Zhenjiang, China
Zhenjiang, China

Time filter

Source Type

Liu C.,Beihua University | Liu C.,Jiangsu University | Yin H.-B.,Jiangsu University | Shi L.-P.,Beihua University | And 6 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2013

The adsorbability of hollow SiO2 nanospheres of high adsorption capacity and large specific surface area for Pb2+, Cu2+, and Cr3+ ions was investigated. The absorbtion equilibrium data were fitted by Langmuir linear equation. The results show that hollow SiO2 nanospheres have high adsorption capacity for heavy metal ions, the adsorption capacities for Pb2+, Cu2+ and Cr3+ ions are 1.256, 0.681, and 0.563 mmol/g, respectively. As the fitting data shown, there is a strong correlation between the adsorption capacity and ion characteristics (covalent index and charge density). The adsorption capacity increases with the increase in covalent index or decrease in charge density. The adsorption constant is related to electric field intensity of ion (effective nuclear charge), and the adsorption constant increases with the increase in effective nuclear charge of ion. This adsorption process should belong to chemisorption. The regenerated adsorbent can be reused many times.


Liu C.,Jiangsu University | Liu C.,Beihua University | Yin H.-B.,Jiangsu University | Wang A.-L.,Jiangsu University | And 5 more authors.
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2012

Different-sized hollow SiO 2 spheres of 249-1348 nm in diameter were successfully prepared by using Na 2SiO 3 as the precursor and using polystyrene and polystyrene-methyl acrylic acid latexes as the templates. The diameter and shell thickness of the hollow SiO 2 spheres increase with increasing the latex template diameter at a given mass ratio of SiO 2 to latex template. The diameter and shell thickness of the hollow SiO 2 spheres also increase with increasing the mass ratios of SiO 2 to latex template. The presence of carboxylic acid groups on the surfaces of polystyrene-methyl acrylic acid latex templates favors the formation of dense and uniform SiO 2 shells. The hollow SiO 2 sphere is constructed by mesoporous shell with large specific surface area. When glyphosate is used as a release model chemical, glyphosate release rate is tuned by varying the shell thickness. © 2012 The Nonferrous Metals Society of China.


Liu C.,Jiangsu University | Liu C.,Beihua University | Yin H.,Jiangsu University | Shi L.,Beihua University | And 6 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2014

Hollow titania spheres with different shell thicknesses were facilely prepared starting from TiCl4and using ploystyrene methyl acrylic acid latexes as the sacrificial templates. The average diameters of the hollow titania spheres ranging from 294 to 340 nm were tuned by changing the weight ratios of TiO2to ploystyrene methyl acrylic acid latex from 0.8:1 to 1.4:1. The hollow titania spheres were constructed by the small-sized anatase TiO2nanoparticles with the average diameter of ca. 18 nm (SEM). In addition to UV light absorption caused by the primary anatase TiO2nanoparticles, the hollow titania spheres also had visible light absorption performance. Photocatalytic results showed that all the hollow titania spheres had higher photocatalytic activity for the degradation of phenol under visible light irradiation than the commercial TiO2nanoparticles (P25). The photocatalytic activity of the hollow titania spheres increased with the increase in sell thickness, being consistent with their visible light absorbance. The visible light photocatalytic activity was probably due to the presence of additional energy levels between valence and conduction bands, which were caused by the formation of oxygen bridging bonds between the primary TiO2nanoparticles. Copyright © 2014 American Scientific Publishers All rights reserved.


Ji Y.,Jiangsu University | Gao J.,Jiangsu University | Yin H.,Jiangsu University | Wang A.,Jiangsu University | And 3 more authors.
Journal of Nanoscience and Nanotechnology | Year: 2015

Hollow silica microspheres with mesoporous shells were prepared by the sacrificial template method. Hollow silica microsphere-containing acrylate resin-based dental restoration materials were prepared by using hollow silica microspheres as NaF reservoirs. Fluoride release performances from naked hollow silica microspheres, acrylate resin, and hollow silica microsphere-containing acrylate resin-based dental restorative materials in an artificial saliva were investigated. The results showed that hollow silica microsphere-containing acrylate resin-based dental restorative materials had higher cumulative fluoride release quantities and sustained fluoride release rates than traditional acrylate resin-based dental restorative materials. Fluoride release could be tuned by changing the mesoporous shell thickness of hollow silica microsphere. Copyright © 2015 American Scientific Publishers All rights reserved.


Chen J.,Jiangsu University | Chen J.,Chinese PLA 359 Hospital | Gao J.,Jiangsu University | Yin H.,Jiangsu University | And 10 more authors.
Materials Science and Engineering C | Year: 2013

Different-sized α-calcium sulphate hemihydrate (α-CSH) rods were hydrothermally prepared by converting calcium sulphate dihydrate at 110-140 C in the presence of MgCl2, sodium citrate (CANa), and sodium dodecyl benzene sulfonate (SDBS) as the modifiers. The α-CSH rods with the average diameters and the average lengths in the ranges of 2.6-5.2 and 17.5-33.1 μm, respectively, were tunably prepared. The presence of the modifiers favoured the formation of small-sized α-CSH rods. The effect of the modifiers on decreasing the diameters of α-CSH rods was in an order of SDBS > CANa > MgCl2. The dissolution rates of the different-sized α-CSH rods prepared at 140 C in simulated body fluid were in an order of α-CSH (CANa) > α-CSH (MgCl2) > α-CSH (reference) > α-CSH (SDBS). The naked and small-sized α-CSH rods had high dissolution rates. The adsorption of SDBS on the surfaces of α-CSH rods decreased their dissolution rates. © 2013 Elsevier B.V.


Ji Y.,Jiangsu University | Wang A.,Jiangsu University | Wu G.,Chinese PLA 359 Hospital | Yin H.,Jiangsu University | And 4 more authors.
Materials Science and Engineering C | Year: 2015

Porous biocompatible hydroxyapatite (HAP) nanorods of various sizes were synthesized by the combination of chemical precipitation and hydrothermal method without the use of organic modifiers. The HAP nanorod samples were characterized by powder X-ray diffraction, transmission electron microscopy, and N2 adsorption/desorption techniques. HAP nanorods with average diameters and average lengths ranging from 8.5 to 26.6 nm and from 23.1 to 49.7 nm, respectively, could be controllably synthesized via these methods. Low autoclaving temperature and high pH value favored the formation of relatively small HAP nanorods. The TEM images showed that the nanorods possessed porous structures with average pore diameters ranging from 1.6 to 2.7 nm. These HAP nanoparticles effectively prolonged the release time of 5-fluorouracil up to 24 h. The assynthesized HAP nanorods displayed no cytotoxicity to bone marrow stem cells at low HAP concentration, indicating that these nanorod materials could serve as potential carriers for novel drug release systems. © 2015 Elsevier B.V. All rights reserved.


Wang A.,Jiangsu University | Ge C.,Jiangsu University | Yin H.,Jiangsu University | Gao Y.,Chinese PLA 359 Hospital | And 4 more authors.
Applied Surface Science | Year: 2013

SiO2 coating layers were uniformly anchored at the surfaces of sandblasted/pre-oxidized commercially pure titanium (CP-Ti) substrates by the chemical deposition method using Na2SiO3 as the SiO 2 precursor at the pH values of 8-10 with the Na2SiO 3 concentrations of 0.05-0.5 mol/L. The SiO2 coating layers were composed of small-sized SiO2 nanoparticles with the average particle sizes ranging from 18.0 to 20.5 nm. After firing porcelain (Ti-22) on SiO2-coated sandblasted/pre-oxidized CP-Ti substrates, the bond strengths of CP-Ti and porcelain ranged from 33.56 to 40.43 MPa, which were detected by the three-point flexure bend test method. In the absence of SiO2 interlayer, the bond strength of sandblasted/pre-oxidized CP-Ti and porcelain was 25.6 MPa. The bond strengths in the presence of SiO 2 interlayer were higher than that in the absence of SiO2 interlayer. On the other hand, when the CP-Ti substrates were only treated by hydrochloric acid pickling, the bond strengths of SiO2-coated acid-pickled CP-Ti and porcelain ranged from 12.99 to 16.59 MPa. The chemical interaction between the SiO2 interlayers and the oxidized CP-Ti surfaces probably played an important role in increasing the bond strength of CP-Ti and porcelain. © 2013 Elsevier B.V. All rights reserved.


PubMed | Jiangsu University, Chinese PLA 359 Hospital and Mianyang Normal University
Type: | Journal: Materials science & engineering. C, Materials for biological applications | Year: 2015

Porous biocompatible hydroxyapatite (HAP) nanorods of various sizes were synthesized by the combination of chemical precipitation and hydrothermal method without the use of organic modifiers. The HAP nanorod samples were characterized by powder X-ray diffraction, transmission electron microscopy, and N2 adsorption/desorption techniques. HAP nanorods with average diameters and average lengths ranging from 8.5 to 26.6 nm and from 23.1 to 49.7 nm, respectively, could be controllably synthesized via these methods. Low autoclaving temperature and high pH value favored the formation of relatively small HAP nanorods. The TEM images showed that the nanorods possessed porous structures with average pore diameters ranging from 1.6 to 2.7 nm. These HAP nanoparticles effectively prolonged the release time of 5-fluorouracil up to 24h. The as-synthesized HAP nanorods displayed no cytotoxicity to bone marrow stem cells at low HAP concentration, indicating that these nanorod materials could serve as potential carriers for novel drug release systems.

Loading Chinese PLA 359 Hospital collaborators
Loading Chinese PLA 359 Hospital collaborators