Effect of annealing temperature and Ag contents on the catalytic activity and supercapacitor performances of Ag@Ag2O/RGO nanocomposites

被引：23
作者：
Khairy, M. [1 ,2 ]
Mohamed, Mohamed Mokhtar [1 ]
Reda, S. M. [1 ]
Ibrahem, Ahmed [3 ]
机构：
[1] Benha Univ, Chem Dept, Fac Sci, Banha, Egypt
[2] Imam Mohammad Ibn Saud Islamic Univ, Chem Dept, Coll Sci, Riyadh, Saudi Arabia
[3] Duravit, Elmosliser Ahmed Ismaila,Sheratnn.Heliopolis 9 Sq, Cairo 1160, Egypt
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2019年 / 242卷
关键词：
Ag@Ag2O/RGO; Effect of temperature; Catalytic activity; 4-Nitrophenol reduction; Supercapacitor; REDUCED GRAPHENE OXIDE; NITROGEN-DOPED GRAPHENE; PHOTOCATALYTIC ACTIVITY; FACILE SYNTHESIS; ELECTROCHEMICAL SYNTHESIS; HYDROTHERMAL SYNTHESIS; SILVER NANOPARTICLES; GOLD NANOPARTICLES; REDUCTION; CARBON;
D O I：
10.1016/j.mseb.2019.03.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ag@Ag2O/RGO nanocomposites with different loads of Ag (0.4%-8.5%) were synthesized using a simple deposition method in the presence of a triblock copolymer template at different annealing temperatures (250 degrees C and 400 degrees C). All samples were characterized with various techniques such as XRD, FTIR, Raman, TEM-SAED, N-2 sorptiometry and UV-Vis diffuse reflectance. The supercapacitor performance of the samples was measured. Besides, the catalytic performances of the samples towards 4-nitrophenol (4-NP) reduction were tested under dark conditions. The results revealed the well dispersion of Ag and Ag2O moieties on RGO with crystallite size in the range of 17-34 nm. The nanocomposite Ag@Ag2O/RGO annealed at 400 degrees C exhibited the highest reduction rate constant for 4-NP reduction (0.01 s(-1)). In addition, this composite has shown the highest specific capacitance of 312Fg(-1) at scan rate of 20 mV s(-1) and 119 F g(-1) at a current density of 11 mA g(-1).
引用
收藏
页码：90 / 103
页数：14
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