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High Cr(VI) adsorption capacity of rutile titania prepared by hydrolysis of TiCl 4 with AlCl 3 addition
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-020-1965-8
Shun Wu , Xiao-bo He , Li-jun Wang , Kuo-Chih Chou

Rutile titania (TiO2) was successfully prepared via hydrolysis of TiCl4 in the presence of AlCl3. The powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area analysis. In the present system, AlCl3 functions as a nucleating agent and induces the formation of rutile TiO2. The influences of HCl and isopropanol concentrations on the purity and morphology of the rutile TiO2 were investigated. The purity of the rutile TiO2 increased with increasing concentration of HCl. Evenly dispersed rutile TiO2 particles with a spherical morphology were obtained when the HCl and isopropanol concentrations were 0.5 and 1 mol·L−1, respectively. Furthermore, the prepared TiO2 powders were used in adsorption tests of the heavy metal pollutant Cr(VI). Rutile TiO2 sample S-9 demonstrated greater adsorption performance and a removal efficiency that was greater than 99.95% after 60 min of adsorption when the Cr(VI) concentration was 200 mg·L−1 The maximum adsorption capacity on rutile TiO2 was 28.9 mg·g−1. This work provides an easy path to prepare a high-performance rutile TiO2 adsorbent with potential applications in water pollution treatment.



中文翻译:

通过添加AlCl 3水解TiCl 4制备的金红石型二氧化钛对Cr(VI)的高吸附能力

在AlCl 3存在下,通过TiCl 4的水解成功制备了金红石型二氧化钛(TiO 2)。通过X射线粉末衍射(XRD),扫描电子显微镜(SEM)和Brunauer-Emmett-Teller(BET)表面积分析来表征粉末。在本系统中,AlCl 3用作成核剂并诱导金红石型TiO 2的形成。研究了HCl和异丙醇浓度对金红石型TiO 2纯度和形貌的影响。金红石型TiO 2的纯度随着HCl浓度的增加而增加。均匀分散的金红石型TiO 2当HCl和异丙醇的浓度分别为0.5和1mol·L - 1时,获得具有球形形态的颗粒。此外,将制备的TiO 2粉末用于重金属污染物Cr(VI)的吸附测试。Cr(VI)浓度为200 mg·L -1时,金红石TiO 2样品S-9的吸附性能更高,吸附60分钟后的去除率大于99.95%。对金红石TiO 2的最大吸附容量为28.9 mg·g -1。这项工作为制备高性能金红石型TiO 2吸附剂提供了简便的途径,并有望在水污染处理中应用。

更新日期:2020-08-15
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