以硅藻为模板合成TiO2微胶囊及其可见光催化性能
Fabrication of TiO2 Capsules Using Diatoms as a Template and Their Photocatalytic Performance
摘 要
通过仿生方法, 以羽纹硅藻为模板, 经钛盐溶液浸渍、煅烧去除模板后制得直径为10 μm左右的多孔TiO2微胶囊, 研究了多孔TiO2微胶囊的结构特性以及其在可见光下降解亚甲基蓝溶液的催化性能。结果表明: 煅烧后得到的多孔TiO2微胶囊具有多孔结构和较大的比表面积, 并含有部分生物遗留下的氮元素; 多孔结构及氮元素的掺杂使得多孔TiO2微胶囊具有优良的可见光催化降解亚甲基蓝效果。
硅藻
光催化降解
TiO2
氧空位
biotemplate
diatom
photocatalytic degradation
TiO2
oxygen vacancy
Abstract
Porous TiO2 capsules in diameters of 10 μm were obtained through a simple infiltration of titanium salt followed by calcination process. Microstructure characteristics of TiO2 capsules and its degradation performance of methylene blue in visible light were also studied. The results revealed that the prepared TiO2 capsules possessed porous structure, large specific surface area and nitrogen left by diatom. The enhancement in photocatalytic degradation performance of methylene blue could be attributed to the doped nitrogen contained in the original diatom and porous structure.
中图分类号 O611.4 DOI 10.11973/jxgccl201506010
所属栏目 新材料新工艺
基金项目
收稿日期 2014/2/21
修改稿日期 2015/1/30
网络出版日期
作者单位点击查看
备注陈志刚(1955—), 男, 江苏高邮人, 教授, 硕士。
引用该论文: CHEN Zhi-gang,ZHANG Yu-zhu,QIAN Jun-chao,WANG Meng-meng,LU Qiu-yue. Fabrication of TiO2 Capsules Using Diatoms as a Template and Their Photocatalytic Performance[J]. Materials for mechancial engineering, 2015, 39(6): 48～52
陈志刚,张玉珠,钱君超,王盟盟,陆秋月. 以硅藻为模板合成TiO2微胶囊及其可见光催化性能[J]. 机械工程材料, 2015, 39(6): 48～52
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参考文献
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【2】YANG D, QI L, MA J. Eggshell membrane templating of hierarchically ordered macroporous networks composed of TiO2 tubes[J]. Advanced Materials, 2002, 14(21): 1543-1546.
【3】王炜, 陈志刚, 陈丰. 以鱼鳞为模板合成仿生氧化铈及其性能[J]. 机械工程材料, 2012, 36 (12): 17-20.
【4】MACEDO J S, OTUBO L, FERREIRA O P. Biomorphic activated porous carbons with complex microstructures from lignocellulosic residues[J]. Microporous and Mesoporous Materials, 2008, 107(3): 276-285.
【5】GALUSHA J W, JORGENSEN M R, BARTL M H. Diamond-structured titania photonic-bandgap crystals from biological templates[J]. Advanced Materials, 2010, 22(1): 107-110.
【6】QIAN J, CHEN F, ZHAO X. China rose petal as biotemplate to produce two-dimensional ceria nanosheets[J]. Journal of Nanoparticle Research, 2011, 13(12): 7149-7158.
【7】ZHAO K, CHANG Q, CHEN X. Synthesis and application of DNA-templated silver nanowires for ammonia gas sensing[J]. Materials Science and Engineering: C, 2009, 29(4): 1191-1195.
【8】CHOW S, FAN T, DING J. Meso/macroporous ceria with enhanced surface oxygen activity via plant-leaf mineralization[J]. Journal of the American Ceramic Society, 2010, 93(1): 40-43.
【9】LI X, FAN T, ZHOU H. Enhanced light-harvesting and photocatalytic properties in morph-TiO2 from green-leaf biotemplates[J]. Advanced Functional Materials, 2009, 19(1): 45-56.
【10】COHEN-HADAR N, LAGZIEL-SIMIS S, WINE Y. Re-structuring protein crystals porosity for biotemplating by chemical modification of lysine residues[J].Biotechnology and Bioengineering, 2011, 108(1): 1-11.
【11】SHEN J, YAN B, SHI M. One step hydrothermal synthesis of TiO2-reduced graphene oxide sheets[J]. Journal of Materials Chemistry, 2011, 21(10): 3415-3421.
【12】FLAHERTY D W, DOHNáLEK Z, DOHNáLKOVá A. Reactive ballistic deposition of porous TiO2 films: growth and characterization[J]. The Journal of Physical Chemistry: C, 2007, 111(12): 4765-4773.
【13】OZASA K, NEMOTO S, LI Y. Contact angle and biocompatibility of sol-gel prepared TiO2 thin films for their use as semiconductor-based cell-viability sensors[J]. Surface and Interface Analysis, 2008, 40(3/4): 579-583.
【14】WANG T H, NAVARRETE-LOPEZ A M, LI S.Hydrolysis of TiCl4: initial steps in the production of TiO2[J].The Journal of Physical Chemistry: A, 2010, 114(28): 7561-7570.
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