Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe2O3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties

被引:106
|
作者
Bharath, G. [1 ,2 ]
Anwer, Shoaib [3 ]
Mangalaraja, R. V. [3 ]
Alhseinat, Emad [1 ]
Banat, Fawzi [4 ]
Ponpandian, N. [5 ]
机构
[1] Khalifa Univ Sci & Technol, Dept Chem Engn, POB 127788, Abu Dhabi, U Arab Emirates
[2] Univ Concepcion, Dept Mat Engn, Adv Ceram & Nanotechnol Lab, Fac Engn, Concepcion, Chile
[3] Khalifa Univ Sci & Technol, Dept Mech Engn, POB 127788, Abu Dhabi, U Arab Emirates
[4] Khalifa Univ Sci & Technol, Petr Inst, Dept Chem Engn, Abu Dhabi, U Arab Emirates
[5] Bharathiar Univ, Dept Nanosci & Technol, Coimbatore, Tamil Nadu, India
来源
SCIENTIFIC REPORTS | 2018年 / 8卷
关键词
GOLD NANOPARTICLES; NANORODS;
D O I
10.1038/s41598-018-24066-y
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In this present study, we report the synthesis of Au nanodots on alpha-Fe2O3@reduced graphene oxide (RGO) based hetero-photocatalytic nanohybrids through a chlorophyll mediated photochemical synthesis. In this process, chlorophyll induces a rapid reduction (30 min) of Au3+ ions to Au degrees metallic nanodots on alpha-Fe2O3@RGO surface under sunlight irradiation. The nucleation growth process, photo-induced electron-transfer mechanism and physico-chemical properties of the Au@alpha-Fe2O3@RGO ternary nanocomposites were systematically studied with various analytical techniques. This novel photochemical synthesis process is a cost-effective, convenient, surfactant-less, and scalable method. Moreover, the prepared ternary nanocomposites enhanced catalytic activity as compared to pure alpha-Fe2O3 and alpha-Fe2O3@RGO. The advantages and synergistic effect of Au@alpha-Fe2O3@RGO exhibit, (i) a broader range of visible-light absorption due to visible light band gap of alpha-Fe2O3, (ii) lower recombination possibility of photo-generated electrons and holes due to effect of Au and (iii) faster electron transfer due to higher conductivity of RGO. Therefore, the prepared Au@alpha-Fe2O3@ RGO hetero-photocatalytic nanohybrids exhibited a remarkable photocatalytic activity, thus enabling potential active hetero-photocatalyst for industrial and environmental applications.
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页数:14
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