کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6579768 | 1422935 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of C@silica core/shell nanoparticles from ZIF-8 for efficient ciprofloxacin adsorption
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation of C@silica core/shell nanoparticles from ZIF-8 for efficient ciprofloxacin adsorption Preparation of C@silica core/shell nanoparticles from ZIF-8 for efficient ciprofloxacin adsorption](/preview/png/6579768.png)
چکیده انگلیسی
Ciprofloxacin (CIP) in water is harmful to fish, human body and potentially harmful to ecological system, thus it needs to be removed. Adsorption is a simple treatment method, but the reported adsorbents rarely showed high adsorption performance. Herein, we present the preparation of a C@silica core/shell nanoparticles material for removal of CIP from aqueous solution. The nanoparticles were prepared by first coating a layer of silica gel on ZIF-8 nanoparticles via hydrolysis of tetraethoxysilane (TEOS), followed by carbonization. XRD, FT-IR, TEM, and N2 adsorption-desorption analysis were employed to examine the obtained products. TEM images clearly show the core/shell structures with a thickness of the silica layer of 13-28â¯nm. N2 adsorption-desorption results exhibit the textural properties of the products with both micro- and meso-pores and a high surface area of 594.4â¯m2/g. More CIP amount can be adsorbed from water with higher surface area. The equilibrium adsorption amount reaches a climax at pH 6. The maximum CIP adsorption amount of the C@silica core/shell nanoparticles is 516.8â¯mg/g, much higher than the parental carbon. In addition, the maximum CIP adsorption amount is significantly increased to 1575â¯mg/g with the presence of Cu(II) in the aqueous solution. We investigated the mechanism for the increased adsorption capacity of the C@silica core/shell nanoparticles materials, indicating that the silica coating makes these nanoparticles more negatively charged and thus benefits the adsorption of CIP via stronger electrostatic interaction. The C@silica nanoparticles can be easily prepared and their CIP adsorption capacity is very high. The results show that the C@silica nanoparticles are promising candidates for removal of CIP from water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 343, 1 July 2018, Pages 645-653
Journal: Chemical Engineering Journal - Volume 343, 1 July 2018, Pages 645-653
نویسندگان
Yupeng Li, Changfeng Zeng, Chongqing Wang, Lixiong Zhang,