以鳞片石墨为原料，用浓硝酸对其插层后膨胀制备出膨胀石墨，以滚压振动磨预处理的超细微锌粉为锌源，以蒸馏水和无水乙醇作为分散剂，经30 kHz的超声波处理8 h 即得到复合结构良好的石墨烯-氧化锌纳米棒复合光催化剂(ZnO/G)，考察了锌粉和膨胀石墨不同比例对复合材料光催化性能的影响。采用 X 射线衍射仪(XRD )、激光拉曼仪(Ra-man)、场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)和紫外-可见光谱分析仪(UV-Vis)等测试手段对复合光催化剂进行表征，结果表明，复合材料中的氧化锌纳米棒呈现出六方晶系纤锌矿结构，并均匀覆盖在石墨烯表面上，其直径大约为20 nm。不同比例制得的复合材料对甲基橙的降解效率差别较大，其中锌粉为1.0 g时，复合材料的光催化性能明显优于等量的氧化锌纳米棒材料。
In this work,expanded graphite was prepared from natural flake graphite with concentrated nitric acid.Zinc processed by mechanical milling and expanded graphite were dispersed in the distilled water and etha-nol.Then,they were processed via ultrasonic of 30 kHz by eight hours to synthesize series of composites,con-sisting of ZnO nanorod and graphene(ZnO/G)with an excellent structure.The influence of different proportion of zinc and expanded graphite on the photocatalytic activity of ZnO/G composites was studied.The photocata-lysts were characterized by XRD,Raman,SEM,TEM and UV-Vis absorbance spectroscopy.The results re-vealed that ZnO synthesized by ultrasonic was short rod-like with the wurzite hexagonal structure and grows on the surface of graphene equably.The diameter of ZnO nanorod was about 20 nm.The degradation rate of meth-yl-orange by ZnO/G composites prepared by different proportions varied greatly.The photocatalytic activity of ZnO/G composites was prior to ZnO when the content of zinc in reactant was 1 .0 g.
参考文献
| [1] | 曹培江,林传强,曾玉祥,柳文军,贾芳,朱德亮,马晓翠,吕有明.氧气流量对脉冲激光沉积ZnO薄膜的形貌及光学性质影响[J].发光学报,2010(02):239-242. |
| [2] | 高小奇,郭志友,张宇飞,曹东兴.Al-N共掺杂ZnO电子结构和光学性质[J].发光学报,2010(04):509-514. |
| [3] | Zhao Yanmin;Zhang Jiying;Zhang Xiyan et al.A back-illuminated Au/ZnO/Al shottky UV photodetector[J].Chinese Journal of Luminescence,2010,31(04):527-530. |
| [4] | Peng Feng;Chen Shuihui;Zhang Lei et al.Preparation of visible-light response nano-sized ZnO film and its pho-tocatalytic degradation to methyl orange[J].Acta Phys Chim Sin,2005,21(09):944-948. |
| [5] | 井立强,郑莹光,徐自力,董凤霞,孙晓君,蔡伟民,徐英凯.ZnO超微粒子的EPR特性和光催化性能[J].高等学校化学学报,2001(11):1885-1888. |
| [6] | Xue B.;Hong Q.;Lin JY.;Tan KL.;Chen P. .Growth of Pd, Pt, Ag and Au nanoparticles on carbon nanotubes[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(9):2378-2381. |
| [7] | Tsukasa T;Shigeyoshi I;Susumu K et al.Effects of adsorbents used as supports for titanium dioxide loading on photocatalytic degradation of propyzamide[J].Environmental Science and Technology,1996,30:1275-1281. |
| [8] | Yao Jimin;Yan Xin;Lu Guang et al.Patterning colloi-dal crysatls by lift-up soft lithography[J].Advanced Ma-terials,2004,16(01):81-84. |
| [9] | 蒋保江,王鹏飞,侯宗伟,乔英杰,付宏刚.膨胀石墨层间生长高活性氧化锌及其光催化性能[J].高等学校化学学报,2012(11):2544-2548. |
| [10] | Dongying Fu;Gaoyi Han;Yunzhen Chang;Jianhua Dong .The synthesis and properties of ZnO-graphene nano hybrid for photodegradation of organic pollutant in water[J].Materials Chemistry and Physics,2012(2/3):673-681. |
| [11] | Zhang, H.;Lv, X.;Li, Y.;Wang, Y.;Li, J. .P25-graphene composite as a high performance photocatalyst[J].ACS nano,2010(1):380-386. |
| [12] | Geim AK;Novoselov KS .The rise of graphene[J].Nature materials,2007(3):183-191. |
| [13] | Wang Shulin .Rolling vibration grinding machine[P].CN 99112092.2,2000-08-23. |
| [14] | Wang Shulin.Impact chaos control and stress release -A key for development of ultra fine vibration milling[J].自然科学进展(英文版),2002(05):336-341. |
| [15] | WANG Shulin,LI Shengjuan,DU Yanchen,XU Bo,LI Laiqiang,ZHU Yan.Nanostructural evolution of Zn by dry roller vibration milling at room temperature[J].自然科学进展（英文版）,2006(04):441-444. |
| [16] | Zhao Lifeng;Wang Shulin;Xia Lizhen et al.Sythesis of Zn/ZnO nano-composite and its dark room catalytic effect[J].Journal of Functional Materials,2013,44(08):1106-1109. |
| [17] | Yang Lihua;Zhai Tongyu;Feng Shuo et al.Prepara-tion of sulfur-free and expandable graphite[J].Journal of Agricultural University of Hebei,2000,23(03):107-108. |
| [18] | Ni Zhenhua;Wang Yingying;Yu Ting et al.Raman spectroscopy and imaging of graphene[J].Nano Res,2008,1:273-291. |
| [19] | Feng Li;Yong Ding;Puxian Gao;Xinquan Xin;Zhong L.Wang .Single-Crystal Hexagonal Disks and Rings of ZnO:Low-Temperature,Large-Scale Synthesis and Growth Mechanism[J].Angewandte Chemie,2004(39):5238-5242. |
| [20] | 固体颗粒对超声空化场的影响[J].化学工业与工程,2013(01):59-66. |
| [21] | Tuziuti T;Yasui K;Sivakumar M;Iida Y;Miyoshi N .Correlation between acoustic cavitation noise and yield enhancement of sonochemical reaction by particle addition[J].The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory,2005(21):4869-4872. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%