植物还原制备绿色纳米金属材料因环境友好、反应条件温和、可持续发展、可控等优势成为纳米材料合成领域的研究热点.利用黑茶还原制备绿色纳米铁颗粒(BT-FeNPs),采用UV-Vis、XRD、SEM、TEM、EDX、FT-IR等方法对BT-FeNPs进行表征,结果表明,制备的BT-FeNPs为无定形的球形颗粒,粒径20～30 nm左右,纳米颗粒中的铁主要以铁氧化物、氢氧化物及Fe0形式存在,颗粒表面包裹-OH、-NH2、C=O、-CH2、-CH3、C=N、C-O-C等有机基团.并探讨BT-FeNPs对Cr(Ⅵ)的去除性能,在25℃,pH值=4.0,Cr(Ⅵ)初始浓度20 mg/L,反应时间90 min条件下,Cr(Ⅵ)去除率达到96.3％.BT-FeNPs对Cr(Ⅵ)的去除效果及抗氧化性均优于化学法制备的NaBH4-FeNPs.BT-FeNPs对Cr(Ⅵ)的去除主要发生在颗粒表面,去除机理为还原、吸附、络合共同作用,且其表面的有机基团能促进Cr(Ⅵ)的去除及增强BT-FeNPs的抗氧化性.
参考文献
| [1] | R.A. Crane;T.B.Scott.Nanoscale zero-valent iron: Future prospects for an emerging water treatment technology[J].Journal of hazardous materials,2012Apr.15(Apr.15):112-125. |
| [2] | 樊明德;袁鹏;何宏平;陈天虎;朱建喜;刘冬;郝娇.化学液相还原法制备零价铁纳米颗粒研究进展及展望[J].化工进展,2012(7):1542-1548,1580. |
| [3] | Mallikarjuna N. Nadagouda;Alicia B. Castle;Richard C. Murdock.In vitro biocompatibility of nanoscale zerovalent iron particles (NZVI) synthesized using tea polyphenols[J].Green chemistry,20101(1):114-122. |
| [4] | George E. Hoag;John B, Collins;Jennifer L. Holcomb.Degradation of bromothymol blue by 'greener' nano-scale zero-valent iron synthesized using tea polyphenols[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,200945(45):8671-8677. |
| [5] | T. Shahwan;S. Abu Sirriah;M. Nairat.Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes[J].Chemical engineering journal,20111(1):258-266. |
| [6] | Njagi, E.C.;Huang, H.;Stafford, L.;Genuino, H.;Galindo, H.M.;Collins, J.B.;Hoag, G.E.;Suib, S.L..Biosynthesis of iron and silver nanoparticles at room temperature using aqueous sorghum bran extracts[J].Langmuir: The ACS Journal of Surfaces and Colloids,20111(1):264-271. |
| [7] | Lanlan Huang;Xiulan Wenga;Zuliang Chen;Mallavarapu Megharaj;Ravendra Naidu.Synthesis of iron-based nanoparticles using oolong tea extract for the degradation of malachite green[J].Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy,2014:801-804. |
| [8] | Mohan Kumar, K.;Mandal, B.K.;Siva Kumar, K.;Sreedhara Reddy, P.;Sreedhar, B..Biobased green method to synthesise palladium and iron nanoparticles using Terminalia chebula aqueous extract[J].Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy,2013:128-133. |
| [9] | 付云芝;张永强.生物合成纳米晶的研究进展[J].中国材料进展,2011(3):47-53. |
| [10] | 徐玮;王利华;聂宁.不同温度和时间处理对茶多酚损失率的影响[J].中国农学通报,2009(2):6-8. |
| [11] | Li-na Shi;Xin Zhang;Zu-liang Chen.Removal of Chromium (VI) from wastewater using bentonite-supported nanoscale zero-valent iron[J].Water research: A journal of the international water association,20112(2):886-892. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%