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Preparation of cerium and yttrium doped zno nanoparticles and tracking their structural,optical,and photocatalytic performances

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Journal of Rare Earths 2023年第5期41卷 682-688,I0002页

作者： Essia Hannachi Yassine Slimani Muhammad Nawaz R.Sivakumar Zayneb Trabelsi R.Vignesh Sultan Akhtar Munirah A.Almessiere Abdulhadi Baykal Ghulam Yasin Department of Nuclear Medicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Department of Nanomedicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPO.Box 1982Dammam31441Saudi Arabia Department of Physics Alagappa UniversityKaraikudi630003India Faculty of Sciences of Bizerte University of CarthageZarzouna7021Tunisi Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia State Key Laboratory of Chemical Resource Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBejing 100029China Institute for Advanced Study College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Yttrium(Y)and cerium(Ce)co-doped zno nanoparticles(NPs)were synthesized via the simple sol-gel auto-combustion route.The effect of Ce and Y doping on the structure,morphology,optical,Zeta potential,and photocatalytic activities of zno NPs was examined by Fourier transform infrared(FTIR)spectrometer,X-ray diffraction(XRD),transmission electron microscope(TEM),UV-vis spectrophotometer,and Zetasizer instrument.XRD data show that the fabricated samples crystallize into a hexagonal wurtzite structure.The dopants Y and Ce affect the crystal structure of zno NPs.The crystallite size is reduced with the co-doping effect.TEM results confirm the nano-sized particles of the prepared samples.An increase in optical bandgap values from 3.19 eV for x=0.0 to 3.22,3.24,and 3.25 eV for x=0.01,0.03,and 0.05 samples was confirmed by UV-Vis spectroscopy analysis.Y and Ce co-doped zno nanoparticles show significant alteration of zeta potential and photocatalytic properties compared to undoped zno NPs.Comparatively,undoped zno shows better stability in deionized water as compared to Ce-Y doped zno NPs and exhibits high photocatalytic activity(degradation rate,97.92%)for methyl orange(MO)degradation.

关键词： zno nanoparticles Co-doping Rare earth Structure Bandgap energy Photocatalytic activity

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Green Method, Optical and Structural Characterization of zno nanoparticles Synthesized Using Leaves Extract of M. oleifera

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Journal of Renewable Materials 2022年第3期10卷 833-847页

作者： Jose Vulfrano Gonzalez-Fernandez Diego David Pinzon-Moreno Antony Alexander Neciosup-Puican Maria Veronica Carranza-Oropeza Facultad de Quimica e Ingenieria Quimica Universidad Nacional Mayor de San MarcosLima15081Peru Centro de Investigaciones Tecnologicas Biomedicas y MedioambientalesUniversidad Nacional Mayor de San MarcosLima15081Peru

zno nanoparticles(zno-NP)present innovative optical,electrical,and magnetic properties that depend on spe-cific characteristics,e.g.,size,distribution,and morphology.Thus,these properties are essential to address various applications in areas such as electronics,medicine,energy,and others.In addition,the performance of this zno-NP depends of their preparation which can be done by chemical,physical,and biological methods.Meanwhile,nowadays,the main interest in developing zno-NP synthesis through biological methods bases on the decrease of use of toxic chemicals or energy applied to the procedures,making the process more cost-effective and environ-mentally friendly.However,the large-scale production of nanoparticles by green synthesis remains a big challenge due to the complexity of the biological extracts used in chemical reactions.That being the case,the preparation of zno-NP using Moringa oleifera extract as an alternative biological agent for capping and reduction in synthesis was evaluated in this work.Then,the results based on the analysis of the optical and structural characterization of the zno-NP obtained by employing UV-Vis,DLS,zeta potential,XRD,ATR-FTIR,and FE-SEM indicate mostly the presence of spherical nanosized material with a mean hydrodynamic diameter of 47.2 nm measured by DLS and a mean size diameter of 25 nm observed with FE-SEM technique.Furthermore,in FE-SEM images a homo-geneous dispersion and distribution is observed in the absence of agglutination,agglomeration,or generation of significant lumps of the zno-NP.The XRD analysis showed that heat annealing induced the crystallite size favor-ing their monocrystallinity.Those obtained data confirm the synthesis of zno-NP and the absence of impurities associated with organic compounds in the annealed samples.Finally,those results and low-cost production pre-sent to the synthesized zno-NP by this biological method as a useful material in several applications.

关键词： zno nanoparticles green chemistry Moringa oleifera extract optical characterization structural characterization

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zno nanoparticles as Ethanol Gas Sensors and the Effective Parameters on Their Performance

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Journal of Materials Science & Technology 2013年第5期29卷 393-400页

作者： Asieh Sadat Kazemi Reza Afzalzadeh Mohamadreza Abadyan Bojnourd Branch Islamic Azad UniversityBojnourdIran School of Physics Khajeh Nasir Toosi University of TechnologyTehranIran Shahrekord Branch Islamic Azad UniversityShahrekordIran

zno nanoparticles are synthesized and applied as ethanol gas sensors. In some cases, the sensitivity and response time of these particles are shown to be higher than that has been reported in the literature. It has been investigated that the most possible reason for this higher gas sensing performance can be attributed to the quantity of the activity coefficient of its initial components. However, other effects such as pH and thermal decomposition are of importance as well. Specific ion interaction （SIT） model is applied to derive the mean activity coefficient values of the additives used in synthesis of zno nanoparticles.

关键词： zno nanoparticles Gas sensors Activity coefficient pH Thermal decomposition

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Investigation on UV-curing Reprocessable Thermosets Bearing Hindered Urea Bonds and Their Composites with Modified Zinc Oxide nanoparticles

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Chinese Journal of Polymer Science 2024年第6期42卷 751-765页

作者： Jun-Hao Zhou Li-Ming Tang Key Laboratory of Advanced Materials of Ministry of Education of China Department of Chemical EngineeringTsinghua UniversityBeijing100084China

In this study,a series of hindered urea bond(HUB)containing polyurethane-urea methacrylate prepolymers and a none HUB containing polyurethane methacrylate prepolymer were prepared using isobornyl methacrylate as the reactive diluent via one-pot procedure.The prepolymers were characterized fully by various techniques.Then,their thermosets were fabricated via UV curing in presence of a photo initiator,and their mechanical property and thermal behavior were investigated and compared.Different from the none HUB containing thermoset,the HUB containing thermosets(defined as PUT)could be recycled and reprocessed by hot press under relatively mild conditions with high recovery ratio of mechanical property.Furthermore,zinc oxide(zno)nanoparticles were modified with 3-(trimethoxysilyl)propyl methacrylate and the modified zno(defined as zno-TPM)was dispersed and polymerized into PUT matrix to prepare their nanocomposites.The influence of zno-TPM on the mechanical performance of the composites was evaluated,which indicated that the Young’s modulus and tensile strength increased gradually to the maximum values at zno-TPM content of 1 wt%and then decreased.The composites also displayed good reprocessability with improved recovery ratio compared to the pure PUT sample.In addition,the composite materials exhibited strong UV absorption capacity,implying their potential application in the circumstance where UV-shielding was required.

关键词： Polyurethane-urea methacrylate Hindered urea bond zno nanoparticles Reprocessing UV curing

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Determining the thermophysical properties of Al-doped zno nanoparticles by the photoacoustic technique

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Chinese Physics B 2013年第7期22卷 280-285页

作者： T. A. El-Brolossy O. Saber S. S. Ibrahim Department of Physicsh Faculty of ScienceKing Faisal University Department of Physics Faculty of ScienceAin Shams University Egyptian Petroleum Research Institute Department of Physics Faculty of ScienceCairo University

The thermal conductivity and specific heat capacity of undoped and Al-doped （1–10 at.%） zno nanoparticles prepared using the solvent thermal method are determined by measuring both thermal diffusivity and thermal effusivity of a pressed powder compact of the prepared nanoparticles by using the laser-induced photoacoustic technique. The impact of Al doping versus the microstructure of the samples on such thermal parameters has been investigated. The results reveal an obvious enhancement in the specific heat capacity when decreasing the particle size, while the effect of Al doping on the specific heat capacity is minor. The measured thermal conductivities are about one order of magnitude smaller than that of the bulk zno due to several nested reducing heat transfer mechanisms. The results also show that Al doping significantly influences the thermal resistance. Using a simple thermal impedance model, the added thermal resistance due to Al dopant has been estimated.

关键词： zno nanoparticles microstructure specific heat thermal conductivity

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Fabrication of zno nanoparticles-embedded hydrogenated diamond-like carbon films by electrochemical deposition technique

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Chinese Physics B 2013年第5期22卷 568-571页

作者：张培增李瑞山潘效军谢二庆 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University School of Science Lanzhou University of Science and Technology

zno nanoparticles-embedded hydrogenated diamond-like carbon （zno-DLC） films have been prepared by electro- chemical deposition in ambient conditions. The morphology, composition, and microstructure of the films have been investigated. The results show that the resultant films are hydrogenated diamond-like carbon films embedded with zno nanoparticles in wurtzite structure, and the content and size of the zno nanoparticles increase with increasing deposition voltage, which are confirmed by X-ray photoelectron spectroscopy （XPS）, Raman, and transmission electron microscope （TEM）. Furthermore, a possible mechanism used to describe the growth process of zno-DLC films by electrochemical deposition is also discussed.

关键词： diamond-like carbon zno nanoparticles electrochemical deposition microstructure

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Effect of Fuel to Oxidant Molar Ratio on Structural and DC Electrical Conductivity of zno nanoparticles Prepared by Simple Solution Combustion Method

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Journal of Materials Science & Technology 2013年第10期29卷 898-902页

作者： C.S.Naveen M.L.Dinesha H.S.Jayanna Department of PG Studies and Research in Physics Kuvempu University

zno nanoparticles of different sizes were prepared by varying the molar ratio of glycine and zinc nitrate hexahydrate as fuel and oxidizer （0.1, 0.8, 1.11, 1.3, 1.5, 1.7, 2.0） by simple solution combustion method. UV-Visible spectrophotometry studies show that, the band gap of the prepared zno nanoparticles increases with increasing fuel to oxidant （F/O） molar ratio up to 1.7 revealing the formation of zno nanoparticles. The decrease in band gap for the sample of F/O molar ratio 2.0 is due to an increase in particle size. Powder X-ray diffraction patterns of the prepared samples show the formation of single phase zno nanoparticles and the particle size decreases with increasing F/O molar ratio up to 1.7. Surface morphology of the prepared samples was studied by scanning electron microscopy and it was observed that, the porosity increases with increasing F/O molar ratio. DC electrical conductivity at room temperature and in the temperature range of 303-563 K was studied for all the samples and the results revealed that, the sample of F/O molar ratio 1.7 has low electrical conductivity at room temperature and high EAR （high temperature activation energy） compared to other samples.

关键词： zno nanoparticles Structural characterization Electrical conductivity

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High-frequency properties of oil-phase-synthesized zno nanoparticles

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Chinese Physics B 2015年第2期24卷 441-444页

作者：丁浩峰杨海涛柳丽平任肖宋宁宁沈俊张向群成昭华赵国平 College of Physics and Electronic Engineering Sichuan Normal University Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of Sciences

Monodispersive zno nanoparticles each with a hexagonal wurtzite structure are facilely prepared by the hightemperature organic phase method.The UV-visible absorption peak of zno nanoparticles presents an obvious blue-shift from 385 nm of bulk zno to 369 nm.Both the real part and the image part of the complex permittivity of zno nanoparticles from 0.1 GHz to 10 GHz linearly decrease without obvious resonance peak appearing.The real parts of intrinsic permittivity of zno nanoparticles are about 5.7 and 5.0 at 0.1 GHz and 10 GHz respectively,and show an obvious size-dependent behavior.The dielectric loss angle tangent（tan 5） of zno nanoparticles with a different weight ratio shows a different decreasing law with the increase of frequency.

关键词： zno nanoparticles synthesis high-frequency properties

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Structure and Raman scattering of Mg-doped zno nanoparticles prepared by sol-gel method

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Rare Metals 2018年第10期37卷 881-885页

作者： Zhonglyu Jiang Ke-Rong Zhu Zhong-Qing Lin Shao-Wei Jin Guang Li School of Physics and Materials Science Anhui UniversityHefei 230039 China Modern Experiment Technical Center Anhui University Hefei230039 China

Mg-doped zno （MgxZn1-xO, x=0-0.10） nanoparticles were prepared by sol-gel method. Structural characterization by X-ray diffraction （XRD） indicates that the lattice parameter a increases and c decreases linearly with the increase in Mg content （x） due to the substitution of Mg2＋ for Zn2＋ in zno lattice. The blueshift of Raman modes is observed, impling the increase in force constant of atom vibration in the MgxZn1-xO （Mgzno） nanoparticles. Resonant Raman spectra show longitudinal optical phonon overtones up to fifth order, revealing that the short part of the electron-phonon interaction is enhanced and long-range part is weakened by Mg doping.

关键词： zno nanoparticles Mg doping X-ray diffraction Raman scattering

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Selective Cytotoxic Effect of zno nanoparticles on Glioma Cells

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Nano Research 2009年第11期2卷 882-890页

作者： Stella Ostrovsky Gila Kazimirsky Aharon Gedanken Chaya Brodie Department of Chemistry and Kanbar Laboratory for Nanomaterials at the Bar-Ilan University Center for Advanced Materials and Nanotechnology Bar-Ilan UniversityRamat-Gan 52900Israel The Mina and Everard Goodman Faculty of Life Sciences Bar-Ilan UniversityRamat-Gan 52900Israel

In this study we examined the cytotoxic effect of zno nanoparticles on various human cancer and normal cells.We found that the zno nanoparticles exerted a cytotoxic effect on the human glioma cell lines A172,U87,LNZ308,LN18,and LN229,whereas no cytotoxic effect was observed on normal human astrocytes.Similarly,the zno nanoparticles induced cell death in breast and prostate cancer cell lines while no major effect was observed in the respective normal breast and prostate cell lines.Using the fl uorescent dye 2,7-dichlorofl uorescein diacetate,we found that treatment of the glioma cells with zno nanoparticles induced a large increase in the generation of reactive oxygen species(ROS)and treatment of the cells with N-acetyl cysteine decreased the cytotoxic effect of the zno nanoparticles.In contrast,a smaller effect on ROS generation was observed in the normal astrocytes.These results suggest that zno nanoparticles may be employed as a selective cytotoxic agent for the eradication of cancer cells.

关键词： zno nanoparticles sonochemistry cancer cells

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