Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (06): 947-950.

Article

负载二氧化钛纳米线多孔钛镍合金的制备及应用

1. 北京师范大学核科学与技术学院 北京 100875
• 投稿日期:2012-12-04 发布日期:2013-04-23
• 通讯作者: 刘培生,liu966@263.net E-mail:liu966@263.net
• 基金资助:

项目受中央高校基本科研业务费专项资金(No. 2009SD-26)和北师大测试基金(C10)资助.

Preparation and Application of TiO2 Nanowires-loaded Porous Ti-Ni Alloy

Cui Guang, Liu Peisheng

1. College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875
• Received:2012-12-04 Published:2013-04-23
• Supported by:

Project supported by the Fundamental Research Funds for the Central Universities (No. 2009SD-26) and Testing funds of Beijing Normal University (C10).

Porous Ti-Ni alloy was prepared by dipping method and vacuum sintering. Glue and Ti-Ni powders (95 wt% Ti+5 wt% Ni) were mixed together to get a slurry. Then a piece of open cell polymer foam (20 mm×20 mm×2 mm) was dipped into the slurry. After being stirred in the slurry for 1 h, the polymer foam was pulled out and squeezed to remove extra slurry. The polymer foam loaded with Ti-Ni slurry was sintered at 1473 K in vacuum for 2 h. With the decomposition of polymer foam at high temperature, an open cell porous Ti-Ni alloy with pore diameter about 0.2 mm was obtained. Because of the addition of Ni powders, porous Ti-Ni alloy has obvious metal luster. A hydrothermal process was applied for TiO2 nanowires preparation. 5 g of porous Ti-Ni alloy was placed in 20 mL H2O2 (30%) aqueous solution at 373 K for 16 h. Then the porous Ti-Ni alloy was filtered out and washed with deionized water. After being dried at 373 K for 6 h, TiO2 nanowires-loaded porous Ti-Ni alloy (TWP-alloy) was obtained. Then the TWP-alloy was characterized by X-ray diffraction and scanning electron microscope. The length of TiO2 nanowires on the surface of Ti-Ni porous alloy was about 2 μm and the diameter of the nanowires was about 20 nm. In the XRD pattern of TWP-alloy, the major phase was Ti and minor phase was TiNi. After being heat-treated at 723 K for 4 h, the phase of the TiO2 nanowires coated on porous Ti-Ni alloy was changed into rutile. During the heat-treatment from 298 K to 723 K, no anatase phase was observed. This means the formation of anatase phase was blocked by the dimension effect of TiO2 nanowires. Then a kind of streaming wastewater treatment instrument was assembled by using TWP-alloy as anode and porous Ni as cathode. Methyl orange solution was taken as a sample to investigate the wastewater processing efficiency of TWP-alloy. Under the anode voltage of 30 V, the discoloration of methyl orange can get 93% under the flow velocity of 200 mL/min.