Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non Ferrous Metal and Featured Materials

Guilin, China

Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non Ferrous Metal and Featured Materials

Guilin, China
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Chen Y.,Guilin University of Technology | Xie X.-L.,Guilin University of Technology | Li C.-J.,Guilin University of Technology | Liang Q.-C.,Guilin University of Technology | And 5 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2016

Organo-montmorillonite (CTA-MMT) and organic-layered double hydroxide (MgAl-SDS-LDH) were exfoliated by ultrasonication in ethyl acetate. Heterogeneous films of (PVA/MMT/PVA/LDH)n was fabricated by layer-by-layer self-assembly (LBL) using exfoliated MMT and LDH nanosheets as assembly unit. The specimens were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM) and UV-vis spectroscopy. The results show that the thickness of exfoliated CTA-MMT and exfoliated MgAl-SDS-LDH nanosheets is about 17 nm and 12 nm, respectively. The spacing of the heterogeneous films is 1.81 nm. Each unit layer of heterogeneous films was comprised of CTA-MMT and MgAl-SDS-LDH nanosheets in one deposited cycle with each unit thickness of 170 nm. UV-vis spectroscopy shown that the heterogeneous films exhibited a strong absorption band at wavelength around 264 nm. The linear relationship between absorbance and thickness of the heterogeneous films indicate the homogeneous structure of (PVA/MMT/PVA/LDH)n. © 2016, Chinese Ceramic Society. All right reserved.


Sun Z.,Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Sun Z.,Guilin University of Technology | Yang C.,Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Yang C.,Guilin University of Technology | And 7 more authors.
Electrochimica Acta | Year: 2017

MoO3–x nanobelts (MoO3-x NBs) were synthesized via a novel “sauna reaction”, providing us an opportunity for illustrating the effect of oxygen vacancies (OVs) on its largely enhanced electrochemical performance. Very exciting, the MoO3-x NBs exhibits much superior performance with 400 and 267 mAh g−1, which is about three times larger than that of the pristine MoO3 NBs (123 and 84 mAh g−1), at the current densities of 100 and 200 mA g−1, respectively. Notably, the OVs and the resulting improved electrical conductivity could be used to account for their largely enhanced specific capacity and rate properties. On one hand, OVs lowered the energy barrier of Li+ into the intralyer of MoO6 octahedron sheet layer and the interlayer of MoO3-x, and provided extra lithium storage sites of MoO3 during discharge-charge process. On the other hand, the improved conductivity of MoO3-x provided efficient electron transport pathways. The results show that OVs control can be a promising strategy for enhancing high-performance Mo-based electrodes by taking advantage of structural characteristics of multiple oxide sates of Mo elements. This study not only provides a new method for the preparation of MoO3-x with rich OVs using a simple, environmentally friendly “sauna reaction”, but also indicates the importance of OVs in the largely enhanced electrochemical performance in MoO3-x NBs, which may shed some light on the future development of electrode materials of lithium-ion batteries (LIBs). © 2017 Elsevier Ltd


Lin Y.,Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Lin Y.,Guilin University of Technology | Xie X.,Guilin University of Technology | Wang X.,Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | And 7 more authors.
Electrochimica Acta | Year: 2017

In terms of the charge storage mechanism of supercapacitors, there are three types, including electrical double layer (EDL), surface redox reaction and intercalation reaction. The surface redox mechanism of transition metal-layered double hydroxides (TM-LDH) supercapacitor had been previously revealed. A dual charge storage mechanism integrated with surface redox and ion intercalation for LDH-based supercapacitors, however, is seldom reported before. For this purpose, here, we synthesized NiCo layered double hydroxide nanosheets via the intrinsic pillar effect of sodium dodecylbenzene sulfonate (NiCo-SDBS-LDH), and found that the surface redox and intercalation behaviors take effect simultaneously in NiCo-SDBS-LDH via electrochemical analysis. The NiCo-SDBS-LDH electrode having a relatively low specific surface area (15.28 m2 g−1) still exhibited a remarkable specific capacitance of 1094 F g−1 at a scan rate of 5 A g−1, and super long cycle life of 81% retention over 3000 cycles. A dual charge storage mechanism is subsequently proposed based on the analysis of our results to explain the excellent properties of NiCo-SDBS-LDH. We believe that the enhancements should mainly be ascribed to the structural feature of the SDBS stabilized NiCo-LDH and the expanded interlayer space of NiCo-SDBS-LDH. These findings open new doors to functional pillared effect to control the electrochemical behaviors of TM-LDH-based materials. © 2017 Elsevier Ltd


Zhang R.,Guilin University of Technology | Zhang R.,Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Wang B.,Guilin University of Technology | Zhu W.,Guilin University of Technology | And 5 more authors.
Journal of Alloys and Compounds | Year: 2017

Ce3+: Y3Al5O12 (Ce-YAG) phosphors-in-glass (PiG), which serves as both luminescent convertor and encapsulating material in the remote white light-emitting diodes (LEDs), has become a promising research field. However, the challenges in processing and mechanical strength still remain due to its submillimeter thickness. Herein, a novel transparent Ce-YAG PiG thick film was coated on a common glass substrate through conventional screen printing process and subsequent heat treatment. The introduced commercial Ce-YAG phosphors almost kept intact in a lead-free glass matrix. The microstructures and luminescent properties of as-prepared samples were investigated systematically. White LED device was also fabricated via mounting the optimal sample on the InGaN blue-emitting chips, which yielded bright white light with considerable luminous efficiency and color quality. The resulting screen-printed Ce-YAG PiG thick film will be a promising candidate for applications in the high-power remote white LEDs. © 2017 Elsevier B.V.


Wei G.,Ministry province Jointly constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Wei G.,Guangxi University | Shao L.,Guangxi University | Mo J.,Ministry province Jointly constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | And 3 more authors.
Environmental Science and Pollution Research | Year: 2017

Using molasses wastewater as partial acidifying agent, a new Fenton-like catalyst (ACRMsm) was prepared through a simple process of acidification and calcination using red mud as main material. With molasses wastewater, both the free alkali and the chemically bonded alkali in red mud were effectively removed under the action of H2SO4 and molasses wastewater, and the prepared ACRMsm was a near-neutral catalyst. The ACRMsm preparation conditions were as follows: for 3 g of red mud, 9 mL of 0.7 mol/L H2SO4 plus 2 g of molasses wastewater as the acidifying agent, calcination temperature 573 K, and calcination time 1 h. Iron phase of ACRMsm was mainly α-Fe2O3 and trace amount of carbon existed in ACRMsm. The addition of molasses wastewater not only effectively reduced the consumption of H2SO4 in acidification of red mud but also resulted in the generation of carbon and significantly improved the distribution of macropore in prepared ACRMsm. It was found that near-neutral pH of catalyst, generated carbon, and wide distribution of macropore were the main reasons for the high catalytic activity of ACRMsm. The generated carbon and wide distribution of macropore were entirely due to the molasses wastewater added. In degradation of orange II, ACRMsm retained most of its catalytic stability and activity after five recycling times, indicating ACRMsm had an excellent long-term stability in the Fenton-like process. Furthermore, the performance test of settling showed ACRMsm had an excellent settleability. ACRMsm was a safe and green catalytic material used in Fenton-like oxidation for wastewater treatment. © 2017 Springer-Verlag Berlin Heidelberg


Xu Z.,Guilin University of Technology | Wei C.,Guilin University of Technology | Gong Y.,Guilin University of Technology | Chen Z.,Guilin University of Technology | And 3 more authors.
Composite Interfaces | Year: 2016

A highly flexible and conductive nanohybrid film based on multi-walled carbon nanotube (MWNT) was prepared using synergistic dispersion effects of nanosisal cellulose and graphene oxide (GO). The dispersion effect of MWNT was characterized using illustrative diagrams of different dispersions after centrifuge, transmission electron microscope, and Zeta potential, respectively. The results showed that 80 wt% MWNT was efficiently dispersed and formed a stable nanodispersion solution using 10 wt% cellulose nanofiber (CNF) and 10 wt% GO as dispersants. The conductivity and tensile strength of the CNF/GO/MWNT nanocomposite film were up to 1818.19 S/m and 25 MPa, respectively. © 2016 Informa UK Limited, trading as Taylor & Francis Group


Sun F.M.,Ministry province Jointly constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | Sun F.M.,Key Laboratory of Nonferrous Materials and New Processing Technology | Sun F.M.,Guilin University of Technology | Xu W.F.,Ministry province Jointly constructed Cultivation Base for State Key Laboratory of Processing for Non ferrous Metal and Featured Materials | And 8 more authors.
Journal of Polymer Research | Year: 2014

A series of polymerized high internal phase emulsions (polyHIPEs) with different cavities and windows (named PSD) were used as microreactors. Then methyl methacrylate (MMA) was polymerized in the spaces of the polyHIPE by reverse atom transfer radical polymerization (RATRP). The resulting materials and PMMA in the polyHIPEs were characterized by scanning electron microscopy, gel permeation chromatography, Fourier transform infrared spectroscopy, thermogravimetry, hydrogen nuclear magnetic resonance and differential scanning calorimetry. The results suggest that the monomer MMA is polymerized in the PSDs by RATRP. The confinement effect of the different cavities and pores is obvious but it weakens with the increase of the pore size. Compared with the conventional PMMA by RATRP, the number-average molecular weight and temperature of the initial decomposition of the PMMA obtained from PSDs is significantly high, which suggests that the confined space in the PSDs plays an active role in RATRP. © 2014, Springer Science+Business Media Dordrecht.


Xie X.-L.,Guilin University of Technology | Peng P.,Guilin University of Technology | Zhu W.-F.,Guilin University of Technology | Wang L.-I.,Ministry province jointly constructed cultivation base for state key laboratory of Processing for non ferrous metal and featured materials
Advanced Materials Research | Year: 2014

Geopolymeric material (geopolymer) was synthesized by casting and curing method using Bayer process red mud and metakaolin as starting materials. The fixation ability of the geopolymer for Pb2+ was studied by leaching method. The results shown that metakaolin played the role of aluminum and silicon donor during the initial strong alkaline aqueous phase. Red mud had principally the role of filler, increasing in this way the final compressive strength of the geopolymer. The compress strength of geopolymer curing 3 days from metakaolin and red mud mixture is 66MPa. The leaching concentration of Pb2+ from 50% red mud geopolymer is 0.891mg/L as the Pb2+ content in geopolymer is 2.5%; the metakaolin-red mud geopolymer has better Pb2+ fixation ability than metakaolin geopolymer. © (2014) Trans Tech Publications, Switzerland.


Li C.,Guilin University of Technology | Zhang J.,Guilin University of Technology | Lin Y.,Guilin University of Technology | Chen Y.,Guilin University of Technology | And 5 more authors.
Applied Clay Science | Year: 2015

Layered double hydroxide (LDH) was in situ grown on the disordered platelets of montmorillonite (Mt), and a self-assembled sheet-on-sheet nanohybrid was obtained. To obtain a nanohybrid of cationic/anionic clay with exfoliated Mt platelets, NaMt (sodium-montmorillonite) was fractionated and subsequently treated by ultrasonication in a solution of aluminum nitrate and magnesium nitrate to ensure good dispersion of the NaMt and cation adsorption. Subsequently, the precursors were reacted with ammonia under hydrothermal conditions. The phase compositions of the as-prepared samples were analyzed by X-ray diffraction and Fourier transform infrared spectroscopy. Field-emission scanning electron microscopy and high-resolution transmission electron microscopy investigations revealed the typical sheet-on-sheet and exfoliated Mt structures. The results demonstrated that the LDH grown on the disordered platelets of montmorillonite was successfully synthesized by a simple in situ growth route. A possible formation mechanism for the sheet-on-sheet architecture has been suggested. Using ultrasonically pre-exfoliated disordered Mt platelets as matrixes provided an essential substrate for the nucleation and in situ growth of LDH crystallites. The ammonia solution provided hydroxyl moieties for LDH growth and split the Mt platelets via a breaker effect. It is suggested that the in situ-grown LDH crystals, as spacers, played a crucial role in preventing the reaggregation of the disordered Mt platelets. This study can offer some new insights into developing a nanohybrid of cationic/anionic clay with a unique sheet-on-sheet structure. © 2015 Elsevier B.V.


Liang Q.-C.,Guilin University of Technology | Chen Y.,Guilin University of Technology | Li C.-J.,Guilin University of Technology | Xie X.-L.,Guilin University of Technology | And 3 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2015

Acetate-intercalated layered double hydroxide (Aco-LDH) was prepared by ion-exchange of NO3-LDH with sodium acetate trihydrate. The Aco-LDH was delaminated by ultrasonic processing in aqueous solution and montmorillonite (MMT) was dispersed into lamella in water. The LDH/MMT layered composite was gained by electrostatic attraction of delaminated LDH nanosheets with the interlayer of MMT. The composite was characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), atomic force microscope (AFM) and N2-adsorption/desorption. The results show that the thickness of delaminated Aco-LDH nanosheets was 5 nm to 20 nm at the Aco-LDH concentration of 1 mg/mL. The LDH/MMT layered composite obtained by intercalation assembly has sheet-by-sheet assembly structure, and the interlayer space of the composite is 1.50 nm, which is almost the thickness summation of one LDH sheet and one MMT sheet. The specific surface area of the composite is 105.89 m2/g. © 2015, Chinese Ceramic Society. All right reserved.

Loading Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non Ferrous Metal and Featured Materials collaborators
Loading Ministry Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non Ferrous Metal and Featured Materials collaborators