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Preparation of wood-based filter loaded with Ag nanoparticles and its catalytic degradation performance on organic dye(PDF)

Journal of Forestry Engineering[ISSN:2096-1359/CN:32-1862/S]

Issue:
2020 No.06
Page:
94-98
Research Field:
林产化学加工 执行主编:王飞 张美云
Publishing date:
2020-11-01

Info

Title:
Preparation of wood-based filter loaded with Ag nanoparticles and its catalytic degradation performance on organic dye
Author(s):
CHENG Zhiyong MENG Junwang WANG Xiaoqing*
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
Keywords:
wood Ochroma pyramidale filter silver nanoparticles organic dye catalytic degradation
PACS:
S781.7
DOI:
10.13360/j.issn.2096-1359.202004005
Abstract:
The extensive release of organic contaminants from the chemical industry has currently been a major source of water pollution. The development of lowcost, ecofriendly, and highperformance functional materials based on renewable resources for organic dye wastewater treatment are highly demanded. As a naturally growing porous structural material, wood consisting of numerous open microchannels along the growth direction may serve as a desirable scaffold for the development of efficient filtration materials for wastewater treatment. In this study, by in situ deposition of silver nanoparticles (Ag NPs) in the mesoporous structure of balsa wood, Ag/wood composite filters were developed for removing methylene blue (MB) from water, which was accomplished by the synergistic effects of the porous wood structure, providing highspeed channels for water transport and the catalytic activity of Ag NPs anchored to the surface of the wood channels. The asprepared woodbased filters were characterized by the fieldemission scanning electron microscopy, transmission electron microscopy and Xray diffraction. The catalytic degradation performance of the Ag/wood composite filters for removing MB was investigated. The results showed that the porous structure of natural wood was well preserved after the decoration with Ag NPs, and the Ag NPs were uniformly distributed on the channel surfaces of wood vessels, with a size range of 5-20 nm. The Ag/wood composite filters could effectively remove MB (in the presence of NaBH4) from water during the filtration process due to the catalytic activity of Ag NPs anchored to the vessel channels, and the MB removal efficiency and water flux were highly dependent on the thickness of the woodbased filters. Specifically, the gravitydriven Ag/wood composite filter with a thickness of 6 mm showed desirable performance with a high MB degradation efficiency of 94.03% and a water flux of 2 600 L/(m2·h). The proposed Agdecorated woodbased filters have advantages of facile processing, low cost and scalability, displaying great potential for organic dye wastewater treatment.

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Last Update: 2020-11-11