Development of Ag dendrites-reduced graphene oxide composite catalysts via galvanic replacement reaction

Fu, Li; Sokiransky, Mika Matsunaka; Wang, James; Lai, Guosong; Yu, Aimin

doi:10.1016/j.physe.2016.04.032

Cited by 12 publications

(4 citation statements)

References 45 publications

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“…As shown in the Fig. 3A , The IR spectrum of GO presents peaks at 1732, 1622, 1395 and 1049 cm −1 , which are assigned to the C = O stretching of COOH groups, C = O stretching vibration, C — OH stretching vibration and C — O vibrations from alkoxy groups 32 – 34 , respectively. After CV reduction, the intensity of these peaks becomes much less, indicating that the amount of oxygen-containing groups at the surface of GO is greatly reduced.…”

Section: Methodsmentioning

confidence: 94%

Synthesis of graphene/DPA composite for determination of nicotine in tobacco products

Jing

et al. 2017

Sci Rep

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In this contribution, the azo dye (E)-1-(4-((4-(phenylamino)phenyl)diazenyl) phenyl)ethanone (DPA) was combined with reduced graphene oxide (RGO) for the electrochemical modification of a pencil graphite electrode (RGO/DPA/PGE) surface. A series of electrochemical measurements were used for the characterization of the modified electrode surfaces. At the modified electrode, nicotine was irreversibly reduced. An obvious increase was observed in the reductive peak current of nicotine at the modified electrode, indicating the capability of the RGO/DPA composite to increase the electron transfer rate. The current was found proportional to the nicotine concentration in a range of 31 to 1900 μM, and the limit of detection (LOD) was calculated as 7.6 μM.

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Section: Methodsmentioning

confidence: 94%

Synthesis of graphene/DPA composite for determination of nicotine in tobacco products

Jing

et al. 2017

Sci Rep

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“…Recently, photocatalytic organic molecular processes have also been successfully detected by SERS. Semiconductor-based composite materials including Ag/TiO 2 , Au/TiO 2 , Ag/SiO 2 , Ag/RGO, Au/ZnO, Cu 2 O/Ag, etc., have been shown to have both SERS activity and photocatalytic degradation activity [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. In particular, semiconductor structures based on one-dimensional arrays have been proven to serve as excellent SERS substrates with higher sensitivity, uniformity, and reproducibility than other structures.…”

Section: Introductionmentioning

confidence: 99%

Flexible and Reusable Ag Coated TiO2 Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde

et al. 2020

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Quantitative analysis of formaldehyde (HCHO, FA), especially at low levels, in various environmental media is of great importance for assessing related environmental and human health risks. A highly efficient and convenient FA detection method based on surface-enhanced Raman spectroscopy (SERS) technology has been developed. This SERS-based method employs a reusable and soft silver-coated TiO2 nanotube array (TNA) material, such as an SERS substrate, which can be used as both a sensing platform and a degradation platform. The Ag-coated TNA exhibits superior detection sensitivity with high reproducibility and stability compared with other SERS substrates. The detection of FA is achieved using the well-known redox reaction of FA with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) at room temperature. The limit of detection (LOD) for FA is 1.21 × 10−7 M. In addition, the stable catalytic performance of the array allows the degradation and cleaning of the AHMT-FA products adsorbed on the array surface under ultraviolet irradiation, making this material recyclable. This SERS platform displays a real-time monitoring platform that combines the detection and degradation of FA.

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“…Therefore, the porous dendritic structure of the Ag-D coating is more favorable than the normal Ag coating for catalysis. In addition, the presence of MWCNTs could efficiently adsorb dye molecules via the π-π stacking interaction, resulting in a high concentration of dye molecules around the Ag dendrites [27]. Catalysis occurs only on the surface of metals; therefore, increasing the available surface area will greatly enhance the effectiveness of the catalyst [36,37].…”

Section: Resultsmentioning

confidence: 99%

“…For example, our previous work reported the synthesis of Ag-D based on a galvanic replacement method [27]. However, the use of a sacrificial metal (aluminum in our case) for Ag-D formation cannot avoid the contamination of counterpart ions.…”

Section: Introductionmentioning

confidence: 91%

Multi-Walled Carbon Nanotube-Assisted Electrodeposition of Silver Dendrite Coating as a Catalytic Film

Xie

Zhang

et al. 2017

Coatings

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Abstract:A multi-walled carbon nanotube (MWCNT)-coated indium tin oxide (ITO) slide was used as a platform for the growth of a silver dendrite (Ag-D) film using cyclic voltammetry. The particular dendritic nanostructures were formed by the diffusion-limited-aggregation model due to the potential difference between the MWCNTs and the ITO surface. The Ag-D-coated ITO film was then used for the catalytic degradation of methyl orange (MO) and methylene blue (MB) under static aqueous conditions. The network structure of the Ag-D allows the efficient diffusion of MO and MB, and consequently enhances the catalytic performance. Since the thin film is much easier to use for the post-treatment of powder catalysts, the proposed method shows great potential in many catalytic applications.

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Development of Ag dendrites-reduced graphene oxide composite catalysts via galvanic replacement reaction

Cited by 12 publications

References 45 publications

Synthesis of graphene/DPA composite for determination of nicotine in tobacco products

Synthesis of graphene/DPA composite for determination of nicotine in tobacco products

Flexible and Reusable Ag Coated TiO2 Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde

Multi-Walled Carbon Nanotube-Assisted Electrodeposition of Silver Dendrite Coating as a Catalytic Film

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