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以导电玻璃为阴极,在不同pH下,从含有0.083mol/LCu(CH3COO)2·H2O、0.22mol/L乳酸的电解液中电沉积合成Cu2O薄膜。研究了电解液pH对Cu2O薄膜晶体择优取向和形貌的影响。结果表明,通过调节电解液pH可合成不同择优取向和形貌的Cu2O薄膜,在pH为7～13内合成的Cu2O薄膜均具有较好的光吸收性。pH=11时,可制得具有(111)取向、结合力强、光催化活性高和稳定性好的Cu2O薄膜。Cu2O薄膜的晶面类型对薄膜催化能力有较大影响,(111)择优取向的Cu2O薄膜的光催化活性最高,反应2.5h后罗丹明B的降解率可达63%。
Cu2O films were electrodeposited from electrolytes containing 0.083 mol / L Cu (CH3COO) 2 · H2O, 0.22 mol / L lactic acid at different pHs using conductive glass as cathode. The effect of electrolyte pH on the preferred orientation and morphology of Cu2O thin films was investigated. The results show that Cu2O films with different orientation and morphology can be synthesized by adjusting the pH of the electrolyte. Cu2O films synthesized at pH 7 ~ 13 have good optical absorption. When pH = 11, a Cu2O film with (111) orientation, strong binding, high photocatalytic activity and good stability can be obtained. The type of Cu2O film has a significant influence on the photocatalytic activity of the films. The photocatalytic activity of Cu2O films with (111) preferred orientation is the highest, and the degradation rate of Rhodamine B is 63% after 2.5 hours.