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Feng Dong, Peng Zhang, Kexun Li, Xianhua Liu, Pingping Zhang
In this work, Cu₂O nanoparticles were deposited on a carbon cloth cathode using a facile electrochemical method. The morphology of the modified cathode, which was characterized by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) tests, showed that the porosity and specific surface area of the cathode improved with longer deposition times. X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) results showed that cupric oxide and cuprous oxide coexisted on the carbon cloth, which improved the electrochemical activity of cathode...
December 9, 2016: Nanomaterials
Bernard A Foëx
No abstract text is available yet for this article.
November 2016: Emergency Medicine Journal: EMJ
Tarisai Velempini, Kriveshini Pillay, Xavier Y Mbianda, Omotayo A Arotiba
A new ion-imprinted polymer (IIP) was synthesized from sodium carboxymethyl cellulose and used for the adsorption of hexavalent chromium from aqueous solution. Epichlorohydrin was used to stabilize the polymer before ethylenediamine (EDA) ligand and Cr(VI) were introduced. The obtained IIP was characterized with FTIR, XPS, TGA,(13)C NMR, SEM, EDX, BET and zeta sizer. The kinetics of adsorption followed a pseudo-second-order model while the Langmuir adsorption isotherm provided the best fit with a maximum adsorption capacity of 177...
March 11, 2017: International Journal of Biological Macromolecules
Jie Ding, Zhiquan Yang, Chong He, Xiaowen Tong, Ying Li, Xiaojun Niu, Hongguo Zhang
This study provides the first attempt to combine UiO-66(Zr) with Bi2MoO6 for the preparation of composite via electrostatic interaction induced self-assembly process. Synthesized products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscope (FT-IR), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface area analyse and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activities of as-obtained Bi2MoO6/UiO-66(Zr) composites were assessed by degradation of Rhodamine B (Rh B) under the visible-light irradiation...
July 1, 2017: Journal of Colloid and Interface Science
Songbo Wang, Xiangwen Zhang, Shuai Li, Yuan Fang, Lun Pan, Ji-Jun Zou
ZnO is an important semiconductor and has been widely used in the field of photocatalysis, solar cell and environmental remediation. Herein, we fabricated C-doped ZnO ball-in-ball hollow microspheres (BHMs) by a facile solvothermal treatment of zinc acetate in ethylene glycol-ethanol mixture. The presence of ethylene glycol (EG) leads to the formation of initial single-layered hollow spheres and then a time-dependent evolution transforms them into uniform BHMs with tunable shell thickness and void space. XPS characterizations reveal that C-dopants are introduced into the lattice of ZnO BHMs, with its concentration increasing with solvothermal time and then becoming saturated in 12h...
February 27, 2017: Journal of Hazardous Materials
Sowmya Vilvanathan, S Shanthakumar
In this research, the potential of a relatively new adsorbent prepared from Tectona grandis leaves by pyrolysis for heavy metal removal from aqueous solution was studied. Adsorption behavior of the pyrolytic biochar was investigated with respect to Ni(2+) and Co(2+) removal with its affinity examined through batch studies on the effect of pH, adsorbent dose, initial ion concentration, time and the mechanism elucidated using different empirical isotherm and kinetic models. A significantly higher efficiency of 92...
March 8, 2017: Environmental Technology
Motahare Nosuhi, Alireza Nezamzadeh-Ejhieh
In this work, Cu(II)-exchanged clinoptilolite nanoparticles (Cu(II)-NCL) were prepared and characterized by FTIR, BET, XRD and TEM techniques. The obtained Cu(II)-NCL was then used for the modification of carbon paste electrode (CPE). The resulted Cu(II)-NCL/CPE was finally used for the voltammetric determination of amoxicillin (AMX). The best voltammetric response was obtained by the electrode containing 20% of the modifier in 0.05molL(-1) NaCl at pHs 2.2 and 7.2. The electrode showed a linear response in the concentration range of 4...
February 24, 2017: Journal of Colloid and Interface Science
Yu Long, Yansheng Liu, Ziming Zhao, Sha Luo, Wei Wu, Li Wu, He Wen, Ren-Qi Wang, Jiantai Ma
Pd-nitrogen-doped-carbon nanocatalysts (Pd-C/N) with different morphologies, such as porous spheres, yolk-shell and hollow structures, had been synthesized and compared. The yolk-shell Pd-nitrogen-doped-carbon nanocatalysts (YS-Pd-C/N) and hollow Pd-nitrogen-doped-carbon nanocatalysts (H-Pd-C/N) were prepared through different etch time using SiO2 spheres as hard-templates. The as-prepared catalysts were characterized thoroughly by TEM, BET, XRD, FT-IR, and XPS. Importantly, the catalysts have moderate BET specific surface area in the range from 200 to 300m(2)g(-1) and pore volume between 0...
February 22, 2017: Journal of Colloid and Interface Science
Priyanka Roy, Nandini Das
Li containing Bikitaite zeolite has been synthesized by an ultrasound-assisted method and used as a potential material for hydrogen storage application. The Sonication energy was varied from 150W to 250W and irradiation time from 3h to 6h. The Bikitaite nanoparticles were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM) thermo-gravimetrical analysis and differential thermal analysis (TGA, DTA). XRD and IR results showed that phase pure, nano crystalline Bikitaite zeolites were started forming after 3h irradiation and 72h of aging with a sonication energy of 150W and nano crystalline Bikitaite zeolite with prominent peaks were obtained after 6h irradiation of 250W sonic energy...
May 2017: Ultrasonics Sonochemistry
Zhigang Chen, Xiaoliu Chen, Jun Di, Yiling Liu, Sheng Yin, Jiexiang Xia, Huaming Li
A novel graphene-like BN modified BiPO4 material was prepared for the first time via a simple solvothermal process with the assistance of reactable ionic liquid 1-decyl-3-methylimidazolium dihydrogen phosphate ([Omim]H2PO4). The as-prepared photocatalyst was characterized by XRD, FT-IR, Raman, XPS, TEM, DRS, BET, PL, EIS and ESR to investigate the structure, morphology, optical property, surface area, electrical property and active species. The photocatalytic activities of graphene-like BN/BiPO4 materials were evaluated by the degradation of antibiotic enrofloxacin (ENR) under UV light irradiation and the 1wt% graphene-like BN/BiPO4 displayed the best activity among the BN/BiPO4 composites...
April 15, 2017: Journal of Colloid and Interface Science
Senar Aydin
  The aim of this study was to investigate the usability of magnetic Fe3O4/red mud nanoparticles (NPs) for the removal of organophosphorus pesticides from water samples. The effect of various experimental parameters such as red mud amount in Fe3O4/red mud-NPs, pH, contact time, initial pesticide concentrations and adsorbent dose was studied in order to find the optimum conditions for their removal in a batch process. The Fe3O4/red mud-NPs were characterized by using TGA, SEM, XRD, VSM, and determination of the BET surface area...
December 1, 2016: Water Environment Research: a Research Publication of the Water Environment Federation
M Abdullah, S K Kamarudin, L K Shyuan
In this study, TiO2 nanotubes (TNTs) were synthesized via a hydrothermal method using highly concentrated NaOH solutions varying from 6 to 12 M at 180 °C for 48 h. The effects of the NaOH concentration and the TNT crystal structure on the performance for methanol oxidation were investigated to determine the best catalyst support for Pt-based catalysts. The results showed that TNTs produced with 10 M NaOH exhibited a length and a diameter of 550 and 70 nm, respectively; these TNTs showed the best nanotube structure and were further used as catalyst supports for a Pt-based catalyst in a direct methanol fuel cell...
December 2016: Nanoscale Research Letters
Ting Jin, Wenhua Yuan, Yujie Xue, Hong Wei, Chaoying Zhang, Kebin Li
Antibiotics are emerging contaminants due to their potential risks to human health and ecosystems. Poor biodegradability makes it necessary to develop effective physical-chemical methods to eliminate these contaminants from water. The cobalt-modified MCM-41 was prepared by a one-pot hydrothermal method and characterized by SAXRD, N2 adsorption-desorption, SEM, UV-Vis DR, and FTIR spectroscopy. The results revealed that the prepared 3% Co-MCM-41 possessed mesoporous structure with BET surface areas at around 898...
December 21, 2016: Environmental Science and Pollution Research International
WeiWen Wong, H Y Wong, A Borhan M Badruzzaman, H H Goh, Mukter Zaman
Recently, increasing research efforts have been made to exploit the enormous potential of nanotechnology and nanomaterial in the application of arsenic removal from water. As a result, there are myriad of types of nanomaterials being developed and studied for their arsenic removal capabilities. Nevertheless, challenges such as having a complete understanding of the material properties and removal mechanism make it difficult for researchers to engineer nanomaterials that are best suited for specific water treatment applications...
January 27, 2017: Nanotechnology
Clara Jiménez-Saelices, Bastien Seantier, Bernard Cathala, Yves Grohens
Nanofibrillated cellulose (NFC) aerogels were prepared by spray freeze-drying (SFD). Their structural, mechanical and thermal insulation properties were compared to those of NFC aerogels prepared by conventional freeze-drying (CFD). The purpose of this investigation is to develop superinsulating bioaerogels by reducing their pore size. Severe reduction of the aerogel pore size and skeleton architecture were observed by SEM, aerogels prepared by SFD method show a fibril skeleton morphology, which defines a mesoporous structure...
February 10, 2017: Carbohydrate Polymers
Reza Hasanzadeh, Peyman Najafi Moghadam, Naeimeh Bahri-Laleh, Mika Sillanpää
In this study, effective novel magnetic nanocomposite particles (MNCPs) were prepared based on iminodiacetic acid grafted poly (glycidylmethacrylate-maleicanhydride) (PGMA-MAn) copolymer. For this purpose, firstly Fe3O4 nanoparticles reacted with 3-aminopropyl triethoxysilane for the production of magnetite nanoparticles containing amine groups (MNPs-NH2). Then iminodiacetic acid reacted with PGMA-MAn copolymer to produce iminodiacetic acid grafted PGMA-MAn copolymer (ID-g-PGMA-MAn). Finally, the MNPs-NH2 reacted with the ID-g-PGMA-MAn and the reaction was completed by propylenediamine (PDA) to produce MNCPs...
March 15, 2017: Journal of Colloid and Interface Science
Marion Campbell, Silvia Ruiz Buitrago
A short cut review was carried out to establish whether a vagal manoeuvre was better than or as good as adenosine at safely terminating supraventricular tachycardia in children. Forty unique papers were found in Medline and Embase using the reported searches, of which five were relevant. A hand search of the forty unique citations identified a further nine relevant papers. Thus, 14 papers presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these best papers are tabulated...
January 2017: Emergency Medicine Journal: EMJ
Kevin Mackway-Jones
No abstract text is available yet for this article.
January 2017: Emergency Medicine Journal: EMJ
Louis-David Audette
A short cut review was carried out to establish whether a standard frontal view CXR as good as standard frontal and lateral views at diagnosing pneumonia in children with a clinical suspicion of that diagnosis. Three papers presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are tabulated. It is concluded that the addition of a lateral view does not appear to significantly improve the accuracy of pneumonia diagnosis in children by emergency physicians, when compared with frontal view alone...
January 2017: Emergency Medicine Journal: EMJ
Hadis Derikvandi, Alireza Nezamzadeh-Ejhieh
In the present work, coupled and supported NiS and ZnS onto the mechanically prepared clinoptilolite nanoparticles (NC) was prepared and characterized by XRD, FTIR, SEM-EDX, X-ray mapping, DRS, BET, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The obtained catalysts were used in photodegradation of metronidazole (MZ). The mole ratio of NiS/ZnS affects the degradation activity of the obtained catalysts so the best activity was obtained for the NZ4-NC (NiS1.0-ZnS5.2/NC, containing 1...
March 15, 2017: Journal of Colloid and Interface Science
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