Manna Joydeb, Vinod T P, Flomin Kobi, Jelinek Raz
Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
J Colloid Interface Sci. 2015 Dec 15;460:113-8. doi: 10.1016/j.jcis.2015.08.053. Epub 2015 Aug 24.
Growth of metal domains on semiconductor nanoparticles is known to enhance their photocatalytic properties. We prepared ZnO nanoparticles decorated with metallic Au domains through a new one-pot microwave-based strategy. The synthetic route utilized microwave-heating of a mixture of only three components: Zn(2+) salt, Au(SCN)4(-) which served as a precursor for metallic gold, and Tris base. The Tris molecules had a dual role in the process, both shaping the morphology of the ZnO particles, as well as constituting docking and nucleation sites for the Au(SCN)4(-) ions. The Au complex subsequently underwent spontaneous crystallization/reduction without co-addition of reducing or stabilizing agents, yielding Au nanoparticles attached to the ZnO surface. We show that the hybrid Au/ZnO nanoparticles exhibited enhanced photocatalytic properties compared to the plain ZnO nanoparticles.
已知半导体纳米颗粒上金属域的生长会增强其光催化性能。我们通过一种基于微波的新型一锅法策略制备了装饰有金属金域的氧化锌纳米颗粒。合成路线利用仅对三种成分的混合物进行微波加热：锌（2+）盐、用作金属金前体的四硫氰酸金（-）和三羟甲基氨基甲烷碱。三羟甲基氨基甲烷分子在该过程中具有双重作用，既塑造了氧化锌颗粒的形态，又构成了四硫氰酸金（-）离子的对接和成核位点。随后，金络合物在不添加还原剂或稳定剂的情况下自发结晶/还原，生成附着在氧化锌表面的金纳米颗粒。我们表明，与普通氧化锌纳米颗粒相比，金/氧化锌混合纳米颗粒表现出增强的光催化性能。
