Green synthesis of glucose-reduced graphene oxide supported Ag-Cu2O nanocomposites for the enhanced visible-light photocatalytic activity
Green synthesis of glucose-reduced graphene oxide supported Ag-Cu2O nanocomposites for the enhanced visible-light photocatalytic activity
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DOI：
10.1016/j.compositesb.2017.11.021
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发表时间：
2018-04-01
影响因子：
13.1
通讯作者：
Lee, Joong Hee
中科院分区：
文献类型：
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作者：
Sharma, Kamaldeep;Maiti, Kakali;Lee, Joong Hee
以葡萄糖还原氧化石墨烯(RGO)为载体，采用本尼迪克特溶液和葡萄糖溶液为原料，在室温下合成了具有良好稳定性和可见光催化活性的银-Cu2O三元纳米复合材料(NCS)，无需任何有毒试剂、表面活性剂或任何特殊处理。除了温和的GO还原能力外，葡萄糖还能诱导rGO片层的官能化，防止还原片层的聚集，并为Cu2O提供原位稳定。所制得的Ag-Cu2O/rGO纳米管对甲基橙(MO)具有良好的光催化降解效率，且降解率高于原始的Cu2O和Cu2O/rGO纳米管。此外，首次发现Ag-Cu2O/rGO纳米碳管对苯酚溶液的光催化降解效率显著提高，这主要归功于其较高的电子注入速率和电子空穴对的有效分离。因此，本策略探索了利用无害试剂简便地合成各种Cu2O基纳米复合材料的方法及其可行的应用。
Ternary nanocomposites (NCs) comprising Ag-Cu2O supported on glucose-reduced graphene oxide (rGO) with enhanced stability and visible light photocatalytic activity were synthesized via a facile and green approach using Benedict's solution and glucose solution at room temperature without the need of any toxic reagent, surfactant or any special treatment. Besides mild reducing capability to GO, glucose also induces the functionalization of rGO sheets, preventing the aggregation of reduced sheets and providing in situ stabilization to Cu2O. The resulting Ag-Cu2O/rGO NCs showed excellent photocatalytic efficiency for the photodegradation of methyl orange (MO), and the degradation rate was found to be higher than the pristine Cu2O and Cu2O/rGO NCs. Further, for the first time Ag-Cu2O/rGO NCs showed markedly enhanced photocatalytic efficiency for the photodegradation of phenol solution which is mainly attributed to its high electron injection rate and effective separation of electron hole pairs. Thus, present strategy explores the facile synthesis way of varieties of Cu2O-based NCs materials using harmless reagents and their feasible applications.