Published date
Received 1 August 2016, Revised 27 August 2016, Accepted 30 August 2016, Available online 13 September 2016
Author
Highlights
Abstract
The application of metal nanoparticles (NPs) in catalysis has drawn significant research interest, including in their applications to the wastewater treatment. Nanocellulose can be a versatile support/carrier in stabilizing metal NPs catalysts, due to its unique properties. In this paper, hexadecyl-trimethylammonium bromide (CTAB) surfactant-adsorbed cellulose nanocrystals (CNC) was employed as a support for silver nanoparticles (Ag NPs). The obtained CNC/CTAB/Ag nanohybrid composite was characterized by ultraviolet–visible (UV–vis) spectroscopy, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). The results of the catalytic reaction experiments showed that Ag NPs immobilized on CTAB-adsorbed CNC displayed higher catalytic efficiency towards the reduction of 4-nitrophenol to 4-aminophenol, compared to the control Ag NPs and CNC/Ag samples. The enhanced catalytic performance of Ag NPs was attributed to the improved dispersity and narrow distribution of silver nanoparticles in the catalytic system. This work provides a novel catalyst based on CNC-CTAB stabilized Ag NPs which would have promising applications towards catalytic treatment of wastewater.
Graphical Abstract
For further details log on website :
http://www.sciencedirect.com/science/article/pii/S0144861716310517
Received 1 August 2016, Revised 27 August 2016, Accepted 30 August 2016, Available online 13 September 2016
Author
- a Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
- b Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada
Highlights
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- CNC/CTAB/Ag nanohybrid catalyst with small size and narrow particle distribution, was synthesized by a facile method.
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- The steric barriers and increased charges from CTAB surfactant contributed to the improved Ag NPs stability and dispersity.
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- CNC/CTAB/Ag nanohybrid catalyst exhibited an excellent catalytic activity (545 h−1) and pseudo-first order rate constant (1.6 × 10−3 s−1) in the reduction of 4-nitrophenol (4-NP) by NaBH4 to 4-aminophenol (4-AP).
Abstract
The application of metal nanoparticles (NPs) in catalysis has drawn significant research interest, including in their applications to the wastewater treatment. Nanocellulose can be a versatile support/carrier in stabilizing metal NPs catalysts, due to its unique properties. In this paper, hexadecyl-trimethylammonium bromide (CTAB) surfactant-adsorbed cellulose nanocrystals (CNC) was employed as a support for silver nanoparticles (Ag NPs). The obtained CNC/CTAB/Ag nanohybrid composite was characterized by ultraviolet–visible (UV–vis) spectroscopy, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). The results of the catalytic reaction experiments showed that Ag NPs immobilized on CTAB-adsorbed CNC displayed higher catalytic efficiency towards the reduction of 4-nitrophenol to 4-aminophenol, compared to the control Ag NPs and CNC/Ag samples. The enhanced catalytic performance of Ag NPs was attributed to the improved dispersity and narrow distribution of silver nanoparticles in the catalytic system. This work provides a novel catalyst based on CNC-CTAB stabilized Ag NPs which would have promising applications towards catalytic treatment of wastewater.
Graphical Abstract
For further details log on website :
http://www.sciencedirect.com/science/article/pii/S0144861716310517
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