Collective use of deep eutectic solvent for one-pot synthesis of ternary Sn/SnO₂@C electrode for supercapacitor

Thorat, Gaurav M.,Jadhav, Harsharaj S.,Chung, Wook-Jin,Seo, Jeong Gil Elsevier 2018 JOURNAL OF ALLOYS AND COMPOUNDS Vol.732 No.-

<P><B>Abstract</B></P> <P>Scalable and simple preparation of metal/metal oxide-carbon composite with high specific surface areas and designated properties are essential for their large scale practical applications. In view of this, we report an ecofriendly deep eutect solvents (DESs) assisted synthesis of Sn/SnO<SUB>2</SUB>@C hybrid composite. Herein, we have investigated the crucial role of DESs which collectively acts as solvent-precursor-reactant system offering an interesting and exciting physicochemical properties and alternative for the conventional solution-based synthesis methods. TEM images reveal that the massive Sn/SnO<SUB>2</SUB> nanoparticles with average size of 15–20 nm, are uniformly confined in highly layered porous carbon sheets leading to the carbonaceous composite with large surface area of 500 m<SUP>2</SUP>/g after thermal treatment. It is noteworthy that the excellent electrochemical performance of Sn/SnO<SUB>2</SUB>@C hybrid composite for supercapacitor electrode material (109.70 mAh/g at 1.42 mA/cm<SUP>2</SUP> and almost 100% capacitance retention for 5000 cycles) can be attributed to the higher surface area and synergic properties of Sn and SnO<SUB>2</SUB>. Nevertheless, the carbon matrix with a low degree of graphitization can establishes a good electrical contact and also prevents the detachment of nanoparticles during the course of long-term electrochemical reactions. In addition, selection of less toxic component is possible by virtue of compositional versatility of DESs. Thus the use of DESs can bring froth the twin benefits of solvent-precursor-reactant system and cost effective eco-friendly synthesis route which can be applicable for the synthesis of various metal/metal oxide-carbon composites.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simple one-pot synthesis of hybrid Sn/SnO<SUB>2</SUB>@C using Deep eutectic solvent (DESs). </LI> <LI> DESs collectively act as solvent-precursor –reactant system. </LI> <LI> The composites exhibit the high surface area value (∼500 m<SUP>2</SUP>/g). </LI> <LI> Almost no capacitance loss up to 5000 cycles at 2 A/g. </LI> <LI> The presence of both Sn & SnO<SUB>2</SUB> is the key for superior electrochemical performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

English in India

Thorat Ashok 한국인도학회 2007 印度硏究 Vol.12 No.2

A ray passing through water changes its direction. It is known as refraction. Similarly, a language passing through an alien culture is bound to change its nature. English in India shows indelible marks of this ‘refraction phenomenon’. The arrival of English in the Indian Sub continent as an alien language, its subsequent acculturation through contact with local languages and cultures and the consequent emergence of local varieties of English present an interesting field of study for sociolinguists. The present paper aims at discussing the different aspects of this process of change. The first part of the paper briefly summarizes the spread, pervasiveness and emergence of varieties of English. It is followed by a detailed discussion of the changing English in India. The focus is on the refraction phenomenon, i.e., rebirth of English as a result of its contact with local languages and cultures. Though the changes occur at different levels like the phonological, lexical, syntactic and semantic, marked examples related to the last three levels are discussed in order to bring into focus the authenticity and legitimacy of ‘Indian English’ as an independent variety.

Bi-functionality of mesostructured MnCo₂O₄ microspheres for supercapacitor and methanol electro-oxidation

Thorat, Gaurav M.,Jadhav, Harsharaj S.,Seo, Jeong Gil Elsevier 2017 CERAMICS INTERNATIONAL Vol.43 No.2

<P><B>Abstract</B></P> <P>In this work, we describe the synthesis of hierarchically mesoporous MnCo<SUB>2</SUB>O<SUB>4</SUB> microspheres via a urea-assisted co-precipitation method, followed by a post-annealing treatment in air. The stoichiometric amount of urea serves as a self-template to favor the self-assembly of hierarchically well-organized, 3D interconnected precursor carbonate microspheres under optimized reaction conditions. An electrode fabricated from micro/nano-structured MnCo<SUB>2</SUB>O<SUB>4</SUB> delivers an excellent multi-functional electrochemical performance when used in supercapacitors and methanol electro-oxidations. The electrode exhibits a high specific capacitance of 1857F/g at a 5mV/s scan rate, and 97% capacitance retention after 5000 cycles. Also, as an electro-catalyst for methanol oxidation, it maintains an optimum current density up to 95A/g. The superior electrochemical performance might be attributed to its three-dimensional interconnected porous architecture, which offers a rapid ion/electron transfer, and structural stability. The synthesis method adopted in the present study is simple, controllable, and easy to carry out at a production scale. Furthermore, the superior electrochemical performance of the as-obtained MnCo<SUB>2</SUB>O<SUB>4</SUB> microspheres renders them a potential candidate for various energy applications.</P>

Rapid Recovery from Link Failures in Software-Defined Networks

Pankaj Thorat,Syed M. Raza,김동수,추현승 한국통신학회 2017 Journal of communications and networks Vol.19 No.6

Carrier-grade networks (CGNs) can leverage the networkprogrammability of software-defined networking (SDN) toensure fast recovery and high availability. However, for the successfuladoption of SDN, the failure recovery requirement must beaddressed. Local detouring is a popular approach for faster recoveryrather than path-based end-to-end recovery. For fast localrecovery, alternate paths must be preinstalled for each individualflow on the link, which in some cases results in storing thousandsof alternate path flow rules. Furthermore, the dependenceon the controller for dynamic per-flow detouring may delay the recovery. In this paper, we propose local immediate (LIm) and immediatecontroller dependent (ICoD) recovery mechanisms to addressthe limitations of OpenFlow-based link recovery approaches. Ourproposed mechanisms considerably reduce the alternate path flowrules by aggregating the disrupted flows using virtual local areanetwork (VLAN) tagging. The proposed algorithms achieve recoverywithin 3 ms and 20 ms, respectively and satisfy the strict 50 msrecovery requirement of CGNs. LIm and ICoD also reduce the alternatepath flow storage requirement by up to 99%. Simulationresults reveal that the flow-aggregation also reduces the effort ofthe controller and minimizes the alternate path installation traffic.

SDN 에서 데이터 평면 장애를 해결하는 빠른 우회 기법

( Pankaj Thorat ),염상길 ( Sanggil Yeom ),주현승 ( Hyunseung Choo ) 한국정보처리학회 2016 한국정보처리학회 학술대회논문집 Vol.23 No.1

Successful deployment of the Software Defined Network (SDN) depends on its ability to cope up with network failures. There are various types of failures that may occur in an SDN. The most common are switch and link failures. It is necessary to recover the network from failures for a continuous service availability. But for the real-time services fast recovery from the failure is required to minimize the service disruption time. In the proposed work, we focused on minimizing the recovery time after the failure is detected. Once the failure is detected, the controller involvement is needed to dynamically reroute the failure disrupted flows from the failed component to an alternate path. The aim of the proposed scheme is to provide a traffic management scheme which can react to the dynamic network events by rapidly modifying the forwarding behavior of the switches for faster in-band network adaptability. The proposed scheme (1) Considers the shared data and control path delay (2) Optimally utilize the network resources (3) Eliminates the need of constant monitoring overhead at the controller which results into faster detouring and ultimately rapid recovery.

Assessing the role of everolimus in reducing hepatocellular carcinoma recurrence after living donor liver transplantation for patients within the UCSF criteria

Ashok Thorat,Long-Bin Jeng,Horng-Ren Yang,Chun-Chieh Yeh,Shih-Chao Hsu,Te-Hung Chen,Kin-Shing Poon 한국간담췌외과학회 2017 Annals of hepato-biliary-pancreatic surgery Vol.21 No.4

Backgrounds/Aims: The protective effect of everolimus (EVR) in hepatocellular carcinoma (HCC) patients who receive liver transplantation in terms of reducing the recurrence has not been sufficiently investigated in clinical trials. In this second stage of our ongoing study, we intend to analyze the effects of EVR as an immunosuppressant, when it is started in the early phase after living donor liver transplantation (LDLT), on HCC recurrence in patients with HCC within the University of California at San Francisco (UCSF) criteria. Methods: From January 2011 to June 2013, a total of 250 patients underwent LDLT for HCC at our institute. The patients with HCC within the UCSF criteria were included in the study and divided in two groups depending upon the postoperative immunosuppression. Group A: HCC patients that received EVR+TAC based immunosuppressive regimen (n=37). Group B: HCC patients that received standard TAC based immunosuppressive regimen without EVR (n=29). The target trough level for EVR was 3 to 5 ng/ml while for TAC it was 8-10 ng/ml. Results: For group A patients, the mean trough level of the EVR was 3.47±1.53 ng/ml (range, 1.5-11.2) with a daily dose of 1.00±0.25 mg/day. For group A and B, the average TAC trough levels were 6.97±3.98 ng/ml (range, 2.50 to 11.28 ng/ml) and 6.93±2.58 (range, 2-16.30), respectively. The 1-year, 3-year and 4-year overall survival achieved for Group A patients was 94.95%, 86.48% and 86.48%, respectively while for Group B patients it was 82.75%,68.96%, and 62.06%, respectively (p=0.0217). Conclusions: EVR use in liver transplant recipients in the early stage after transplantation reduces the HCC recurrence rates in HCC patients within the UCSF criteria.

Mesoporous Mn₂O₃/reduced graphene oxide (rGO) composite with enhanced electrochemical performance for Li-ion battery

Jadhav, Harsharaj S.,Thorat, Gaurav M.,Kale, Bharat B.,Seo, Jeong Gil Royal Society of Chemistry 2017 Dalton Transactions Vol. No.

<▼1><P>Transition metal oxides are the most promising candidates in low-cost and eco-friendly energy storage/conversion applications.</P></▼1><▼2><P>Transition metal oxides are the most promising candidates in low-cost and eco-friendly energy storage/conversion applications. Herein, bare Mn2O3 and a Mn2O3/reduced graphene oxide (rGO) composite have been synthesized by a facile chemical co-precipitation and subsequent annealing procedure. The synthesized Mn2O3/rGO composite exhibits a porous microcube structure formed with several interconnected particles. The porous Mn2O3/rGO composite, with high surface area and increased conductivity, facilited the charge transfer to enhance the overall electrochemical performance when applied as an anode material in Li-ion batteries. The porous Mn2O3/rGO composite exhibits a highly reversible lithium storage capacity of 1015 mA h g<SUP>−1</SUP> at a rate of 0.5 C (230 mA g<SUP>−1</SUP>) during 130 cycles with excellent cycling stability and rate capability. The superior electrochemical performance results mainly due to the combined effect of rGO and Mn2O3, which offers high conductivity, faster Li<SUP>+</SUP> ion transfer, and enhanced structural stability. The material synthesis strategy presented in this study is simple, cost-effective and scalable, which can open new avenues for large-scale applications of composites of graphene and other transition metal oxides.</P></▼2>

Crosslinked Poly(acrylicacid) as a Self-healing Polymer Binder based on Reversible Radical Chemistry for Si anode

장원석,( Gaurav M. Thorat ),김상욱,강유미,김태현 한국공업화학회 2022 한국공업화학회 연구논문 초록집 Vol.2022 No.1

Improved Survival of Cervical Cancer Patients in a Screened Population in Rural India

Jayant, Kasturi,Sankaranarayanan, Rengaswamy,Thorat, Ranjit V,Muwonge, Richard,Hingmire, Sanjay J,Panse, Nandkumar S,Shastri, Surendra S,Malvi, Sylla G,Nene, Bhagwan Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.11

Objectives: To describe the survival experience of cervix cancer patients in a screened rural population in India. Methods: Included 558 cervical cancer patients diagnosed in 2000-2013 in a cohort of 100,258 women invited for screening during 2000-2003. The primary end point was death from cervical cancer. We used the Kaplan-Meier method to estimate cumulative observed survival and Cox proportional hazards regression to assess the effect of patient characteristics on survival after diagnosis. Results: Of the 558 cases included, 143 (26%) and 114 (20%) were diagnosed in stages IA and IB respectively; 252 (45.2%) were dead, and 306 (54.8%) were alive at the last follow-up. The overall 5-year observed survival was 60.5%. The 5-year survival of stage IA patients was 95.1% and 5.3% for stage IV patients. All surgically treated stage IA patients, 94.1% of stage IB patients receiving intracavitary radiotherapy, 62% of stage IIB, 49% of stage III and 25% of stage IV patients receiving radiotherapy survived for 5 years. Conclusion: Higher 5-year survival in our study than elsewhere in India is due to the high proportion of early stage cancers detected by screening combined with adequate treatment, resulting into a favourable prognosis.

Electrochemical growth of Co(OH)2 nanoflakes on Ni foam for methanol electro-oxidation

Roy, A.,Jadhav, H.,Thorat, G.,Seo, J. Royal Society of Chemistry 2017 NEW JOURNAL OF CHEMISTRY Vol.41 No.17