原位光催化聚合制备聚(N-乙烯基咔唑)/TiO<sub>2</sub>纳米复合材料及其光催化性能

doi:10.11896/cldb.19030087

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Abstract As a photocatalyst, TiO₂ has broad application prospects in many fields such as industrial wastewater and environmental pollutant treatment. However, TiO₂ powders are prone to aggregation and they primarily exist in aqueous solution with suspended state, and difficult to be completely recovered, thus leading to secondary pollution, which greatly limits its application in practical industrialization. In this work, poly(N-vinyl carbazole)/TiO₂ nanocomposites (PVK/TiO₂) were synthesized via a in-situ polymerization of N-vinylcarbazole catalyzed by TiO₂ nanoparticles under ultraviolet irradiations. A series of techniques including NMR, TEM, XRD, FTIR, UV-vis adsorption spectroscopy, and fluorescence spectroscopy were adopted to characterize the nanocomposites. The results indicate that the TiO₂ nanoparticles possess high photocatalytic activities for N-vinylcarbazole monomer and the polymerization can be initiated without the addition of external photoinitiators under ultraviolet irradiations. The TiO₂ nanoparticles are uniformly dispersed in the nanocomposites after a washing pretreatment. With the increase of TiO₂ content, the fluorescence quenching effect of the nanocomposite is obviously enhanced. It is found for the first time that PVK polymer itself has a significant photodegradation activity for methyl orange under ultraviolet light. The PVK/TiO₂ nanocomposites demonstrate superior photocatalytic performance than PVK or TiO₂ nanoparticles alone to degrade methyl orange under the same experimental conditions, indicating that the photodegradation property of TiO₂ is significantly enhanced by PVK. By taking advantages of excellent heat resistance, corrosion resistance, film forming properties and high mechanical strength of PVK, the PVK/TiO₂ nanocomposites can produce a large variety of photodegradation devices in the form of powders, films, fibers and tubes, and therefore have a bright prospect in industrial applications.

Key words： TiO₂ nanoparticle poly(N-vinyl carbazole) nanocomposite material photocatalytic degradation

Published: 03 January 2020

CLC number:

O643. 3

About author:: Yifeng Zhugraduated at the Zhejiang University of Technology and obtained his doctor degree of Enginee-ring in 2005. He currently works as a professor in the field of nanosized catalytical materials;Huadong Tangreceived his Ph.D. degree in materials from department of materials, Sichuan University in 1999. He returned to China in 2011 as an invited expert for the "Thousand People Plan" Recruitment Program in Zhejiang Province. He is currently a full professor in College of Chemical Engineering, Zhejiang University of Technology. His research is focused on the transition metal nanoparticle catalyzed polymerizations of vinyl monomers. He has published many SCI papers in internationally renowned journals and applied for more than 20 invention patents.

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	ZHU Yifeng
	HUANG Xiaogang
	ZHU Wenxian
	ZHANG Panpan
	TANG Huadong

Cite this article:

ZHU Yifeng,HUANG Xiaogang,ZHU Wenxian, et al. Preparation of Poly(N-vinyl carbazole)/TiO₂ Nanocomposite by In-situ Photocatalytical Polymerization and Its Photocatalytic Performance[J]. Materials Reports, 2020, 34(2): 2147-2152.

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http://www.mater-rep.com/EN/10.11896/cldb.19030087 OR http://www.mater-rep.com/EN/Y2020/V34/I2/2147

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