• Jin Liu

      Articles written in Bulletin of Materials Science

    • Low-firing Li2ZnTi3O8 microwave dielectric ceramics with BaCu(B2O5) additive

      Guo-Hua Chen Jin Liu Xu-Qiong Li Hua-Rui Xu Min-Hong Jiang Chang-Rong Zhou

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      Phase purity, microstructure, sinterability and microwave dielectric properties of BaCu(B2O5)-added Li2ZnTi3O8 ceramics and their cofireability with Ag electrode were investigated. A small amount of BaCu (B2O5) can effectively reduce the sintering temperature from 1075°C to 925°C, and it does not induce much degradation of the microwave dielectric properties. Microwave dielectric properties of 𝜀r = 23.1, 𝑄 × 𝑓 = 22,732 GHz and 𝜏𝑓= −17.6 ppm/°C were obtained for Li2ZnTi3O8 ceramic with 1.5 wt% BaCu(B2O5) sintered at 925°C for 4 h. The Li2ZnTi3O8 +BCB ceramics can be compatible with Ag electrode, which makes it a promising microwave dielectric material for low-temperature co-fired ceramic technology application.

    • UV and visible light photodegradation effect on Fe–CNT/TiO2 composite catalysts

      Zhen Li Jin Liu Feng-Jun Zhang Won-Chun Oh

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      Using multi-walled carbon nanotube (CNT) as an one-dimensional support, we have succeeded in uniformly anchoring of TiO2 and Fe nanoparticles at its surface. The as-prepared Fe–CNT/TiO2 composite photocatalysts have been investigated by degrading methylene blue (MB) under UV and differently intensified visible light irradiation. The ability of CNT to store and shuttle electrons, and Fe nanoparticles demonstrate its capability to serve as a yield and transfer electrons on demand to separate h+/e- pairs. Moreover, the MB photodegradation increase with an increase of visible light intensity can be ascribed to the enhancement MB cationic radical. In addition, chemical oxygen demand (COD) of piggery waste and reduction efficiency of Cr (IV) was done at regular intervals, which gave a good idea about mineralization of wastewater.

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