively. Dielectric characteristics revealed a better response of plasma-exposed ferrites to electromagnetic waves than control. These findings suggest that the plasma-exposed ferrites are good candidates for constructing high-frequency devices.

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“…Zhang et al demonstrated that the photocurrent density, incident photocurrent efficiency, and stability of the samples treated with air plasma were significantly improved, which were still about 3–4 times higher than those of the original TiO 2 nanotubes even after 6 months. It was demonstrated that surface hydroxyl groups created oxygen vacancies by air plasma just as H 2 and O 2 plasmas did, ,,, which is difficult to be explained as the composition of air is complex. In addition, reactive oxygen species were grafted on the surface of a Fe/Co bimetallic cyanide framework through air NTP without destroying the framework structure, which enhanced the reactivity of catalysts (Figure c) .…”

Section: Recent Advances In Modifying the Active Sites Of Photocataly...mentioning

confidence: 99%

“…In addition, O 2 plasma was used to treat the rutile TiO 2 nanoparticles which induced the formation of Ti 3+ and surface oxygen vacancies at the localized gap states. After modification, the transfer of electrons from the valence band to the conduction band was accelerated, and the energy demand for photoexcitation was reduced, 32 with the photocatalytic degradation rate of malachite green by the O 2 plasma modified sample improved by 2.22 times over unmodified photocatalysts.…”

Section: Recent Advances In Modifying the Active Sites Of Photocataly...mentioning

confidence: 99%

Enhancing the Properties of Photocatalysts via Nonthermal Plasma Modification: Recent Advances, Treatment Variables, Mechanisms, and Perspectives

Chen

Song

et al. 2021

Ind. Eng. Chem. Res.

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Surface modification is crucial in improving catalyst activity, since all catalytic reactions occur on the surface of the catalyst. This review discusses the application of nonthermal plasmas (NTP) for surface modification and functionalization of heterogeneous photocatalysts. NTP pretreatment provides an environmentally friendly and effective means for functionalization, surface etching, and/or defect regulation on the surface of photocatalysts. The correlations between modification variables and the properties of catalysts are reviewed in depth. Moreover, insights into the modification mechanisms are reviewed to provide state-of-the-art understanding and suggest that more advanced modification can be achieved. Finally, challenges and perspectives for future studies are provided.

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Facile surface modification of immobilized rutile nanoparticles by non-thermal glow discharge plasma: Effect of treatment gases on photocatalytic process

Cited by 32 publications

References 68 publications

Robust Cellulose/Carboxymethyl Chitosan Composite Films with High Transparency and Antibacterial Ability for Fresh Fruit Preservation

Robust Cellulose/Carboxymethyl Chitosan Composite Films with High Transparency and Antibacterial Ability for Fresh Fruit Preservation

Enhancement of Magnetic and Dielectric Properties of Ni0.25Cu0.25Zn0.50Fe2O4 Magnetic Nanoparticles through Non-Thermal Microwave Plasma Treatment for High-Frequency and Energy Storage Applications

Enhancing the Properties of Photocatalysts via Nonthermal Plasma Modification: Recent Advances, Treatment Variables, Mechanisms, and Perspectives

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