Enhanced optical absorption and pollutant adsorption for photocatalytic performance of three-dimensional porous cellulos
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Enhanced optical absorption and pollutant adsorption for photocatalytic performance of three-dimensional porous cellulose aerogel with BiVO4 and PANI Lele Wang1, Shanshan Chen1, Pengcheng Wu1, Keliang Wu1, Jianning Wu1, Guihua Meng1, Juan Hou2, Zhiyong Liu1,a) , Xuhong Guo1 1
School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/ Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, People’s Republic of China 2 School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/ Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, People’s Republic of China; and Department of Physics of Xinjiang Bingtuan, College of Science/Key Laboratory of Ecophysics, Shihezi, Xinjiang 832003, People’s Republic of China a) Address all correspondence to this author. e-mail: [email protected] Received: 20 October 2019; accepted: 28 January 2020
This work demonstrates a double-step method, a simple chemical bath deposition and an in situ polymerization process, to synthesize the stable structure of a composite of Polyaniline/BiVO4/cellulose aerogel (PBC) in wastewater treatment. The poor stability of the carrier catalyst was improved significantly by forming a dense film of polyaniline (PANI) through polymerization on BiVO4/cellulose aerogel (BC). The developed threedimensional porous structure enhanced photocatalytic stability. For instance, photocatalytic degradation of a dye, methylene blue, reached to 91.67% under the eight times successive irradiation of the visible light. The resulted fine performance could be owed to the strong adsorption of cellulose aerogel, uniform spreading of BiVO4, and the speedy electron separation efficiency of PBC. Moreover, the photocatalytic mechanisms including the role of the free radicals ( OH and O2−) of the developed PBC were also discussed. The novel structure may present a new insight into the development of the carrier catalyst. d
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Introduction The rapid development of dye industries has been creating a huge amount of wastewater contaminated with dye, causing adverse effects on human health [1, 2]. It is imperative to find ways to remove dye completely from wastewater. Traditionally, the dye macromolecules have been removed by using several methods such as adsorption [3], barrier separation [4], and photocatalytic degradation [5]. So far, the semiconductor photocatalysis technology has shown excellent catalytic activity in dyeing and other refractory organic wastewater treatments by being environment-friendly, cost-effective, and having strong oxidation ability [6]. Over the past few decades, the visible ligh
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