SnAg 2 O 3 -Coated Adhesive Tape as a Recyclable Catalyst for Efficient Reduction of Methyl Orange.

Silver oxide-doped tin oxide (SnAg 2 O 3 ) nanoparticles were synthesized and different spectroscopic techniques were used to structurally identify SnAg 2 O 3 nanoparticles. The reduction of 4-nitrophenol (4-NP), congo red (CR), methylene blue (MB), and methyl orange (MO) was studied using SnAg 2 O 3 as a catalyst. Only 1.0 min was required to reduce 95% MO; thus, SnAg 2 O 3 was found to be effective with a rate constant of 3.0412 min -1 . Being a powder, SnAg 2 O 3 is difficult to recover and recycle multiple times. For this reason, SnAg 2 O 3 was coated on adhesive tape (AT) to make it recyclable for large-scale usage. SnAg 2 O 3 @AT catalyst was assessed toward MO reduction under various conditions. The amount of SnAg 2 O 3 @AT, NaBH 4 , 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 SnAg 2 O 3 @AT and NaBH 4 as well as lowering the MO concentration. SnAg 2 O 3 @AT totally reduced MO (98%) in 3.0 min with a rate constant of 1.3669 min -1 . These findings confirmed that SnAg 2 O 3 @AT is an effective and useful catalyst for MO reduction that can even be utilized on a large scale for industrial purposes.