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Liu L.,Collaborative Innovation Center for Marine Biomass Fibers | Liu W.,Qingdao University | Zhao X.,Collaborative Innovation Center for Marine Biomass Fibers | Chen D.,University of Science and Technology of China | And 5 more authors.
ACS Applied Materials and Interfaces | Year: 2014

Radioactive iodine isotopes that are produced in nuclear power plants and used in medical research institutes could be a serious threat to the health of many people if accidentally released to the environment because the thyroid gland can absorb and concentrate them from a liquid. For this reason, uptake of iodide anions was investigated on microrosette-like δBi2O3 (MR-δ-Bi2O3). The MR-δ-Bi2O3 adsorbent showed a very high uptake capacity of 1.44 mmol g-1 by forming insoluble Bi4I2O5 phase. The MR-δ-Bi2O3 also displayed fast uptake kinetics and could be easily separated from a liquid after use because of its novel morphology. In addition, the adsorbent showed excellent selectivity for I- anions in the presence of large concentrations of competitive anions such as Cl- and CO3 2-, and could work in a wide pH range of 4-11. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions. © 2014 American Chemical Society. Source


Liu S.,Qingdao University | Liu S.-L.,Qingdao University | Long Y.-Z.,Qingdao University | Long Y.-Z.,Key Laboratory of Photonics Materials and Technology in Universities of Shandong | And 9 more authors.
Applied Physics Letters | Year: 2014

Ce-doped p-type ZnO nanofibers were synthesized by electrospinning and followed calcinations. The surface morphology, elementary composition, and crystal structure of the nanofibers were investigated. The field effect curve confirms that the resultant Ce-doped ZnO nanofibers are p-type semiconductor. A p-n heterojunction device consisting of Ce-doped p-type ZnO nanofibers and n-type indium tin oxide (ITO) thin film was fabricated on a piece of quartz substrate. The current-voltage (I-V) characteristic of the p-n heterojunction device shows typical rectifying diode behavior. The turn-on voltage appears at about 7 V under the forward bias and the reverse current is impassable. © 2014 AIP Publishing LLC. Source


Lin D.-P.,Qingdao University | He H.-W.,Qingdao University | Huang Y.-Y.,Qingdao University | Han W.-P.,Qingdao University | And 5 more authors.
Journal of Materials Chemistry C | Year: 2014

We report an effective method to fabricate poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)-polyvinyl pyrrolidone (PEDOT:PSS-PVP) fiber arrays doped with ionic liquid (IL). The twisted microropes were obtained by twisting the electrospun aligned polymer fiber arrays. It was found that the twisted rope exhibited higher electrical conductivity (∼1.8 × 10-4 S cm-1) after IL doping (1.96 wt%) than those without doping (∼0.8 × 10-5 S cm-1), and its conductivity was linearly correlated with strain up to 35% (which is one magnitude larger than previous reports) and showed repeatable cycle loops of tensile-resilience. The extensible rate could reach up to more than 90%, considerably higher than that of ropes without IL doping (∼17%). The results indicate that the twisted PEDOT:PSS-PVP ropes may be used as elastic semiconductors and stretchable sensors. is © the Partner Organisations 2014. Source


Hao L.,Qingdao University | Hao L.,Collaborative Innovation Center for Marine Biomass Fibers | Hao L.,Sunvim Group Co. | Wang R.,Qingdao University | And 5 more authors.
Carbohydrate Polymers | Year: 2015

In this research, titanium dioxide (TiO2) nano-fibers with a well-organized anatase structure were synthesized by a hydrothermal method. Their structural properties were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and transmission electron microscope (TEM) analysis, respectively. Subsequently, the TiO2 nano-fibers were optically excited under the ultraviolet (UV) irradiation to decolorize the reactive dye solution. The influences of initial pH, concentrations of reactive dye and TiO2 nano-fibers as well as irradiation time on rate of photocatalytic decolorization were investigated. Based on their excellent photocatalytic performance, a novel method for achieving the synchronized wash-off of reactive-dyed cotton and decolorization of resultant wastewater was developed. It was found that the wash fastness of reactive-dyed cotton after TiO2-based wash-off was equal to that after standard way. The influences of TiO2-based wash-off on the properties of cotton substrates were determined by Fourier transform infrared spectroscopy (FTIR), XRD, and scanning electron microscope (SEM) analysis, respectively, which indicated that this new synchronized method would exert few damages to the cotton substrate. © 2015 Elsevier Ltd. Source


Wang J.,CAS Qingdao Institute of Oceanology | Wang J.,Chinese Academy of Sciences | Wang J.,Collaborative Innovation Center for Marine Biomass Fibers | Liu H.,Nantong University | And 5 more authors.
Marine Drugs | Year: 2014

Diabetic nephropathy (DN) has long been recognized as the leading cause of end-stage renal disease, but the efficacy of available strategies for the prevention of DN remains poor. The aim of this study was to investigate the possible beneficial effects of fucoidan (FPS) in streptozotocin (STZ)-induced diabetes in rats. Wistar rats were made diabetic by injection of STZ after removal of the right kidney. FPS was administered to these diabetic rats for 10 weeks. Body weight, physical activity, renal function, and renal morphometry were measured after 10 weeks of treatment. In the FPS-treated group, the levels of blood glucose, BUN, Ccr and Ucr decreased significantly, and microalbumin, serum insulin and the β2-MG content increased significantly. Moreover, the FPS-treated group showed improvements in renal morphometry. In summary, FPS can ameliorate the metabolic abnormalities of diabetic rats and delay the progression of diabetic renal complications. © 2014 by the authors licensee MDPI. Source

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