What do you use gold nanoparticles? Borohydride without gold can recover methyl orange. First you recover methyl orange borohydride. Then unknown product oxidized by atmospheric oxygen in the presence of gold.

Best regards.

Thank you, Mr. Mirgorod. I am using gold nanoparticles as a catalyst for the degradation of methyl orange. From what you have said, if I understood correctly, then that means borohydride can recover the degraded Methyl orange even after reaction with the catalyst? 

Regards

Aruni

To degrade methyl orange can be oxygen and borohydride. I understand that you are using for this borohydride.

Hai, I study the catalytic degradation of Methyl Orange Sodium Borohydride mixture in presence of Gold Catalyst

1.Methyl Orange +Borohydride =methyl orange is degrading to 90%

2.methyl orange is degrading to 90% + gold nanoparticles+NaB(OH)4 = peak reappears after some time and the degradation is reduced to 50%.

gold nanoparticles+NaB(OH)4 see

http://pubs.rsc.org/En/content/articlelanding/2014/cc/c4cc05946h#!divAbstract

Best regards

Thank you Dr. Mirgorod. I think this clears my question of complete degradation of methyl orange in presence of borohydride and gold at first and then the reduction in degradation efficiency.