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[1]宋俊达,陈洪龄.ZnO颗粒低温水热过程形貌控制和光活性研究[J].南京工业大学学报(自然科学版),2018,40(02):14-20.[doi:10.3969/j.issn.1671-7627.2018.02.003]
 SONG Junda,CHEN Hongling.Morphology control and photoactivity of ZnO particles synthesized with low temperature hydrothermal process[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(02):14-20.[doi:10.3969/j.issn.1671-7627.2018.02.003]
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ZnO颗粒低温水热过程形貌控制和光活性研究
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年02期
页码:
14-20
栏目:
出版日期:
2018-03-20

文章信息/Info

Title:
Morphology control and photoactivity of ZnO particles synthesized with low temperature hydrothermal process
文章编号:
1671-7627(2018)02-0014-07
作者:
宋俊达陈洪龄
南京工业大学 化工学院,江苏 南京 210009
Author(s):
SONG JundaCHEN Hongling
College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
ZnO形貌 三乙醇胺 低温水热法 光活性
Keywords:
morphology of zinc oxide triethanolamine hydrothermal method with low temperature photoactivity
分类号:
O0614.24+1
DOI:
10.3969/j.issn.1671-7627.2018.02.003
文献标志码:
A
摘要:
以二水合醋酸锌和三乙醇胺(TEA)为原材料,利用相对低温的水热法制备多种形貌、大尺寸的ZnO颗粒。通过X线衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和紫外-可见光吸收光谱仪(UV-Vis)对制备的样品进行表征。考察TEA用量、醋酸锌浓度、反应温度以及反应时间对ZnO形貌的影响,并讨论ZnO的生长机制。结果表明:制备的产物均为具有六方晶系纤锌矿结构的ZnO。取0.006 mol/L的TEA 0.25、0.5、1、1.5和2 mL,分别加入4 mL 0.8 mol/L醋酸锌溶液中,100 ℃水热反应8 h,对应合成了短六棱柱、六棱柱、纺锤状、双六棱锥及六棱锥状ZnO(长约8 μm,底面直径约5 μm)。醋酸锌浓度为0.4 mol/L时,加入2 mL TEA,100 ℃水热反应8 h制得平均粒径为4 μm的ZnO微球。在4 mL 0.8 mol/L醋酸锌溶液和1 mL TEA情况下,反应温度低于100 ℃时,合成的ZnO不具有孪晶结构; 水热反应时间达到8 h制得的ZnO才具有良好结晶度。考察了不同形貌ZnO光降解亚甲基蓝的活性,发现双六棱锥形貌ZnO的紫外-可见光吸收有蓝移现象,也表现出更好的光活性。
Abstract:
Large-scaled ZnO particles with different morphology were prepared successfully from triethanolamine(TEA)and zinc acetate dehydrate aqueous solution by relative low temperature hydrothermal reaction.The ZnO samples were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM)and UV-visible absorption spectroscopy(UV-Vis).The influences of TEA dosage,concentration of zinc acetate,hydrothermal temperature and hydrothermal time on the morphology of ZnO were discussed,and a possible growth mechanism of large-scaled ZnO particles was tentatively proposed.Results indicated that the products were single phase ZnO with hexagonal wurtzite structure.4 mL 0.8 mol/L zinc acetate aqueous solution was added to 0.25,0.5,1,1.5 and 2 mL 0.006 mol/L TEA solution respectively,and short hexagonal prism-like,hexagonal prism-like,spindly,double hexagonal pyramid-like and hexagonal pyramid-like(a length of 8 μm,diameter of 5 μm)ZnO particles were synthesized correspondingly with low temperature hydrothermal process at 100 ℃ for 8 h.ZnO microspheres with 4 μm diameter were synthesized when 4 mL 0.4 mol/L zinc acetate solution mixed with 2 mL 0.006 mol/L TEA solution under the same hydrothermal condition.In case of mixing 4 mL 0.8 mol/L zinc acetate with 1 mL 0.006 mol/L TEA solution,ZnO particles with high symmetrical twinned structure were not occurred as the reaction temperature lower less than 100 ℃ and well crystallinity formed as the reaction time reached to 8 h.The degradation of methylene blue at the presence of ZnO with different morphologies was also investigated.The UV-Vis absorption spectra showed that the absorption peak of double hexagonal pyramid-like ZnO had blue-shifted,and it had much higher degradation rates of methylene blue compared with other ZnO samples.

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备注/Memo

备注/Memo:
收稿日期:2016-07-13
作者简介:宋俊达(1992—),男,陕西泾阳人,硕士,主要研究方向为纳米ZnO材料制备及其应用; 陈洪龄(联系人),教授,E-mail:hlchen@njtech.edu.cn.
引用本文:宋俊达,陈洪龄.ZnO颗粒低温水热过程形貌控制和光活性研究[J].南京工业大学学报(自然科学版),2018,40(2):14-20..
更新日期/Last Update: 2018-03-30