全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

水滑石与磷酸银可见光催化剂的活性对比研究

Keywords: 水滑石结构,Ag3PO4,光催化

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文合成了具备水滑石结构(LDH)的Zn-CrLDH、Zn-TiLDH以及Ag3PO43种半导体光催化剂,并对它们的催化性能进行对比研究。XRD和SEM分析表明,Zn-CrLDH、Zn-TiLDH具有层状结构而Ag3PO4呈纳米球状结构。UV-Vis分析表明,Ag3PO4和Zn-CrLDH能够吸收可见光(>420nm)。在可见光照射与添加AgNO3作为电子受体的条件下,Zn-TiLDH几乎没有光催化活性,而Ag3PO4的光催化活性高于Zn-CrLDH。Ag3PO4在光解水实验中180min内氧气产量约1.2mL,而Zn-CrLDH约为0.65mL。光催化降解有机污染物实验中,在Ag3PO4催化作用下,120min内亚甲基蓝(MB)被完全降解,在240min内46%的对硝基酚(PNP)被降解,而Zn-CrLDH相应的去除率分别为61%和27%。

References

[1]  李越湘, 吕功煊, 李树本. 半导体光催化分解水研究进展. 分子催化, 2001,15(1):72-79
[2]  Kudo A., Omori K., Kato H. A novel aqueous process of preparation of crystal form-controlled and highly crystalline BiVO4 powder from layered vanadates at room temperature and its photocatalytic and photophysical properties. J. Am. Chem. Soc., 1999, 121(49): 11459-11467
[3]  Fujishima A., Honda K. Electrochemical photolysis of water at a semiconductor electrode. Nature, 1972, 238(5358): 37-38
[4]  Lee J., Ye H., Pan S., et al. Screening of photocatalysts by scanning electrochemical microscopy. Anal. Chem., 2008, 80(19): 7445-7450
[5]  胥利先, 桑丽霞, 马重芳, 等. 介孔InVO4光催化剂的合成及其光催化分解水的性能. 催化学报, 2006, 27(2): 100-102 Xu Lixian, Sang Lixia, Ma Chongfang, et al. Preparation of mesoporous InVO4 photocatalyst and its photocatalytic performance for water splitting. Chinese Journal of Catalysis, 2006, 27(2): 100-102(in Chinese)
[6]  高友良, 陈启元, 尹周澜, 等. O2/Ar气氛中仲钨酸铵热分解制备的WO3光催化分解水析氧活性. 中国有色金属学报, 2006, 16(5): 904-908 Gao Youliang, Chen Qiyuan, Yin Zhoulan, et al. Photocatalytic activity for O2 evolution of WO3 prepared through pyrolysis of ammonium paratungstate under O2/Ar atmosphere. The Chinese Journal of Nonferrous Metals, 2006, 16(5): 904-908(in Chinese)
[7]  Xu X., Lu R. J., Zhao X. F., et al. Fabrication and photocatalytic performance of a ZnxCd1-xS solid solution prepared by sulfuration of a single layered double hydroxide precursor. Appl. Catal. B: Environ., 2011, 102(1-2): 147-156
[8]  Lunawat P. S., Senapati S., Kumar R., et al. Visible light-induced splitting of water using CdS nanocrystallites immobilized over water-repellant polymeric surface. Int. J. Hydrogen Energy, 2007, 32(14): 2784-2790
[9]  Asahi R., Morikawa T., Ohwaki T., et al. Visible-light photocatalysis in nitrogen-doped titanium oxides. Science, 2001, 293(5528): 269-271
[10]  Khan S., Al-Shahry M., Ingler W. B. Efficient photochemical water splitting by a chemically modified n-TiO2. Science, 2002, 297(5590): 2243-2245
[11]  Irie H., Watanabe Y., Hashimoto K. Nitrogen-concentration dependence on photocatalytical activity of TiO2-xNx powders. J. Phys. Chem. B, 2003, 107(23): 5483-5486
[12]  Yu J. C., Yu J. G., Ho W. K., et al. Effects of F-doping on the photocatalytic activity and microstructures of nanocrystalline TiO2 powders. Chem. Mater., 2002, 14(9): 3808-3816
[13]  Silva C. G., Bouizi Y., Fornes V., et al. Layered double hydroxides as highly efficient photocatalysts for visible light oxygen generation from water. J.Am.Chem.Soc., 2009, 131(38): 13833-13839
[14]  Teruel L., Bouizi Y., Atienzar P., et al. Hydrotalcites of zinc and titanium as precursors of finely dispersed mixed oxide semiconductors for dye-sensitized solar cells. Energy & Environmental Science, 2010, 3(1): 154-159
[15]  Constantino V. R. L., Pinnavaia T. J. Basic properties of Mg2+1-xAlx3+ layered double hydroxides intercalated by carbonate, hydroxide, chloride, and sulfate anions. Inorg. Chem., 1995, 34(4): 883-892
[16]  Saber O., Tagaya H. New layered double hydroxide, Zn-Ti LDH: preparation and intercalation reactions. Inclusion Phenom. Macrocyclic Chem., 2003, 45(1-2): 109-116
[17]  Yi Z. G., Ye J. H., Kikugawa N., et al. An orthophosphate semiconductor with photooxidation properties under visible-light irradiation. Nature Materials, 2010, 9(7): 559-564
[18]  Thomas M., Ghosh S. K., George K. C. Characterisation of nanostructured silver orthophosphate. Mater. Lett., 2002, 56(4): 386-392

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133