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      https://www.ias.ac.in/article/fulltext/boms/044/0247

    • Keywords

       

      Environmental remediation; nanoflowers; nanostructures; photocatalysis; zinc oxide.

    • Abstract

       

      ZnO-flaky-like nanoflowers with enhanced photocatalytic activity were synthesized by a new hydrothermal technique. The material was characterized and the photocatalytic studies were conducted under solar light irradiation for a model azo dye, Orange G. The material was compared with ZnO nanosphere and nanorod. The results showed the particle size of the nanostructures as a nanorod is 62–81 nm, as a nanosphere is 40–70 nm and as flaky nanoflowers is 20–30 nm (thickness of the flake). The photocatalytic activity showed an enhanced 2-fold increase in the activity for nanoflowers when compared to nanorods and spheres. The Brauner–Emmett–Teller results showed that the nanoflowers (14.197 m$^2$ g$^{-1}$) had a higher surface area nearly 3.5 times when compared to the nanospheres (4.06 m$^2$ g$^{-1}$) and seven times with nanorods (2.1 m$^2$ g$^{-1}$) which is the possibility of such high photocatalytic activity. The smaller particle size and the arrangement of nanoflowers play an important role in enhanced photocatalytic activity.

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    • Author Affiliations

       

      G A SUGANYA JOSEPHINE1 K JAYAPRAKASH2 G MEENAKSHI3 A SIVASAMY2 G NIRMALA DEVI4 R N VISWANATH4

      1. Department of Chemistry, Aarupadai Veedu Institute of Technology – Vinayaka Mission Research Foundation, Rajiv Gandhi Salai, Paiyanoor, Kanchipuram 603104, India
      2. Chemical Engineering Area, CSIR-Central Leather Research Institute, Adyar 600020, India
      3. Quaid-e-Millath Government College for Women, Anna Salai, Chennai 600002, India
      4. Department of Physics, Aarupadai Veedu Institute of Technology – Vinayaka Mission Research Foundation, Rajiv Gandhi Salai, Paiyanoor, Kanchipuram 603104, India
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