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Microbial reduction of graphene oxide and its application in microbial fuel cells and biophotovoltaics

Frontiers of Materials Science 2023年第2期17卷 45-63页

作者： Jing-Ye Tee Fong-Lee Ng Fiona Seh-Lin Keng g.gnana kumar Siew-Moi Phang Institute of Ocean and Earth Sciences(IOES) Universiti Malaya50603 Kuala LumpurMalaysia Institute for Advanced Studies Universiti Malaya50603 Kuala LumpurMalaysia Department of Physical Chemistry School of ChemistryMadurai Kamaraj UniversityMadurai 625021Tamil NaduIndia Faculty of Applied Sciences UCSI University56000 Kuala LumpurMalaysia

Despite more than a decade of study,there are still significant obstacles to overcome before graphene can be successfully produced on a large scale for commercial *** oxidation of graphite to produce graphene oxide(gO),followed by a subsequent reduction process to synthesize reduced graphene oxide(rgO),is considered the most practical method for mass ***,which are abundant in nature and inexpensive,are one of the potential green reductants for rgO ***,there is no recent review discussing the reported microbial reduction of gO in *** address this,we present a comprehensive review on the reduction of gO by a range of microorganisms and compared their efficacies and reaction ***,presented were the mechanisms by which microorganisms reduce *** also reviewed the recent advancements in using microbially reduced gO as the anode and cathode material in the microbial fuel cell(MFC)and algal biophotovoltaics(BPV),as well as the challenges and future directions in microbial fuel cell research.

关键词： reduced graphene oxide microbial reduction microbial fuel cell algal biophotovoltaics green chemistry

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Poly(m-phenylene isophthalamide)-reinforced polyethylene oxide composite electrolyte with high mechanical strength and thermostability for all-solid-state lithium metal batteries

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Rare Metals 2022年第11期41卷 3762-3773页

作者： Ya-Ning Liu Zhen Xiao Wen-Kui Zhang Jun Zhang Hui Huang Yong-Ping gan Xin-Ping He g.gnana kumar Yang Xia College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou310014China Institute of Optoelectronic Materials and Devices China Jiliang UniversityHangzhou310018China Department of Physical Chemistry School of ChemistryMadurai Kamaraj UniversityMadurai625021India

Polyethylene oxide(PEO)-based solid polymer electrolytes(SPEs)with flexibility,easy processability,low cost and especially strong ability to dissolve lithium salts have been regarded as promising alternatives to traditional flammable liquid electrolytes in next-generation highsafety and high-energy-density lithium metal ***,the inferior mechanical strength and thermostability of PEO-based SPEs will raise the lithium dendritic penetration issue,further leading to the short circuit in *** this work,aiming at enhancing the interfacial stability against Li dendrites of PEO-based SPEs,poly(mphenylene isophthalamide)(PMIA)is introduced as a reinforcing phase for the rational design of PEO/PMIA composite ***,PMIA chain with meta-type benzene-amide linkages significantly improves the mechanical strength(1.60 MPa),thermal stability(260℃)and ability to inhibit the growth of lithium dendrites(>300 h at 0.1 mA·cm^(-2))of ***,allsolid-state LiFePO_(4)‖PEO/PMlA‖Li cell demonstrates superior electrochemical performance in terms of high specific capacity(159.1 mAh·g^(-1)),remarkable capacity retention(82.2%after 200 cycles at 0.5 C)and excellent safety *** burning or explosion occurs under pressing,bending and cutting *** work opens a new door in developing high-performance PEObased electrolytes for advanced all-solid-state lithium metal batteries.

关键词： Poly(m-phenylene isophthalamide) Polyethylene oxide Solid electrolyte Mechanical strength Thermal stability All-solid-state lithium metal battery

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Effect of Deliberate Ingestion of Organophosphate Pesticide on Distortion Product Oto-Acoustic Emissions (DPOAE)

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International Journal of Clinical Medicine 2012年第6期3卷 508-512页

作者： Srihimaja Nandamudi Vinaya Ashok Murthy Yugandhar Ramakrishna Tejaswini Boreddy Savalam Bujjetha Rathna kumar Savalam gnana Rathna Prakash Ali Yavar Jung National Institute for the Hearing Handicapped Southern Regional Centre Ministry of Social Justice and Empowerment Government of India Manovikasnagar Secunderabad Institute of Health Sciences (IHS) Bhubaneshwar India People’s Education Society Institute of Medical Sciences and Research Centre Kuppam Chittoor India

Background: Oto-Acoustic Emissions (OAE) are low intensity sounds produced by the cochlea in response to an acoustic stimulus. Deliberate self-poisoning has become an increasingly common response to emotional distress in young adults (NHS, 1998). Organophosphate (OP) compounds are most commonly involved in 76% of pesticide poisoning especially in the developing countries like India. Several pesticides are neurotoxin which could potentially affect hearing and, animal studies showed that OP treatment leads to change in hearing threshold, outer and inner hair cell loss but human studies on the same are very few. Aim: The present study was aimed at exploring the cochlear changes after self-poisoning with OP pesticides by measuring the Distortion Product Oto-Acoustic Emissions (DPOAE). Method: 114 subjects were participated in the study, with an age range of 18-30 years having pure tone audiometric thresholds within the normal limits and no history of middle ear pathology. They were further divided into two groups, I and II which includes self-poisoned and healthy subjects respectively. Results: The “pass” and “fail” criteria of DPOAE measures in group I were 30% and 70% respectively whereas in group II, it was found 91% and 9% respectively. Discussion: There was a significant failure in DPOAE in group I (subjects who were self-poisoned) compared to group II (healthy subjects). The two important pathologies behind OP toxicity are the generation of Reactive Oxygen Species and the depletion of NADPH which is necessary for normal function. Conclusion: The results of the present study highlight that;the minute cochlear changes caused due to pesticide poisoning can be effectively measured through DPOAE. Further it can suggest in other clinical targets like Ototoxicity, Noise-induced hearing loss, Meniere’s disease etc., which has an effect on cochlear hair cells can be monitored through DPOAE.

关键词： Oto-Acoustic Emissions (OAE) Organophosphate (OP) Ototoxity Cochlear Changes

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