pH对电沉积氧化亚铜薄膜的影响及光催化性能

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%。

Effect of pH on electrodeposition of cuprous oxide film and its photocatalytic property

Cu 2 O thin films were electrodeposited at different pHs from an electrolyte containing 0.083 mol/L Cu(CH 3 COO) 2 ·H 2 O and 0.22 mol/L lactic acid with conductive glass as cathode.The effect of electrolyte pH on the preferred orientation and morphology of Cu 2 O film was studied.The results showed that Cu 2 O thin film with different preferred orientations and morphologies can be obtained by adjusting electrolyte pH.The light absorption ability of the Cu 2 O thin films prepared at pH 7-13 are excellent.A Cu 2 O thin film with (111) orientation,strong adhesion,high photocatalytic ability,and good stability can be obtained at a pH of 11.The type of crystal face of Cu 2 O thin film greatly influences its photocatalytic ability.The Cu 2 O thin film with (111) orientation has the best photocatalytic ability,and has a degradation rate of Rhodamine B up to 63% after reaction for 2.5 h.