SnAg₂O₃-Coated Adhesive Tape as a Recyclable Catalyst for Efficient Reduction of Methyl Orange

Silver oxide-doped tin oxide (SnAg₂O₃) nanoparticles were synthesized and different spectroscopic techniques were used to structurally identify SnAg₂O₃ nanoparticles. The reduction of 4-nitrophenol (4-NP), congo red (CR), methylene blue (MB), and methyl orange (MO) was studied using SnAg₂O₃ as a catalyst. Only 1.0 min was required to reduce 95% MO; thus, SnAg₂O₃ was found to be effective with a rate constant of 3.0412 min^-1. Being a powder, SnAg₂O₃ is difficult to recover and recycle multiple times. For this reason, SnAg₂O₃ was coated on adhesive tape (AT) to make it recyclable for large-scale usage. SnAg₂O₃@AT catalyst was assessed toward MO reduction under various conditions. The amount of SnAg₂O₃@AT, NaBH₄, and MO was optimized for best possible reduction conditions. The catalyst had a positive effect since it speed up the reduction of MO by adding more SnAg₂O₃@AT and NaBH₄ as well as lowering the MO concentration. SnAg₂O₃@AT totally reduced MO (98%) in 3.0 min with a rate constant of 1.3669 min^-1. These findings confirmed that SnAg₂O₃@AT is an effective and useful catalyst for MO reduction that can even be utilized on a large scale for industrial purposes.