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Rupa, Esrat Jahan,Anandapadmanaban, Gokulanathan,Mathiyalagan, Ramya,Yang, Deok-Chun Elsevier 2018 Optik Vol.172 No.-
<P><B>Abstract</B></P> <P>This study disclosed the aqueous immature fruits extract of <I>Rubus coreanus</I> act as a reducing and capping precursor for co-precipitation method in the synthesis <I>Rubus coreanus</I> zinc oxide nanoparticle (<I>Rc</I>-ZnO NPs). The development of <I>Rc</I>-ZnO was assured by white precipitated powder and analyzed by spectroscopic and analytical instruments. The UV–vis (UV–vis) studies indicate the maximum absorbance at 357 nm which confirmed the formation of ZnO NPs. Field emission transmission electron microscopy (FE-TEM), Fourier Transform Infrared (FTIR) and dynamic light scattering (DLS) showed the purity, functional group and monodispersity of ZnO NPs). The NPs is 23.16 nm in size, crystalline in nature and possess hexagonal wurtzite structure and all this property were revealed by x-ray powder diffraction (XRD). The <I>Rc</I>-ZnO NPs were subjected for catalytic studies. The Malachite Green dye was degraded by <I>Rc</I>- ZnO NPs in both dark and light (indoor light) conditions and it degraded about 90% at 4 h’ observation in both cases. The biodegradable, low cost <I>Rc</I>-ZnO NPs can be a better weapon for waste water treatment at day and night time for the safety of environment.</P>
음나무 뿌리를 이용한 산화 아연 나노파티클 생합성 및 메틸렌 블루의 분해를 위한 광촉매 활성
Indra Batjikh,Esrat Jahan Rupa,Veronika Soshnikova,Gokulanatha Anandapadmanaban,김연주,Yaxi Han,Hashmoonah Ali,양덕춘 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10
Background : For the green approach of nanoparticles synthesizing, plant based technology has been considered as cost-effective and eco-friendly mass production. The oriental medicinal crop, Kalopanax septemlobus (Thunb.) Koidz. (Korean name: 음나무), the deciduous tree and a family of Araliaceae. Endemic tree of Asian countries, K. septemlobus being used for the treatment of various diseases. Phytochemicals of K. septemlobus such as polyphenols has highly probability of reducing agent for biosynthesizing nanoparticles. Methods and Results : In this study, we applied K. septemlobus ZnO nanoparticles (Ks-ZnO NPs) with procedures including green approach one-pot synthesis. For the characterization of nanoparticles, UV–Vis, FTIR, XRD, SEM and TEM were used. The formation of ZnO nanoparticles, the aurface plasmon resonance were observed at 372 ㎚ in UV-Vis spectroscopy. The presence of functional groups which as a capping agent and formation of ZnO nanoparticles were confirmed in FTIR result. The crystallization and morphology showed by XRD, TEM and SEM respectively. The photocatalytic activity of ZnO nanoparticles, was determined using Methylene blue (MB) dye degradation under UV irradiation (365 ㎚) which resulted rate constant is (−k) 0.1215 with 97.5% of degradation in 30 min. Conclusion : The result shows that phytochemicals in K. septemlobus extract have a potential as a reducing agent to form ZnO nanoparticles. The ZnO NPs are capable to degrade MB with in brief time.
Li, Jin Feng,Rupa, Esrat Jahan,Hurh, Joon,Huo, Yue,Chen, Ling,Han, Yaxi,Ahn, Jong chan,Park, Jin Kyu,Lee, Hyun A.,Mathiyalagan, Ramya,Yang, Deok-Chun Elsevier 2019 Optik Vol.183 No.-
<P><B>Abstract</B></P> <P>Zinc Oxide nanoparticles were synthesized via co precipitation methods from <I>Cordyceps militaris</I> fungus. In this method zinc nitrate hex- hydrate were used as a precursor. The Synthesized nanoparticles were characterized through different analytical method for identification of morphology, size, crystallinity and also purity. The nanoparticles gave highest peak at 350 in Uv–vis spectroscopy which confirmed the formation of <I>Cordyceps</I> zinc oxide nanoparticles. The Field emission transmission electron microscopy (FE-TEM) analyzed the morphology, purity and elemental distribution of the nanoparticles. The X-ray powder diffraction (XRD) study explored the size is about 10.15 nm. Finally, the functional group of plant and nanoparticles were identified using FT-IR analyzer. The <I>Cordyceps militaris</I> zinc oxide nanoparticles have ability to degrade hazardous dye Methylene blue about 97% in the presence of Uv-radiation. So this study emphasizes that the <I>Cordyceps militaris</I> zinc oxide nanoparticles can be the best photo catalyst for the safety of our environment from dangerous water pollution.</P>
O, Kyeong Hee,Rupa, Esrat Jahan,Anandapadmanaban, G.,Chokkalingam, M.,Li, Jin Feng,Markus, J.,Soshnikova, V.,Perez, Z.E.J.,Yang, Deok-Chun WISSENSCHAFTLICHE VERLAGSGESELLSCHAFT MBH 2019 OPTIK -STUTTGART- Vol.181 No.-
<P><B>Abstract</B></P> <P>Zinc Oxide Nanoparticles were synthesized from <I>Hippophae rhamnoides</I> leaves extract via co precipitation method. Synthesized nanoparticles from leaves extract having ability to generate electron–hole (ē–h<SUP>+</SUP>) between the band gap of ZnO due to works as a photo catalyst in degradation of (Eosin Y, Malachite Green) textile dye. The photo catalysts were characterized with the UV–vis spectrometer, Field emission transmission electron microscopy (FE-TEM) Fourier Transform Infrared (FTIR), X-ray powder diffraction (XRD), dynamic light scattering (DLS) analysis. The UV analysis confirmed the formation of ZnO nanoparticles at 374 nm. The FE-TEM images indicates that it's having flower like shape. The XRD data confirmed the size and it is about 20.17 nm. The photocatalytic activity of the Synthesized NPs was evaluated using the Eosin Y and Malachite Green dye under Uv irradiation. Our study found that it has ability to degrade dye about 95%& 89% respectively. So <I>Hippophae rhamnoides</I> Leaves Zinc oxide nanoparticles (<I>Hr</I>-L-ZnO –NPs) can be a better photo catalyst for the treatment of polluted water through textile industry.</P>
판오스 추출물을 이용한 산화 아연 나노파티클의 생합성과 산업용 염료 분해 촉매 활성 및 항균 효과
Lalitha Kaliraj,Gokulanathan Anandapadmanaban,Ramya Mathiyalagan,Esrat Jahan Rupa,Veronika Soshinikova,안종찬,양동욱,Zuly Elizabeth Jimenez Perez,Josua Markus,양덕춘 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10
Background : Panos extract is a mixture of four Panax plant extracts namely Dendropanax morbifera, Panax ginseng, Acanthopanax senticosus and Kalopanax septemlobus. We intended to use Panos extract for ZnO nanoparticles(NPs) synthesis and application for waste water treatment. Methods and Results : In the present study, we have synthesized Panos ZnO nanoparticles via co precipitation method. Characterization of the NPs has been done using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR) and UV-Visible spectroscopy. An average of 75% efficacy in degrading the methylene blue dye has been observed. The nanoparticles showed antibacterial activity against E. coli and S. aureus. Conclusion : The results shows that Panos ZnO NPs can be a potential eco-friendly and economical tool for waste water management in the current scenario where there an intense urge to remediate the polluted environment through novel approaches such as Nanobiotechnology.
Kaliraj, Lalitha,Ahn, Jong Chan,Rupa, Esrat Jahan,Abid, Suleman,Lu, Jing,Yang, Deok Chun Elsevier Sequoia 2019 Journal of photochemistry and photobiology Biology Vol.199 No.-
<P><B>Abstract</B></P> <P>Green synthesis of zinc oxide has gained extensive attention as a reliable, sustainable, and eco-friendly protocol to reduce the destructive effects associated with the traditional synthesis methods commonly utilized in laboratory and industry. Here for the first time, we have synthesized quaker ladies flower type ZnO (ZnO/QNF) from panos extract (extract from four panax plants such as <I>Panax ginseng</I>, <I>Acanthopanax senticosus</I>, <I>Kalopanax septemlobus</I> and Dendropanax morbifera). The synthesized ZnO materials was characterized using powder X-ray diffraction, Fourier infrared spectroscopy, X-ray photoelectron spectroscopy and Transmission electron microscope. The newly synthesized ZnO/QNF was applied for the removal of industrial dyes such as methylene blue (MB), Eosin Y (EY) and Malachite green (MG) under UV illumination. The photocatalyst degraded the 15 mg L<SUP>−1</SUP> MB, EY and MG to >99% within 80, 90 and 110 min of contact time, respectively. In addition, the ZnO/QNF photocatalyst removed the low concentrated 5 mg L<SUP>−1</SUP> of MB, EY, and MG within 30, 35 and 40 min of contact time, respectively. The pedal structure provided all the active sites available for the easy interaction with dye molecule under UV, and that enabled fast kinetics of dye degradation than the many other benchmark materials reported previously. The ZnO photocatalyst could be reused minimum of five cycles without any significant loss in degradation efficiency.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Panos extract mediated quaker ladies type ZnO nano flower (ZnO/QNF) was synthesized. </LI> <LI> ZnO/QNF was characterized using various analytical techniques. </LI> <LI> ZnO/QNF was applied as photocatalyst for industrial dye degradation under UV. </LI> <LI> ZnO/QNF was reused at least five times without much lose in degradation efficiency. </LI> </UL> </P> <P><B>Graphical Abstract</B></P> <P>[DISPLAY OMISSION]</P>