Ag-doped ZnO nanoellipsoids: Potential scaffold for photocatalytic and sensing applications

被引:84
|
作者
Kumar, Ramesh [1 ]
Rana, Dilbag [1 ]
Umar, Ahmad [2 ,3 ]
Sharma, Pankaj [1 ]
Chauhan, Suvarcha [1 ]
Chauhan, Mohinder Singh [1 ]
机构
[1] Himachal Pradesh Univ, Dept Chem, Shimla 5, India
[2] Najran Univ, Fac Sci & Arts, Dept Chem, Najran 11001, Saudi Arabia
[3] Najran Univ, Promising Ctr Sensors & Elect Devices, Najran 11001, Saudi Arabia
关键词
Ag-doped ZnO nanoellipsoids; Photocatalyst; Electron mediator; Methyl orange; Hydrazine sensor; MICROWAVE-ASSISTED SYNTHESIS; CHEMICAL SENSOR; VISIBLE-LIGHT; ESCHERICHIA-COLI; GLUCOSE SENSOR; METHYL-ORANGE; NANOPARTICLES; WATER; HYDRAZINE; DEGRADATION;
D O I
10.1016/j.talanta.2015.01.039
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Well-crystalline Ag-doped ZnO nanoellipsoids (NEs) were synthesized in large quantity and used as effective photocatalyst for the photocatalytic degradation of methyl orange (MO) and efficient electron mediator for the fabrication of highly sensitive, reliable and robust hydrazine chemical sensor. The Ag-doped NEs were synthesized by facile low-temperature (similar to 60 degrees C) solution process and characterized in detail using various characterization techniques. The characterizations revealed that the synthesized nanostructures are well-crystalline, possessing ellipsoidal shapes and were grown in very high density. The photocatalytic activities of these Ag-doped NEs were evaluated by measuring the rate of photodegradation reaction of hazardous methyl orange (MO) dye under UV light irradiation. By comparing the photocatalytic performance of Ag-doped ZnO NEs with those of ZnO nanoflowers, the former was found to be a much superior photocatalyst than the later. Further, Ag-doped ZnO NEs based hydrazine sensor exhibited a high sensitivity of similar to 9.46 mu A/cm(2) mu M and detection limit of 0.07 mu M in a response time of < 10 s. Thus we find that Ag-doped ZnO nanomaterials synthesized by simple solution process holds potential as efficient photocatalysts and efficient electron mediators for the fabrication of robust and highly sensitive chemical sensors. (C) 2015 Elsevier B.V. All rights reserved.
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页码:204 / 213
页数:10
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