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首页> 外文期刊>RSC Advances >Modified graphene supported Ag-Cu NPs with enhanced bimetallic synergistic effect in oxidation and Chan-Lam coupling reactions
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Modified graphene supported Ag-Cu NPs with enhanced bimetallic synergistic effect in oxidation and Chan-Lam coupling reactions

机译：改性石墨烯支持Ag-Cu NPS，具有增强的氧化双金属协同效应和Chan-in偶联反应

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摘要

Herein, well dispersed Ag-Cu NPs supported on modified graphene have been synthesizedviaa facile and rapid approach using sodium borohydride as a reducing agent under ambient conditions. Dicyandiamide is selected as an effective nitrogen source with TiO(2)as an inorganic material to form two kinds of supports, labelled as TiO2-NGO and NTiO2-GO. Initially, the surface area analysis of these two support materials was carried out which indicated that N-doping of GO followed by anchoring with TiO(2)has produced support material of larger surface area. Using both types of supports, ten nano-metal catalysts based on Ag and Cu were synthesized. Benefiting from the bimetallic synergistic effect and larger specific surface area of TiO2-NGO, Cu@Ag-TiO2-NGO is found to be a highly active and reusable catalyst out of other synthesized catalysts. It exhibits excellent catalytic activity for oxidation of alcohols and hydrocarbons as well as Chan-Lam coupling reactions. The nanocatalyst is intensively characterized by BET, SEM, HR-TEM, ICP-AES, EDX, CHN, FT-IR, TGA, XRD and XPS.
机译：在此，在改性石墨烯上负载的良好分散的Ag-Cu nps已经合成了诸如在环境条件下作为还原剂的硼氢化钠作为还原剂的综合性和快速的方法。选择双氰胺作为具有TiO（2）的有效氮源，作为无机材料，以形成两种载体，标记为TiO2-Ngo和Ntio2-Go。最初，进行了这两个载体材料的表面积分析，表明通过TiO（2）锚固后的N-掺杂，并产生了较大的表面积的支撑材料。使用两种类型的载体，合成基于Ag和Cu的10个基于Ag和Cu的纳米金属催化剂。从TiO 2的非政府组织，铜@的Ag-TiO 2的非政府组织的双金属协同效应，更大的比表面积有利于被发现是高活性的且可重复使用的催化剂出其他合成催化剂。它表现出优异的催化活性，用于氧化醇和烃以及Chan-LAN偶联反应。纳米催化剂通过BET，SEM，HR-TEM，ICP-AES，EDX，CHN，FT-IR，TGA，XRD和XPS进行强烈表征。

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