Facile Synthesis of Copper Telluride Nanoparticles as a Robust Nanoenzymatic Catalyst for Intrinsic Peroxidase‐Like Activity
Nandita Chauhan, Nikhil Sharma, Salahuddeen Buhari, Prabhu Prasad Das, Sanjay Kumar, Ashish Chalana
Abstract
Abstract Copper telluride nanoparticles are classified as the family of metal chalcogenides and were synthesized using a simple solvothermal method using a new source of telluride, ditelluride diphenyl. The characterized techniques revealed that the atomic composition of copper tellurides is Cu 2 Te and particles are spherical. This study is greatly examined by different designed experiments for the proof of the intrinsic peroxidase‐like activity of copper telluride nanoparticles and its effectiveness in a variety of similar structures. Cu 2 Te nanoparticles can convert peroxidase substrates (TMB and OPD) to colored products in the presence of H 2 O 2. In addition, the as‐prepared nanoparticles have the potential to oxidize DPPH and ABTS substrates. Michaelis–Menten constant K M value for TMB and H 2 O 2 was found to be 12 mM and 0.60 mM for H 2 O 2 and the V max value of the Cu 2 Te was found to be TMB and H 2 O 2 was 2.50×10 −7 and 0.82×10 −8 MS −1 . These data are found to be almost comparable with natural peroxidase HRP and other artificial enzymes reported in the literature. The natural peroxidase‐like activities of Cu 2 Te nanoparticles originated from the catalytic decomposition of H 2 O 2 into ⋅OH radical, which was confirmed from the ESR spin‐trapping technique and using a fluorescence probe, terephthalic acid.