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Simple Synthesis Of Graphitic Carbon Nitride Based Composite For Heavy Metals Removal From Water
Janardhan Reddy Koduru(Koduru Janardhan Reddy),Zahid Husain Momin,Lakshmi Prasanna Lingamdinne,Ganesh Kumar Reddy Angaru,Yoon-Young Chang(장윤영),Jae-Kyu Yang(양재규) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11
( Koduru Janardhan Reddy ),( Lingamdinne ),최유림,최종수,장윤영,양재규 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Graphene oxide (GO) is consisting of various functional groups such as hydroxyl, carboxyl, and epoxy groups. However, gadolinium based nanocomposites have been applied for waste water treatment. In this study, iron impregnated Gadolinium-Graphene Oxide (FeGO-Gd) was synthesized following an oxidation and iron impregnation of Gado-linium- Graphene Oxide(FeGO-Gd). FeGO-Gd were characterized by XPS,XRD,SEM and FTIR spectroscopy. The removal of Arsenic by FeGO-Gd was examined under various experimental conditions. The reaction kinetics was well fitted on pseudo-second order.
Koduru, Janardhan Reddy,Kailasa, Suresh Kumar,Bhamore, Jigna R.,Kim, Ki-Hyun,Dutta, Tanushree,Vellingiri, Kowsalya Elsevier 2018 Advances in colloid and interface science Vol.256 No.-
<P>Silver nanoparticles (Ag NPs) have recently emerged as promising materials in the biomedical sciences because of their antimicrobial activities towards a wide variety of microorganisms. Nanomaterial-based drug delivery systems with antimicrobial activity are critical as they may lead to novel treatments for cutaneous pathogens. In this review, we explore the recent progress on phytochemical-mediated synthesis of Ag NPs for antimicrobial treatment and associated infectious diseases. We discuss the biological activity of Ag NPs including mechanisms, antimicrobial activity, and antifungal/antiviral effects towards various microorganisms. The advent of Ag NP-based nanocarriers and nano-vehicles is also described for treatment of different diseases, along with the mechanisms of microbial inhibition. Overall, this review will provide a rational vision of the main achievements of Ag NPs as nanocarriers for inhibition of various microbial agents (bacteria, fungus, and virus). (C) 2018 Elsevier B.V. All rights reserved.</P>
Koduru, Janardhan Reddy,Chang, Yoon-Young,Kim, Im-Soon Asian Journal of Chemistry 2014 Asian Journal of Chemistry Vol.26 No.1
<P>Biosorption is an ecofriendly wastewater treatment technique with high efficiency and low operating cost involving simple procedure for the removal and recovery of heavy metal ions from aqueous media. In present investigation, Schizandra chinesis fruit peel powder was utilized as biosorbent for the removal of Co(II) from aqueous media. The biosorbent was characterized by using Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray techniques analysis. From FT-IR analysis it was found that hydroxyl, methoxy and carbonyl groups are involved in the removal of Co(II) from aqueous environment. The effect of various parameters for Co(II) removal by using Schizandra chinesis fruit peel powder are evaluated in batch biosorption method. Biosorption kinetics data was evaluated with kinetic models and the kinetic data was well fitted with pseudo-second-order kinetic model. The equilibrium data was in tune with the Langmuir isotherm model by revealing the maximum sorption capacity of 9.47 mg g(-1) at pH 6.5, contact time 40 min. This study demonstrated that the Schizandra chinesis fruit peel powder biosorbent was a promising, efficient, economic and biodegradable sorbent.</P>
Mallikarjuna, Koduru,Bathula, Chinna,Buruga, Kezia,Shrestha, Nabeen K.,Noh, Yong-Young,Kim, Haekyoung Elsevier 2017 Materials letters Vol.205 No.-
<P><B>Abstract</B></P> <P>In this communication, we present the fenugreek tea aided green synthesis of Pd nanoparticles (PdNPs@FT). The synthesized PdNPs were characterized by UV–Visible spectroscopy, scanning electron microscopy (SEM), small area electron diffraction (SAED), fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). FT-IR manifested that polyol and amide groups present in fenugreek may have participated in the synthesis of palladium nanoparticles. PdNPs@FT exhibited high catalytic activity towards hydrogenation of 4-nitrophenol to 4-aminophenol. PdNPs@FT catalyzed Suzuki–Miyaura coupling reaction between bromobenzene and phenyl boronic acid gave desired biphenyl in excellent yield.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Synthesis of PdNPs@FT by the aid of fenugreek tea as green reducing agent is studied. </LI> <LI> Pd NPs@FT are found to be stabilized against agglomeration due to capping with tea extract. </LI> <LI> Pd NPs@FT demonstrating high catalytic activity towards hydrogenation and Suzuki–Miyaura coupling is observed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Structural and dielectric properties of NaIO4 - Complexed PEO/PVP blended solid polymer electrolytes
H.K. Koduru,L. Marino,F. Scarpelli,A.G. Petrov,Y.G. Marinov,G.B. Hadjichristov,M.T. Iliev,N. Scaramuzza 한국물리학회 2017 Current Applied Physics Vol.17 No.11
Poly (ethylene oxide) (PEO)/Polyvinyl pyrrolidone (PVP) blended solid polymer electrolytes complexed with NaIO4 salt at different weight percentage ratios were prepared using solution casting technique. Effect of salt complexation on structural properties of pure blend (PEO/PVP) electrolyte was investigated by X-ray diffraction (XRD), Raman spectroscopy and Scanning electron microscopic (SEM) studies. Modifications in glass transition temperature and thermal stability of the blend electrolytes were measured by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) studies. The determined refractive index values from optical absorption spectra were found to increase with the increase of salt concentration. Impedance measurements were made in the frequency range of 0.1 Hz e1 MHz to explore dielectric response and ion dynamics of the blend electrolytes as a function of NaIO4 salt concentration. The PEO/PVP blend complexed with 10 wt% of NaIO4 salt was demonstrated higher room temperature conductivity of 1.56 107 S/cm. The temperature dependence of DC conductivity of blend electrolytes was followed the Arrhenius behaviour. Determined diffusion coefficients (DNaþ) using Trukhan model and estimated mobility (m) values of sodium ions were increased with increase of salt concentration. To get the further insights into the ion dynamics, the complex dielectric permittivity has been modeled with HavriliakeNegami function.
Jong-Soo Choi(Jong-Soo Choi),Seon-Hwa Lim(Seon-Hwa Lim),Lingamdinne Prasanna Lakshmi(Lingamdinne Prasanna Lakshmi),Se-yeon Park(Se-yeon Park),Janardhan Reddy Koduru(Janardhan Reddy Koduru),Jae-Kyu Yan 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
Industrial wastewater containing Volatile Organic Compounds (VOCs) that are contaminating groundwater or surface water in urban areas. This is not only polluting the water, but also polluting atmosphere by emitted into the atmosphere. The most common treatment method of treating VOCs in aqueous system is adsorption of volatilized VOCs separated from the water by steam stripping using activated carbon. However, the activated carbon's adsorption efficiency is reduced because of the high moisture content of the VOCs generated during the vaporization process. As a result, it is necessary to develop an adsorption medium with high adsorption efficiency and low moisture sensitivity. Polyaniline (PANI) creates a porous 3D structure by polymerizing monomer aniline into randomly entangled rod shapes. When phytic acid is mixed with such polyanline, a structure with a certain structure is formed, and through this, an adsorbent with a large specific surface area can be prepared. The optimal condition was determined through PANI and ACP characterization as well as phenol and VOC adsorption tests in water (Benzene, Toluene, Ethylbenzene, Trichloroethylene (TCE), Tetrachloroethylene (PCE)). Characterization (FE-SEM, HR-TEM, BET, FTIR, XRD) of PANI and ACP were also carried out.
Lanthanum doped-Graphene OxideNanocomposites for Groundwater Remediation
( Lingamdinne ),( Koduru Janardhan Reddy ),최종수,최유림,장윤영,양재규 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Fe<sub>3</sub>O<sub>4</sub>/GO, magnetic reduced GO, Mn<sub>3</sub>O<sub>4</sub>/GO, NiFe<sub>2</sub>O<sub>4</sub>/GO and other hybrid nanocomposites have been used for the adsorption of various organic and inorganic pollutants from water.Lanthanide oxides have similar properties like transition metal(III) oxides and have good chemical durability and low phonon energy. Recently, lanthanum(III) (La(III)) composites was utilized for selective removal of phosphorus and the resultant studies conclude that the La(III) is superior than to Fe(III) or Al(III) in the pH range of 4.5-8.5. Hence, in the present study, prepared hybrid composites (La(III)-GO)were utilized groundwater remediation. Thephysicochemical properties of the prepared compositeswereanalyzed using XRD, XPS, FT-IR and FT-Raman analyses. The surface area and morphology of La-GO were studied using SEM-EDX and BET analysis. The surface composition and morphology studies conclude that the prepared La-GO were a smart hybrid for favorable adsorption of arsenic.