以Zn(AC)2·2H2O为原料,NH3·H2O为络合剂,在NaBH4辅助下140℃水热反应2h制备出ZnO纳米棒自组装的海胆形结构.采用X射线衍射仪、扫描电镜和透射电镜对产物进行表征.结果表明,海胆形ZnO结构的直径约为3～17μm,它是由直径约为100 nm,长度约为500 nm～3μm范围的ZnO纳米棒自组装而成.提出了ZnO纳米棒自组装海胆形结构的可能生长机理.NaBH4与溶液中的少量H+结合生成H2气泡,ZnO纳米晶吸附在H2的气液界面形成了纳米颗粒自组装的微球,随着反应时间的延长,组装成微球的ZnO纳米颗粒沿[0001]方向取向生长成ZnO纳米棒,最终形成ZnO纳米棒自组装的海胆形颗粒.室温下以海胆形ZnO纳米结构和ZnO纳米棒为光催化剂,以偶氮染料甲基橙作为光催化研究对象,紫外光照70 min,对甲基橙的降解率分别为97％和67％.
参考文献
| [1] | Bin Liu;Hua Chun Zeng .Fabrication of ZnO"Dandelions"via a Modified Kirkendall Process[J].Journal of the American Chemical Society,2004(51):16744-16745. |
| [2] | Xingfu Zhou;Shuyi Chen;Danyu Zhang;Xuefeng Guo;Weiping Ding .Microsphere Organization of Nanorods Directed by PEG Linear Polymer[J].Langmuir: The ACS Journal of Surfaces and Colloids,2006(4):1383-1387. |
| [3] | Jing Yu Lao;Jian Guo Wen;Zhi Feng Ren .Hierarchical ZnO Nanostructures[J].Nano letters,2002(11):1287-1291. |
| [4] | Wang ZL .Zinc oxide nanostructures: growth, properties and applications[J].Journal of Physics. Condensed Matter,2004(25):R829-R858. |
| [5] | Lao C S;Gao P X;Yang R S et al.Formation of double-side teethed nanocombs of ZnO and self-catalysis of Zn-terminated polar surface[J].Chemical Physics Letters,2005,417(4-6):359-363. |
| [6] | Pu Xian Gao;Zhong L. Wang .Nanopropeller arrays of zinc oxide[J].Applied physics letters,2004(15):2883-2885. |
| [7] | He JH;Hsu JH;Wang CW;Lin HN;Chen LJ;Wang ZL .Pattern and feature designed growth of ZnO nanowire arrays for vertical devices[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(1):50-53. |
| [8] | Maosong Mo;Jimmy C. Yu;Lizhi Zhang;Siu-Kong A. Li .Self-Assembly of ZnO Nanorods and Nanosheets into Hollow Microhemispheres and Microspheres[J].Advanced Materials,2005(6):756-760. |
| [9] | Gao SY;Zhang HJ;Wang XM;Deng RP;Sun DH;Zheng GL .ZnO-based hollow microspheres: Biopolymer-assisted assemblies from ZnO nanorods[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(32):15847-15852. |
| [10] | Claudia Pacholski;Andreas Kornowski;Horst Weller .Self-Assembly of ZnO: From Nanodots to Nanorods[J].Angewandte Chemie International Edition,2002(7):1188-1191. |
| [11] | Lu, F;Cai, WP;Zhang, YG .ZnO hierarchical micro/nanoarchitectures: Solvothermal synthesis and structurally enhanced photocatalytic performance[J].Advanced Functional Materials,2008(7):1047-1056. |
| [12] | Deng Z W;Chen M;Gu G X et al.A facile method to fabricate ZnO hollow spheres and their photocatalytic property[J].Journal of Physical Chemistry B,2008,112:16-22. |
| [13] | Hongqiang Wang;Guanghai Li;Lichao Jia .Controllable Preferential-Etching Synthesis and Photocatalytic Activity of Porous ZnO Nanotubes[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2008(31):11738-11743. |
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%