(1. 浙江師范大學(xué) 物理化學(xué)研究所 浙江省固體表面反應(yīng)化學(xué)重點實驗室，金華 321004；
2. 金華教育學(xué)院 生化系，金華 321000)
摘 要: 在高度陰極極化條件下，以析氫氣泡為動態(tài)模板，電沉積制備微/納米多孔鋅薄膜，經(jīng)加熱氧化制備得到微/納米多孔氧化鋅薄膜。研究電流密度、鍍液組成和溫度對多孔金屬鋅薄膜孔徑大小和孔壁形貌的影響。結(jié)果表明：通過改變電流密度、鍍液組成和溫度，可調(diào)控孔徑大小和孔壁結(jié)構(gòu)；在30 ℃的0.05 mol/L ZnSO4和2 mol/L NH4Cl溶液中，電流密度為0.3~0.8 A/cm2時，可得到主孔徑約為50~100 μm的多孔鋅薄膜，形成孔壁的枝晶由大小為100~300 nm的顆粒構(gòu)成；在空氣氣氛下經(jīng)350 ℃加熱1 h、450 ℃加熱2 h氧化處理后，多孔鋅薄膜轉(zhuǎn)變?yōu)榫哂邢嗨莆?納米多孔結(jié)構(gòu)的氧化鋅薄膜，并顯示出優(yōu)異的光催化降解羅丹明B的性能。
關(guān)鍵字: 微/納米結(jié)構(gòu)；多孔薄膜；氧化鋅；光催化
（1. Zhejiang Key Laboratory for Chemistry on Solid Surfaces, Institute of Physical Chemistry,
Zhejiang Normal University, Jinhua 321004, China;
2. Department of Chemistry and Biology, Jinhua Education College, Jinhua 321000, China）
Abstract:Micro/nano-structured porous ZnO films were obtained by heating porous Zn films electrodeposited using hydrogen bubbles as templates at higher cathodic polarization. The influence of deposition parameters, including current density, concentration of ZnSO4 and NH4Cl, and temperature of the electrolyte on the morphologies and structures of the porous Zn films was systematically studied. The results show that the size of the pores and the morphologies of the pore walls can be easily tuned by controlling the electrodeposition parameters. The Zn films with the major pores of 50−100 μm and dendritic crystallines made up of particles with 100−300 nm in the pore walls can be obtained in the solution of pH 5 containing 0.05 mol/L ZnSO4, 2.0 mol/L NH4Cl at 30 ℃ and current densities of 0.3−0.8 A/cm2. The micro/nano- structured porous ZnO films are prepared by heating the porous Zn films in air at 350 ℃ for 1 h following by at 450 ℃ for 2 h. And the better photocatalytic activity for photocatalytic degradation of rhodamine B is demonstrated.
Key words: micro/nano structure; porous films; zinc oxide; photocatalysis
