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Uniform and Homogeneous Growth of Copper Nanoparticles on Electrophoretically Deposited Carbon Nanotubes Electrode for Nonenzymatic Glucose Sensor

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Acta Metallurgica Sinica(English Letters) 2016年第10期29卷 889-894页

作者： Syeda Ammara Shahzadi Shamaila Rehana Sharif Sheeba Ghani nosheen zafar Department of Physics University of Engineering and Technology Department of Physics Forman Christian College (A Chartered University)

The multiwalled carbon nanotubes thin-film-based electrode was fabricated by electrophoretic deposition and modified with copper （Cu） nanoparticles to fabricate Cu/CNTs nanocomposite sensor for nonenzymatic glucose detection. The expensive glassy carbon electrode was replaced by fluorine-doped tin oxide glass containing CNTs film to confine the Cu nanoparticles growth by electrodeposition through cyclic voltammetry （CV）. The ultraviolet visible and X-ray diffraction analysis revealed the successful deposition of Cu nanoparticles on the CNTs-modified electrode. The atomic force microscopy images confirrqed the morphology of electrodeposited Cu on CNTs film as uniformly dispersed particles. The electrocatalytic activity of electrode to the glucose oxidation was investigated in alkaline medium by CV and amperometric measurements. The fabricated sensor exhibited a fast response time of less than 5 s and the sensitivity of 314 μA rnM^-1 cm^-2 with linear concentration range （0.02-3.0 mM） having detection limit 10.0 μM. Due to simple preparation of sensor, Cu/CNTs nanocomposite electrodes are a suitable candidate for reliable determination of glucose with good stability.

关键词： Electrophoretic deposition (EPD) Fluorine-doped tin oxide (FTO) substrate Carbon nanotubes Copper nanoparticles Nonenzymatic electrocatalysis Glucose sensor

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Antibacterial Behavior of Laser-Ablated Copper Nanoparticles

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Acta Metallurgica Sinica(English Letters) 2016年第8期29卷 748-754页

作者： hina khalid shamaila shamaila nosheen zafar rehana sharif jawad nazir mohammad rafique sheeba ghani hussain saba Department of Physics University of Engineering and Technology Department of Microbiology University of Veterinary and Animal Sciences

Copper nanoparticles（Cu NPs） have been synthesized by using laser ablation method,using deionized water as main *** formation of Cu NPs is confirmed by UV-visible spectrophotometer（UV-Vis）,atomic force microscopy（AFM） and X-ray diffraction（XRD）.Cu NPs fabricated by laser ablation have diameter in the range from 14 to 55 *** analysis revealed the face-centered cubic（fcc） crystal structure of Cu *** antibacterial activity of Cu NPs has been evaluated in vitro against strains of Escherichia coli（***） and Staphylococcus aureus（***）.The fabricated Cu NPs show considerable antibacterial activity against both bacterial *** bacterial activity of Cu NPs was found to depend on the microbial species.

关键词： Laser-ablated nanoparticles UV-visible spectrophotometer Atomic force microscopy(AFM) Escherichia coli Staphylococcus aureus

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Antibacterial Action of Chemically Synthesized and Laser Generated Silver Nanoparticles against Human Pathogenic Bacteria

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Journal of Materials Science & Technology 2016年第8期32卷 721-728页

作者： nosheen zafar Shahzadi Shamaila Jawad Nazir Rehana Sharif Muhammad Shahid Rafique Jalees Ul-Hasan Syeda Ammara Hina Khalid Department of Physics University of Engineering and Technology Lahore 54890 Pakistan Department of Microbiology University of Veterinary and Animal Sciences Lahore Pakistan Department of Physics Forman Christian College A Charted University Lahore Pakistan

Silver nanoparticles in the range of 10-40 nm were synthesized chemically and by laser ablation, em- ployed for in vitro antibacterial action against human pathogenic bacterium. Their formation was evidenced by UV-visible spectrophotometer; particle size confirmed by atomic force microscopy, crystal structure determined by X-ray diffraction and chemical composition investigated by Fourier transform infrared spec- troscopy. The calculated MIC （minimum inhibitory concentration） of chemically synthesized nanoparticles with 30-40 nm in size are 2.8 μg/mL 4.37 μg/mL 13.5μg/mL and 2.81 p.g/mL for E. coil, S. aureus, B. subtillis and Salmonella, respectively. Whereas laser ablated nanoparticles exhibit MIC of 2.10 μg/mL 2.36 μg/ mL and 2.68 μg/mL for E. coli, S. aureus and Salmonella, respectively.

关键词： Chemically synthesized and laser ablated nanoparticles UV-visible spectrophotometer Gram negative and gram positive bacteria

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N-Doped carbon derived from ZIF-8 coated bimetals(Sn-Mg) as a highly efficient counter electrode electro-catalyst for triiodide reduction

N-Doped carbon derived from ZIF-8 coated bimetals(Sn-Mg) as ...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Chidambaram Brundha nosheen zafar Menglong Sun Asim Arshad Yongwei Zhang 云斯宁西安建筑科技大学材料科学与工程学院功能材料研究所

In 1991,the high efficiency dye-sensitized solar cells(DSSCs) were reported by Brain O’Regan and Michael ***,these devices have been steadily developing around the ***-friendly,Cost-effective,easy fabrication and significant performance inspire researchers to explore the possibility of commercializing *** Materials have been tested to enhance the overall device performance and Metal Organic frameworks(MOFs) are one such material that has been utilized to further evolution the overall device *** this field is only in its beginning,MOF-integrated DSSCs have confirmed the possibility of fabricating devices as efficient as conventional *** this work,a novel nitrogen doped carbon supported tin based bimetallic nanoparticles Sn-Mg@N-C and N-C were synthesized via simple chemical *** X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM) with energy dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS) characterizations of the samples was *** morphological changes were observed changing the pH during the preparation and also given the high yield of the *** conversion efficiency of the DSSCs fabricated with Sn-Mg@N-C CE shows 7.77%,comparable with Pt CE(6.51%).

关键词： Nitrogen doped Carbon Morphological changes High yield Dye-sensitized solar cells

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ZIF-8 derived N-doped carbon with enhanced metal-N active sites:A multi-functional hybrid electrocatalyst for tri-iodide reduction and hydrogen evolution reaction

ZIF-8 derived N-doped carbon with enhanced metal-N active si...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Asim Arshad nosheen zafar Menglong Sun Brundha Chidambaram Yongwei Zhang Lishan Zhang Shuangxi Yuan Xi Wang 云斯宁西安建筑科技大学材料与矿资学院功能材料研究所

To develop an advanced human society in this era smart energy consumption is a major *** this regard,highly economical and renewable energy sources *** energy and hydrogen energy are ideal choices in scientific research *** photovoltaic and electrochemical energy conversion systems,dye-sensitized solar cells(DSSCs) and hydrogen evolution reaction(HER) have some major advantages such as cost effectiveness,easy assembly,higher power conversion efficiency(PCE),low overpotential and nature ***,we have designed a series of electrocatalytic materials by doping manganese(Mn) and Cobalt(Co) alone as a single metal and together(Co/Mn) as bimetal into Ziff-8 based N-doped carbon structures to investigate the synergistic effects after each *** performances were observed after integration of Mn and Co as(Mn@NC and Co@NC) respectively,which were further intensified by bimetal incorporation of Co/Mn together as Co/Mn@*** solar cell devised with low-cost Co/Mn@NC based counter electrode exhibits higher PCE than that of platinum electrode(8.05% vs.6.85%).Additionally,in electrochemical water splitting the catalyst Co/Mn@NC exhibits a small overpotential at a current density of 10 mA cm-2 in 1 M *** work imposes towards a modern perspective to develop a highly efficient hybrid electrocatalyst having a promising approach to perform as multifunctional catalysts in hydrogen evolution reaction,triiodide reduction reaction,and also in advanced clean energy production systems.

关键词： Cobalt/Manganese Zif-8 based N-doped porous carbon Hydrogen evolution Dye-sensitized solar cell Multifunctional electrocatalyst Water splitting

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Incorporated Nb/Co Integrated MOF Derived Nitrogen Doped Carbon as Highly Robust Catalyst for Triiodide Reduction Reaction

Incorporated Nb/Co Integrated MOF Derived Nitrogen Doped Car...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： nosheen zafar Brundha Chidarbaram Yongwei Zhang Asim Arshad Menglong Sun Feng Han Yiming Si Jingwen Li Lishan Zhang Xi Wang 云斯宁西安建筑科技大学材料科学与工程学院功能材料研究所

Development of cost-effective electro catalyst is a key challenge to facilitate the advanced electrochemical energy conversion *** present research,ZIF-8 with Co salt is carbonized at elevated temperature under flowing N2 gas to obtain the 3 D dodecahedrane structure of Co-N-doped ***,Nb/Co-N-C was synthesized from Co-N-C simply by process of ion *** structural morphology is examined by XRD and SEM confirming the successful formation of Co-N-C and Nb/*** power conversion efficiency of Co-N-C(6.95%) and Nb/Co-N-C(7.46%) is comparable to Platinum counter electrode(6.90%).The fabricated counter electrode also exhibited better stability curve after consecutive cyclic voltammetry,as compared to platinum counter *** work provides a new idea for designing of bimetal embedded nitrogen doped carbons nanomaterials with high efficiency for future energy devices.

关键词： Nitrogen doped carbon Transition metals Nano hybrid catalysts Triiodide reduction reaction Active sites

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Recent advancements in bio-based carbon enhanced bimetal oxides as counter electrode catalysts for dye-sensitized solar cells

Recent advancements in bio-based carbon enhanced bimetal oxi...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： nosheen,zafar Asim Arshad Yongwei Zhang Yiming Si Feng Han Chen Wang Ziqi Wang Yangliang Zhang Jingwen Li Xinying Qiao 云斯宁西安建筑科技大学材料科学与工程学院功能材料研究所西安建筑科技大学材料与矿资学院功能材料研究所

Dye-sensitized solar cells(DSSCs) are provoked alternatives to conventional silicon-based solar cells, and they have attained a considerable scientific attention due to their enhanced energy-conversion efficiency, low cost fabrication and chemical stability. In resent researches novel tantalum-based bimetallic oxides(FeTaO, CoTaO, and CuTaO),bio-based spherical carbon(SC) supported composites(FeTaO/SC, CoTaO/SC, and CuTaO/SC) and Tungsten based bimetallic oxides were fabricated by hydrothermal/annealing process as CEs in DSSCs. It was revealed that the FeTaO/SC,CoTaO/SC and CuTaO/SC CEs exhibited excellent electrocatalytic activities and electrochemical stability for I reduction, thus power conversion efficiency(PCE) has been modified upto 6.85%, 6.79%, and 6.53% respectively than that of Pt-CE(6.34%) in DSSCs. While, the DSSC cell with Nickel Tungsten oxide/bio-based carbon(BC) electrode exhibited enhanced PCE of 7.08% far better than that of Pt-CE. The invention of bio-based carbon is a promising strategy for fabricating efficient and controllable BC-enhanced structure of tungsten-bimetal oxides and tantalum based bimetallic oxides. This research will open new era for the use of bio-based carbon enhanced bimetal oxides in renewable energy fields.

关键词： Dye-sensitized solar cell Counter electrode Bio-based carbon Bimetal oxides Catalyst

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