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Structure and Electrical Performance of Na<sub>2</sub>C<sub>6</sub>O<sub>6</sub> under High Pressure
Wang, Xuan,Zhang, Peijie,Tang, Xingyu,Guan, Junjie,Lin, Xiaohuan,Wang, Yajie,Dong, Xiao,Yue, Binbin,Yan, Jinyuan,Li, Kuo,Zheng, Haiyan,Mao, Ho-kwang American Chemical Society 2019 The Journal of Physical Chemistry Part C Vol. No.
<P>Sodium rhodizonate (Na<SUB>2</SUB>C<SUB>6</SUB>O<SUB>6</SUB>) has very high theoretical capacity as a positive electrode material of sodium-ion batteries, but it still has problems such as low actual capacity and poor electronic/ionic conductivity. In order to improve its conductivity, we investigated its structure and electrical properties under high pressure. By performing in situ X-ray diffraction, Raman, infrared absorption, and alternating current impedance spectroscopy in the range of 0-30 GPa at room temperature, we observed a phase transition at ∼11 GPa, with the conductivity increasing by an order of magnitude. Above ∼20 GPa, Na<SUB>2</SUB>C<SUB>6</SUB>O<SUB>6</SUB> gradually amorphized. During the decompression process, the pressure regulation of the structure and properties of the material are reversible. Our study shows that applying external pressure is an effective tool to improve the conductivity of molecular battery materials. The investigation will help to obtain next-generation electrode materials.</P> [FIG OMISSION]</BR>
Chang Tian,Hui Zhang,Pei Chen,Yueyue Song,Jinyuan Zhang 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
To efficiently remove pollutants such as dyes, antibiotics and heavy metal ions from wastewater without causingsecond polluting, it is imperative and challenging to prepare the omnipotence photocatalysis materials. In this study, wool/Fe3O4@TiO2/UiO-66 composite was prepared by a facile one-step solvothermal method. The morphology, composition,structure, chemical bonding states, magnetism, specific surface area, and optical properties of the resultant composite weresystematically examined. Experiment results suggested that the specific surface area of the wool/Fe3O4@TiO2/UiO-66increased from 370.48 to 465.06 m2/g when wool particles were incorporated into Fe3O4@TiO2/UiO-66. Both the compositesexhibited the superior photocatalytic degradation and reduction capabilities toward cationic methylene blue (MB) and anionicCongo red (CR) dyes, tetracycline hydrochloride (TC-HCl) and Cr(VI) ions under visible lights. For organic dyes and heavymetal ions, the wool/Fe3O4@TiO2/UiO-66 composite behaved much better than the Fe3O4@TiO2/UiO-66 one, however, itwas contrary for TC-HCl. The magnetic wool/Fe3O4 core imparted the composite with the easily recyclable ability because ofthe ferromagnetic and superparamagnetism behaviors of Fe3O4. The TiO2/UiO-66 hybrid shell endowed the photocatalyticproperty of the composite. The wools had a strong adsorption ability toward MB and CR dyes and Cr(VI) ions. The wool/Fe3O4@TiO2/UiO-66 composite possessed good stability and repeatability to MB photodegradation and Cr(VI)photoreduction. The holes and singlet oxygen radicals were the main reactive species, while the superoxide and hydroxylradicals were also involved.
Ultrafast UV Switch Based on ZnO-Ag Heterostructures
XIU-YUN AN,Feng Teng,Zhenxing Zhang,Xiaojun Pan,Jinyuan Zhou,ER-QING XIE 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.1
ZnO-silver (Ag) heterostructure nanoparticle films were prepared by spin-coating, followed by annealing at 700°C for 2 h. The films were then used as UV photodetector which show high photoresponse. The heterostructure-film device displayed an ultrafast decay time of 18 ms and a rise time of 50 ms upon ultraviolet irradiation. Additionally, the time-dependent photocurrent upon UV switching reveals a rectangularly shaped profile, rarely reported in previous literature. The highly improved photoresponse properties of ZnO-Ag heterostructure-film device could be attributed to the Schottky barrier height (SBH) and depletion width reduction from the embedded Ag nanoclusters. Compared to a pure ZnO film, both the responsivity (Rλ) and external quantum efficiency (EQE) of the ZnO-Ag heterostructure-film photodetectors were improved more than 13-fold. This research provides a promising strategy for fabricating UV-photodetectors with ultrafast response.
Molybdenum Dioxide-Anchored Graphene Foam as a Negative Electrode Material for Supercapacitors
Xuemei Mu,Xiaozhi Liu,Ke Zhang,Jian Li,Jinyuan Zhou,ER-QING XIE,Zhenxing Zhang 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.2
Molybdenum dioxide nanoparticles of diameter 100 nm were anchoreduniformly to a three-dimensional (3D) graphene foam using an ultrasonicationassisteddeposition method. X-ray diffraction and Raman spectroscopyindicated that the molybdenum dioxide nanoparticles had a monoclinic crystalstructure. The 3D graphene/MoO2 nanoparticle composite showed excellentpseudocapacitive ability as its specific capacitance reached 404 F g−1 at a scanrate of 2 mV s−1 in the negative potential range, −1.0 to −0.2 V, in a neutralsolution. Overall, the 3D graphene/MoO2 nanoparticle composite has greatpotential as an anode material for the next generation of high-performancesupercapacitors.
Shi Si,Gu Huijie,Xu Jinyuan,Sun Wan,Liu Caiyin,Zhu Tong,Wang Juan,Gao Furong,Zhang Jieping,Ou Qingjian,Jin Caixia,Xu Jingying,Chen Hao,Li Jiao,Xu Guotong,Tian Haibin,Lu Lixia 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
Excessive osteoclast activation, which depends on dramatic changes in actin dynamics, causes osteoporosis (OP). The molecular mechanism of osteoclast activation in OP related to type 1 diabetes (T1D) remains unclear. Glia maturation factor beta (GMFB) is considered a growth and differentiation factor for both glia and neurons. Here, we demonstrated that Gmfb deficiency effectively ameliorated the phenotype of T1D-OP in rats by inhibiting osteoclast hyperactivity. In vitro assays showed that GMFB participated in osteoclast activation rather than proliferation. Gmfb deficiency did not affect osteoclast sealing zone (SZ) formation but effectively decreased the SZ area by decreasing actin depolymerization. When GMFB was overexpressed in Gmfb-deficient osteoclasts, the size of the SZ area was enlarged in a dose-dependent manner. Moreover, decreased actin depolymerization led to a decrease in nuclear G-actin, which activated MKL1/SRF-dependent gene transcription. We found that pro-osteoclastogenic factors (Mmp9 and Mmp14) were downregulated, while anti-osteoclastogenic factors (Cftr and Fhl2) were upregulated in Gmfb KO osteoclasts. A GMFB inhibitor, DS-30, targeting the binding site of GMFB and Arp2/3, was obtained. Biocore analysis revealed a high affinity between DS-30 and GMFB in a dose-dependent manner. As expected, DS-30 strongly suppressed osteoclast hyperactivity in vivo and in vitro. In conclusion, our work identified a new therapeutic strategy for T1D-OP treatment. The discovery of GMFB inhibitors will contribute to translational research on T1D-OP.