Department of Materials Science, State Key Laboratory of Automotive Simulation and Control, and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012, People's Republic of China.
Sci Rep. 2017 Jan 10;7:39695. doi: 10.1038/srep39695.
Non-noble metal nanoparticles are becoming more and more important in catalysis recently. Cu/CuO nanoclusters on highly ordered TiO nanotube arrays are successfully developed by a surfactant-free photoreduction method. This non-noble metal Cu/CuO-TiO catalyst exhibits excellent catalytic activity and stability for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with the presence of sodium borohydride (NaBH). The rate constant of this low-cost Cu/CuO based catalyst is even higher than that of the noble metal nanoparticles decorated on the same TiO substrate. The conversion efficiency remains almost unchanged after 7 cycles of recycling. The recycle process of this Cu/CuO-TiO catalyst supported by Ti foil is very simple and convenient compared with that of the common powder catalysts. This catalyst also exhibited great catalytic activity to other organic dyes, such as methylene blue (MB), rhodamine B (RhB) and methyl orange (MO). This highly efficient, low-cost and easily reusable Cu/CuO-TiO catalyst is expected to be of great potential in catalysis in the future.
近年来，非贵金属纳米粒子在催化领域变得越来越重要。通过无表面活性剂的光还原法，成功地在高度有序的 TiO 纳米管阵列上制备了 Cu/CuO 纳米团簇。这种非贵金属 Cu/CuO-TiO 催化剂在硼氢化钠（NaBH）存在下，对 4-硝基苯酚（4-NP）还原为 4-氨基酚（4-AP）表现出优异的催化活性和稳定性。这种基于低成本 Cu/CuO 的催化剂的反应速率常数甚至高于相同 TiO 载体上负载的贵金属纳米粒子。经过 7 次循环回收后，转化率几乎保持不变。与常见的粉末催化剂相比，Ti 箔负载的 Cu/CuO-TiO 催化剂的回收过程非常简单方便。该催化剂对其他有机染料，如亚甲基蓝（MB）、罗丹明 B（RhB）和甲基橙（MO）也表现出很高的催化活性。这种高效、低成本且易于重复使用的 Cu/CuO-TiO 催化剂有望在未来的催化领域具有巨大的潜力。
