Abstract
A facile and green method for synthesizing Zinc Oxide nanoparticles (ZnO NPs) was successfully carried out using unutilized sweet lime; i.e., Citrus Limetta rind pulp (U-CLRP) extract. The structural, morphological and optical studies were elucidated to confirm the crystallinity, size, and shape of the synthesized NPs. Copper doping on ZnO NPs (CZnO NPs) was carried out to enhance the optical properties. The as-prepared and doped nanoparticle's potential for efficient degradation of a commercial dye, Methylene Blue (MB), was tested under Ultraviolet (UV) and visible light radiation. ZnO NPs showed promising results for dye degradation while an improved result was witnessed for CZnO NPs. ZnO NPs showed 74% of degradation of MB dye under UV irradiation and 57% degradation under visible light radiation. CZnO NPs presented 85 and 90% degradation in the UV and visible radiation, respectively. This green reduction method utilizing biological waste sources shows a promising path for photocatalysts to be developed economically as well as efficiently in the future. These CZnO/ ZnO NPs proved their potential for embedding them as efficient catalysts for wastewater treatment plants of textile industries.
Highlights
We are living in a world where automated machines are accessible, and clean drinking water resources are hard to find
Unutilized Citrus limetta rind pulp extract was successfully used for the synthesis of Zinc oxide (ZnO) as well as CZnO NPs
ZnO nanoparticles (ZnO NPs) showed maximum absorbance at 357 nm while CZnO NPs showed at 364 nm
Summary
We are living in a world where automated machines are accessible, and clean drinking water resources are hard to find. Population overgrowth, and lethargic utilisation of natural resources have severely impacted drinking water quality all over the world, especially the developing nations. Numerous toxic compounds present in the water source pose a great threat for the healthy life of human beings. Leather, textile and municipal sewage disposal pollute the water sources in an unimaginable manner. Textile industries evict almost 20% of total dye produced from all over the world as effluents into water sources (Sajid et al 2018). Removal of MB dye from textile wastewater streams will be an environmentally important task to assure clean water streams
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