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

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