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High Strength Electrospun Nanofiber Mats via CNT Reinforcement: A Review
( Bishweshwar Pant ),( Mira Park ),( Soo-jin Park ),( Hak Yong Kim ) 한국복합재료학회 2016 Composites research Vol.29 No.4
The development of electrospun nanofibers with improved mechanical properties is of great scientific and technological interest because of their wide-range of applications. Reinforcement of carbon nanotubes (CNTs) into the polymer matrix is considered as a promising strategy for substantially enhancing the mechanical properties of resulting CNTs/polymer composite mats on account of extraordinary mechanical properties of CNTs such as ultrahigh Young`s modulus and tensile strengths. This paper summarizes the recent developments on electrospun CNTs/ polymer composite mats with an emphasis on their mechanical properties.
Pant, Bishweshwar,Park, Mira,Kim, Hak-Yong,Park, Soo-Jin Elsevier 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.699 No.-
<P><B>Abstract</B></P> <P>Eggshell membrane (ESM), which locates between the egg white and the inner surface of the eggshell, is generally considered as waste; however, it can be utilized in various fields. In this contribution, we report a stable CdS-TiO<SUB>2</SUB> decorated carbonized egg shell membrane (CESM) composite for effective removal of methylene blue (MB). The ESM was utilized as a template for the coating of CdS/titanium tetraisopropoxide at its fibrous network and subsequently sintered at inert atmosphere to produce CdS-TiO<SUB>2</SUB> decorated carbonized eggshell membrane (CdS-TiO<SUB>2</SUB>/CESM). The presence of CdS-TiO<SUB>2</SUB> NPs on the CESM fibrous network introduces effective adsorptive and photocatalytic properties for the removal of organic pollutants from water. This study suggests a simple approach to control the pollutant in an eco-friendly way by utilizing a waste material.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CdS-/TiO<SUB>2</SUB> NPs decorated carbonized egg shell membrane was successfully prepared. </LI> <LI> It exhibited a strong activity for catalytic removal of organic pollutants. </LI> <LI> It showed dual organic pollutants removing process; adsorption and degradation. </LI> <LI> The introduced photocatalyst can be reused. </LI> <LI> Utilization of a waste material to control pollutants. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Pant, Bishweshwar,Ojha, Gunendra Prasad,Kim, Hak-Yong,Park, Mira,Park, Soo-Jin Elsevier 2019 Environmental pollution Vol.245 No.-
<P><B>Abstract</B></P> <P>Fly ash (FA), a solid waste generated in thermal power plants, is considered an environmental pollutant. Therefore, measures must be taken to dispose of FA in an environmentally friendly manner. In this paper, an electrospinning technique was employed to incorporate FA particles onto zinc oxide nanofibers (ZnO NFs), and the product (FA/ZnO composite) was used for the removal of methylene blue (MB) from the water. Herein, ZnO NFs may serve as effective semiconductor photocatalysts and provide sufficient surface area for FA, while the FA particles serve as an effective adsorbent. The adsorption capacity and photocatalytic efficiency of the as-synthesized nanocomposite fibers were enhanced compared to those of the pristine ZnO NFs, and this result is attributed to the uniform distribution of FA on the surface of the ZnO NFs. The as-synthesized nanocomposite could have great significance in wastewater treatment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> FA incorporated ZnO NFs were prepared by electrospinning technique. </LI> <LI> The ZnO NFs provide an excellent support to the FA particles. </LI> <LI> The FA/ZnO nanocomposite removes organic pollutant by adsorption and photocatalysis. </LI> <LI> It can be reused without the loss of photocatalytic activity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Pant, Bishweshwar,Saud, Prem Singh,Park, Mira,Park, Soo-Jin,Kim, Hak-Yong Elsevier 2016 Journal of alloys and compounds Vol.671 No.-
<P><B>Abstract</B></P> <P>A multifunctional Ag–TiO<SUB>2</SUB>/reduced graphene oxide (rGO) nanocomposite was prepared by a simple one-step hydrothermal reaction using TiO<SUB>2</SUB> NP (Degussa P25), AgNO<SUB>3</SUB>, and graphene oxide (GO) without reducing agents. Growth of the Ag–TiO<SUB>2</SUB> NPs over GO and reduction of GO were simultaneously carried out under hydrothermal condition. This method provides the notable advantages of a single-step reaction without employing toxic solvents or reducing agents, thereby providing a novel green synthetic route to produce the nanocomposite of Ag–TiO<SUB>2</SUB>/rGO. Further, it enhances the optical response of the nanocomposites and contributed for the absorption of light in the visible spectrum through localized surface plasmon resonance effects. The superior photocatalytic activities, antibacterial properties, and the easy recovery make the Ag– TiO<SUB>2</SUB>/rGO nanocomposite a good promising candidate for wastewater treatment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ag–TiO<SUB>2</SUB> decorated graphene was introduced as an effective photocatalyst. </LI> <LI> Single-step reaction without employing toxic solvents or reducing agents. </LI> <LI> The photocatalyst exhibited a strong response to both UV and visible light. </LI> <LI> Reduced charge recombination rate. </LI> <LI> Fast photodegradation and disinfection rate. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Pant, Bishweshwar,Park, Mira,Kim, Hak-Yong,Park, Soo-Jin Elsevier Sequoia 2016 Synthetic metals Vol.220 No.-
<P><B>Abstract</B></P> <P>In this study, a novel photocatalytic and antibacterial Ag-ZnO decorated carbon fiber composite was synthesized by a simple electrospinning method followed by the hydrothermal treatment. Aqueous suspension containing Ag and ZnO precursors with the carbon nanofibers was kept in the hydrothermal process at 140°C for 2h to obtain a homogenous distribution of Ag-ZnO NPs throughout the surface of carbon fibers. The studies of the photocatalytic degradation of methylene blue (MB) and antibacterial performance against Escherichia coli <I>(E. coli)</I> indicated that the as-synthesized composites show enhanced adsorption, visible-light-driven photocatalytic, and antibacterial properties than that of pristine ZnO particles. Therefore, this work provides a facile method of the preparation of carbon fiber based composites which may have potential applications in the environmental fields.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ag-ZnO NPs decorated carbon nanofibers were successfully prepared. </LI> <LI> It exhibited a strong photocatalytic and antibacterial activities. </LI> <LI> It can be considered as a cheap and effective material for wastewater treatment. </LI> </UL> </P>
Pant, Bishweshwar,Pant, Hem Raj,Park, Mira,Liu, Yanan,Choi, Ja-Wun,Barakat, Nasser A.M.,Kim, Hak-Yong Elsevier 2014 CATALYSIS COMMUNICATIONS - Vol.50 No.-
CdS/TiO2 NPs-decorated carbon nanofibers were introduced as a novel photocatalyst working under visible light radiation for the effective hydrolytic dehydrogenation of ammonia borane. Calcination of electrospun nanofiber mats composed of titanium tetraisopropoxide, poly (vinyl pyrrolidone) (PVP), and cadmium acetate dihydrate with a few drops of ammonium sulfide in argon atmosphere at 850 degrees C led to the production of CdS-TiO2 decorated carbon nanofibers. As-synthesized nanocomposite exhibited a strong photocatalytic activity for catalytic hydrolysis of ammonia-borane. The favorable electrons-transfer properties, better dispersion, high surface area, and adsorption property are the main features of nanocomposites that exhibit high catalytic efficiency. (C) 2014 Elsevier B.V. All rights reserved.
Pant, Bishweshwar,Pant, Hem Raj,Barakat, Nasser A.M.,Park, Mira,Jeon, Kyungsoo,Choi, Yuri,Kim, Hak-Yong Elsevier 2013 CERAMICS INTERNATIONAL Vol.39 No.6
<P><B>Abstract</B></P> <P>A novel photocatalytic and antibacterial carbon nanofiber decorated with TiO<SUB>2/</SUB>ZnO composite NPs was prepared by a simple electrospinning method followed by calcination and hydrothermal treatment. The loading of a small amount of ZnO NPs throughout the fibers prior to electrospinning could provide nucleation sites for the crystal growth of ZnO from its precursor during hydrothermal synthesis and could effectively hold TiO<SUB>2</SUB>/ZnO particles on the surface of the fibers for better stability. The morphology and structure of the as-synthesized particles were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy, which revealed that TiO<SUB>2</SUB>/ZnO NPs were attached on the surface of the carbon nanofibers. The as-synthesized nanocomposite exhibited a strong photocatalytic activity for the decomposition of methylene blue (MB) under UV irradiation and showed good antibacterial properties as well. The enhanced photocatalytic performance of the developed nanocomposite can be attributed to the adsorption characteristic of carbon nanofiber and the matched band potentials of TiO<SUB>2</SUB> and ZnO. The perfect recovery of the catalyst after the reaction and its unchanged efficiency for cyclic use showed that it will be an economical and environmentally friendly photocatalyst.</P>