Morphologies of ZnO Crystals Synthesized by Hydrothermal Method

Abstract:

In this paper , the ZnO crystal was synthesized using hydrothermal method through 24 hours^' reaction with 35 % filling factor at 430°C. When the mineralizer concentration is rather low (eg. lmol/L NaOH), only ZnO microcrystal is produced. The mineralizer concentration increases, the larger crystal was present. When 5 mol·L^-1 NaOH served as mineralizer, the extent of the synthesized crystal was nearly 500μm. The ZnO cryslals with length of 1500μm were present when 3ml·L^-1 KOH served as mineralizer. Respectively when 3mol·L^-1 NaOH and lmol·L^-1 KBr were used as mineralizer, the extent of the synthesized crystal was nearly 700μm , the diameter was 200μm and the exposed faces m { 100} , p { 101 } was complete , so we obtained the higher quality crystals. Besides the larger crystal, a great deal of microcrystal and nanocrystallites cluster was also present in the product.

• Periodical: Applied Mechanics and Materials (Volumes 313-314)
• Pages: 193-197
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.313-314.193
• Online since: March 2013
• Authors: Wen Li Zheng, Wei Yang
• Keywords: Crystal Morphology, Hydrothermal Synthesis, Mineralizer, ZNO

References

[1] Bagnall D M, Chen Y F, Zhu Z, etal: Appl. Phys. Lett. Vol. 70(17) (1997),pp.2230-2232

[2] Tang Z K,Wang G K and Yu P: Appl. Phys. Lett. Vol. 72(25) (1998),pp.3270-3272

[3] Bagnall D M, Chen Y F, Zhu Z, etal: Appl. Phys. Lett. Vol. 73(8) (1998),pp.1038-1041

[4] Garces N Y, Wang L, Bai L, etal: Appl. Phys. Lett. Vol. 18(4)(2002),pp.622-624

[5] Jing L Q, Sun X, Xu Z L, etal: Chin Jour of Cata Vol. 23(1) (2002),pp.37-40

[6] Hou T Ng, Jun Li, Michael K Smith, etal: Science Vol. 300(23) (2003),p.1249

[7] Huang Michael H, Mao Samuel, Feick Henning, etal: Science Vol. 292(8) (2001),pp.1897-1899

[8] Yan Haoquan, He Rongrui, Juhnson Justin, etal: J Am Chem Soc Vol. 125(16(2003)), pp.4728-4729

[9] Hua S K,Zhong W Z:. J Synt Crys Vol. 23(3) (1994),pp.177-180

[10] Liu B, Zeng H C: J Am Chem Soc Vol. 125(1) (2003),pp.4430-4431

[11] Gao L, Ji L, Xu H,etal: J Am Chem Soc Vol. 124(50) ( 2002),pp.4864-4865

[12] Urbieta A, Femandez P, Piqueras J, eta:l. J Phys D:Appl Phys Vol. 34(7)(2001),pp.2945-2949

[13] Sekiguchi T, Miyashita S, Obara K, etal: J of Crysal Growth Vol. 214-215( 2000),pp.72-76

[14] Eriko Ohshima, etal: J of Crysal Growth Vol. 260(2004),p.166

[15] Florescu D I,Mourokh L G, Pollak F H,etal: J Appl Phys Vol. 91(2) ( 2002),pp.890-892

[16] Wei Z R, Dong G Y,Wang L M,etal: Chin Jour of Lumi Vol. 24(4) (2003),pp.353-357