Technological Advancement in Photocatalytic Degradation of Dyes Using Metal-Doped Biopolymeric Composites—Present and Future Perspectives

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Nanomaterials and Nanocomposites for Environmental Remediation

Abstract

The rapid and extensive industrialization and the unrestrained growth of modern textile industries together with the lack of appropriate wastewater treatment facilities led to the discharge of effluents into water bodies, thereby causing a serious threat to the environment. The presence of such pollutants in the water bodies deteriorates the water quality and makes it unfit for use. From an environmental perspective, it is essential to develop new technologies for the wastewater treatment and recycling of dye-contaminated water. The metal-doped polymeric and biopolymeric materials, especially chitosan and cellulose composites based photocatalysts, have a prominent role in the removal of toxic organic dyes from water. Since adsorption is the key step of photocatalysis, it can be assumed that do** of metals with chitosan and cellulose biopolymers can show a synchronous effect in improving photocatalytic activity. The surface modification of biopolymers with metals produces more active sites at the surface of the adsorbent, which enhances dye and semiconductor interaction as well as suppresses electron–hole recombination rates during the photocatalytic process. Herein, the chapter brought in the thought of the application of various metal activated composites in wastewater photodegradation and suggested the versatility in composites for the development of rapid, selective, and effective degradation processes for the removal of a variety of organic dyes. It further emphasized the existing obstruction and impending prediction for the deprivation of dyes via photocatalytic techniques.

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Sirajudheen, P., Vigneshwaran, S., Karthikeyan, P., Nabeena, C.P., Meenakshi, S. (2021). Technological Advancement in Photocatalytic Degradation of Dyes Using Metal-Doped Biopolymeric Composites—Present and Future Perspectives. In: Singh, S.P., Rathinam, K., Gupta, T., Agarwal, A.K. (eds) Nanomaterials and Nanocomposites for Environmental Remediation. Energy, Environment, and Sustainability. Springer, Singapore. https://doi.org/10.1007/978-981-16-3256-3_9

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