Cu2O/TiO2 heterostructure nanotube arrays prepared by an electrodeposition method exhibiting enhanced photocatalytic activity for CO2 reduction to methanol
Cu2O/TiO2 heterostructure nanotube arrays prepared by an electrodeposition method exhibiting enhanced photocatalytic activity for CO2 reduction to methanol
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电沉积法制备的 Cu2O/TiO2 异质结构纳米管阵列对 CO2 还原成甲醇表现出增强的光催化活性
DOI：
10.1016/j.catcom.2013.11.011
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发表时间：
2014-02
影响因子：
3.7
通讯作者：
Chang, Xiaofeng
中科院分区：
文献类型：
--
作者：
Ji, Guangbin;Liu, Yousong;Gondal, M. A.;Chang, Xiaofeng
采用电沉积法将p型Cu 2 O包覆到n型TiO 2纳米管阵列（TNT）中，制备了具有更高光催化性能的Cu 2 O/TiO 2复合纳米管阵列。结果表明，Cu 2 O纳米粒子包覆了TNT纳米粒子，UV-Vis吸收光谱表明，Cu 2 O/TNT纳米粒子比纯TNT纳米粒子具有更好的可见光吸收能力。利用Cu 2 O/TNT纳米复合材料进行的CO2光催化还原实验表明，Cu 2 O/TNT纳米复合材料具有很高的光催化活性，而纯TNT阵列几乎没有活性。此外，Cu 2 O/TNT在可见光照射下对酸性橙子（AO）等目标有机污染物的降解也表现出增强的活性。Cu 2 O/TNTs在CO2还原和有机污染物降解中的超增强光催化活性可归因于Cu 2 O/TiO 2异质结构的形成，具有更高的电荷分离效率。
Cu2O/TiO2composite nanotube arrays demonstrating enhanced photocatalytic performance were synthesized using an electrodeposition method to impregnate the p-type Cu2O into the n-type titanium dioxide nanotube arrays (TNTs). The morphological results confirmed that the TNTs are wrapped by the Cu2O nanoparticles and the UV–Vis absorption spectra showed that the Cu2O/TNTs display a better ability for visible light absorption compared to the pure TNTs. CO2photocatalytic reduction experiments carried out by using Cu2O/TNT nanocomposites proved that Cu2O/TNTs exhibit high photocatalytic activity in conversion of CO2to methanol, while pure TNT arrays were almost inactive. Furthermore, Cu2O/TNTs also exhibited augmented activity in degradation of target organic pollutant like acid orange (AO) under visible light irradiation. The ultra enhanced photocatalytic activity noticed by using Cu2O/TNTs in CO2reduction and degradation of organic pollutant could be attributed to the formation of Cu2O/TiO2heterostructures with higher charge separation efficiency.
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