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    Cellulose Microfiber-Supported TiO2@Ag Nanocomposites: A Dual-Functional Platform for Photocatalysis and in Situ Reaction Monitoring

    Year: 2018

    Journal: Ind. Eng. Chem. Res., Volume 57, nov-28, page 4277–4286

    Authors: Zhang, Guolin; Chen, Long; Fu, Xiaoqi; Wang, Hui

    Organizations: National Science Foundation through a CAREER Award [DMR-1253231]; EPSCoR RU Track-I Award [OIA-1655740]; National Natural Science Foundation of China [51302113]; Natural Science Foundation of Jiangsu Province [BK20130512]; Jiangsu University Study-Abroad Funds [20162673]; Graduate Research Grant from Jiangsu University [15A076]; Innovation and Entrepreneurship Training Program of Jiangsu Province, China [201710299016Z]

    Photocatalytic degradation of toxic organic pollutants in aquatic environments provides an efficient, cost-effective, and sustainable approach to environmental remediation. The optimization of photocatalytic detoxification processes essentially relies not only on the capability to fine-tailor the structures and compositions of the photocatalysts but also on detailed understanding of the mechanisms that dictate the photocatalytic interfacial molecular transformations. Here we have designed and constructed a hierarchically organized suprastructure comprising TiO2@Ag nanocomposite particles supported by cellulose microfiber matrices, which serves as both an efficient photocatalyst for the photodegradation of 4-chlorophenol into mineralized small molecules and a robust substrate for plasmon-enhanced molecular spectroscopy. Such dual functionalities provide unique opportunities for us to precisely monitor, in real time, the detailed photocatalytic molecular transformations occurring at the molecule-catalyst interfaces using surface-enhanced Raman scattering as an ultrasensitive, time resolving, and molecular fingerprinting spectroscopic tool.
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